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Note: This page contains sample records for the topic "numerous naval propulsor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Advances and Trends of Bionic Underwater Propulsors  

Science Conference Proceedings (OSTI)

In recent twenty years, tens of the bionic underwater prototype propulsors which imitate aquatic animals have been invented. The bionic principles hand classification of bionic propulsors were presented firstly. The main advance of the bionic propulsors ... Keywords: Bionic underwater propulsor, fish robot, undulation fin, neural control, underwater vehicle

Daibing Zhang; K. H. Low; Haibin Xie; Lincheng Shen

2009-05-01T23:59:59.000Z

2

Steady and unsteady dynamics of an azimuthing podded propulsor related to vehicle maneuvering  

E-Print Network (OSTI)

While the implementation of azimuthing propulsors powered by internal electric motors (often called "podded propulsors") into the commercial ship market has been swift, the understanding of their hydrodynamics through ...

Stettler, Jeffrey W. (Jeffrey Wayne)

2004-01-01T23:59:59.000Z

3

Naval applications study areas  

SciTech Connect

This memorandum discusses study areas and items that will require attention for the naval studies of the utilization of nuclear propulsion in a submarine-based missile system.

Hadley, J. W.

1962-06-20T23:59:59.000Z

4

Naval Nuclear Propulsion Program Directorate, Washington ...  

Science Conference Proceedings (OSTI)

Naval Nuclear Propulsion Program Directorate, Washington, DC. NVLAP Lab Code: 100565-10. Address and Contact Information: Naval Reactors ...

2013-07-26T23:59:59.000Z

5

NAVAL POSTGRADUATE SCHOOL MONTEREY, CALIFORNIA  

E-Print Network (OSTI)

), Stockholm Intl Peace Research Inst, Oxford University Oress 337 p., 1997. Arkin, WM and J Handler, Naval Geochemistry (eds. AC Sigleo and A Hattori), Lewis Publishers, Inc., Chelsea, MI, 97-119, 1985. Brungot, AL

6

Fracture of aluminum naval structures  

E-Print Network (OSTI)

Structural catastrophic failure of naval vessels due to extreme loads such as underwater or air explosion, high velocity impact (torpedoes), or hydrodynamic loads (high speed vessels) is primarily caused by fracture. ...

Galanis, Konstantinos, 1970-

2007-01-01T23:59:59.000Z

7

Naval Spent Fuel Rail Shipment Accident Exercise Objectives ...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Naval Spent Fuel Rail Shipment Accident Exercise Objectives Naval Spent Fuel Rail Shipment Accident Exercise Objectives Naval Spent Fuel Rail Shipment Accident Exercise Objectives...

8

2013 Annual Planning Summary for the Naval Nuclear Propulsion...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Naval Nuclear Propulsion Program 2013 Annual Planning Summary for the Naval Nuclear Propulsion Program 2013 Annual Planning Summary for the Naval Nuclear Propulsion Program The...

9

Design and analysis of a permanent magnet generator for naval applications  

E-Print Network (OSTI)

This paper discusses the electrical and magnetic design and analysis of a permanent magnet generation module for naval applications. Numerous design issues are addressed and several issues are raised about the potential ...

Rucker, Jonathan E. (Jonathan Estill)

2005-01-01T23:59:59.000Z

10

Naval Petroleum Reserves | Department of Energy  

NLE Websites -- All DOE Office Websites (Extended Search)

Naval Petroleum Reserves For much of the 20th century, the Naval Petroleum and Oil Shale Reserves served as a contingency source of fuel for the Nation's military. All that...

11

Naval Nuclear Propulsion Program Directorate, Washington ...  

Science Conference Proceedings (OSTI)

Naval Nuclear Propulsion Program Directorate, Washington, DC. NVLAP Lab Code: 100565-0. Address and Contact Information: ...

2013-08-23T23:59:59.000Z

12

Naval Nuclear Propulsion Program Directorate, Washington ...  

Science Conference Proceedings (OSTI)

Naval Nuclear Propulsion Program Directorate, Washington, DC. NVLAP Lab Code: 100565-2. Address and Contact Information: Point Loma, Bldg. ...

2013-08-23T23:59:59.000Z

13

NAVAL RESEARCH LABORATORY Information Technology Solutions  

power (CHP) or emergency backup power Small, High Efficiency, Recuperated Ceramic Turboshaft Engine NAVAL RESEARCH LABORATORY TECHNOLOGY T RANSFER ...

14

Geothermal energy at Long Beach Naval Shipyard and Naval Station and at Seal Beach Naval Weapons Station, California. Final report  

DOE Green Energy (OSTI)

The purpose of this project was to determine and evaluate sources of geothermal energy at two military bases in southern California, the Long Beach Naval Shipyard and Naval Station and the Seal Beach Naval Weapons Station. One part of the project focused on the natural geothermal characteristics beneath the naval bases. Another part focused on the geothermal energy produced by oilfield operations on and adjacent to each base. Results of the study are presented here for the US Department of the Navy to use in its program to reduce its reliance on petrolem by the development of different sources of energy. The study was accomplished under a cooperative agreement between the US Department of Energy's San Francisco Operations Office and the Department of the Navy's Naval Weapons Center, China Lake, California, for joint research and development of geothermal energy at military installations.

Higgins, C.T.; Chapman, R.H.

1984-01-01T23:59:59.000Z

15

EA-1008: Continued Development of Naval Petroleum Reserve No...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

8: Continued Development of Naval Petroleum Reserve No. 3 (Sitewide), Natrona County, Wyoming EA-1008: Continued Development of Naval Petroleum Reserve No. 3 (Sitewide), Natrona...

16

EA-1236: Preparation for Transfer of Ownership of Naval Petroleum...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

236: Preparation for Transfer of Ownership of Naval Petroleum Reserve No. 3, Natrona County, WY EA-1236: Preparation for Transfer of Ownership of Naval Petroleum Reserve No. 3,...

17

Naval Nuclear Propulsion Plants | National Nuclear Security Administra...  

National Nuclear Security Administration (NNSA)

Naval Nuclear Propulsion Plants In naval nuclear propulsion plants, fissioning of uranium atoms in the reactor core produces heat. Because the fission process also produces...

18

Distributed energy resources at naval base ventura county building 1512  

E-Print Network (OSTI)

Naval Base Ventura County Standby Generator OptimizationC&H Engineering performed a standby generator optimizationOn Naval Base Ventura County Standby Generator Optimization

Bailey, Owen C.; Marnay, Chris

2004-01-01T23:59:59.000Z

19

2013 Federal Energy and Water Management Award Winner Naval Sea...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Naval Sea Systems Command 2013 Federal Energy and Water Management Award Winner Naval Sea Systems Command fewm13nswcphiladelphiahighres.pdf fewm13nswcphiladelphia.pdf More...

20

A Review of OLED Research at Naval Research Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

Division at Naval Research Laboratory. Her research is focused on organic light emitting diode (OLED) material and devices. She will discuss the research activities at Naval...

Note: This page contains sample records for the topic "numerous naval propulsor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

More About NNSA's Naval Reactors Office | National Nuclear Security...  

National Nuclear Security Administration (NNSA)

Naval Reactors Office The Naval Nuclear Propulsion Program provides militarily effective nuclear propulsion plants and ensures their safe, reliable and long-lived operation. This...

22

Management of Naval Reactors' Cyber Security Program, OIG-0884  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Naval Reactors' Naval Reactors' Cyber Security Program DOE/IG-0884 April 2013 U.S. Department of Energy Office of Inspector General Office of Audits and Inspections Department of Energy Washington, DC 20585 April 12, 2013 MEMORANDUM FOR THE SECRETARY FROM: Gregory H. Friedman Inspector General SUBJECT: INFORMATION: Audit Report on "Management of Naval Reactors' Cyber Security Program" INTRODUCTION AND OBJECTIVE The Naval Reactors Program (Naval Reactors), an organization within the National Nuclear Security Administration, provides the military with safe and reliable nuclear propulsion plants to power warships and submarines. Naval Reactors maintains responsibility for activities supporting the United States Naval fleet nuclear propulsion systems, including research and

23

Comparative naval architecture analysis of diesel submarines  

E-Print Network (OSTI)

Many comparative naval architecture analyses of surface ships have been performed, but few published comparative analyses of submarines exist. Of the several design concept papers, reports and studies that have been written ...

Torkelson, Kai Oscar

2005-01-01T23:59:59.000Z

24

The dynamics of naval resource allocation  

Science Conference Proceedings (OSTI)

Naval policy planning requires viewing the entire spectrum of annual resource allocation, over a long period. Emerging research into the trade offs between force asset levels and fund flows to support those assets is described. The method underlying ...

Rolf Clark

1981-01-01T23:59:59.000Z

25

EA-0531: Proposed Natural Gas Protection Program for Naval Oil...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

1: Proposed Natural Gas Protection Program for Naval Oil Shale Reserves Nos. 1 and 3, Garfield County, Colorado EA-0531: Proposed Natural Gas Protection Program for Naval Oil Shale...

26

The Naval Petroleum and Oil Shale Reserves | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

The Naval Petroleum and Oil Shale Reserves The Naval Petroleum and Oil Shale Reserves To ensure sufficient fuel for the fleet, the Government began withdrawing probable oil-bearing...

27

Title 10, Chapter 641 Pertaining to Naval Petroleum Reserves in U.S.C. |  

NLE Websites -- All DOE Office Websites (Extended Search)

Title 10, Chapter 641 Pertaining to Naval Petroleum Reserves in Title 10, Chapter 641 Pertaining to Naval Petroleum Reserves in U.S.C. Title 10, Chapter 641 Pertaining to Naval Petroleum Reserves in U.S.C. CITE: 10USC7420 CHAPTER 641--NAVAL PETROLEUM RESERVES CITE: 10USC7421 CHAPTER 641--NAVAL PETROLEUM RESERVES CITE: 10USC7422 CHAPTER 641--NAVAL PETROLEUM RESERVES CITE: 10USC7423 CHAPTER 641--NAVAL PETROLEUM RESERVES CITE: 10USC7424 CHAPTER 641--NAVAL PETROLEUM RESERVES CITE: 10USC7425 CHAPTER 641--NAVAL PETROLEUM RESERVES CITE: 10USC7427 CHAPTER 641--NAVAL PETROLEUM RESERVES CITE: 10USC7428 CHAPTER 641--NAVAL PETROLEUM RESERVES CITE: 10USC7429 CHAPTER 641--NAVAL PETROLEUM RESERVES CITE: 10USC7430 CHAPTER 641--NAVAL PETROLEUM RESERVES CITE: 10USC7431 CHAPTER 641--NAVAL PETROLEUM RESERVES CITE: 10USC7432 CHAPTER 641--NAVAL PETROLEUM RESERVES

28

Yangtze Patrol: American Naval Forces in China  

E-Print Network (OSTI)

Yangtze Patrol: American Naval Forces in China A Selected, Partially-Annotated Bibliography literature of the United States Navy in China. mvh #12;"Like Chimneys in Summer" The thousands of men who served on the China Station before World War II have been all but forgotten, except in the mythology

29

Fuel Cell Power Plant Experience Naval Applications  

NLE Websites -- All DOE Office Websites (Extended Search)

clean clean Fuel Cell Power Plant Experience Naval Applications US Department of Energy/ Office of Naval Research Shipboard Fuel Cell Workshop Washington, DC March 29, 2011 FuelCell Energy, the FuelCell Energy logo, Direct FuelCell and "DFC" are all registered trademarks (®) of FuelCell Energy, Inc. *FuelCell Energy, Inc. *Renewable and Liquid Fuels Experience *HTPEM Fuel Cell Stack for Shipboard APU *Solid Oxide Experience and Applications DOE-ONR Workshop FuelCell Energy, the FuelCell Energy logo, Direct FuelCell and "DFC" are all registered trademarks (®) of FuelCell Energy, Inc. FuelCell Energy, Inc. * Premier developer of fuel cell technology - founded in 1969 * Over 50 power installations in North America, Europe, and Asia * Industrial, commercial, utility

30

Using Radar Wind Observations to Improve Mesoscale Numerical Weather Prediction  

Science Conference Proceedings (OSTI)

A high-resolution radar data assimilation system is presented for high-resolution numerical weather prediction models. The system is under development at the Naval Research Laboratory for the Navys Coupled OceanAtmosphere Mesoscale Prediction ...

Qingyun Zhao; John Cook; Qin Xu; Paul R. Harasti

2006-08-01T23:59:59.000Z

31

Distributed energy resources at naval base ventura county building 1512  

E-Print Network (OSTI)

up by a DER system. Distributed Energy Resources at NavalFebruary 2003. Distributed Energy Resources in Practice: ARyan. January 2004. Distributed Energy Resources Customer

Bailey, Owen C.; Marnay, Chris

2004-01-01T23:59:59.000Z

32

DOE - Office of Legacy Management -- Naval Oil Shale Reserves...  

NLE Websites -- All DOE Office Websites (Extended Search)

Oil Shale Reserves Site - 013 FUSRAP Considered Sites Site: Naval Oil Shale Reserves Site (013 ) Designated Name: Alternate Name: Location: Evaluation Year: Site Operations: Site...

33

More About NNSA's Naval Reactors Office | National Nuclear Security...  

National Nuclear Security Administration (NNSA)

to skip to the main content Facebook Flickr RSS Twitter YouTube More About NNSA's Naval Reactors Office | National Nuclear Security Administration Our Mission Managing the...

34

13.400 Introduction to Naval Architecture, Fall 2004  

E-Print Network (OSTI)

Introduction to principles of naval architecture, ship geometry, hydrostatics, calculation and drawing of curves of form, intact and damaged stability, hull structure strength calculations and ship resistance. Projects ...

Herbein, David

35

Naval Reserve Force : cost and benefit analysis of reducing the number of Naval Surface Reserve Force operating budget holders ; .  

E-Print Network (OSTI)

??The Quadrennial Defense Review 1997 recommended reductions of civilian and military personnel associated with infrastructure. The Naval Reserve Force is aggressively pursuing options to reduce (more)

Young, Eric Coy

1997-01-01T23:59:59.000Z

36

Geothermal energy at Long Beach Naval Shipyard and Naval Station and at Seal Beach Naval Weapons Station, California. Final Report 1  

DOE Green Energy (OSTI)

The purpose of this project was to determine and evaluate sources of geothermal energy at two military bases in southern California, the Long Beach Naval Shipyard and Naval Station and the Seal Beach Naval Weapons Station. One part of the project focused on the natural geothermal characteristics beneath the naval bases. Another part focused on the geothermal energy produced by oilfield operations on and adjacent to each base. Results of the study are presented here for the US Department of the Navy to use in its program to reduce its reliance on petroleum by the development of different sources of energy. The project required research of various reports and data, both published and unpublished, particularly those of the California Department of Conservation, Division of Oil and Gas and of oil companies with leases on or adjacent to the naval bases. Important field investigations included the measurement of well-head temperatures of fluids produced from selected oil wells at each naval base and a detailed gravity survey of the Seal Beach naval base and vicinity. The well-head temperatures were needed to evaluate individual wells as sources of geothermal energy, while the gravity survey attempted to discover subsurface geologic structures that might contain geothermal fluids of temperatures higher than those predicted by the regional geothermal conditions.

Higgins, C.T.; Chapman, R.H.

1984-01-01T23:59:59.000Z

37

Success Story: Naval Medical Center San Diego Co-Generation Project...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Success Story: Naval Medical Center San Diego Co-Generation Project Success Story: Naval Medical Center San Diego Co-Generation Project Presentation covers the FUPWG Fall Meeting,...

38

A Tabu Search Heuristic for Resource Management in Naval Warfare  

Science Conference Proceedings (OSTI)

Effective utilization of scarce resources, in particular weapon resources, is a prominent issue in naval anti-air warfare. In this paper, defence plans are constructed to guide the allocation and scheduling of different types of defence weapons against ... Keywords: defence plan, naval warfare, resource management, tabu search, weapon

Dale E. Blodgett; Michel Gendreau; Franois Guertin; Jean-Yves Potvin; Ren Sguin

2003-03-01T23:59:59.000Z

39

Naval Spent Fuel Rail Shipment Accident Exercise Objectives  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

NAVAL SPENT FUEL RAIL SHIPMENT NAVAL SPENT FUEL RAIL SHIPMENT ACCIDENT EXERCISE OBJECTIVES * Familiarize stakeholders with the Naval spent fuel ACCIDENT EXERCISE OBJECTIVES Familiarize stakeholders with the Naval spent fuel shipping container characteristics and shipping practices * Gain understanding of how the NNPP escorts who accompany the spent fuel shipments will interact with civilian emergency services representatives g y p * Allow civilian emergency services agencies the opportunity to evaluate their response to a pp y p simulated accident * Gain understanding of how the communications links that would be activated in an accident involving a Naval spent fuel shipment would work 1 NTSF May 11 ACCIDENT EXERCISE TYPICAL TIMELINE * Conceptual/Organizational Meeting - April 6 E R T i d it t t d TYPICAL TIMELINE

40

Integrated Surface Geophysical Methods for Characterization of the Naval  

Open Energy Info (EERE)

Integrated Surface Geophysical Methods for Characterization of the Naval Integrated Surface Geophysical Methods for Characterization of the Naval Air Warfare Center, New Jersey Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Integrated Surface Geophysical Methods for Characterization of the Naval Air Warfare Center, New Jersey Author USGS Published Publisher Not Provided, 2013 DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Integrated Surface Geophysical Methods for Characterization of the Naval Air Warfare Center, New Jersey Citation USGS. Integrated Surface Geophysical Methods for Characterization of the Naval Air Warfare Center, New Jersey [Internet]. 2013. [updated 2013/01/03;cited 2013/11/22]. Available from: http://water.usgs.gov/ogw/bgas/toxics/NAWC-surface.html

Note: This page contains sample records for the topic "numerous naval propulsor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Naval Petroleum Reserve No. 3 Disposition Decision Analysis and Timeline  

Energy.gov (U.S. Department of Energy (DOE))

This Report to Congress provides a summary of the analysis supporting DOE's determination to dispose of the Naval Petroleum Reserve No. 3 through sale of all right, title, interest on the open market.

42

Distributed energy resources at naval base ventura county building 1512  

E-Print Network (OSTI)

the affects of energy prices and tariff structures on energythe default SCE tariff, total energy bills for Building 1512$0.1097. This tariff Distributed Energy Resources at Naval

Bailey, Owen C.; Marnay, Chris

2004-01-01T23:59:59.000Z

43

Distributed energy resources at naval base ventura county building 1512  

E-Print Network (OSTI)

the prices of electricity and gas, that might make PV costprices increase by 10% Distributed Energy Resources at Naval Base Ventura Country Building 1512 over current Public Works levels, then PV

Bailey, Owen C.; Marnay, Chris

2004-01-01T23:59:59.000Z

44

Numerical Modeling of an Orographically Enhanced Precipitation Event Associated with Tropical Storm Rachel over Taiwan  

Science Conference Proceedings (OSTI)

An orographic rainfall event that occurred on 67 August 1999 during the passage of Tropical Storm (TS) Rachel over Taiwan is investigated by performing triply nested, nonhydrostatic numerical simulations using the Naval Research Laboratory's (...

Sen Chiao; Yuh-Lang Lin

2003-04-01T23:59:59.000Z

45

Naval Spent Nuclear Fuel disposal Container System Description Document  

Science Conference Proceedings (OSTI)

The Naval Spent Nuclear Fuel Disposal Container System supports the confinement and isolation of waste within the Engineered Barrier System of the Monitored Geologic Repository (MGR). Disposal containers/waste packages are loaded and sealed in the surface waste handling facilities, transferred underground through the access drifts using a rail mounted transporter, and emplaced in emplacement drifts. The Naval Spent Nuclear Fuel Disposal Container System provides long term confinement of the naval spent nuclear fuel (SNF) placed within the disposal containers, and withstands the loading, transfer, emplacement, and retrieval operations. The Naval Spent Nuclear Fuel Disposal Container System provides containment of waste for a designated period of time and limits radionuclide release thereafter. The waste package maintains the waste in a designated configuration, withstands maximum credible handling and rockfall loads, limits the waste form temperature after emplacement, resists corrosion in the expected handling and repository environments, and provides containment of waste in the event of an accident. Each naval SNF disposal container will hold a single naval SNF canister. There will be approximately 300 naval SNF canisters, composed of long and short canisters. The disposal container will include outer and inner cylinder walls and lids. An exterior label will provide a means by which to identify a disposal container and its contents. Different materials will be selected for the waste package inner and outer cylinders. The two metal cylinders, in combination with the Emplacement Drift System, drip shield, and the natural barrier will support the design philosophy of defense-in-depth. The use of materials with different properties prevents a single mode failure from breaching the waste package. The inner cylinder and inner cylinder lids will be constructed of stainless steel while the outer cylinder and outer cylinder lids will be made of high-nickel alloy.

N. E. Pettit

2001-07-13T23:59:59.000Z

46

Audit Report - Naval Reactors Information Technology System Development Efforts, IG-0879  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Naval Reactors Information Naval Reactors Information Technology System Development Efforts DOE/IG-0879 December 2012 U.S. Department of Energy Office of Inspector General Office of Audits & Inspections Department of Energy Washington, DC 20585 December 21, 2012 MEMORANDUM FOR THE ADMINISTRATOR, NATIONAL NUCLEAR SECURITY ADMINISTRATION FROM: Gregory H. Friedman Inspector General SUBJECT: INFORMATION: Audit Report on the "Naval Reactors Information Technology System Development Efforts" INTRODUCTION AND OBJECTIVE The Naval Reactors Program (Naval Reactors), an organization within the National Nuclear Security Administration, was established to provide the military with safe and reliable nuclear propulsion plants to power warships and submarines. Naval Reactors maintains responsibility

47

DOE - Office of Legacy Management -- Norfolk Naval Station - VA 05  

NLE Websites -- All DOE Office Websites (Extended Search)

Norfolk Naval Station - VA 05 Norfolk Naval Station - VA 05 FUSRAP Considered Sites Site: NORFOLK NAVAL STATION (VA.05) Eliminated from consideration under FUSRAP Designated Name: Not Designated Alternate Name: None Location: Norfolk , Virginia VA.05-1 Evaluation Year: 1993 VA.05-1 Site Operations: Demonstration of extinguishing a uranium fire at the Fire Fighters School for AEC contractors. VA.05-3 VA.05-2 Site Disposition: Eliminated - Potential for contamination considered remote based on the limited quantity of materials handled VA.05-1 Radioactive Materials Handled: Yes Primary Radioactive Materials Handled: Uranium VA.05-2 Radiological Survey(s): Yes - Health and Safety Monitoring during operations only VA.05-2 Site Status: Eliminated from consideration under FUSRAP

48

Tag: Naval Reactors | Y-12 National Security Complex  

NLE Websites -- All DOE Office Websites (Extended Search)

Naval Reactors Naval Reactors Tag: Naval Reactors Displaying 1 - 7 of 7... Category: Employees & Retirees "Cook"ing at Y-12 for 70 years We have an enduring mission. Y-12 plays a key role in it. And a nuclear deterrent remains the ultimate insurance policy for America. More... Category: News Y-12 Knows Uranium Y-12 produces many forms of uranium. More... Category: News A Rich Resource Requires Recovery Given the value and scarcity of enriched uranium, Y-12 recycles and reuses as much of it as possible. More... Category: News Seawolf Manufacturing Challenge For decades, attack submarines were either fast or quiet - but never both. The fast subs were so loud that an enemy could hear them long before they were within striking distance. More... Category: News Reliable fuel source

49

NAVAL POSTGRADUATE SCHOOL ACADEMIC CATALOG 7 JUNE 2013 Quick Facts..............................................................................................................................................................4  

E-Print Network (OSTI)

NAVAL POSTGRADUATE SCHOOL ACADEMIC CATALOG ­ 7 JUNE 2013 1 CONTENTS Quick Facts......................................................................................................................................................26 #12;NAVAL POSTGRADUATE SCHOOL ACADEMIC CATALOG ­ 7 JUNE 2013 2 Curriculum Listing...............................................................................................................................................428 Energy Core Group

50

NAVAL POSTGRADUATE SCHOOL ACADEMIC CATALOG 3 JAN 2013 Quick Facts..............................................................................................................................................................4  

E-Print Network (OSTI)

NAVAL POSTGRADUATE SCHOOL ACADEMIC CATALOG ­ 3 JAN 2013 1 CONTENTS Quick Facts......................................................................................................................................................26 #12;NAVAL POSTGRADUATE SCHOOL ACADEMIC CATALOG ­ 3 JAN 2013 2 Curriculum Listing ................................................................................................427 Energy Core Group

51

NAVAL POSTGRADUATE SCHOOL ACADEMIC CATALOG 8 MARCH 2013 Quick Facts..............................................................................................................................................................4  

E-Print Network (OSTI)

NAVAL POSTGRADUATE SCHOOL ACADEMIC CATALOG ­ 8 MARCH 2013 1 CONTENTS Quick Facts......................................................................................................................................................26 #12;NAVAL POSTGRADUATE SCHOOL ACADEMIC CATALOG ­ 8 MARCH 2013 2 Curriculum Listing ................................................................................................428 Energy Core Group

52

Naval petroleum and oil shale reserves: Annual report of operations, FY 1987  

SciTech Connect

Production and reserves, development and exploration, revenues and expenditures, sales, environment and safety, and litigation are discussed for naval petroleum reserves numbers one through three and for naval oil shale reserves. 28 figs., 21 tabs. (ACT)

Not Available

1987-01-01T23:59:59.000Z

53

NPS-SCAT electrical power system ; Naval Postgraduate School Solar Cell Array Tester .  

E-Print Network (OSTI)

??The Naval Postgraduate School Solar Cell Array Tester (NPS-SCAT) seeks to expand the CubeSat knowledge base and provide learning possibilities at the Naval Postgraduate School. (more)

Dorn, Lawrence Tyrone.

2009-01-01T23:59:59.000Z

54

FY 2012 Budget Hearing Testimony on Nuclear Nonproliferation and Naval  

NLE Websites -- All DOE Office Websites (Extended Search)

on Nuclear Nonproliferation and Naval on Nuclear Nonproliferation and Naval Reactor Programs before the House Appropriations Committee, Energy and Water Development Subcommittee | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > Media Room > Congressional Testimony > FY 2012 Budget Hearing Testimony on Nuclear ...

55

Statement on Defense Nuclear Nonproliferation and Naval Reactors Activities  

NLE Websites -- All DOE Office Websites (Extended Search)

Defense Nuclear Nonproliferation and Naval Reactors Activities Defense Nuclear Nonproliferation and Naval Reactors Activities before the House Committee on Appropriations Subcommittee on Energy & Water Development | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > Media Room > Congressional Testimony > Statement on Defense Nuclear

56

FY 2012 Budget Hearing Testimony on Nuclear Nonproliferation and Naval  

National Nuclear Security Administration (NNSA)

on Nuclear Nonproliferation and Naval on Nuclear Nonproliferation and Naval Reactor Programs before the House Appropriations Committee, Energy and Water Development Subcommittee | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > Media Room > Congressional Testimony > FY 2012 Budget Hearing Testimony on Nuclear ...

57

Statement on Defense Nuclear Nonproliferation and Naval Reactors Activities  

National Nuclear Security Administration (NNSA)

Defense Nuclear Nonproliferation and Naval Reactors Activities Defense Nuclear Nonproliferation and Naval Reactors Activities before the House Committee on Appropriations Subcommittee on Energy & Water Development | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > Media Room > Congressional Testimony > Statement on Defense Nuclear

58

A Numerical Investigation of the Effects of Timing of Diabatic Processes in the Coastal Cyclogenesis of GALE IOP 2  

Science Conference Proceedings (OSTI)

Sensitivity of coastal cyclogenesis to the effects of timing of diabatic processes is investigated using the Naval Research Laboratory mesoscale model. Numerical experiments were conducted to examine the sensitivity of the intensification and ...

Teddy R. Holt; Simon W. Chang

1993-04-01T23:59:59.000Z

59

Distributed Energy Resources at Naval Base Ventura County Building 1512  

E-Print Network (OSTI)

LBNL-55340 Distributed Energy Resources at Naval Base Ventura County Building 1512 Prepared, of the U.S. Department of Energy under Contract No. DE-AC03-76SF00098. #12;Distributed Energy Resources and the Distributed Energy Program of DOE also provided prior funding to develop and validate the DER-CAM model

60

Estimating the Economic Benefits of Forward-Engaged Naval Forces  

Science Conference Proceedings (OSTI)

In preparing for the 1997 quadrennial defense review, US Navy leaders asked us if we could quantify the economic benefits of forward-engaged naval forces and communicate them to policy makers. Until this point, the only evidence of such benefits was ... Keywords: INDUSTRIES--PETROLEUM-NATURAL GAS, MILITARY--COST EFFECTIVENESS

Robert E. Looney; David A. Schrady; Ronald L. Brown

2001-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "numerous naval propulsor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Approved for public release; distribution is unlimited. NAVAL POSTGRADUATE SCHOOL  

E-Print Network (OSTI)

1995 Thesis Advisor: Michael J. Zyda Thesis Co-Advisor: John S. Falby #12;Public reporting burden-18 REPORT DOCUMENTATION PAGE Form Approved OMB No. 0704-0188 1. AGENCY USE ONLY (Leave Blank) 2. REPORT DATEApproved for public release; distribution is unlimited. THESIS NAVAL POSTGRADUATE SCHOOL Monterey

Zyda, Michael

62

Numerical Ocean Prediction ModelsGoal for the 1980s  

Science Conference Proceedings (OSTI)

Based on the experience of numerical weather prediction during the 1950s and 1960s as a model, a case is presented for the development of an ocean prediction capability during the 1980s. Examples selected from recent research at the Naval ...

Russell L. Elsberry; Roland W. Garwood Jr.

1980-12-01T23:59:59.000Z

63

DOE - Office of Legacy Management -- Naval Research Laboratory - DC 02  

Office of Legacy Management (LM)

Research Laboratory - DC 02 Research Laboratory - DC 02 FUSRAP Considered Sites Site: NAVAL RESEARCH LABORATORY (DC.02 ) Eliminated from consideration under FUSRAP - Referred to DOD Designated Name: Not Designated Alternate Name: None Location: Washington , D.C. DC.02-4 Evaluation Year: 1987 DC.02-4 Site Operations: Research and development on thermal diffusion. DC.02-4 Site Disposition: Eliminated - No Authority - AEC licensed - Military facility DC.02-4 DC.02-1 Radioactive Materials Handled: Yes Primary Radioactive Materials Handled: Uranium, Thorium DC.02-2 DC.02-3 Radiological Survey(s): None Indicated Site Status: Eliminated from consideration under FUSRAP - Referred to DOD DC.02-4 Also see Documents Related to NAVAL RESEARCH LABORATORY DC.02-1 - AEC Memorandum and Source Material License No. C-3393;

64

Naval Construction Battalion Center Gulfport - Mississippi Power Partnership Success Story  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Construction Battalion Center Construction Battalion Center Gulfport - Mississippi Power Partnership Success Story Utilities Hardening Project Joe Bosco May 5, 2009 May 5, 2009 * Naval Construction Battalion Center * Established 1942 - Gulfport * Home of Atlantic Fleet Seabees Home of Atlantic Fleet Seabees * Mission: Prepare for & support all facets of the mobilization of construction forces * Naval Construction Battalion Center * 1,100 Acres * 9+ MVA; $3M/yr in Electricity 9+ MVA; $3M/yr in Electricity * One of two Battalion Centers in U.S. * Economic Impact - $500M Mississippi Power Company * Headquartered - Gulfport * Subsidiary y of Southern Comp pany y * Serves 23 counties Southeast Mississippi * 192,000 retail customers * * Generating capacity: 3 166 192 kW Generating capacity: 3,166,192 kW

65

NAVAL REACTORS PHYSICS HANDBOOK. VOLUME I. SELECTED BASIC TECHNIQUES  

SciTech Connect

The purpose of this work is to present the most pertinent parts of the body of physics knowledge which has been built up in the course of the Naval and Shippingport (PWR) Reactor Programs, with the aim of providing a background of understanding for those interested in nuclear core design. Volume 1 of this handbook was planned to bring together topics in the basic theoretical and experimental material which are of especially wide interest, including those common to both thermal and intermediate neutron energy reactor types. The physics design of light water-moderated and -cooled reactors is covered in Volume 2 (classified), and that of intermediate neutron-energy power reactors in Volume 3. The emphasis in Volume 1 is thus on light water reactor systems, and as many recent advances in reactor physics of the Naval and Shippingport Reactor Programs as possible have been included.

Radkowsky, A. ed.

1964-01-01T23:59:59.000Z

66

United States Naval Surface Warfare Center | Open Energy Information  

Open Energy Info (EERE)

Naval Surface Warfare Center Naval Surface Warfare Center Jump to: navigation, search Hydro | Hydrodynamic Testing Facilities Name United States Naval Surface Warfare Center Address Carderock, 9500 MacArthur Boulevard West Place Bethesda, Maryland Zip 20817 Sector Hydro Phone number (301) 227-1574 Website http://www.dt.navy.mil/hyd/fac Coordinates 38.9782231°, -77.1973878° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":38.9782231,"lon":-77.1973878,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

67

1996 environmental monitoring report for the Naval Reactors Facility  

Science Conference Proceedings (OSTI)

The results of the radiological and nonradiological environmental monitoring programs for 1996 at the Naval Reactors Facility (NRF) are presented in this report. The NRF is located on the Idaho National Engineering and Environmental Laboratory and contains three naval reactor prototypes and the Expended Core Facility, which examines developmental nuclear fuel material samples, spent naval fuel, and irradiated reactor plant components/materials. The results obtained from the environmental monitoring programs verify that releases to the environment from operations at NRF were in accordance with state and federal regulations. Evaluation of the environmental data confirms that the operation of NRF continues to have no adverse effect on the quality of the environment or the health and safety of the general public. Furthermore, a conservative assessment of radiation exposure to the general public as a result of NRF operations demonstrated that the dose received by any member of the public was well below the most restrictive dose limits prescribed by the Environmental Protection Agency (EPA) and the Department of Energy (DOE).

NONE

1996-12-31T23:59:59.000Z

68

Naval Petroleum and Oil Shale Reserves annual report of operations for fiscal year 1996  

SciTech Connect

During fiscal year 1996, the Department of Energy continued to operate Naval Petroleum Reserve No. 1 in California and Naval Petroleum Reserve No. 3 in Wyoming through its contractors. In addition, natural gas operations were conducted at Naval Petroleum Reserve No. 3. All productive acreage owned by the Government at Naval Petroleum Reserve No. 2 in California was produced under lease to private companies. The locations of all six Naval Petroleum and Oil Shale Reserves are shown in a figure. Under the Naval Petroleum Reserves Production Act of 1976, production was originally authorized for six years, and based on findings of national interest, the President was authorized to extend production in three-year increments. President Reagan exercised this authority three times (in 1981, 1984, and 1987) and President Bush authorized extended production once (in 1990). President Clinton exercised this authority in 1993 and again in October 1996; production is presently authorized through April 5, 2000. 4 figs. 30 tabs.

1996-12-31T23:59:59.000Z

69

U.S. Department Of Energy Naval Reactors Laboratory Field Office  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Of Energy Naval Reactors Laboratory Field Office Knolls Laboratory National Environmental Policy Act (NEPA) Categorical Exclusion (CX) Determination Summary Form BUILDING A10...

70

NAVAL POSTGRADUATE SCHOOL ACADEMIC CATALOG 7 JUNE 2013 Quick Facts..............................................................................................................................................................4  

E-Print Network (OSTI)

NAVAL POSTGRADUATE SCHOOL ACADEMIC CATALOG ­ 7 JUNE 2013 1 CONTENTS Quick Facts...............................................................................................................................................435 Energy Core Group .............................................................................................................................................438 Certificate in Defense Energy - Curriculum 234

71

Distributed Energy Resources at Naval Base Ventura County Building 1512: A Sensitivity Analysis  

E-Print Network (OSTI)

Naval Base Ventura County Standby Generator Optimization20 Figure 7: Standby Charge Sensitivity Separate24 Figure 11: Standby Charge Sensitivity Analysis

Bailey, Owen C.; Marnay, Chris

2005-01-01T23:59:59.000Z

72

Naval Petroleum and Oil Shale Reserves. Annual report of operations, Fiscal year 1992  

SciTech Connect

During fiscal year 1992, the reserves generated $473 million in revenues, a $181 million decrease from the fiscal year 1991 revenues, primarily due to significant decreases in oil and natural gas prices. Total costs were $200 million, resulting in net cash flow of $273 million, compared with $454 million in fiscal year 1991. From 1976 through fiscal year 1992, the Naval Petroleum and Oil Shale Reserves generated more than $15 billion in revenues and a net operating income after costs of $12.5 billion. In fiscal year 1992, production at the Naval Petroleum Reserves at maximum efficient rates yielded 26 million barrels of crude oil, 119 billion cubic feet of natural gas, and 164 million gallons of natural gas liquids. From April to November 1992, senior managers from the Naval Petroleum and Oil Shale Reserves held a series of three workshops in Boulder, Colorado, in order to build a comprehensive Strategic Plan as required by Secretary of Energy Notice 25A-91. Other highlights are presented for the following: Naval Petroleum Reserve No. 1--production achievements, crude oil shipments to the strategic petroleum reserve, horizontal drilling, shallow oil zone gas injection project, environment and safety, and vanpool program; Naval Petroleum Reserve No. 2--new management and operating contractor and exploration drilling; Naval Petroleum Reserve No. 3--steamflood; Naval Oil Shale Reserves--protection program; and Tiger Team environmental assessment of the Naval Petroleum and Oil Shale Reserves in Colorado, Utah, and Wyoming.

1992-12-31T23:59:59.000Z

73

Fallon Naval Air Station Geothermal Area | Open Energy Information  

Open Energy Info (EERE)

Page Page Edit with form History Facebook icon Twitter icon » Fallon Naval Air Station Geothermal Area Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermal Resource Area: Fallon Naval Air Station Geothermal Area Contents 1 Area Overview 2 History and Infrastructure 3 Regulatory and Environmental Issues 4 Exploration History 5 Well Field Description 6 Geology of the Area 7 Geofluid Geochemistry 8 NEPA-Related Analyses (0) 9 Exploration Activities (0) 10 References Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"TERRAIN","zoom":6,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"500px","height":"300px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":39.38,"lon":-118.65,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

74

EA-0531: Proposed Natural Gas Protection Program for Naval Oil Shale  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

31: Proposed Natural Gas Protection Program for Naval Oil 31: Proposed Natural Gas Protection Program for Naval Oil Shale Reserves Nos. 1 and 3, Garfield County, Colorado EA-0531: Proposed Natural Gas Protection Program for Naval Oil Shale Reserves Nos. 1 and 3, Garfield County, Colorado SUMMARY This EA evaluates the environmental impacts of a proposal for a Natural Gas Protection Program for Naval Oil Shale Reserves Nos. 1 and 3 which would be implemented over a five-year period that would encompass a total of 200 wells in Garfield County, Colorado. PUBLIC COMMENT OPPORTUNITIES None available at this time. DOCUMENTS AVAILABLE FOR DOWNLOAD August 9, 1991 EA-0531: Final Environmental Assessment Proposed Natural Gas Protection Program for Naval Oil Shale Reserves Nos. 1 and 3 August 9, 1991 EA-0531: Finding of No Significant Impact

75

Commander, Naval Base ATTN: Ms. Cheryl Barnett Building N-26  

Office of Legacy Management (LM)

.J>?j 1.2 1990 .J>?j 1.2 1990 Commander, Naval Base ATTN: Ms. Cheryl Barnett Building N-26 Code N 9 E Norfolk, Virginia 23511-6002 Dear Ms. Barnett: I enjoyed speaking with you on the phone. The Department of Energy (DOE) has established its Formerly Utilized Sites Remedial Action Program (FUSRAP) to identify sites formerly utilized by its predecessor agencies in the early days of the nation's atomic energy program and to determine the potential for these sites to contain radiological contamination, related to DOE's past activities, which may require remedial action. When necessary, radiological surveys of individual sites are performed to provide the data necessary to make this necessary determination. As we discussed, in July 1956, the Atomic Energy Commission (a DOE

76

Naval Reactors Facility environmental monitoring report, calendar year 2001  

Science Conference Proceedings (OSTI)

The results of the radiological and nonradiological environmental monitoring programs for 2001 at the Naval Reactors Facility are presented in this report. The results obtained from the environmental monitoring programs verify that releases to the environment from operations at NRF were in accordance with Federal and State regulations. Evaluation of the environmental data confirms that the operation of NRF continues to have no adverse effect on the quality of the environment or the health and safety of the general public. Furthermore, a conservative assessment of radiation exposure to the general public as a result of NRF operations demonstrated that the dose received by any member of the public was well below the most restrictive dose limits prescribed by the U. S. Environmental Protection Agency and the U. S. Department of Energy.

NONE

2002-12-31T23:59:59.000Z

77

Naval Reactors Facility environmental monitoring report, calendar year 1999  

Science Conference Proceedings (OSTI)

The results of the radiological and nonradiological environmental monitoring programs for 1999 at the Naval Reactors Facility (NRF) are presented in this report. The results obtained from the environmental monitoring programs verify that releases to the environment from operations at NRF were in accordance with Federal and State regulations. Evaluation of the environmental data confirms that the operation of NRF continues to have no adverse effect on the quality of the environment or the health and safety of the general public. Furthermore, a conservative assessment of radiation exposure to the general public as a result of NRF operations demonstrated that the dose received by any member of the public was well below the most restrictive dose limits prescribed by the U.S. Environmental Protection Agency (EPA) and the U.S. Department of Energy (DOE).

None

2000-12-01T23:59:59.000Z

78

Naval Reactors Facility environmental monitoring report, calendar year 2000  

Science Conference Proceedings (OSTI)

The results of the radiological and nonradiological environmental monitoring programs for 2000 at the Naval Reactors Facility (NRF) are presented in this report. The results obtained from the environmental monitoring programs verify that releases to the environment from operations at NRF were in accordance with Federal and State regulations. Evaluation of the environmental data confirms that the operation of NRF continues to have no adverse effect on the quality of the environment or the health and safety of the general public. Furthermore, a conservative assessment of radiation exposure to the general public as a result of NRF operations demonstrated that the dose received by any member of the public was well below the most restrictive dose limits prescribed by the U.S. Environmental Protection Agency (EPA) and the U.S. Department of Energy (DOE).

None

2001-12-01T23:59:59.000Z

79

Naval Reactors Facility Environmental Monitoring Report, Calendar Year 2003  

Science Conference Proceedings (OSTI)

The results of the radiological and nonradiological environmental monitoring programs for 2003 at the Naval Reactors Facility are presented in this report. The results obtained from the environmental monitoring programs verify that releases to the environment from operations at NRF were in accordance with Federal and State regulations. Evaluation of the environmental data confirms that the operation of NRF continues to have no adverse effect on the quality of the environment or the health and safety of the general public. Furthermore, a conservative assessment of radiation exposure to the general public as a result of NRF operations demonstrated that the dose received by any member of the public was well below the most restrictive dose limits prescribed by the U.S. Environmental Protection Agency and the U.S. Department of Energy.

None

2003-12-31T23:59:59.000Z

80

Request for Naval Reactors Comment on Proposed Prometheus Space Flight Nuclear Reactor High Tier Reactor Safety Requirements and for Naval Reactors Approval to Transmit These Requirements to JPL  

SciTech Connect

The purpose of this letter is to request Naval Reactors comments on the nuclear reactor high tier requirements for the PROMETHEUS space flight reactor design, pre-launch operations, launch, ascent, operation, and disposal, and to request Naval Reactors approval to transmit these requirements to Jet Propulsion Laboratory to ensure consistency between the reactor safety requirements and the spacecraft safety requirements. The proposed PROMETHEUS nuclear reactor high tier safety requirements are consistent with the long standing safety culture of the Naval Reactors Program and its commitment to protecting the health and safety of the public and the environment. In addition, the philosophy on which these requirements are based is consistent with the Nuclear Safety Policy Working Group recommendations on space nuclear propulsion safety (Reference 1), DOE Nuclear Safety Criteria and Specifications for Space Nuclear Reactors (Reference 2), the Nuclear Space Power Safety and Facility Guidelines Study of the Applied Physics Laboratory.

D. Kokkinos

2005-04-28T23:59:59.000Z

Note: This page contains sample records for the topic "numerous naval propulsor" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
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81

EA-1889: Disposal of Decommissioned, Defueled Naval Reactor Plants from USS  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

89: Disposal of Decommissioned, Defueled Naval Reactor Plants 89: Disposal of Decommissioned, Defueled Naval Reactor Plants from USS Enterprise (CVN 65) at the Hanford Site, Richland, Washington EA-1889: Disposal of Decommissioned, Defueled Naval Reactor Plants from USS Enterprise (CVN 65) at the Hanford Site, Richland, Washington Summary This EA, prepared by the Department of the Navy, evaluates the environmental impacts of the disposal of decommissioned, defueled, naval reactor plants from the USS Enterprise at DOE's Hanford Site, Richland, Washington. DOE participated as a cooperating agency in the preparation of this EA. The Department of the Navy issued its FONSI on August 23, 2012. Public Comment Opportunities No public comment opportunities available at this time. Documents Available for Download August 23, 2012

82

EA-1236: Preparation for Transfer of Ownership of Naval Petroleum Reserve  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

236: Preparation for Transfer of Ownership of Naval Petroleum 236: Preparation for Transfer of Ownership of Naval Petroleum Reserve No. 3, Natrona County, WY EA-1236: Preparation for Transfer of Ownership of Naval Petroleum Reserve No. 3, Natrona County, WY SUMMARY This EA evaluates activities that DOE would conduct in anticipation of possible transfer of Naval Petroleum Reserve No. 3 (NPR-3) out of Federal operation. Proposed activities would include accelerated plugging and abandoning of uneconomic wells, complete reclamation and restoration of abandoned sites including dismantling surface facilities, batteries, roads, test satellites, electrical distribution systems and associated power poles, when they are no longer needed for production, and the development of the Rocky Mountain Oilfield Testing Center (RMOTC).

83

Development Wells At Fallon Naval Air Station Area (Sabin, Et Al., 2010) |  

Open Energy Info (EERE)

Naval Air Station Area (Sabin, Et Al., 2010) Naval Air Station Area (Sabin, Et Al., 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Development Wells At Fallon Naval Air Station Area (Sabin, Et Al., 2010) Exploration Activity Details Location Fallon Naval Air Station Area Exploration Technique Development Wells Activity Date Usefulness not indicated DOE-funding Unknown Notes As was mentioned previously, the Navy signed a development contract with Ormat in 2005 to produce power from a potential resource on the SE corner of the main side portion of NAS Fallon. Additionally the GPO began additional exploration activities on the Bombing Range 16 in collaboration with the Great Basin Center for Geothermal Energy. The introduction of $9.1M of Recovery Act funds in early 2009 led to a broadening as well as an

84

Sale of the Elk Hills Naval Petroleum Reserve | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Services » Petroleum Reserves » Naval Reserves » Sale of the Elk Services » Petroleum Reserves » Naval Reserves » Sale of the Elk Hills Naval Petroleum Reserve Sale of the Elk Hills Naval Petroleum Reserve Energy Secretary Federico Pena (left) and Occidental Petroleum's David Hentschel sign the historic transfer agreement with Patricia Godley, DOE's Assistant Secretary for Fossil Energy, who orchestrated the sale, looking on. Energy Secretary Federico Pena (left) and Occidental Petroleum's David Hentschel sign the historic transfer agreement with Patricia Godley, DOE's Assistant Secretary for Fossil Energy, who orchestrated the sale, looking on. On February 5, 1998, the Department of Energy and Occidental Petroleum Corporation concluded the largest divestiture of federal property in the history of the U.S. government.

85

Modular machinery arrangement and its impact in early-stage naval electric ship design  

E-Print Network (OSTI)

Electrical power demands for naval surface combatants are projected to rise with the development of increasingly complex and power intensive combat systems. This trend also coincides with the need of achieving maximum fuel ...

Jurkiewicz, David J. (David James)

2012-01-01T23:59:59.000Z

86

EA-1008: Continued Development of Naval Petroleum Reserve No. 3 (Sitewide), Natrona County, Wyoming  

Energy.gov (U.S. Department of Energy (DOE))

This EA evaluates the environmental impacts of the proposal to continue development of the U.S. Department of Energy's Naval Petroleum Reserve No. 3 located in Natrona County, Wyoming over the next...

87

Development of A Mesoscale Ensemble Data Assimilation System at The Naval Research Laboratory  

Science Conference Proceedings (OSTI)

An ensemble Kalman filter (EnKF) has been adopted and implemented at the Naval Research Laboratory (NRL) for mesoscale and storm-scale data assimilation to study the impact of ensemble assimilation of high-resolution observations, including those ...

Qingyun Zhao; Fuqing Zhang; Teddy Holt; Craig H. Bishop; Qin Xu

88

Application and analysis of stiffened side shell panel failure for naval patrol craft  

E-Print Network (OSTI)

Over their lifetime, naval patrol craft are subjected to many different types of loading scenarios, most of which are perfectly safe. In rare instances, through a variety of different reasons, these craft are loaded beyond ...

Mothander, Matthew K. A., Lieutenant (Matthew Kristian Alden)

2009-01-01T23:59:59.000Z

89

Analyzing the effects of component reliability on naval Integrated Power System quality of service  

E-Print Network (OSTI)

The Integrated Power System (IPS) is a key enabling technology for future naval vessels and their advanced weapon systems. While conventional warship designs utilize separate power systems for propulsion and shipboard ...

Hawbaker, Benjamin F. (Benjamin Forrest)

2008-01-01T23:59:59.000Z

90

Southwest Division, Naval Facilities Engineering Command, Demand Side Management Program Implementation  

E-Print Network (OSTI)

This paper covers some of the major aspects of the development and execution of the Southwest Division, Naval Facilities Engineering Command (SOUTHWESTNAVFACENGCOM) Energy and Water Program. The program covers Naval and Marine facilities in 14 western states. It started from zero in 1992 and has grown to a program which has identified and is in the process of implementing energy and water savings projects totaling over $115,000,000.

Gates, G. G.

1997-04-01T23:59:59.000Z

91

Renewable Energy Optimization Report for Naval Station Newport  

DOE Green Energy (OSTI)

In 2008, the U.S. Environmental Protection Agency (EPA) launched the RE-Powering America's Land initiative to encourage the development of renewable energy (RE) on potentially contaminated land and mine sites. As part of this effort, EPA is collaborating with the U.S. Department of Energy's (DOE's) National Renewable Energy Laboratory (NREL) to evaluate RE options at Naval Station (NAVSTA) Newport in Newport, Rhode Island. NREL's Renewable Energy Optimization (REO) tool was utilized to identify RE technologies that present the best opportunity for life-cycle cost-effective implementation while also serving to reduce energy-related carbon dioxide emissions and increase the percentage of RE used at NAVSTA Newport. The technologies included in REO are daylighting, wind, solar ventilation preheating (SVP), solar water heating, photovoltaics (PV), solar thermal (heating and electric), and biomass (gasification and cogeneration). The optimal mix of RE technologies depends on several factors including RE resources; technology cost and performance; state, utility, and federal incentives; and economic parameters (discount and inflation rates). Each of these factors was considered in this analysis. Technologies not included in REO that were investigated separately per NAVSTA Newport request include biofuels from algae, tidal power, and ground source heat pumps (GSHP).

Robichaud, R.; Mosey, G.; Olis, D.

2012-02-01T23:59:59.000Z

92

NALDA (Naval Aviation Logistics Data Analysis) CAI (computer aided instruction)  

SciTech Connect

Data Systems Engineering Organization (DSEO) personnel developed a prototype computer aided instruction CAI system for the Naval Aviation Logistics Data Analysis (NALDA) system. The objective of this project was to provide a CAI prototype that could be used as an enhancement to existing NALDA training. The CAI prototype project was performed in phases. The task undertaken in Phase I was to analyze the problem and the alternative solutions and to develop a set of recommendations on how best to proceed. The findings from Phase I are documented in Recommended CAI Approach for the NALDA System (Duncan et al., 1987). In Phase II, a structured design and specifications were developed, and a prototype CAI system was created. A report, NALDA CAI Prototype: Phase II Final Report, was written to record the findings and results of Phase II. NALDA CAI: Recommendations for an Advanced Instructional Model, is comprised of related papers encompassing research on computer aided instruction CAI, newly developing training technologies, instructional systems development, and an Advanced Instructional Model. These topics were selected because of their relevancy to the CAI needs of NALDA. These papers provide general background information on various aspects of CAI and give a broad overview of new technologies and their impact on the future design and development of training programs. The paper within have been index separately elsewhere.

Handler, B.H. (Oak Ridge K-25 Site, TN (USA)); France, P.A.; Frey, S.C.; Gaubas, N.F.; Hyland, K.J.; Lindsey, A.M.; Manley, D.O. (Oak Ridge Associated Universities, Inc., TN (USA)); Hunnum, W.H. (North Carolina Univ., Chapel Hill, NC (USA)); Smith, D.L. (Memphis State Univ., TN (USA))

1990-07-01T23:59:59.000Z

93

Naval Undersea Warfare Center Division Newport utilities metering, Phase 1  

SciTech Connect

Pacific Northwest Laboratory developed this report for the US Navy`s Naval Undersea Warfare Center Division Newport, Rhode Island (NUWC). The purpose of the report was to review options for metering electricity and steam used in the NUWC compound, and to make recommendations to NUWC for implementation under a follow-on project. An additional NUWC concern is a proposed rate change by the servicing utility, Newport Electric, which would make a significant shift from consumption to demand billing, and what effect that rate change would have on the NUWC utility budget. Automated, remote reading meters are available which would allow NUWC to monitor its actual utility consumption and demand for both the entire NUWC compound and by end-use in individual buildings. Technology is available to perform the meter reads and manipulate the data using a personal computer with minimal staff requirement. This is not meant to mislead the reader into assuming that there is no requirement for routine preventive maintenance. All equipment requires routine maintenance to maintain its accuracy. While PNL reviewed the data collected during the site visit, however, it became obvious that significant opportunities exist for reducing the utility costs other than accounting for actual consumption and demand. Unit costs for both steam and electricity are unnecessarily high, and options are presented in this report for reducing them. Additionally, NUWC has an opportunity to undertake a comprehensive energy resource management program to significantly reduce its energy demand, consumption, and costs.

Carroll, D.M.

1992-11-01T23:59:59.000Z

94

Naval Undersea Warfare Center Division Newport utilities metering, Phase 1  

SciTech Connect

Pacific Northwest Laboratory developed this report for the US Navy's Naval Undersea Warfare Center Division Newport, Rhode Island (NUWC). The purpose of the report was to review options for metering electricity and steam used in the NUWC compound, and to make recommendations to NUWC for implementation under a follow-on project. An additional NUWC concern is a proposed rate change by the servicing utility, Newport Electric, which would make a significant shift from consumption to demand billing, and what effect that rate change would have on the NUWC utility budget. Automated, remote reading meters are available which would allow NUWC to monitor its actual utility consumption and demand for both the entire NUWC compound and by end-use in individual buildings. Technology is available to perform the meter reads and manipulate the data using a personal computer with minimal staff requirement. This is not meant to mislead the reader into assuming that there is no requirement for routine preventive maintenance. All equipment requires routine maintenance to maintain its accuracy. While PNL reviewed the data collected during the site visit, however, it became obvious that significant opportunities exist for reducing the utility costs other than accounting for actual consumption and demand. Unit costs for both steam and electricity are unnecessarily high, and options are presented in this report for reducing them. Additionally, NUWC has an opportunity to undertake a comprehensive energy resource management program to significantly reduce its energy demand, consumption, and costs.

Carroll, D.M.

1992-11-01T23:59:59.000Z

95

Design and cavitation performance of contra-rotating propellers  

E-Print Network (OSTI)

Improvement of the propulsive efficiency of ships has always been one of the main objectives for naval architects and marine engineers. Contra-Rotating propellers (CRP) are propulsor configurations offering higher efficiency ...

Laskos, Dimitrios

2010-01-01T23:59:59.000Z

96

Carl Vinson and pre-war naval legislation 1932-1940  

E-Print Network (OSTI)

At the end of World War I, the United States Navy was in the midst of a building program designed to make it a "Navy Second to None." However, the post-war desire to avoid involvement in another international conflict led the United States to retreat from the aggressive naval policy of President Woodrow Wilson. America initiated and supported conferences which led to the Washington Naval Treaty of 1922 and the London Naval Treaty of 1930, both of which limited the maximum strength of the world's naval powers. In addition, throughout the 1920's and early 1930's the United States failed to build up to the levels allowed by the treaties, causing the Navy to slowly age toward obsolescence. This situation changed in the period from 1933 to 1940 as Congressman Carl Vinson of Georgia, chairman of the House Naval Affairs Committee, drafted and saw to the passage of legislation designed to once again provide the United States with a powerful navy as part of a strong national defense. Vinson obtained passage of naval construction legislation in 1934, 1937, 1938, and 1940, and supported the annual and supplemental appropriation acts which funded the newly authorized construction. In doing so, Vinson overcame opposition from pacifists and isolationists in Congress who feared America would be drawn into another European war. Vinson also had to persuade fiscal conservatives opposed to increasing the budget deficit that funding naval construction was in the nation's best interests. Additionally, Vinson obtained the often reluctant support of President Franklin Roosevelt to insure final approval of his legislation. This study examines Vinson's efforts to provide the Navy the ships with which it eventually fought World War II. it looks at committee hearings, House and Senate debates, and behind the scenes conferences between Vinson and officials of the Navy Department and Roosevelt Administration which helped decide the course of naval expansion. It shows that while many people contributed passing naval construction legislation, Carl Vinson was the driving force behind the expansion of the Navy. Without Vinson's pre-war legislation, the Navy could not have been prepared to effectively fight the Second World War.

Svonavec, Stephen Charles

1994-01-01T23:59:59.000Z

97

September 10, 2003, Board Public Meeting - Naval Reactors Approach to Oversight  

NLE Websites -- All DOE Office Websites (Extended Search)

4 4 25 22 As I previously mentioned this morning, we will receive testimony from experienced representatives from other organizations. First, I would like to welcome representatives from the U.S. Naval Sea Systems Command, Mr. Thomas Beckett and Mr. Storm Kauffman. If you would be kind enough to give your names and titles so the stenographer can identify you for the record. MR. BECKETT: Thank you, Mr. Chairman. Thomas H. Beckett. I ' m the Deputy Director for Naval Reactors, a joint Department of the Navy/Department of Energy Program. MR. KAUFFMAN: Storm Kauffman. I ' m the Director of Reactor Safety and Analysis for the Naval Reactors Program CHAIRMAN CONWAY: Mr. Beckett. MR. BECKETT: Thank you, Mr. Chairman, and let me thank you and the other Board Members f

98

DOE - Office of Legacy Management -- Naval Ordnance Test Station - CA 06  

NLE Websites -- All DOE Office Websites (Extended Search)

Ordnance Test Station - CA 06 Ordnance Test Station - CA 06 FUSRAP Considered Sites Site: NAVAL ORDNANCE TEST STATION (CA.06) Eliminated from consideration under FUSRAP Designated Name: Not Designated Alternate Name: China Lake Naval Weapons Center Salt Wells Pilot Plant CA.06-1 Location: Inyokern , California CA.06-1 Evaluation Year: 1987 CA.06-1 Site Operations: Naval facility; experimental development work on shape charges and quality castings on a pilot plant scale. CA.06-1 Site Disposition: Eliminated - No indication that radioactive materials were handled at the site CA.06-1 Radioactive Materials Handled: None Indicated CA.06-1 Primary Radioactive Materials Handled: None CA.06-1 Radiological Survey(s): No Site Status: Eliminated from consideration under FUSRAP Also see

99

This document was downloaded on May 22, 2013 at 14:23:58 Author(s) Naval Postgraduate School (U.S.)  

E-Print Network (OSTI)

Selection Procedures 20 Naval Officers 20 Other U.S. Military Officers 20 International Students 20 Civilian

100

Analysis of operating alternatives for the Naval Computer and Telecommunications Station Cogeneration Facility at Naval Air Station North Island, San Diego, California  

SciTech Connect

The Naval Facilities Engineering Command Southwestern Division commissioned Pacific Northwest Laboratory (PNL), in support of the US Department of Energy (DOE) Federal Energy Management Program (FEMP), to determine the most cost-effective approach to the operation of the cogeneration facility in the Naval Computer and Telecommunications Station (NCTS) at the Naval Air Station North Island (NASNI). Nineteen alternative scenarios were analyzed by PNL on a life-cycle cost basis to determine whether to continue operating the cogeneration facility or convert the plant to emergency-generator status. This report provides the results of the analysis performed by PNL for the 19 alternative scenarios. A narrative description of each scenario is provided, including information on the prime mover, electrical generating efficiency, thermal recovery efficiency, operational labor, and backup energy strategy. Descriptions of the energy and energy cost analysis, operations and maintenance (O&M) costs, emissions and related costs, and implementation costs are also provided for each alternative. A summary table presents the operational cost of each scenario and presents the result of the life-cycle cost analysis.

Parker, S.A.; Carroll, D.M.; McMordie, K.L.; Brown, D.R.; Daellenbach, K.K.; Shankle, S.A.; Stucky, D.J.

1993-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "numerous naval propulsor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Implementation plan for operating alternatives for the Naval Computer and Telecommunications Station cogeneration facility at Naval Air Station North Island, San Diego, California  

SciTech Connect

The goal of the US Department of Energy (DOE) Federal Energy Management Program (FEMP) is to facilitate energy efficiency improvements at federal facilities. This is accomplished by a balanced program of technology development, facility assessment, and use of cost-sharing procurement mechanisms. Technology development focuses upon the tools, software, and procedures used to identify and evaluate energy efficiency technologies and improvements. For facility assessment, FEMP provides metering equipment and trained analysts to federal agencies exhibiting a commitment to improve energy use efficiency. To assist in procurement of energy efficiency measures, FEMP helps federal agencies devise and implement performance contracting and utility demand-side management strategies. Pacific Northwest Laboratory (PNL) supports the FEMP mission of energy systems modernization. Under this charter, the Laboratory and its contractors work with federal facility energy managers to assess and implement energy efficiency improvements at federal facilities nationwide. The SouthWestern Division of the Naval Facilities Engineering Command, in cooperation with FEMP, has tasked PNL with developing a plan for implementing recommended modifications to the Naval Computer and Telecommunications Station (NCTS) cogeneration plant at the Naval Air Station North Island (NASNI) in San Diego. That plan is detailed in this report.

Carroll, D.M.; Parker, S.A.; Stucky, D.J.

1994-04-01T23:59:59.000Z

102

This document was downloaded on May 22, 2013 at 14:29:51 Author(s) Naval Postgraduate School (U.S.)  

E-Print Network (OSTI)

- graduate School a naval university, un- ified in policy, procedure and purpose. In addition to its Naval PROCEDURES U.S. NAVAL OFFICERS U.S. Navy officers interested in admis- sion to one of the curricula offered in the submission. Requests for admission or questions regarding admission procedures should be directed to the Dean

103

This document was downloaded on May 22, 2013 at 14:28:55 Author(s) Naval Postgraduate School (U.S.)  

E-Print Network (OSTI)

, procedures and objectives. In 1973, the Naval Postgraduate School, together with the Naval War College. ADMISSIONS PROCEDURES U.S. NAVAL OFFICERS U.S. Navy officers interested in ad- mission to one- ity of quotas assigned to each country. The procedures for application are con- tained in OPNAV

104

This document was downloaded on May 22, 2013 at 14:29:10 Author(s) Naval Postgraduate School (U.S.)  

E-Print Network (OSTI)

, procedures and objectives. In 1973, the Naval Postgraduate School, together with the Naval War College or local bookstores, or from other students. ADMISSIONS PROCEDURES U.S. NAVAL OFFICERS U.S. Navy officers. Their admission is subject to availabil- ity of quotas assigned to each country. The procedures for application

105

This document was downloaded on May 22, 2013 at 14:28:34 Author(s) Naval Postgraduate School (U.S.)  

E-Print Network (OSTI)

, procedures and objectives. In 1973, the Naval Postgraduate School, together with the Naval War College Navy West Coast Match racing cham- pionships. ADMISSIONS PROCEDURES U.S. NAVAL OFFICERS U.S. Navy, and procedural guidance for the Navy's graduate education program. Included is material concerning officer

106

This document was downloaded on May 22, 2013 at 14:29:21 Author(s) Naval Postgraduate School (U.S.)  

E-Print Network (OSTI)

, procedures and objectives. In 1973, the Naval Postgraduate School, together with the Naval War College MILITARY OFFICERS ADMISSIONS PROCEDURES U.S. NAVAL OFFICERS U.S. Navy officers interested in ad- Military- ity of quotas assigned to each country. The procedures for application are con- 8 #12;GENERAL

107

This document was downloaded on May 22, 2013 at 14:28:45 Author(s) Naval Postgraduate School (U.S.)  

E-Print Network (OSTI)

, procedures and objectives. In 1973, the Naval Postgraduate School, together with the Naval War College- change system and stocks all required supplies. ADMISSIONS PROCEDURES U.S. NAVAL OFFICERS ACADEMIC of quotas assigned to each country. The procedures for application are con- 10 #12;GENERAL INFORMATION

108

This document was downloaded on May 22, 2013 at 14:29:42 Author(s) Naval Postgraduate School (U.S.)  

E-Print Network (OSTI)

the Naval Postgraduate School, in effect, a naval university, unified in policies, procedures and objec bookstores, or from other students. ADMISSIONS PROCEDURES U.S. NAVAL OFFICERS U. S. Navy officers interested. The procedures for application are contained in OPNAV INSTRUCTION 4950. IE. Corre- spondence must be processed

109

This document was downloaded on May 22, 2013 at 14:28:23 Author(s) Naval Postgraduate School (U.S.)  

E-Print Network (OSTI)

, procedures and objectives. In 1973, the Naval Postgraduate School, together with the Naval War College Navy West Coast Match racing cham- pionships. ADMISSIONS PROCEDURES U.S. NAVAL OFFICERS U.S. Navy, policy, and procedural guidance for the Navy's graduate education program. Included is material

110

Naval Research Laboratory Multiscale Targeting Guidance for T-PARC and TCS-08  

Science Conference Proceedings (OSTI)

As part of The Observing System Research and Predictability Experiment (THORPEX) Pacific Asian Regional Campaign (T-PARC) and the Office of Naval Researchs (ONRs) Tropical Cyclone Structure-08 (TCS-08) experiments, a variety of real-time ...

Carolyn A. Reynolds; James D. Doyle; Richard M. Hodur; Hao Jin

2010-04-01T23:59:59.000Z

111

Mitigation action plan sale of Naval Petroleum Reserve No. 1 (Elk Hills) Kern County, California  

Science Conference Proceedings (OSTI)

Naval Petroleum Reserve No. 1 (NPR-1, also called {open_quotes}Elk Hills{close_quotes}), a Federally-owned oil and gas production field in Kern County, California, was created by an Executive Order issued by President Taft on September 2, 1912. He signed another Executive Order on December 13, 1912, to establish Naval Petroleum Reserve No. 2 (NPR-2), located immediately south of NPR-1 and containing portions of the town of Taft, California. NPR-1 was not developed until the 1973-74 oil embargo demonstrated the nation`s vulnerability to oil supply interruptions. Following the embargo, Congress passed the Naval Petroleum Reserves Production Act of 1976 which directed that the reserve be explored and developed to its fall economic potential at the {open_quotes}maximum efficient rate{close_quotes} (MER) of production. Since Elk Hills began full production in 1976, it has functioned as a commercial operation, with total revenues to the Federal government through FY 1996 of $16.4 billion, compared to total exploration, development and production costs of $3.1 billion. In February 1996, Title 34 of the National Defense Authorization Act for Fiscal Year 1996 (P.L. 104-106), referred to as the Elk Hills Sales Statute, directed the Secretary of Energy to sell NPR-1 by February 10, 1998.The Secretary was also directed to study options for enhancing the value of the other Naval Petroleum and Oil Shale Reserve properties such as NPR-2, located adjacent to NPR-1 in Kern County- Naval Petroleum Reserve No. 3 (NPR-3) located in Natrona County, Wyoming; Naval Oil Shale Reserves No. 1 and No. 3 (NOSR-1 and NOSR-3) located in Garfield County, Colorado; and Naval Oil Shale Reserve No. 2 (NOSR-2) located in Uintah and Carbon Counties, Utah. The purpose of these actions was to remove the Federal government from the inherently non-Federal function of operating commercial oil fields while making sure that the public would obtain the maximum value from the reserves.

NONE

1998-01-01T23:59:59.000Z

112

DOE - Office of Legacy Management -- Naval Ordnance Plant - MI 0-03  

Office of Legacy Management (LM)

Plant - MI 0-03 Plant - MI 0-03 FUSRAP Considered Sites Site: NAVAL ORDNANCE PLANT (MI.0-03) Eliminated from further consideration under FUSRAP - Referred to DoD for action Designated Name: Not Designated Alternate Name: None Location: Centerline , Michigan MI.0-03-1 Evaluation Year: 1987 MI.0-03-1 Site Operations: Assembled bomb components. MI.0-03-1 Site Disposition: Eliminated - No Authority - Referred to DoD MI.0-03-1 Radioactive Materials Handled: None Indicated Primary Radioactive Materials Handled: None Radiological Survey(s): None Indicated Site Status: Eliminated from further consideration under FUSRAP - Referred to DoD for action MI.0-03-1 Also see Documents Related to NAVAL ORDNANCE PLANT MI.0-03-1 - DOE Letter; J.Fiore to C.Shafer; Subject: Information on

113

DOE - Office of Legacy Management -- Naval Proving Ground - VA 0-01  

NLE Websites -- All DOE Office Websites (Extended Search)

Proving Ground - VA 0-01 Proving Ground - VA 0-01 FUSRAP Considered Sites Site: NAVAL PROVING GROUND (VA.0-01 ) Eliminated from further consideration under FUSRAP - Referred to DOD Designated Name: Not Designated Alternate Name: None Location: Dahlgren , Virginia VA.0-01-1 Evaluation Year: 1987 VA.0-01-1 Site Operations: Site operations were not specified; this site was identified on the 1954 Accountable Station Lists. VA.0-01-1 VA.0-01-2 Site Disposition: Eliminated - Referred to DOD VA.0-01-1 Radioactive Materials Handled: None Indicated Primary Radioactive Materials Handled: None Radiological Survey(s): None Indicated Site Status: Eliminated from further consideration under FUSRAP - Referred to DOD VA.0-01-1 Also see Documents Related to NAVAL PROVING GROUND VA.0-01-1 - DOE Letter; Fiore to Schafer; Referral of DOD or Former

114

DOE - Office of Legacy Management -- Naval Ordnance Laboratory - MD 0-03  

Office of Legacy Management (LM)

Ordnance Laboratory - MD 0-03 Ordnance Laboratory - MD 0-03 FUSRAP Considered Sites Site: NAVAL ORDNANCE LABORATORY (MD.0-03 ) Eliminated from further consideration under FUSRAP - Referred to DOD Designated Name: Not Designated Alternate Name: Naval Ordnance Laboratory - White Oak Location: White Oak Area , Silver Spring , Maryland MD.0-03-1 MD.0-03-2 Evaluation Year: 1987 MD.0-03-2 Site Operations: Research and development - may have involved radioactive materials because the site was identified on a 1955 Accountability Station List. MD.0-03-1 Site Disposition: Eliminated - NRC licensed MD.0-03-2 Radioactive Materials Handled: None Specifically Identified Primary Radioactive Materials Handled: None specifically indicated Radiological Survey(s): None Indicated Site Status: Eliminated from further consideration under FUSRAP - Referred to DOD MD.0-03-2

115

Success Story: Naval Medical Center San Diego Co-Generation Project  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Success Story Success Story Success Story Naval Medical Center San Diego Naval Medical Center San Diego Co-Generation Project Co-Generation Project Karen Jackson, SDG&E Karen Jackson, SDG&E Project Manager Project Manager Edward Thibodo, NAVFAC SW Edward Thibodo, NAVFAC SW Energy Team Contract Energy Team Contract ' ' s Lead s Lead NAVFAC Contractor NAVFAC Contractor ' ' s Guide: s Guide:   Partnering Philosophy Partnering Philosophy - - " " We W are partners e are partners in every contract we award. Partnering is in every contract we award. Partnering is an attitude that we both work hard to an attitude that we both work hard to develop, an it requires both of us to take develop, an it requires both of us to take some extra risk and trust one another. some extra risk and trust one another.

116

DOE - Office of Legacy Management -- Naval Office at the University of New  

NLE Websites -- All DOE Office Websites (Extended Search)

Office at the University of Office at the University of New Mexico - NM 0-03 FUSRAP Considered Sites Site: NAVAL OFFICE AT THE UNIVERSITY OF NEW MEXICO (NM.0-03) Eliminated from further consideration under FUSRAP - Referred to DOD Designated Name: Not Designated Alternate Name: None Location: Albuquerque , New Mexico NM.0-03-1 Evaluation Year: 1987 NM.0-03-1 Site Operations: Site was a transshipment station for equipment to the Los Alamos site. NM.0-03-1 Site Disposition: Eliminated - Referred to DOD NM.0-03-1 Radioactive Materials Handled: None Indicated Primary Radioactive Materials Handled: None NM.0-03-1 Radiological Survey(s): None Indicated Site Status: Eliminated from further consideration under FUSRAP - Referred to DOD NM.0-03-1 Also see Documents Related to NAVAL OFFICE AT THE UNIVERSITY OF NEW MEXICO

117

Investigation on the continued production of the Naval Petroleum Reserves beyond April 5, 1991  

SciTech Connect

The authority to produce the Naval Petroleum Reserves (NPRs) is due to expire in April 1991, unless extended by Presidential finding. As provided in the Naval Petroleum Reserves Production act of 1976 (Public Law 94-258), the President may continue production of the NPRs for a period of up to three years following the submission to Congress, at least 180 days prior to the expiration of the current production period, of a report that determines that continued production of the NPRs is necessary and a finding by the President that continued production is in the national interest. This report assesses the need to continue production of the NPRs, including analyzing the benefits and costs of extending production or returning to the shut-in status that existed prior to 1976. This continued production study considers strategic, economic, and energy issues at the local, regional, and national levels. 15 figs., 13 tabs.

Not Available

1990-09-01T23:59:59.000Z

118

Naval Petroleum and Oil Shale Reserves annual report of operations, Fiscal year 1991  

Science Conference Proceedings (OSTI)

During FY 1991 the Reserves generating $654 million in revenues, a $52 million increase from the Fy 1990 revenues, reflecting the increase in FY 1991 oil prices during the Gulf War. Total costs were $200 million, resulting in net cash flow of $454 million, compared with $423 million in FY 1990. Revenues for FY 1992 are expected to decrease, reflecting a decrease in production and prices. In FY 1991, production at the NPRs at maximum efficient rates yielded 28 million barrels of crude oil, 125 billion cubic feet of natural gas, and 183 million gallons of natural gas liquids. Additional highlights on the following topics are included: legislative change, Naval Petroleum Reserve-1 (NPR-1) exploration, NPR-1 horizontal drilling, NPR-1 shallow oil zone gas injection project, NPR-1 FY 1991-1997 long range plan, NPR-1 environment and safety, NPR-2 exploration drilling, NPR-3 steamflood, Naval Oil Shale Reserves gas migration prevention.

Not Available

1991-01-01T23:59:59.000Z

119

Naval Petroleum and Oil Shale Reserves annual report of operations, Fiscal year 1991  

Science Conference Proceedings (OSTI)

During FY 1991 the Reserves generating $654 million in revenues, a $52 million increase from the Fy 1990 revenues, reflecting the increase in FY 1991 oil prices during the Gulf War. Total costs were $200 million, resulting in net cash flow of $454 million, compared with $423 million in FY 1990. Revenues for FY 1992 are expected to decrease, reflecting a decrease in production and prices. In FY 1991, production at the NPRs at maximum efficient rates yielded 28 million barrels of crude oil, 125 billion cubic feet of natural gas, and 183 million gallons of natural gas liquids. Additional highlights on the following topics are included: legislative change, Naval Petroleum Reserve-1 (NPR-1) exploration, NPR-1 horizontal drilling, NPR-1 shallow oil zone gas injection project, NPR-1 FY 1991-1997 long range plan, NPR-1 environment and safety, NPR-2 exploration drilling, NPR-3 steamflood, Naval Oil Shale Reserves gas migration prevention.

Not Available

1991-12-31T23:59:59.000Z

120

U.S. Department of Energy Naval Petroleum and Oil Shale Reserves combined financial statements, September 30, 1996 and 1995  

Science Conference Proceedings (OSTI)

The Naval Petroleum and Oil Shale Reserves (NPOSR) produces crude oil and associated hydrocarbons from the Naval Petroleum Reserves (NPR) numbered 1, 2, and 3, and the Naval Oil Shale Reserves (NOSR) numbered 1, 2, and 3 in a manner to achieve the greatest value and benefits to the US taxpayer. NPOSR consists of the Naval Petroleum Reserve in California (NPRC or Elk Hills), which is responsible for operations of NPR-1 and NPR-2; the Naval Petroleum Oil Shale Reserve in Colorado, Utah, and Wyoming (NPOSR-CUW), which is responsible for operations of NPR-3, NOSR-1, 2, and 3 and the Rocky Mountain Oilfield Testing Center (RMOTC); and NPOSR Headquarters in Washington, DC, which is responsible for overall program direction. Each participant shares in the unit costs and production of hydrocarbons in proportion to the weighted acre-feet of commercially productive oil and gas formations (zones) underlying the respective surface lands as of 1942. The participating shares of NPR-1 as of September 30, 1996 for the US Government and Chevron USA, Inc., are listed. This report presents the results of the independent certified public accountants` audit of the Department of Energy`s (Department) Naval Petroleum and Oil Shale Reserves (NPOSR) financial statements as of September 30, 1996.

NONE

1997-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "numerous naval propulsor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

EIS-0251: Department of the Navy Final Environmental Impact Statement for a Container System for the Management of Naval Spent Nuclear Fuel (November 1996)  

Energy.gov (U.S. Department of Energy (DOE))

This Final Environmental Impact Statementaddresses six general alternative systems for the loading, storage, transport, and possible disposal of naval spent nuclear fuel following examination.

122

Naval Petroleum and Oil Shale Reserves. Annual report of operations, Fiscal year 1993  

Science Conference Proceedings (OSTI)

During fiscal year 1993, the reserves generated $440 million in revenues, a $33 million decrease from the fiscal year 1992 revenues, primarily due to significant decreases in oil and natural gas prices. Total costs were $207 million, resulting in net cash flow of $233 million, compared with $273 million in fiscal year 1992. From 1976 through fiscal year 1993, the Naval Petroleum and Oil Shale Reserves generated $15.7 billion in revenues for the US Treasury, with expenses of $2.9 billion. The net revenues of $12.8 billion represent a return on costs of 441 percent. See figures 2, 3, and 4. In fiscal year 1993, production at the Naval Petroleum and Oil Shale Reserves at maximum efficient rates yielded 25 million barrels of crude oil, 123 billion cubic feet of natural gas, and 158 million gallons of natural gas liquids. The Naval Petroleum and Oil Shale Reserves has embarked on an effort to identify additional hydrocarbon resources on the reserves for future production. In 1993, in cooperation with the US Geological Survey, the Department initiated a project to assess the oil and gas potential of the program`s oil shale reserves, which remain largely unexplored. These reserves, which total a land area of more than 145,000 acres and are located in Colorado and Utah, are favorably situated in oil and gas producing regions and are likely to contain significant hydrocarbon deposits. Alternatively the producing assets may be sold or leased if that will produce the most value. This task will continue through the first quarter of fiscal year 1994.

Not Available

1993-12-31T23:59:59.000Z

123

Naval petroleum and oil shale reserves: Annual report of operations, Fiscal Year 1986  

Science Conference Proceedings (OSTI)

Market prices for curde oil experienced their greatest decline in history during 1986, with substantial effect on the Naval Petroleum and Oil Shale Reserves. Sales procedures which had served the Department well in prior years during periods when oil prices were stable or rising were found inadequate to cope with these declines, and new sales procedures were developed and implemented. Congressional concern that the Government receive fair prices from Naval Petroleum Reserves (NPR) petroleum sales also led to Public Law No. 99-413, enacted on August 29, 1986, which amended title 10, United States Code, Chapter 641. This law sets a minimum price, using two criteria, under which petroleum from the NPR cannot be sold. Notwithstanding the decline in oil and gas prices, revenues from the sale of NPR petroleum totaled $763 million in 1986. Although this represented a 41% decline from 1985 receipts, the 1986 revenues well exceeded net program expenditures of $157 million. Because of the decline in prevailing oil prices during the second quarter of 1986, major cost reductions of $3.4 million were implemented at NPR-3, and even greater reductions are planned for 1987 to ensure the profitability of that field. The decline in energy prices also affected plans to protect natural gas underlying Naval Oil Shale Reserve No. 3 (NOSR-3). Two of 14 planned wells were drilled and are available for production. Unfortunately, efforts to sell gas from these wells have been unsuccessful, and further drilling has been delayed until the gas market is stronger. 16 figs., 20 tabs.

Not Available

1987-01-01T23:59:59.000Z

124

Rocky Mountain Oilfield Testing Center RMOTC at the Naval Petroleum Reserve No. 3  

NLE Websites -- All DOE Office Websites (Extended Search)

RMOTC RMOTC The Rocky Mountain Oilfield Testing Center (RMOTC), is an operating oil field focusing on environmentally-balanced energy technologies and alternatives, and is the premiere energy testing and demonstration field in the nation. 3 3 * the opportunity to explore environmentally- balanced solutions to the nation's energy issues * opportunities to develop, demonstrate, and evaluate a variety of energy related technologies * a chance to collaborate with top professionals in the energy, environmental technology, and engineering fields * shared industry knowledge through technology transfer via reports, journal articles, and presentations Located within the Naval Petroleum Reserve No. 3 (NPR-3) near Casper, Wyoming, RMOTC offers: RMOTC Offers Solutions 4 4 The Administration and Engineering

125

Quality assurance assessment of new efficient lighting systems for Naval ships. Final report  

SciTech Connect

Ballasts and lamps, which have been selected to replace existing lamp/ballast systems based on improved performance, were tested to determine if they meet standard Naval MIL specifications. Fifty ballasts manufactured by Advance Transformer Corporation and Universal Manufacturing Corp., and 100 lamps manufactured by GTE were tested to determine their quality assurance and durability. These components met all of the MIL specifications that lamp/ballast systems in use must meet. In addition, these new systems have an improved system efficacy, 62 lumens per watt, and lower third harmonics, which will reduce the need for generating capacity for lighting on ships.

Verderber, R.

1984-08-01T23:59:59.000Z

126

This document was downloaded on May 22, 2013 at 14:29:32 Author(s) Naval Postgraduate School (U.S.)  

E-Print Network (OSTI)

- graduate School in effect, a naval univer- sity, unified in policies, procedures and ob- jectives. In 1973;GENERAL INFORMATION ADMISSIONS PROCEDURES U.S. NAVAL OFFICERS U.S. Navy officers interested in admis- sion to availability of quotas assigned to each country. The procedures for application are contained in OPNAV

127

This document was downloaded on May 22, 2013 at 14:24:38 Author(s) Naval Postgraduate School (U.S.)  

E-Print Network (OSTI)

Organizations 18 Student Council 18 Selection Procedures 19 Naval Officers 19 Other U.S. Military Officers 19 in matters involving curricula, facilities, procedures and policies deemed worthy of attention. The OSAC. SELECTION PROCEDURES NAVAL OFFICERS Selection for the Navy fully funded graduate education program is based

128

This document was downloaded on May 22, 2013 at 14:25:15 Author(s) Naval Postgraduate School (U.S.)  

E-Print Network (OSTI)

20 Selection Procedures 20 Naval Officers 20 Other U.S. Military Officers 20 International Military administration. It functions in an advisory capacity in matters involving curricula, facilities, procedures graduate education program. SELECTION PROCEDURES NAVAL OFFICERS Selection for the Navy fully funded

129

This document was downloaded on May 22, 2013 at 14:23:11 Author(s) Naval Postgraduate School (U.S.)  

E-Print Network (OSTI)

Center for Executive Education 11 NPS Curricula Summary 13 ADMISSIONS 16 Selection Procedures 16 Naval SELECTION PROCEDURES NAVAL OFFICERS Selection for the Navy fully funded graduate education program is based may be admitted to most curricula. The procedures for application are available from the Security

130

This document was downloaded on May 22, 2013 at 14:27:00 Author(s) Naval Postgraduate School (U.S.)  

E-Print Network (OSTI)

15 Faculty Organizations 16 Student Council 17 Admissions 18 Selection Procedures 18 Naval Officers, procedures and policies deemed worthy of attention. The OSAC is comprised of thirty-five student for the Navy's fully funded graduate education program. SELECTION PROCEDURES NAVAL OFFICERS Selection

131

This document was downloaded on May 22, 2013 at 14:23:43 Author(s) Naval Postgraduate School (U.S.)  

E-Print Network (OSTI)

Organizations 17 Student Council 17 ADMISSIONS 18 Selection Procedures 18 Naval Officers 18 Other U.S. Military. It functions in an advisory capacity in matters involving curricula, facilities, procedures and policies deemed funded graduate education program. SELECTION PROCEDURES NAVAL OFFICERS Selection for the Navy fully

132

This document was downloaded on May 22, 2013 at 14:24:49 Author(s) Naval Postgraduate School (U.S.)  

E-Print Network (OSTI)

Council 18 Selection Procedures 19 Naval Officers 19 Other U.S. Military Officers 19 International involving curricula, facilities, procedures and policies deemed worthy of attention. The OSAC is comprised. SELECTION PROCEDURES NAVAL OFFICERS Selection for the Navy fully funded graduate education program is based

133

This document was downloaded on May 22, 2013 at 14:24:27 Author(s) Naval Postgraduate School (U.S.)  

E-Print Network (OSTI)

Selection Procedures 20 Naval Officers 20 Other U.S. Military Officers 20 International Military Officers 20 administration. It functions in an advisory capacity in matters involving curricula, facilities, procedures funded graduate education program. SELECTION PROCEDURES NAVAL OFFICERS Selection for the Navy fully

134

Department of Energy Programmatic Spent Nuclear Fuel Management and Idaho National Engineering Laboratory Environmental Restoration and Waste Management Programs Draft Environmental Impact Statement. Volume 1, Appendix D, Part B: Naval spent nuclear fuel management  

SciTech Connect

This volume contains the following attachments: transportation of Naval spent nuclear fuel; description of Naval spent nuclear receipt and handling at the Expended Core Facility at the Idaho National Engineering Laboratory; comparison of storage in new water pools versus dry container storage; description of storage of Naval spent nuclear fuel at servicing locations; description of receipt, handling, and examination of Naval spent nuclear fuel at alternate DOE facilities; analysis of normal operations and accident conditions; and comparison of the Naval spent nuclear fuel storage environmental assessment and this environmental impact statement.

1994-06-01T23:59:59.000Z

135

FEMP ESPC Success Story - U.S. Naval Station, Guantanamo Bay, Cuba  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

a m a m ESPC Success Stories Environmental Stewardship and Cost Savings These photographs chronicle the installation of the wind turbines at John Paul Jones Hill, Guantanamo Bay. The four wind turbine towers are about 185 feet high. The blade lengths are 90 feet. The top of the blades are about 275 feet off the g round. The blades rotate at a maximum of 22 RPM, or a rotation every three seconds. This translates to a blade tip speed of 140 mph. During construction there were as many as 20 workers on the project. However, operating the wind turbines will only take one part-time staff-person who will check on them daily. Photos courtesy of: Jeffrey M. Johnston, Public Works Officer, Guantanamo Bay; Paul DelSignore, NFESC; Daniel Ingold, NORESCO. U.S. NAVAL STATION

136

DOE - Office of Legacy Management -- Naval Supply Depot AEC Warehouse - NY  

Office of Legacy Management (LM)

Supply Depot AEC Warehouse - Supply Depot AEC Warehouse - NY 36 FUSRAP Considered Sites Site: NAVAL SUPPLY DEPOT, AEC WAREHOUSE (NY.36) Eliminated from further consideration under FUSRAP - Referred to DOD Designated Name: Not Designated Alternate Name: None Location: Building 546 , Scotia , New York NY.36-1 Evaluation Year: 1987 NY.36-1 Site Operations: This facility served as a storage and transshipment point for feed materials between the Hanford and commercial metal fabricators in the northeastern states. NY.36-1 NY.36-2 NY.36-3 Site Disposition: Eliminated - Referred to DOD NY.36-1 Radioactive Materials Handled: Yes Primary Radioactive Materials Handled: Uranium, Thorium Metals NY.36-1 NY.36-2 NY.36-3 Radiological Survey(s): None Indicated Site Status: Eliminated from further consideration under FUSRAP - Referred to DOD NY.36-1

137

Rocky Mountain Oilfield Testing Center RMOTC at the Naval Petroleum Reserve No. 3  

NLE Websites -- All DOE Office Websites (Extended Search)

& Renewable Energy Scoping Meeting & Renewable Energy Scoping Meeting March 26, 2004 2 2 RMOTC The Rocky Mountain Oilfield Testing Center (RMOTC), is an operating oil field focusing on environmentally-balanced energy technologies and alternatives, and is the premiere energy testing and demonstration field in the nation. 3 3 * the opportunity to explore environmentally- balanced solutions to the nation's energy issues * opportunities to develop, demonstrate, and evaluate a variety of energy related technologies * a chance to collaborate with top professionals in the energy, environmental technology, and engineering fields * shared industry knowledge through technology transfer via reports, journal articles, and presentations Located within the Naval Petroleum Reserve No. 3 (NPR-3) near Casper, Wyoming, RMOTC offers:

138

Department of Energy, Office of Naval Petroleum & Oil Shale Reserves  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Request for Records Disposition Authority Leave Blank (NARA Use Only) (See Instructions on reverse) Job Number I / {£. 0- _~ To. National Archives and Records Administration (NIR) NI-'-r 3 7- 6 6 J Washington, DC 20408 Date Received 1 From (Agencyor establishment) Department of Energy Notification to Agency 2 MajorSubdivrsion In accordance with the provisions of 44 Assistant Secretary for Fossil Energy USC 3303a. the disposition request. In- cluding amendments. ISapproved except for 3 Minorsubcrvrsron Items that may be marked "disposrtron not Office of Naval Petroleum & Oil Shale Reserves approved" or "withdrawn" In column 10 4 Nameof Personwith whom to confer 5 Telephone (Includearea code) [ Pamela Gentel 301-903-1856 6 Agency Certification

139

Major General Harold Holesinger The Adjutant General Illinois Kilitary and Naval Dept.  

Office of Legacy Management (LM)

General Harold Holesinger General Harold Holesinger The Adjutant General Illinois Kilitary and Naval Dept. 1301 North MacArthur Boulevard Springfield, Illinois 62702-2399 Dear General Holesinger: I am enclosing a copy of the radiological survey report for the National Guard Armory, Chicago, Illinois. Although the data ncted in the report indicate levels of radioactivity in excess of current guidelines, the radioactive residues presently there do not pose a health hazard provided they were not disturbed in the past and will not be disturbed in the future; i.e., no excavation, building, or construction that would disturb the areas in which contamination was found. Based on these data and on an authority record review, the National Guard Armory property is being authorized for remedial action and will be

140

Rocky Mountain Oilfield Testing Center RMOTC at the Naval Petroleum Reserve No. 3  

NLE Websites -- All DOE Office Websites (Extended Search)

OILFIELD TESTING OILFIELD TESTING OILFIELD TESTING CENTER CENTER 2 2 HISTORY OF TEAPOT DOME Mark Milliken 3 3 TEAPOT DOME LOCATION 4 4 Salt Creek 670 MMBBLS 722 BCF Teapot Dome 27 MMBBLS 57 BCF N P R - 3 Cumulative Production 5 5 The Great White Fleet December 1907 - February 1909 6 6 THE END OF COAL-FIRED SHIPS * 2-week cruising time. * Labor and time intensive cleaning and reloading. * At the mercy of foreign countries for coal supply. * 1912: All battleships will be oil-powered. Great White Fleet 7 7 NAVAL PETROLEUM RESERVES ARE BORN * 1908: Dr. Otis Smith, USGS Director, recommends DOI retain oil lands for fuel reserve for Navy. * 1909: Taft withdraws 3,000,000 acres in Wyoming and California. * 1910: Concern over the President's authority to withdraw lands, so Congress passed the Pickett Act. * 1910: Taft issues a 2nd land withdrawal executive

Note: This page contains sample records for the topic "numerous naval propulsor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Quality assurance assessment of new efficient lighting systems for naval ships. Final report. Revision  

SciTech Connect

Ballasts and lamps, which have been selected to replace existing lamp/ballast systems based on improved performance, were tested to determine if they meet standard Naval MIL specifications. Fifty ballasts manufactured by Advance Transformer Corporation and Universal Manufacturing Corporation and 100 lamps manufactured by GTE were tested to determine their quality assurance and durability. These components met all of the MIL specifications that lamp/ballast systems in use must meet. These new systems have an improved system efficacy, 62 lumens per watt, and lower third harmonics, which will reduce the need for generating capacity for lighting on ships. An addendum to the original study describes the assessment of the performance of the advanced ballast system with a new F-17 fluorescent lamp. The results indicate the system performs reliably and shows increased efficacy. This new lamp/ballast system reduces the harmonic content to within Navy limits, and improves the power factor, resulting in a 50% reduction in line current.

Verderber, R.R.; Morse, O.; Dumm, C.

1984-12-01T23:59:59.000Z

142

AUTOMATED RADIOLOGICAL MONITORING AT A RUSSIAN MINISTRY OF DEFENCE NAVAL SITE.  

SciTech Connect

The Arctic Military Environmental Cooperation (AMEC) Program is a cooperative effort between the military establishments of the Kingdom of Norway, the Russian Federation, and the US. This paper discusses joint activities conducted over the past year among Norwegian, Russian, and US technical experts on a project to develop, demonstrate and implement automated radiological monitoring at Russian Navy facilities engaged in the dismantlement of nuclear-powered strategic ballistic missile launching submarines. Radiological monitoring is needed at these facilities to help protect workers engaged in the dismantlement program and the public living within the footprint of routine and accidental radiation exposure areas. By providing remote stand-alone monitoring, the Russian Navy will achieve added protection due to the defense-in-depth strategy afforded by local (at the site), regional (Kola) and national-level (Moscow) oversight. The system being implemented at the Polyaminsky Russian Naval Shipyard was developed from a working model tested at the Russian Institute for Nuclear Safety, Moscow, Russia. It includes Russian manufactured terrestrial and underwater gamma detectors, smart controllers for graded sampling, radio-modems for offsite transmission of the data, and a data fusion/display system: The data fusion/display system is derived from the Norwegian Picasso AMEC Environmental Monitoring software package. This computer package allows monitoring personnel to review the real-time and historical status of monitoring at specific sites and objects and to establish new monitoring protocols as required, for example, in an off-normal accident situation. Plans are being developed to implement the use of this system at most RF Naval sites handling spent nuclear fuel.

MOSKOWITZ,P.D.; POMERVILLE,J.; GAVRILOV,S.; KISSELEV,V.; DANIYLAN,V.; BELIKOV,A.; EGORKIN,A.; SOKOLOVSKI,Y.; ENDREGARD,M.; KROSSHAVN,M.; SUNDLING,C.V.; YOKSTAD,H.

2001-02-25T23:59:59.000Z

143

AUTOMATED RADIOLOGICAL MONITORING AT A RUSSIAN MINISTRY OF DEFENSE NAVAL SITE.  

SciTech Connect

The Arctic Military Environmental Cooperation (AMEC) Program is a cooperative effort between the military establishments of the Kingdom of Norway, the Russian Federation, and the US. This paper discusses joint activities conducted over the past year among Norwegian, Russian, and US technical experts on a project to develop, demonstrate and implement automated radiological monitoring at Russian Navy facilities engaged in the dismantlement of nuclear-powered strategic ballistic missile launching submarines. Radiological monitoring is needed at these facilities to help protect workers engaged in the dismantlement program and the public living within the footprint of routine and accidental radiation exposure areas. By providing remote stand-alone monitoring, the Russian Navy will achieve added protection due to the defense-in-depth strategy afforded by local (at the site), regional (Kola) and national-level (Moscow) oversight. The system being implemented at the Polyaminsky Russian Naval Shipyard was developed from a working model tested at the Russian Institute for Nuclear Safety, Moscow, Russia. It includes Russian manufactured terrestrial and underwater gamma detectors, smart controllers for graded sampling, radio-modems for offsite transmission of the data, and a data fusion/display system: The data fusion/display system is derived from the Norwegian Picasso AMEC Environmental Monitoring software package. This computer package allows monitoring personnel to review the real-time and historical status of monitoring at specific sites and objects and to establish new monitoring protocols as required, for example, in an off-normal accident situation. Plans are being developed to implement the use of this system at most RF Naval sites handling spent nuclear fuel.

MOSKOWITZ,P.D.; POMERVILLE,J.; GAVRILOV,S.; KISSELEV,V.; DANIYLAN,V.; BELIKOV,A.; EGORKIN,A.; SOKOLOVSKI,Y.; ENDREGARD,M.; KROSSHAVN,M.; SUNDLING,C.V.; YOKSTAD,H.

2001-02-25T23:59:59.000Z

144

"The Fourth Dimension of Naval Tactics": The U.S. Navy and Public Relations, 1919-1939  

E-Print Network (OSTI)

Prior to 1917, the United States Navy only utilized public relations techniques during times of war or to attract recruits into naval service. Following World I, the Navy confronted several daunting problems, including the postwar demobilization of naval assets, the proposed creation of an independent air service, and a public desire for naval arms limitation which many officers believed would endanger the Navy's ability to fulfill its missions. These issues threatened the generous support that the Navy had received from Congress for a quarter of a century, and also hampered the service's attempts to incorporate new weapons systems into its arsenal and recruit high-quality manpower. In response to these challenges, the Navy developed a peacetime public relations capability during the interwar period, despite the fact that many senior naval officials placed a low priority on public relations. Their attitude led subordinates in different parts of the Navy Department to perform public relations tasks despite lacking official orders to carry out such work. Such efforts were haphazard, redundant, handicapped by tradition, and dependent largely upon individual initiative. To augment its meager capabilities, the Navy relied upon external groups, such as the Navy League, to lobby the public for naval expansion. The service also developed formal and informal ties to the mass media, particularly the rapidly expanding motion picture industry. These disparate elements attempted to convince the public that the Navy was a haven for morally upright masculine behavior, a service able to integrate aircraft and submarines into its force structure and keep their operators safe, and a vital national asset with value beyond basic national defense. During the interwar period, the Navy expanded and reorganized the ways in which it courted public opinion. By forging ties with motion picture studios, radio broadcasters, and the print media, it was able to improve the image of the service, attract high quality recruits, and gained the public support for its drive to gain the resources needed to modernize and expand the fleet. During the same era, naval officials became more adept at minimizing the negative impact of the accidents linked to the development of aviation and submarines. Developments of the era laid the foundation for the institutional development of public relations and enhanced media relations during World War II and in the decades that followed.

Wadle, Ryan David

2011-05-01T23:59:59.000Z

145

Java and Numerical Computing  

Science Conference Proceedings (OSTI)

Java represents both a challenge and an opportunity to practitioners of numerical computing. This article analyzes the current state of Java in numerical computing and identifies some directions for the realization of its full potential.

Ronald F. Boisvert; Jos Moreira; Michael Philippsen; Roldan Pozo

2001-01-01T23:59:59.000Z

146

This document was downloaded on May 22, 2013 at 14:34:19 Author(s) Naval Postgraduate School (U.S.)  

E-Print Network (OSTI)

to the Naval Auxiliary Air Station to house trans- sonic and supersonic wind tunnels and jet com- bustion pits tunnels and jet com- bustion pits. The third and next building increment is expected to comprise a General

147

Using Net-Zero Energy Projects to Enable Sustainable Economic Redevelopment at the Former Brunswick Air Naval Base  

SciTech Connect

A Study Prepared in Partnership with the Environmental Protection Agency for the RE-Powering America's Land Initiative: Siting Renewable Energy on Potentially Contaminated Land and Mine Sites. The Brunswick Naval Air Station is a naval air facility and Environmental Protection Agency (EPA) Super Fund site that is being cleaned up, and closed down. The objective of this report is not only to look at the economics of individual renewable energy technologies, but also to look at the systemic benefits that can be gained when cost-effective renewable energy technologies are integrated with other systems and businesses in a community; thus multiplying the total monetary, employment, and quality-of-life benefits they can provide to a community.

Huffman, S.

2011-10-01T23:59:59.000Z

148

Environmental Survey preliminary report, Naval Petroleum and Oil Shale Reserves in Colorado, Utah, and Wyoming, Casper, Wyoming  

Science Conference Proceedings (OSTI)

This report presents the preliminary environmental findings from the first phase of the Environmental Survey of the United States Department of Energy (DOE) Naval Petroleum and Oil Shale Reserves in Colorado, Utah, and Wyoming (NPOSR-CUW) conducted June 6 through 17, 1988. NPOSR consists of the Naval Petroleum Reserve No. 3 (NPR-3) in Wyoming, the Naval Oil Shale Reserves No. 1 and 3 (NOSR-1 and NOSR-3) in Colorado and the Naval Oil Shale Reserve No. 2 (NOSR-2) in Utah. NOSR-2 was not included in the Survey because it had not been actively exploited at the time of the on-site Survey. The Survey is being conducted by an interdisciplinary team of environmental specialists, lead and managed by the Office of Environment, Safety and Health's Office of Environmental Audit. Individual team specialists are outside experts being supplied by a private contractor. The objective of the Survey is to identify environmental problems and areas of environmental risk associated with NPOSR. The Survey covers all environmental media and all areas of environmental regulation. It is being performed in accordance with the DOE Environmental Survey Manual. This phase of the Survey involves the review of existing site environmental data, observations of the operations carried on at NPOSR and interviews with site personnel. The Survey team has developed a Sampling and Analysis Plan to assist in further assessing specific environmental problems identified at NOSR-3 during the on-site Survey. There were no findings associated with either NPR-3 or NOSR-1 that required Survey-related sampling and Analysis. The Sampling and Analysis Plan will be executed by Idaho National Engineering Laboratory. When completed, the results will be incorporated into the Environmental Survey Summary report. The Summary Report will reflect the final determinations of the NPOSR-CUW Survey and the other DOE site-specific Surveys. 110 refs., 38 figs., 24 tabs.

Not Available

1989-02-01T23:59:59.000Z

149

Report to the President on agreements and programs relating to the Naval Petroleum and Oil Shale Reserves  

SciTech Connect

The Department of Energy monitors commercial natural gas production activities along the boundaries of Naval Oil Shale Reserve No. 1 and Naval Oil Shale Reserve No. 3, which are located in Garfield County, Colorado, and were created in the early part of this century to provide a future source of shale oil for the military. In response to the private sector`s drilling of natural gas wells along the south and southwest boundaries of the Reserves, which began in the early 1980`s, the Department developed a Natural Gas Protection Program to protect the Government`s resources from drainage due to the increasing number of commercial gas wells contiguous to Naval Oil Shale Reserve No. 3. This report provides an update of the Gas Protection Program being implemented and the agreements that have been placed in effect since December 19, 1991, and also includes the one communitized well containing Naval Petroleum Reserve No. 3 lands. The Protection Program employs two methods to protect the Government`s resources: (1) sharing with the private sector in the costs and production of wells by entering into ``communitization`` agreements; and (2) drilling wholly-owned Government wells to ``offset`` commercial wells that threaten to drain natural gas from the Reserves. The methods designed to protect the Government`s resources are achieving their objective of abating gas drainage and migration. As a result of the Protection Program, the Department of Energy is able to produce natural gas and either sell its share on the open market or transfer it for use at Government facilities. The Natural Gas Protection Program is a reactive, ongoing program that is continually revised as natural gas transportation constraints, market conditions, and nearby commercial production activities change.

1994-08-01T23:59:59.000Z

150

Final sitewide environmental assessment for continued development of Naval Petroleum Reserve No. 3 (NPR-3), Natrona County, Wyoming  

SciTech Connect

The Secretary of Energy is required by law to explore, prospect, conserve, develop, use, and operate the Naval Petroleum and Oil Shale Reserves. The Naval Petroleum Reserves Production Act of 1976 (Public Law 94-258), requires that the Naval Petroleum Reserves be produced at their maximum efficient rate (MER), consistent with sound engineering practices, for a period of six years. To fulfill this mission, DOE is proposing continued development activities which would include the drilling of approximately 250 oil production and injection (gas, water, and steam) wells, the construction of between 25 and 30 miles of associated gas, water, and steam pipelines, the installation of several production and support facilities, and the construction of between 15 and 20 miles of access roads. These drilling and construction estimates include any necessary activities related to the operation of the Rocky Mountain Oilfield Testing Center (RMOTC). The purpose of RMOTC will be to provide facilities and necessary support to government and private industry for testing and evaluating new oilfield and environmental technologies, and to transfer these results to the petroleum industry through seminars and publications. Continued development activities either have no potential to result in adverse environmental impacts or would only result in adverse impacts that could be readily mitigated. The small amounts of disturbed surface area will be reclaimed to its original natural state when production operations terminate. The preparation of an environmental impact statement is not required, and the DOE is issuing this Finding of No Significant Impact (FONSI). 73 refs.

1995-07-01T23:59:59.000Z

151

Active control of underwater propulsor using shape memory alloys  

E-Print Network (OSTI)

The development of a leading edge propeller blade reconfiguration system using Shape Memory Allow (SMA) muscles is presented. This work describes the design and testing of a leading edge flap, which is used to alter the local camber of a propeller blade. The leading edge flap is deflected by SMA wires housed in the blade and maintained in a fixed position with a shaft locking and releasing mechanism. A locking and releasing mechanism is utilized so that constant actuation of the SMAs is not required to maintain leading edge deflection. The profile at 70% span of the propeller blade was used to create a two-dimensional blade for leading edge flap design implementation and load testing. Deflection of up to five degrees was obtained with the final design of the leading edge flap and locking and releasing mechanism. The SMA muscles used to deflect the leading edge were actuated electronically through resistive heating and were controlled by a proportional/integral gain control algorithm with closed-loop feedback from a linear displacement sensor within the blade. With the final design of the leading edge flap and locking and releasing mechanism, a preliminary design for a three-dimensional propeller was created.

Wasylyszyn, Jonathan Allen

2005-12-01T23:59:59.000Z

152

Distributed Energy Resources at Naval Base Ventura County Building1512: A Sensitivity Analysis  

Science Conference Proceedings (OSTI)

This report is the second of a two-part study by BerkeleyLab of a DER (distributed energy resources) system at Navy Base VenturaCounty (NBVC). First, a preliminary assessment ofthe cost effectivenessof distributed energy resources at Naval Base Ventura County (NBVC)Building 1512 was conducted in response to the base s request for designassistance to the Federal Energy Management Program (Bailey and Marnay,2004). That report contains a detailed description of the site and theDER-CAM (Consumer Adoption Model) parameters used. This second reportcontains sensitivity analyses of key parameters in the DER system modelof Building 1512 at NBVC and additionally considers the potential forabsorption-powered refrigeration.The prior analysis found that under thecurrent tariffs, and given assumptions about the performance andstructure of building energy loads and available generating technologycharacteristics, installing a 600 kW DER system with absorption coolingand recovery heat capabilities could deliver cost savings of about 14percent, worth $55,000 per year. However, under current conditions, thisstudy also suggested that significant savings could be obtained ifBuilding 1512 changed from its current direct access contract to a SCETOU-8 (Southern California Edison time of use tariff number 8) ratewithout installing a DER system. Evaluated on this tariff, the potentialsavings from installation of a DER system would be about 4 percent of thetotal bill, or $16,000 per year.

Bailey, Owen C.; Marnay, Chris

2005-06-05T23:59:59.000Z

153

Oil shale resources of the Naval Oil Shale Reserve No. 1, Colorado  

SciTech Connect

The resource of potential oil represented by Green River Formation oil shale on Naval Oil Shale Reserve No. 1 (NOSR No. 1) in the southeast corner of Colorado's Piceance Creek Basin is evaluated in detail. NOSR No. 1 is the site of intensive long-term oil-shale development studies and is the source of innumerable oil-shale samples for all manner of testing. A brief history of these studies is presented. This oil-shale resource is defined from oil-yield assay data on 33 cores plotted as histograms and correlated into cross sections. Contour maps of thickness, richness and oil resource in place are presented for the Mahogany Zone, the rich zone in the Mahogany zone, and for 2 units beneath and 5 units above the Mahogany zone. Total oil shale resource on NOSR No. 1 is 20.4 billion barrels of which 17.4 billion barrels are particularly suitable for development by vertical modified in-place processes. A previously unknown Mahogany zone outcrop providing much additional development access is described. Now under sole control of the US Department of Energy (DOE), NOSR No. 1 offers DOE a unique site for oil shale testing and development.

Smith, J.W.; Beard, T.N.; Trudell, L.G.

1979-06-01T23:59:59.000Z

154

Department of Energy Programmatic Spent Nuclear Fuel Management and Idaho National Engineering Laboratory Environmental Restoration and Waste Management Programs, Draft Environmental Impact Statement. Volume 1, Appendix D: Part A, Naval Spent Nuclear Fuel Management  

SciTech Connect

Volume 1 to the Department of Energy`s Programmatic Spent Nuclear Fuel Management and Idaho National Engineering Laboratory Environmental Management Programs Environmental Impact Statement evaluates a range of alternatives for managing naval spent nuclear fuel expected to be removed from US Navy nuclear-powered vessels and prototype reactors through the year 2035. The Environmental Impact Statement (EIS) considers a range of alternatives for examining and storing naval spent nuclear fuel, including alternatives that terminate examination and involve storage close to the refueling or defueling site. The EIS covers the potential environmental impacts of each alternative, as well as cost impacts and impacts to the Naval Nuclear Propulsion Program mission. This Appendix covers aspects of the alternatives that involve managing naval spent nuclear fuel at four naval shipyards and the Naval Nuclear Propulsion Program Kesselring Site in West Milton, New York. This Appendix also covers the impacts of alternatives that involve examining naval spent nuclear fuel at the Expended Core Facility in Idaho and the potential impacts of constructing and operating an inspection facility at any of the Department of Energy (DOE) facilities considered in the EIS. This Appendix also considers the impacts of the alternative involving limited spent nuclear fuel examinations at Puget Sound Naval Shipyard. This Appendix does not address the impacts associated with storing naval spent nuclear fuel after it has been inspected and transferred to DOE facilities. These impacts are addressed in separate appendices for each DOE site.

Not Available

1994-06-01T23:59:59.000Z

155

Naval Station Newport Wind Resource Assessment. A Study Prepared in Partnership with the Environmental Protection Agency for the RE-Powering America's Land Initiative: Siting Renewable Energy on Potentially Contaminated Land and Mine Sites, and The Naval Facilities Engineering Service Center  

NLE Websites -- All DOE Office Websites (Extended Search)

Naval Station Newport Naval Station Newport Wind Resource Assessment A Study Prepared in Partnership with the Environmental Protection Agency for the RE-Powering America's Land Initiative: Siting Renewable Energy on Potentially Contaminated Land and Mine Sites, and The Naval Facilities Engineering Service Center Robi Robichaud, Jason Fields, and Joseph Owen Roberts Technical Report NREL/TP-6A20-52801 February 2012 NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency & Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. National Renewable Energy Laboratory 1617 Cole Boulevard Golden, Colorado 80401 303-275-3000 * www.nrel.gov Contract No. DE-AC36-08GO28308 Naval Station Newport

156

Numerical Generation of Entropies  

Science Conference Proceedings (OSTI)

The spurious numerical generation and/or destruction of various types of entropies in models is investigated. It is shown that entropy s? of dry matter tends to be generated if potential temperature is advected by a damping scheme. There is no ...

Joseph Egger

1999-09-01T23:59:59.000Z

157

US Department of Energy Naval Petroleum and Oil Shale Reserves combined financial statements and management overview and supplemental financial and management information, September 30, 1995 and 1994  

Science Conference Proceedings (OSTI)

This report presents the results of the independent certified public accountant`s audit of the Department of Energy`s (Department) Naval Petroleum and Oil Shale Reserves (NPOSR) financial statements as of September 30, 1995. The auditors have expressed an unqualified opinion on the 1995 statements. Their reports on the NPOSR internal control structure and compliance with laws and regulations are also provided.

NONE

1996-02-15T23:59:59.000Z

158

This document was downloaded on May 22, 2013 at 14:25:02 Author(s) Naval Postgraduate School (U.S.)  

E-Print Network (OSTI)

Offices 13 Curricula Summary 14-17 Faculty Organizations 17 Student Council 17 Selection Procedures 18, procedures and policies deemed worthy of attention. The OSAC is comprised of thirty-five student for the Navy's fully funded graduate education program. SELECTION PROCEDURES NAVAL OFFICERS Selection

159

Draft Environmental Impact Statement for a Container System for the Management of Naval Spent Nuclear Fuel EIS-0251  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Document ID 51 Document ID 51 Commenter: Daniel Nix - Western Interstate Energy Board, Colorado Response to Comment: A. The Navy extended the comment period from 45 to 60 days (ending July 18, 1996) in response to requests from the state of Nevada. A further extension could not be provided because of the need to complete the EIS to support actions required under a court agreement among the Department of Energy, Navy, and State of Idaho covering spent fuel management at the Idaho National Engineering Laboratory. B.&D. The Board's comment is correct that the EIS is limited to naval spent nuclear fuel and Navy- generated special case waste. The Board's comment is incorrect in the implication that transportation to Yucca Mountain is supported by the EIS. The proposed action of this EIS

160

Numerical overcooling in shocks  

E-Print Network (OSTI)

We present a study of cooling in radiative shocks simulated with smoothed particle hydrodynamics (SPH) and adaptive mesh refinement codes. We obtain a similarity solution for a shock-tube problem in the presence of radiative cooling, and test how well the solution is reproduced in Gadget and Flash. Shock broadening governed by the details of the numerical scheme (artificial viscosity or Riemann solvers) leads to potentially significant overcooling in both codes. We interpret our findings in terms of a resolution criterion, and apply it to realistic simulations of cosmological accretion shocks onto galaxy haloes, cold accretion and thermal feedback from supernovae or active galactic nuclei. To avoid numerical overcooling of accretion shocks onto haloes that should develop a hot corona requires a particle or cell mass resolution of 10^6 M_sun, which is within reach of current state-of-the-art simulations. At this mass resolution, thermal feedback in the interstellar medium of a galaxy requires temperatures of s...

Creasey, Peter; Bower, Richard G; Lacey, Cedric G

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "numerous naval propulsor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Protective Relays: Numerical Protective Relays  

Science Conference Proceedings (OSTI)

Protective relays are decision-making elements in the protection scheme for electrical power systems. Numerical relays offer many advantages over the traditional electromechanical types of devices. This guide provides an overview of numerical relays and discusses maintenance and testing.

2004-12-22T23:59:59.000Z

162

Numerical Dispersion of Gravity Waves  

Science Conference Proceedings (OSTI)

When atmospheric gravity waves are simulated in numerical models, they are not only dispersive for physical but also for numerical reasons. Their wave properties (e.g., damping or propagation speed and direction) can depend on grid spacing as ...

Guido Schroeder; K. Heinke Schlnzen

2009-12-01T23:59:59.000Z

163

Residual Stresses and Numerical Simulation  

Science Conference Proceedings (OSTI)

Oct 28, 2013 ... Advances in Hydroelectric Turbine Manufacturing and Repair: Residual Stresses and Numerical Simulation Sponsored by: Metallurgical...

164

The Navy seeks to identify responsible sources and obtain information in regard to purchasing renewable power for Naval Air Station (NAS) Fallon, located in Fallon, NV  

NLE Websites -- All DOE Office Websites (Extended Search)

REQUEST FOR INFORMATION (RFI) for Renewable Generation REQUEST FOR INFORMATION (RFI) for Renewable Generation Opportunities at NAWS China Lake, NAS Fallon, MCAGCC 29 Palms, and MCAS Yuma The Department of Navy (DoN) intends to issue a Request for Proposal (RFP) in early 2009 for renewable energy generation opportunities at Naval Air Weapons Station (NAWS) China Lake, California; Naval Air Station (NAS) Fallon, Nevada; Marine Corps Air Ground Combat Center (MCAGCC) Twentynine Palms, California, and Marine Corps Air Station (MCAS) Yuma, Arizona. The DoN will consider opportunities for the purchase of renewable power, developer wholesale generation, distributed generation, and the combination of those opportunities. Specifically, the Navy will provide Government land on these installations for large

165

Performance and Economics of a Wind-Diesel Hybrid Energy System: Naval Air Landing Field, San Clemente Island, California  

DOE Green Energy (OSTI)

This report provides an overview of the wind resource, economics and operation of the recently installed wind turbines in conjunction with diesel power for the Naval Air Landing Field (NALF), San Clemente Island (SCI), California Project. The primary goal of the SCI wind power system is to operate with the existing diesel power plant and provide equivalent or better power quality and system reliability than the existing diesel system. The wind system is also intended to reduce, as far as possible, the use of diesel fuel and the inherent generation of nitrogen-oxide emissions and other pollutants. The first two NM 225/30 225kW wind turbines were installed and started shake-down operations on February 5, 1998. This report describes the initial operational data gathered from February 1998 through January 1999, as well as the SCI wind resource and initial cost of energy provided by the wind turbines on SCI. In support of this objective, several years of data on the wind resources of San Clemente Island were collected and compared to historical data. The wind resource data were used as input to economic and feasibility studies for a wind-diesel hybrid installation for SCI.

McKenna, E. (National Renewable Energy Laboratory); Olsen, T. (Timothy Olsen Consulting)

1999-07-06T23:59:59.000Z

166

Proposed natural gas protection program for Naval Oil Shale Reserves Nos. 1 and 3, Garfield County, Colorado  

SciTech Connect

As a result of US Department of Energy (DOE) monitoring activities, it was determined in 1983 that the potential existed for natural gas resources underlying the Naval Oil Shales Reserves Nos. 1 and 3 (NOSrs-1 3) to be drained by privately-owned gas wells that were being drilled along the Reserves borders. In 1985, DOE initiated a limited number of projects to protect the Government's interest in the gas resources by drilling its own offset production'' wells just inside the boundaries, and by formally sharing in the production, revenues and costs of private wells that are drilled near the boundaries ( communitize'' the privately-drilled wells). The scope of these protection efforts must be expanded. DOE is therefore proposing a Natural Gas Protection Program for NOSRs-1 3 which would be implemented over a five-year period that would encompass a total of 200 wells (including the wells drilled and/or communitized since 1985). Of these, 111 would be offset wells drilled by DOE on Government land inside the NOSRs' boundaries and would be owned either entirely by the Government or communitized with adjacent private land owners or lessees. The remainder would be wells drilled by private operators in an area one half-mile wide extending around the NOSRs boundaries and communitized with the Government. 23 refs., 2 figs., 6 tabs.

1991-08-01T23:59:59.000Z

167

U.S. Department of Energy Naval Petroleum Reserve Number 1 quarterly financial statements, March 31, 1997 and 1996  

SciTech Connect

The report presents the results of the independent certified public accountants` review of the Department of Energy`s Naval Petroleum Reserve Number 1 interim financial statements as of March 31, 1997 and 1996. The review was done in accordance with Statements on Standards for Accounting and Review Services issued by the American Institute of Certified Public Accountants. A review of interim financial statements consist principally of inquires of NPR-1 personnel and analytical procedures applied to financial data. It is substantially less in scope than an audit in accordance with generally accepted auditing standards, the objective of which is the expression of an opinion regarding the financial statements taken as a whole. Accordingly, the certified public accountants do not express such an opinion. The auditors have stated that, except for the omission of certain disclosures, they are not aware of any material modifications that should be made to the financial statements in order for them to be in conformity with the other comprehensive basis of accounting described in Note 1 to the financial statements.

1997-04-17T23:59:59.000Z

168

U.S. Department of Energy Naval Petroleum Reserve Number 1 quarterly financial statements, December 31, 1996 and 1995  

SciTech Connect

The report presents the results of the independent certified public accountants` review of the Department of Energy`s Naval Petroleum Reserve Number 1 interim financial statements as of December 31, 1996 and 1995. The review was done in accordance with Statements on Standards for Accounting and Review Services issued by the American Institute of Certified Public Accountants. A review of interim financial statements consists principally of inquiries of NPR-1 personnel and analytical procedures applied to financial data. It is substantially less in scope than an audit in accordance with generally accepted auditing standards, the objective of which is the expression of an opinion regarding the financial statements take as a whole. Accordingly, the certified public accountants do not express such an opinion. The auditors have stated that, except for the omission of certain disclosures, they are not aware of any material modifications that should be made to the financial statements in order for them to be in conformity with the other comprehensive basis of accounting described in Note 1 to the financial statements.

1997-03-18T23:59:59.000Z

169

Numerical Modeling | Open Energy Information  

Open Energy Info (EERE)

Numerical Modeling Numerical Modeling Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Numerical Modeling Details Activities (8) Areas (2) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Data and Modeling Techniques Exploration Sub Group: Modeling Techniques Parent Exploration Technique: Modeling Techniques Information Provided by Technique Lithology: Stratigraphic/Structural: Stress fields and magnitudes Hydrological: Visualization and prediction of the flow patterns and characteristics of geothermal fluids Thermal: Thermal conduction and convection patterns in the subsurface Dictionary.png Numerical Modeling: A computer model that is designed to simulate and reproduce the mechanisms of a particular system. Other definitions:Wikipedia Reegle

170

Numerical Evaluation of Special Functions  

Science Conference Proceedings (OSTI)

... Series of Numerical Mathematics, vol. 112, Birkhuser Verlag, Basel, 1993, pp. 111--130. Gau93b W. Gautschi, On the ...

1995-04-07T23:59:59.000Z

171

Design and Analysis of Numerical Experiments  

Science Conference Proceedings (OSTI)

Calculations with numerical models are often referred to as numerical experiments, by analogy to classical laboratory experiments. Usually, many numerical experiments are carried out to determine the response of a numerical model to variations of ...

Kenneth P. Bowman; Jerome Sacks; Yue-Fang Chang

1993-05-01T23:59:59.000Z

172

Wind Power Plant Evaluation Naval Auxiliary Landing Field, San Clemente Island, California: Period of Performance 24 September 1999--15 December 2000  

DOE Green Energy (OSTI)

The purpose of this report is to evaluate the wind power benefits and impacts to the San Clement Island wind power system, including energy savings, emissions reduction, system stability, and decreased naval dependence on fossil fuel at the island. The primary goal of the SCI wind power system has been to operate with the existing diesel power plant and provide equivalent or better power quality and system reliability than the existing diesel system. The wind system is intended to reduce, as far as possible, the use of diesel fuel and the inherent generation of nitrogen oxide emissions and other pollutants.

Olsen, T.L.; Gulman, P.J.; McKenna, E.

2000-12-11T23:59:59.000Z

173

NUMERICAL VERIFICATION OF EQUILIBRIUM CHEMISTRY  

SciTech Connect

A numerical tool is in an advanced state of development to compute the equilibrium compositions of phases and their proportions in multi-component systems of importance to the nuclear industry. The resulting software is being conceived for direct integration into large multi-physics fuel performance codes, particularly for providing boundary conditions in heat and mass transport modules. However, any numerical errors produced in equilibrium chemistry computations will be propagated in subsequent heat and mass transport calculations, thus falsely predicting nuclear fuel behaviour. The necessity for a reliable method to numerically verify chemical equilibrium computations is emphasized by the requirement to handle the very large number of elements necessary to capture the entire fission product inventory. A simple, reliable and comprehensive numerical verification method is presented which can be invoked by any equilibrium chemistry solver for quality assurance purposes.

Piro, Markus [Royal Military College of Canada; Lewis, Brent [Royal Military College of Canada; Thompson, Dr. William T. [Royal Military College of Canada; Simunovic, Srdjan [ORNL; Besmann, Theodore M [ORNL

2010-01-01T23:59:59.000Z

174

Factor Separation in Numerical Simulations  

Science Conference Proceedings (OSTI)

A simple method is developed for computing the interactions among various factors influencing the atmospheric circulations. It is shown how numerical simulations can be utilized to obtain the pure contribution of any factor to any predicted field,...

U. Stein; P. Alpert

1993-07-01T23:59:59.000Z

175

Naval Station Newport Wind Resource Assessment. A Study Prepared in Partnership with the Environmental Protection Agency for the RE-Powering America's Land Initiative: Siting Renewable Energy on Potentially Contaminated Land and Mine Sites, and The Naval Facilities Engineering Service Center  

DOE Green Energy (OSTI)

The U.S. Environmental Protection Agency (EPA) launched the RE-Powering America's Land initiative to encourage development of renewable energy (RE) on potentially contaminated land and mine sites. EPA is collaborating with the U.S. Department of Energy's (DOE's) National Renewable Energy Laboratory (NREL) to evaluate RE options at Naval Station (NAVSTA) Newport in Newport, Rhode Island where multiple contaminated areas pose a threat to human health and the environment. Designated a superfund site on the National Priorities List in 1989, the base is committed to working toward reducing the its dependency on fossil fuels, decreasing its carbon footprint, and implementing RE projects where feasible. The Naval Facilities Engineering Service Center (NFESC) partnered with NREL in February 2009 to investigate the potential for wind energy generation at a number of Naval and Marine bases on the East Coast. NAVSTA Newport was one of several bases chosen for a detailed, site-specific wind resource investigation. NAVSTA Newport, in conjunction with NREL and NFESC, has been actively engaged in assessing the wind resource through several ongoing efforts. This report focuses on the wind resource assessment, the estimated energy production of wind turbines, and a survey of potential wind turbine options based upon the site-specific wind resource.

Robichaud, R.; Fields, J.; Roberts, J. O.

2012-02-01T23:59:59.000Z

176

DOE/EA-1583: Final Site-wide Environmental Assessment and Finding of No Significant Impact for Rocky Mountain Oilfield Testing Center/Naval Petroleum Reserve No. 3 (October 2008)  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

ROCKY MOUNTAIN OILFIELD TESTING CENTER / ROCKY MOUNTAIN OILFIELD TESTING CENTER / NAVAL PETROLEUM RESERVE NO. 3 FINAL Site-wide Environmental Assessment and Finding of No Significant Impact October 2008 U.S. Department of Energy Rocky Mountain Oilfield Testing Center 907 N. Poplar Street, Suite 150 Casper WY 82601 DOE/EA-1583 Rocky Mountain Oilfield Testing Center / Naval Petroleum Reserve No.3 Final Site-Wide Environmental Assessment i TABLE OF CONTENTS Section Page ABBREVIATIONS AND ACRONYMS.................................................................................................vii SUMMARY ................................................................................................................................................ix 1.0 INTRODUCTION .........................................................................................................................1

177

Annual Report: 2010-2011 Storm Season Sampling For NON-DRY DOCK STORMWATER MONITORING FOR PUGET SOUND NAVAL SHIPYARD, BREMERTON, WA  

SciTech Connect

This interim report summarizes the stormwater monitoring conducted for non-dry dock outfalls in both the confined industrial area and the residential areas of Naval Base Kitsap within the Puget Sound Naval Shipyard (referred to as the Shipyard). This includes the collection, analyses, and descriptive statistics for stormwater sampling conducted from November 2010 through April 2011. Seven stormwater basins within the Shipyard were sampled during at least three storm events to characterize non-dry dock stormwater discharges at selected stormwater drains located within the facility. This serves as the Phase I component of the project and Phase II is planned for the 2011-2012 storm season. These data will assist the Navy, USEPA, Ecology and other stakeholders in understanding the nature and condition of stormwater discharges from the Shipyard and inform the permitting process for new outfall discharges. The data from Phase I was compiled with current stormwater data available from the Shipyard, Sinclair/Dyes Inlet watershed, and Puget Sound in order to support technical investigations for the Draft NPDES permit. The permit would require storm event sampling at selected stormwater drains located within the Shipyard. However, the data must be considered on multiple scales to truly understand potential impairments to beneficial uses within Sinclair and Dyes Inlets.

Brandenberger, Jill M.; Metallo, David; Johnston, Robert K.; Gebhardt, Christine; Hsu, Larry

2012-09-01T23:59:59.000Z

178

Petroleum production at Maximum Efficient Rate Naval Petroleum Reserve No. 1 (Elk Hills), Kern County, California. Final Supplemental Environmental Impact Statement  

SciTech Connect

This document provides an analysis of the potential impacts associated with the proposed action, which is continued operation of Naval Petroleum Reserve No. I (NPR-1) at the Maximum Efficient Rate (MER) as authorized by Public law 94-258, the Naval Petroleum Reserves Production Act of 1976 (Act). The document also provides a similar analysis of alternatives to the proposed action, which also involve continued operations, but under lower development scenarios and lower rates of production. NPR-1 is a large oil and gas field jointly owned and operated by the federal government and Chevron U.SA Inc. (CUSA) pursuant to a Unit Plan Contract that became effective in 1944; the government`s interest is approximately 78% and CUSA`s interest is approximately 22%. The government`s interest is under the jurisdiction of the United States Department of Energy (DOE). The facility is approximately 17,409 acres (74 square miles), and it is located in Kern County, California, about 25 miles southwest of Bakersfield and 100 miles north of Los Angeles in the south central portion of the state. The environmental analysis presented herein is a supplement to the NPR-1 Final Environmental Impact Statement of that was issued by DOE in 1979 (1979 EIS). As such, this document is a Supplemental Environmental Impact Statement (SEIS).

Not Available

1993-07-01T23:59:59.000Z

179

Tag: Naval Reactors  

NLE Websites -- All DOE Office Websites (Extended Search)

9/all en "Cook"ing at Y-12 for 70 9/all en "Cook"ing at Y-12 for 70 years http://www.y12.doe.gov/employees-retirees/y-12-times/cooking-y-12-70-years

We have an enduring mission. Y-12 plays a key role in it. And a nuclear deterrent remains the ultimate insurance policy for America.

Naval electrochemical corrosion reducer  

DOE Patents (OSTI)

A corrosion reducer for use with ships having a hull, a propeller mounted a propeller shaft and extending through the hull, bearings supporting the shaft, at least one thrust bearing and one seal. The improvement includes a current collector and a current reduction assembly for reducing the voltage between the hull and shaft in order to reduce corrosion due to electrolytic action. The current reduction assembly includes an electrical contact, the current collector, and the hull. The current reduction assembly further includes a device for sensing and measuring the voltage between the hull and the shaft and a device for applying a reverse voltage between the hull and the shaft so that the resulting voltage differential is from 0 to 0.05 volts. The current reduction assembly further includes a differential amplifier having a voltage differential between the hull and the shaft. The current reduction assembly further includes an amplifier and a power output circuit receiving signals from the differential amplifier and being supplied by at least one current supply. The current selector includes a brush assembly in contact with a slip ring over the shaft so that its potential may be applied to the differential amplifier.

Clark, Howard L. (Ballston Lake, NY)

1991-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "numerous naval propulsor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

DEPARTMENT of NAVAL SCIENCE  

E-Print Network (OSTI)

. Hafner, Jr. riviana foods inc. Mr. Henry O. Hernandez Jr. (Rice BA '78) science applications Ann Hemann Mr. James Scott Herlong Ms. Sarah Luree Hernandez Mr. Samuel Lyle Hickerson Mr. John Mawuli Robert Reis Mr. John Stanley Reuwer Mr. Sean Patrick Riordan Mr. Dustin Derrick Roach Ms. Anne V. Robin

New Mexico, University of

182

Naval applications program  

SciTech Connect

This memorandum provides an discussion as to the possible application of nuclear ramjet propulsion in a submarine-based missile system. Questions are raised as to modifications required, compatibility with present submarine launch facilities, and missile and booster volume.

Hadley, J. W.

1962-06-13T23:59:59.000Z

183

Numerical Simulations of Black Holes  

E-Print Network (OSTI)

Numerical Simulations of Black Holes 26 Aug 2009 Frank Herrmann (fherrman@umd.edu) Department · merger of compact objects Much more than just black hole evolutions · Formulations · Hyperboloidal)/2.0; . . . high arithmetic intensity Operator Number of times used 12,961 + 5,398 - 3,438 / 69 14 #12;Black Hole

Maryland at College Park, University of

184

Numerical Analysis Gordon K. Smyth  

E-Print Network (OSTI)

to the fundamental ideas of numerical analysis is given by Stewart [11]. This article discusses the basic ideas be represented on a computer. There­in lies the fundamental difference between exact and com­ puter arithmetic, I. A. (1962). Handbook of mathematical functions. National Bureau of Stan­ dards, Washington

Smyth, Gordon K.

185

Numerical Analysis Gordon K. Smyth  

E-Print Network (OSTI)

]. An elegant and elementary introduction to the fundamental ideas of numerical analysis is given by Stewart [11 be represented on a computer. Therein lies the fundamental difference between exact and computer arithmetic] Abramowitz, M. & Stegun, I.A. (1962). Handbook of Mathematical Functions. National Bureau of Standards

Smyth, Gordon K.

186

Numerical length estimation for tubular flow reactors  

Science Conference Proceedings (OSTI)

Keywords: free boundary value problems, noniterative and iterative numerical methods, tubular flow reactors

Riccardo Fazio

1992-08-01T23:59:59.000Z

187

Handbook of numerical heat transfer  

Science Conference Proceedings (OSTI)

A comprehensive presentation is given of virtually all numerical methods that are suitable for the analysis of the various heat transverse and fluid flow problems that occur in research, practice, and university instruction. After reviewing basic methodologies, the following topics are covered: finite difference and finite element methods for parabolic, elliptic, and hyperbolic systems; a comparative appraisal of finite difference versus finite element methods; integral and integrodifferential systems; perturbation methods; Monte Carlo methods; finite analytic methods; moving boundary problems; inverse problems; graphical display methods; grid generation methods; and programing methods for supercomputers.

Minkowycz, W.J.; Sparrow, E.M.; Schneider, G.E.; Pletcher, R.H.

1988-01-01T23:59:59.000Z

188

Disruptive Innovation in Numerical Hydrodynamics  

Science Conference Proceedings (OSTI)

We propose the research and development of a high-fidelity hydrodynamic algorithm for tetrahedral meshes that will lead to a disruptive innovation in the numerical modeling of Laboratory problems. Our proposed innovation has the potential to reduce turnaround time by orders of magnitude relative to Advanced Simulation and Computing (ASC) codes; reduce simulation setup costs by millions of dollars per year; and effectively leverage Graphics Processing Unit (GPU) and future Exascale computing hardware. If successful, this work will lead to a dramatic leap forward in the Laboratory's quest for a predictive simulation capability.

Waltz, Jacob I. [Los Alamos National Laboratory

2012-09-06T23:59:59.000Z

189

Numerical Simulation of Macrosegregation Formation during ...  

Science Conference Proceedings (OSTI)

Direct Numerical Simulation of Inclusion Turbulent Deposition at Liquid ... Flow and Shrinkage Pipe Formation on Macrosegregation of Investment Cast -TiAl Alloys ... Numerical Modeling of the Interaction between a Foreign Particle an...

190

Numerical Differentiation and Integration - CECM - Simon Fraser ...  

E-Print Network (OSTI)

... ' &. $. %. Numerical Differentiation and Integration. Simon Fraser University ? Surrey Campus. MACM 316 ? Spring 2005. Instructor: Ha Le. 1...

191

Numerical simulations of strong gravitational fields  

Science Conference Proceedings (OSTI)

Solutions to the Einstein equations of general relativity are constructed using numerical methods on high performance computing platforms. This article reviews the methods used to obtain numerical solutions to the Einstein equations and discusses some results from recent numerical simulations of highly nonlinear cosmological spacetimes as well as for time dependent black holes that emit gravitational waves.

David W. Hobill

1995-01-01T23:59:59.000Z

192

Naval Petroleum and Oil Shale Reserves Combined Financial Statements September 30, 1994 and 1993 and Management Overview and Supplemental Financial and Management Information  

SciTech Connect

This report presents the results of the independent certified public accountant`s audit of the Department of Energy`s (Department) Naval Petroleum and Oil Shale Reserves (NPOSR) financial statements as of September 30, 1994. The auditors have expressed an unqualified opinion on the 1994 statements. Their reports on the NPOSR internal control structure and on compliance with laws and regulations, and management letter on addressing needed improvements are also provided. NPOSR consists of petroleum reserves in California and Wyoming, and oil shale reserves in Colorado and Utah. The Government`s interests in NPOSR are managed by the Department through its headquarters office in Washington, D.C. In addition, the Department has site offices in both California and Wyoming that are responsible for contractor oversight functions. Daily operations are conducted under contract by two management and operating contractors. By law, NPOSR was authorized to produce crude oil at the maximum efficient rate for six years. The law allowed production to be extended for three year periods, provided that the President of the United States certified that continued maximum production was in the best interest of the nation. The current three year period ends on April 5, 1997. Additional information about NPOSR is provided in the overview and notes to the financial statements.

1994-12-31T23:59:59.000Z

193

Study of alternatives for future operations of the naval petroleum and oil shale reserves, NOSR-2, Uintah and Carbon Counties, Utah. Final report  

SciTech Connect

The US Department of Energy (DOE) has asked Gustavson Associates, Inc. to serve as an Independent Petroleum Consultant and authorized a study and recommendations regarding future development of Naval Oil Shale Reserve No. 2 (NOSR-2) in Uintah and Carbon Counties, Utah. The US owns 100% of the mineral rights and about 60% of the surface rights in NOSR-2. The Ute Indian Tribe owns the other 40% of the surface. This 88,890-acre tract was set aside as an oil shale reserve for the US Navy by an Executive Order of President Wilson in 1916. Management of NOSR-2 is the responsibility of DOE. No drilling for oil and gas has occurred on the property and no production has been established. No reserves are present, although the area is hypothesized to overlay gas resources. Mapping by the US Geological Survey and others has resulted in speculative seismic leads for structures that may or may not hold conventional oil and gas. All of the mineral rights (including oil shale) must be considered exploratory and the mineral rights must be valued accordingly. The opinion recommended to maximize value to the US is Option 4, sale of the interest of the US of all or part of NOSR-2. Evaluation of this option results in an estimated value which is more than three times greater than the next highest estimated value, for Option 2, transfer to the Department of the Interior for leasing.

1996-12-01T23:59:59.000Z

194

LETTER REPORT. INDEPENDENT CONFIRMATORY SURVEY RESULTS OF SOILS ASSOCIATED WITH THE ARGYLE STREET SEWER LINE AT THE UNITED NUCLEAR CORPORATION NAVAL PRODUCTS SITE, NEW HAVEN, CONNECTICUT  

SciTech Connect

Oak Ridge Institute for Science and Education (ORISE) personnel visited the United Nuclear Corporation (UNC) Naval Products site on three separate occasions during the months of October and November 2011. The purpose of these visits was to conduct confirmatory surveys of soils associated with the Argyle Street sewer line that was being removed. Soil samples were collected from six different, judgmentally determined locations in the Argyle Street sewer trench. In addition to the six soil samples collected by ORISE, four replicate soil samples were collected by Cabrera Services, Inc. (CSI) for analysis by the ORISE laboratory. Replicate samples S0010 and S0011 were final status survey (FSS) bias samples; S0012 was an FSS systematic sample; and S0015 was a waste characterization sample. Six soil samples were also collected for background determination. Uranium-235 and uranium-238 concentrations were determined via gamma spectroscopy; the spectra were also reviewed for other identifiable photopeaks. Radionuclide concentrations for these soil samples are provided. In addition to the replicate samples and the samples collected by ORISE, CSI submitted three soil samples for inter-laboratory comparison analyses. One sample was from the background reference area, one was from waste characterization efforts (material inside the sewer line), and one was a FSS sample. The inter-laboratory comparison analyses results between ORISE and CSI were in agreement, except for one sample collected in the reference area. Smear results For Argyle Street sewer pipes are tabulated.

Adams, Wade C.

2012-01-24T23:59:59.000Z

195

Numerical Modeling and Optimization of Microstructure Evolution ...  

Science Conference Proceedings (OSTI)

Presentation Title, Numerical Modeling and Optimization of Microstructure Evolution ... A Hybrid Model on Low Energy Ion Beam Processing Leading to Phase...

196

MEMORANDUM OF UNDERSTANDING Between The Numerical Algorithms...  

NLE Websites -- All DOE Office Websites (Extended Search)

Numerical Algorithms Group Ltd (NAG) with a registered address at: Wilkinson House, Jordan hill Road, Oxford, UK and the University of California, as Management and Operating...

197

6.5.3.1. Numerical Examples  

Science Conference Proceedings (OSTI)

... immaterial. If you wish to try one method by hand, a very popular numerical method is the Gauss-Jordan method. Identity ...

2013-10-30T23:59:59.000Z

198

Numerical simulation of the active magnetic regenerator  

Science Conference Proceedings (OSTI)

A time-dependent one-dimensional model of the active magnetic regenerator (AMR) that takes into account most of the physical and practical design problems for the AMR is developed as a highly nonlinear system of partial differential equations. The adequateness ... Keywords: Active magnetic regenerator, Magnetic refrigerator, Modeling and numerical scheme, Numerical simulation, Passive regenerator

B. M. Siddikov; B. A. Wade; D. H. Schultz

2005-05-01T23:59:59.000Z

199

Waste glass melter numerical and physical modeling  

SciTech Connect

Results of physical and numerical simulation modeling of high-level liquid waste vitrification melters are presented. Physical modeling uses simulant fluids in laboratory testing. Visualization results provide insight into convective melt flow patterns from which information is derived to support performance estimation of operating melters and data to support numerical simulation. Numerical simulation results of several melter configurations are presented. These are in support of programs to evaluate melter operation characteristics and performance. Included are investigations into power skewing and alternating current electric field phase angle in a dual electrode pair reference design and bi-modal convective stability in an advanced design. 9 refs., 9 figs., 1 tab.

Eyler, L.L.; Peters, R.D.; Lessor, D.L.; Lowery, P.S.; Elliott, M.L.

1991-10-01T23:59:59.000Z

200

Initial Conditions for Numerical Relativity -- Introduction to numerical methods for solving elliptic PDEs  

E-Print Network (OSTI)

Numerical relativity became a powerful tool to investigate the dynamics of binary problems with black holes or neutron stars as well as the very structure of General Relativity. Although public numerical relativity codes are available to evolve such systems, a proper understanding of the methods involved is quite important. Here we focus on the numerical solution of elliptic partial differential equations. Such equations arise when preparing initial data for numerical relativity, but also for monitoring the evolution of black holes. Because such elliptic equations play an important role in many branches of physics, we give an overview of the topic, and show how to numerically solve them with simple examples and sample codes written in C++ and Fortran90 for beginners in numerical relativity or other fields requiring numerical expertise.

Hirotada Okawa

2013-08-15T23:59:59.000Z

Note: This page contains sample records for the topic "numerous naval propulsor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Template:IsNumeric | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Template Edit History Facebook icon Twitter icon » Template:IsNumeric Jump to: navigation, search This is the 'isNumeric' template. It combines a series of mediawiki hacks and work-arounds to determine if the supplied string is a number. This template will output either a 1 or a 0, and is intended for use with Parser Functions such as {{#if: .. }} or {{#expr: .. }} to perform logical or mathematical operations. Parameters str - The string to be tested. Usage It should be called in the following format: {{IsNumeric|42}} Examples & Logical Tests This template will produce the following results: {{IsNumeric|42}} -> 1

202

Distributed Numerical Weather Prediction via Satellite  

Science Conference Proceedings (OSTI)

This paper describes a recent undertaking in distributed numerical weather prediction via high data rate networks. The governing project involved the operation of a coupled mesoscale modeling system on widely separated supercomputers, and ...

Jordan G. Powers; Mark T. Stoelinga; William S. Boyd

1997-12-01T23:59:59.000Z

203

Numerical Simulations of Hurricane-Generated Currents  

Science Conference Proceedings (OSTI)

The work described here involves the application of a three-dimensional numerical circulation model to the hindcasting of currents generated during two stormsTropical Storm Delia and Hurricane Anita. Reasonably high-quality current and other ...

Cortis Cooper; Bryan Pearce

1982-10-01T23:59:59.000Z

204

Numerical Simulation of Sudden Stratospheric Warmings  

Science Conference Proceedings (OSTI)

A mechanistic, quasi-geostrophic, semi-spectral model with a self-consistent calculation of the mean zonal flow fields is used to numerically simulate sudden stratospheric warmings generated by a single zonal harmonic (m) planetary wave. The ...

Mark R. Schoeberl; Darrell F. Strobel

1980-01-01T23:59:59.000Z

205

Statistical Significance Testing in Numerical Weather Prediction  

Science Conference Proceedings (OSTI)

Experiments are often performed with numerical forecast models to determine the response to a changed model formulation, initial conditions or boundary conditions. Such experiments are inherently subject to sampling error and it is not always ...

Roger Daley; Robert M. Chervin

1985-05-01T23:59:59.000Z

206

Numerical models for high beta magnetohydrodynamic flow  

Science Conference Proceedings (OSTI)

The fundamentals of numerical magnetohydrodynamics for highly conducting, high-beta plasmas are outlined. The discussions emphasize the physical properties of the flow, and how elementary concepts in numerical analysis can be applied to the construction of finite difference approximations that capture these features. The linear and nonlinear stability of explicit and implicit differencing in time is examined, the origin and effect of numerical diffusion in the calculation of convective transport is described, and a technique for maintaining solenoidality in the magnetic field is developed. Many of the points are illustrated by numerical examples. The techniques described are applicable to the time-dependent, high-beta flows normally encountered in magnetically confined plasmas, plasma switches, and space and astrophysical plasmas. 40 refs.

Brackbill, J.U.

1987-01-01T23:59:59.000Z

207

Numerical Transform Inversion Using Gaussian Quadrature  

Science Conference Proceedings (OSTI)

Numerical inversion of Laplace transforms is a powerful tool in computational probability. It greatly enhances the applicability of stochastic models in many fields. In this article we present a simple Laplace transform inversion algorithm that can compute ...

Peter Den Iseger

2006-01-01T23:59:59.000Z

208

Thunderstorm ElectrificationA Numerical Study  

Science Conference Proceedings (OSTI)

The results of a numerical model of thunderstorm electrification that includes riming electrification compare favorably with many cloud observations. A strong electric charge accumulates through two major stages in the cloud: Stage 1 occurs near ...

Tsutomu Takahashi

1984-09-01T23:59:59.000Z

209

A Numerical Model of the Ventilated Thermocline  

Science Conference Proceedings (OSTI)

A steady state numerical solution is found for an idealized, rectangular ocean basin driven by wind and surface buoyancy flux. A three-dimensional primitive equation model is used. In agreement with recent analytical modeling, the thermocline in ...

Michael D. Cox; Kirk Bryan

1984-04-01T23:59:59.000Z

210

Johnnie DeLoach Naval Materials Division Office of Naval ...  

Science Conference Proceedings (OSTI)

... Reliable Survivable Fuel Efficient Affordable (broad market demand) ... Shorten Design-to-Production Cycle Affordable Manufacturing Processes ...

2013-07-11T23:59:59.000Z

211

NAVAL POSTGRADUATE SCHOOL Monterey, California  

E-Print Network (OSTI)

PAGE INTENTIONALLY LEFT BLANK #12;i REPORT DOCUMENTATION PAGE Form Approved OMB No. 0704-0188 Public reporting burden for this collection of information is estimated to average 1 hour per response, including, Paperwork Reduction Project (0704-0188) Washington DC 20503. 1. AGENCY USE ONLY (Leave blank) 2. REPORT DATE

212

NAVAL POSTGRADUATE SCHOOL Monterey, California  

E-Print Network (OSTI)

-4302, and to the Office of Management and Budget, Paperwork Reduction Project (0704-0188) Washington DC 20503. 1. AGENCYNAVAL POSTGRADUATE SCHOOL Monterey, California THESIS WINDOWS XP OPERATING SYSTEM SECURITY ANALYSIS of information, including suggestions for reducing this burden, to Washington headquarters Services, Directorate

213

Numerical modeling of liquid geothermal systems  

DOE Green Energy (OSTI)

A mathematical model describing the physical behavior of hot-water geothermal systems is presented. The model consists of a set of coupled partial differential equations for heat and mass transfer in porous media and an equation of state relating fluid density to temperature and pressure. The equations are solved numerically using an integrated finite difference method which can treat arbitrary nodal configurations in one, two, or three dimensions. The model is used to analyze cellular convection in permeable rock layers heated from below. Results for cases with constant fluid and rock properties are in good agreement with numerical and experimental results from other authors.

Sorey, M.L.

1978-01-01T23:59:59.000Z

214

Numerical simulation of an electroweak oscillon  

Science Conference Proceedings (OSTI)

Numerical simulations of the bosonic sector of the SU(2)xU(1) electroweak standard model in 3+1 dimensions have demonstrated the existence of an oscillon--an extremely long-lived, localized, oscillatory solution to the equations of motion--when the Higgs mass is equal to twice the W{sup {+-}} boson mass. It contains total energy roughly 30 TeV localized in a region of radius 0.05 fm. A detailed description of these numerical results is presented.

Graham, N. [Department of Physics, Middlebury College, Middlebury, Vermont 05753 (United States)

2007-10-15T23:59:59.000Z

215

Numerical Simulation of Electro-magnetic Turbulent Inhibitor ...  

Science Conference Proceedings (OSTI)

Numerical Modeling of Centrifugally Cast HSS Rolls Numerical Simulation of Electro-magnetic Turbulent Inhibitor Technology in a Tundish Optimizing the...

216

13.024 Numerical Marine Hydrodynamics, Spring 2003  

E-Print Network (OSTI)

Introduction to numerical methods: interpolation, differentiation, integration, systems of linear equations. Solution of differential equations by numerical integration, partial differential equations of inviscid hydrodynamics: ...

Milgram, Jerome H.

217

Numeric simulation of faults in electrical networks  

Science Conference Proceedings (OSTI)

In the paper is presented a virtual simulator for three-phased medium voltage electric circuits. The simulator allows analyzing transient regimes caused by the faults produced in electric distribution networks (simple grounding, double grounding, broken ... Keywords: faults in electric network, numerical simulation, three phased circuits, transient regimes

Toader Dumitru; Haragus Stefan; Blaj Constantin

2009-03-01T23:59:59.000Z

218

A numerical sensitivity analysis of streamline simulation  

E-Print Network (OSTI)

Nowadays, field development strategy has become increasingly dependent on the results of reservoir simulation models. Reservoir studies demand fast and efficient results to make investment decisions that require a reasonable trade off between accuracy and simulation time. One of the suitable options to fulfill this requirement is streamline reservoir simulation technology, which has become very popular in the last few years. Streamline (SL) simulation provides an attractive alternative to conventional reservoir simulation because SL offers high computational efficiency and minimizes numerical diffusion and grid orientation effects. However, streamline methods have weaknesses incorporating complex physical processes and can also suffer numerical accuracy problems. The main objective of this research is to evaluate the numerical accuracy of the latest SL technology, and examine the influence of different factors that may impact the solution of SL simulation models. An extensive number of numerical experiments based on sensitivity analysis were performed to determine the effects of various influential elements on the stability and results of the solution. Those experiments were applied to various models to identify the impact of factors such as mobility ratios, mapping of saturation methods, number of streamlines, time step sizes, and gravity effects. This study provides a detailed investigation of some fundamental issues that are currently unresolved in streamline simulation.

Chaban Habib, Fady Ruben

2004-12-01T23:59:59.000Z

219

Cloud Interactions and Merging: Numerical Simulations  

Science Conference Proceedings (OSTI)

A total of 48 numerical experiments have been performed to study cloud interactions and merging by means of a two-dimensional multi-cell model. Two soundings of deep convection during GATE and two different magnitudes of large-scale lifting.have ...

Wei-Kuo Tao; Joanne Simpson

1984-10-01T23:59:59.000Z

220

Graduate Survey of Numerical Methods Background material  

E-Print Network (OSTI)

as reliability goes, there are the two fundamental principles: 1. A good numerical method will give you nearly the most fundamental notion is that of continuity. Mathematically, a function f(x) is continuous at x. Handbook of Writing for the Mathematical Sciences. SIAM, 1997. [3] L. Hogben. Handbook of linear algebra

Corless, Robert M.

Note: This page contains sample records for the topic "numerous naval propulsor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Numerical Object Oriented Quantum Field Theory Calculations  

E-Print Network (OSTI)

The qft++ package is a library of C++ classes that facilitate numerical (not algebraic) quantum field theory calculations. Mathematical objects such as matrices, tensors, Dirac spinors, polarization and orbital angular momentum tensors, etc. are represented as C++ objects in qft++. The package permits construction of code which closely resembles quantum field theory expressions, allowing for quick and reliable calculations.

M. Williams

2008-05-19T23:59:59.000Z

222

Microcomputer Numerical Ocean Surface Wave Model  

Science Conference Proceedings (OSTI)

A numerical wean surface wave model has been developed specifically to operate on desktop super micro-computers. The model uses one or more local and moving grids within which waves of importance at a location of interest are generated. Within ...

Marshall D. Earle

1989-02-01T23:59:59.000Z

223

Numerical Simulations of the Wake of Kauai  

Science Conference Proceedings (OSTI)

This study uses a series of numerical simulations to examine the structure of the wake of the Hawaiian island of Kauai. The primary focus is on the conditions on 26 June 2003, which was the day of the demise of the Helios aircraft within Kauais ...

Todd P. Lane; Robert D. Sharman; Rod G. Frehlich; John M. Brown

2006-09-01T23:59:59.000Z

224

COLIN: planning with continuous linear numeric change  

Science Conference Proceedings (OSTI)

In this paper we describe COLIN, a forward-chaining heuristic search planner, capable of reasoning with COntinuous LINear numeric change, in addition to the full temporal semantics of PDDL2.1. Through this work we make two advances to the state-of-the-art ...

Amanda Coles; Andrew Coles; Maria Fox; Derek Long

2012-05-01T23:59:59.000Z

225

Efficient numerical modeling of borehole heat exchangers  

Science Conference Proceedings (OSTI)

This paper presents a finite element modeling technique for double U-tube borehole heat exchangers (BHE) and the surrounding soil mass. Focus is placed on presenting numerical analyses describing the capability of a BHE model, previously reported, to ... Keywords: BHE, Geothermal heat pumps, Geothermic, Heat transfer, Space heating

R. Al-Khoury; T. Klbel; R. Schramedei

2010-10-01T23:59:59.000Z

226

Direct numerical simulation of evaporating droplets  

Science Conference Proceedings (OSTI)

A model for the three-dimensional direct numerical simulation of evaporating, deforming droplets in incompressible flow is presented. It is based on the volume-of-fluid method and is therefore capable of capturing very strong deformations. The evaporation ... Keywords: DNS, Deformed droplets, Evaporation, Multiphase flow, Stefan flow, VOF

Jan Schlottke; Bernhard Weigand

2008-05-01T23:59:59.000Z

227

Study of detonation process: numerical approach  

Science Conference Proceedings (OSTI)

This paper is based on non-linear finite element analysis of the effects of the blast wave on structures, caused by the detonation of explosive materials. Dynamic response of a pipeline subjected to the shock wave produced by the detonation of high explosive ... Keywords: blast, coupling, explosive, numerical analysis, pipeline, safety

Jerzy Malachowski

2008-09-01T23:59:59.000Z

228

Vettor Fausto (1490-1546), Professor of Greek and a Naval Architect: A New Light on the 16th-century Manuscript Misure di vascelli etc. diproto dellArsenale di Venetia  

E-Print Network (OSTI)

This thesis investigates the significant role that the Venetian humanist Vettor Fausto (1490-1546), professor of Greek at the School of Saint Mark, played during the first half of the 16th century in Venetian naval architecture. Early in the 16th century, the maritime power of Venice was seriously threatened by the Ottoman Sultan Suleiman II in the East and by the Holy Roman Emperor Charles V in the West. In order to regain its naval power in the Mediterranean, the Republic of Venice strongly encouraged Venetian shipwrights to submit new designs for war galleys. The undisputed founder and champion of this naval program was not a skilled shipwright but a young professor of Greek in the School of Saint Mark named Vettor Fausto, who in the heat of this renewal programme, proposed marine architecture as a new scientia. In 1529, Vettor Fausto built a quinqueremis whose design, he claimed, was based upon the quinquereme used by the Romans during their wars and that he had derived the shipbuilding proportions from the most ancient Greek manuscripts. The recovery of Classical traditions resulted in major changes in many fields. It included shipbuilding practices as well, especially after Fausto introduced in the Venetian Arsenal a new scientia, that of marine architecture, in opposition to the fabrilis peritia, the empirical shipbuilding practice. This work examines several Renaissance sources and archival material in order to illuminate the technical features and the design of Faustos quinquereme. Based on the study of the anonymous 16th-century Venetian manuscript Misure di vascelli etc. diproto dellArsenale di Venetia from the State Archive of Venice, this thesis presents a general overview of Faustos life and his cultural background in order to better understand the humanistic foundations that led him to propose the construction of the quinquereme. Also presented in this thesis is a theoretical reconstruction of Faustos quinquereme and the suggestion that the shipbuilding instructions contained in the anonymous manuscript are connected to the work of Fausto in the Venetian Arsenal.

Campana, Lilia 1975-

2010-12-01T23:59:59.000Z

229

numerical modeling | OpenEI Community  

Open Energy Info (EERE)

07 07 Varnish cache server Home Groups Community Central Green Button Applications Developer Utility Rate FRED: FRee Energy Database More Public Groups Private Groups Features Groups Blog posts Content Stream Documents Discussions Polls Q & A Events Notices My stuff Energy blogs 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load) Guru Meditation: XID: 2142233807 Varnish cache server numerical modeling Home Ocop's picture Submitted by Ocop(5) Member 18 April, 2013 - 13:41 MHK LCOE Reporting Guidance Draft Cost Current DOE LCOE numerical modeling Performance Tidal Wave To normalize competing claims of LCOE, DOE has developed-for its own use-a standardized cost and performance data reporting process to facilitate uniform calculation of LCOE from MHK device developers. This

230

Definition: Numerical Modeling | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: Numerical Modeling Jump to: navigation, search Dictionary.png Numerical Modeling A computer model that is designed to simulate and reproduce the mechanisms of a particular system.[1] View on Wikipedia Wikipedia Definition A computer simulation, a computer model, or a computational model is a computer program, run on a single computer, or a network of computers, that attempts to simulate an abstract model of a particular system. Computer simulations have become a useful part of mathematical modeling of many natural systems in physics, astrophysics, chemistry and biology, human systems in economics, psychology, social science, and engineering. Simulation of a system is represented as the running of the system's model.

231

Numerical solution of the spray equation  

SciTech Connect

The spray equation has been solved numerically using a statistical approach. The method has been applied to physical systems where all three space coordinates are independent, in an internal combustion engine with asymmetric liquid fuel injection. For physical configurations in which some degree of symmetry exists, the numerical model is simplified, at a considerable savings in computer time. Difference equations are derived for the spray equation in one, two, and three dimensions. In three dimensions the equations are given in Cartesian and cylindrical coordinates. Quantities of physical interest which can be calculated from the droplet distribution function are defined. Coupling terms for use in combined spray-gas phase hydrodynamics models are derived, conserving the total mass, momentum, and energy of the two-phase system. The spray model is extended to allow for denser sprays in which the thin spray approximation is no longer valid.

Westbrook, C.K.

1976-11-01T23:59:59.000Z

232

Numerical simulation of magma energy extraction  

DOE Green Energy (OSTI)

The Magma Energy Program is a speculative endeavor regarding practical utility of electrical power production from the thermal energy which reside in magma. The systematic investigation has identified an number of research areas which have application to the utilization of magma energy and to the field of geothermal energy. Eight topics were identified which involve thermal processes and which are areas for the application of the techniques of numerical simulation. These areas are: (1) two-phase flow of the working fluid in the wellbore, (2) thermodynamic cycles for the production of electrical power, (3) optimization of the entire system, (4) solidification and fracturing of the magma caused by the energy extraction process, (5) heat transfer and fluid flow within an open, direct-contact, heat-exchanger, (6) thermal convection in the overlying geothermal region, (7) thermal convection within the magma body, and (8) induced natural convection near the thermal energy extraction device. Modeling issues have been identified which will require systematic investigation in order to develop the most appropriate strategies for numerical simulation. It appears that numerical simulations will be of ever increasing importance to the study of geothermal processes as the size and complexity of the systems of interest increase. It is anticipated that, in the future, greater emphasis will be placed on the numerical simulation of large-scale, three-dimensional, transient, mixed convection in viscous flows and porous media. Increased computational capabilities, e.g.; massively parallel computers, will allow for the detailed study of specific processes in fractured media, non-Darcy effects in porous media, and non-Newtonian effects. 23 refs., 13 figs., 1 tab.

Hickox, C.E.

1991-01-01T23:59:59.000Z

233

Numerical simulation of the solar granulation  

Science Conference Proceedings (OSTI)

The solar granulation has been simulated by numerical solution of the multidimensional, time-dependent, nonlinear Navier-Stokes equations applied to the solar atmosphere. Granules may be explained as buoyantly rising bubbles created at the level where T = 8000 K, and which have collapsed into vortex rings. The calculation is in quantitative agreement with observations and has a number of implications for solar physics and convection theory.

Cloutman, L.D.

1980-08-01T23:59:59.000Z

234

Exploring the Outer Limits of Numerical Relativity  

E-Print Network (OSTI)

We perform several black-hole binary evolutions using fully nonlinear numerical relativity techniques at separations large enough that low-order post-Newtonian expansions are expected to be accurate. As a case study, we evolve an equal-mass nonspinning black-hole binary from a quasicircular orbit at an initial coordinate separation of D=100M for three different resolutions. We find that the orbital period of this binary (in the numerical coordinates) is T=6422M. The orbital motion agrees with post-Newtonian predictions to within 1%. Interestingly, we find that the time derivative of the coordinate separation is dominated by a purely gauge effect leading to an apparent contraction and expansion of the orbit at twice the orbital frequency. Based on these results, we improved our evolution techniques and studied a set of black hole binaries in quasi-circular orbits starting at D=20M, D=50M, and D=100M for ~ 5, 3, and 2 orbits, respectively. We find good agreement between the numerical results and post-Newtonian predictions for the orbital frequency and radial decay rate, radiated energy and angular momentum, and waveform amplitude and phases. The results are relevant for the future computation of long-term waveforms to assist in the detection and analysis of gravitational waves by the next generation of detectors as well as the long-term simulations of black-hole binaries required to accurately model astrophysically realistic circumbinary accretion disks.

Carlos O. Lousto; Yosef Zlochower

2013-04-14T23:59:59.000Z

235

Numerical Schemes for Rough Parabolic Equations  

SciTech Connect

This paper is devoted to the study of numerical approximation schemes for a class of parabolic equations on (0,1) perturbed by a non-linear rough signal. It is the continuation of Deya (Electron. J. Probab. 16:1489-1518, 2011) and Deya et al. (Probab. Theory Relat. Fields, to appear), where the existence and uniqueness of a solution has been established. The approach combines rough paths methods with standard considerations on discretizing stochastic PDEs. The results apply to a geometric 2-rough path, which covers the case of the multidimensional fractional Brownian motion with Hurst index H>1/3.

Deya, Aurelien, E-mail: deya@iecn.u-nancy.fr [Universite de Nancy 1, Institut Elie Cartan Nancy (France)

2012-04-15T23:59:59.000Z

236

Getting a kick out of numerical relativity  

E-Print Network (OSTI)

Recent developments in numerical relativity have made it possible to follow reliably the coalescence of two black holes from near the innermost stable circular orbit to final ringdown. This opens up a wide variety of exciting astrophysical applications of these simulations. Chief among these is the net kick received when two unequal mass or spinning black holes merge. The magnitude of this kick has bearing on the production and growth of supermassive black holes during the epoch of structure formation, and on the retention of black holes in stellar clusters. Here we report the first accurate numerical calculation of this kick, for two nonspinning black holes in a 1.5:1 mass ratio, which is expected based on analytic considerations to give a significant fraction of the maximum possible recoil. Our estimated kick is 105 km/s with an error of less than 10%. This is intermediate between the estimates from two recent post-Newtonian analyses and suggests that at redshifts z > 10, halos with masses < 10^9 M_sun w...

Baker, J G; Choi, D I; Koppitz, M; Miller, M C; Van Meter, J R; Baker, John G.; Centrella, Joan; Choi, Dae-Il; Koppitz, Michael; Meter, James R. van

2006-01-01T23:59:59.000Z

237

Getting a kick out of numerical relativity  

E-Print Network (OSTI)

Recent developments in numerical relativity have made it possible to follow reliably the coalescence of two black holes from near the innermost stable circular orbit to final ringdown. This opens up a wide variety of exciting astrophysical applications of these simulations. Chief among these is the net kick received when two unequal mass or spinning black holes merge. The magnitude of this kick has bearing on the production and growth of supermassive black holes during the epoch of structure formation, and on the retention of black holes in stellar clusters. Here we report the first accurate numerical calculation of this kick, for two nonspinning black holes in a 1.5:1 mass ratio, which is expected based on analytic considerations to give a significant fraction of the maximum possible recoil. We have performed multiple runs with different initial separations, orbital angular momenta, resolutions, extraction radii, and gauges. The full range of our kick speeds is 86--116 km s$^{-1}$, and the most reliable runs give kicks between 86 and 97 km s$^{-1}$. This is intermediate between the estimates from two recent post-Newtonian analyses and suggests that at redshifts $z\\gtrsim 10$, halos with masses $\\lesssim 10^9 M_\\odot$ will have difficulty retaining coalesced black holes after major mergers.

John G. Baker; Joan Centrella; Dae-Il Choi; Michael Koppitz; James R. van Meter; M. Coleman Miller

2006-03-08T23:59:59.000Z

238

Numerical Analysis of Electromagnetic Field in an Electroslag ...  

Science Conference Proceedings (OSTI)

Direct Numerical Simulation of Inclusion Turbulent Deposition at Liquid ... Flow and Shrinkage Pipe Formation on Macrosegregation of Investment Cast -TiAl Alloys ... Numerical Modeling of the Interaction between a Foreign Particle an...

239

Numerical Analysis of the Influence of Melting and Application of ...  

Science Conference Proceedings (OSTI)

Direct Numerical Simulation of Inclusion Turbulent Deposition at Liquid ... Flow and Shrinkage Pipe Formation on Macrosegregation of Investment Cast -TiAl Alloys ... Numerical Modeling of the Interaction between a Foreign Particle an...

240

Application of Transilient Turbulence Theory to Mesoscale Numerical Weather Forecasting  

Science Conference Proceedings (OSTI)

In this study we show that a unified turbulence parameterization, when divorced from the smoothing procedures needed for numerical stability of the host model, can be implemented in a numerical weather prediction model. Our host model is the 15-...

William H. Raymond; Roland B. Stull

1990-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "numerous naval propulsor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Numerical Model Studies of Long-Period Edge Waves  

Science Conference Proceedings (OSTI)

A numerical modeling study of aspects of the generation and propagation of long-period edge waves along a continental shelf is described. The numerical model is based on the traditional shallow-water dynamics. A scale analysis indicates that ...

F. A. Shillington; D. Van Foreest

1986-08-01T23:59:59.000Z

242

A Numerical Benchmark on the Prediction of Macrosegregation in ...  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2011 TMS Annual Meeting & Exhibition. Symposium , Frontiers in Solidification Science. Presentation Title, A Numerical Benchmark...

243

Numerical Evaluation of Energy Transfer during Surface Mechanical ...  

Science Conference Proceedings (OSTI)

Presentation Title, Numerical Evaluation of Energy Transfer during Surface Mechanical .... Extensible, Self-Optimizing Phase Equilibrium Infrastructure ( ESPEI):...

244

Computational aspects in numerical simulation of skin tissues  

Science Conference Proceedings (OSTI)

The aim of this paper is to present some computational aspects in numerical simulation of the human skin tissue. A multi-layered model is considered for the skin tissue with emphasis on the mathematical modelling and numerical models in space 2D and ... Keywords: biothermomechanics, coupled problems, finite element method, numerical methods, skin tissue, thermal systems

Iulia Maria Crstea; Ion Crstea

2010-04-01T23:59:59.000Z

245

Linear algebra operators for GPU implementation of numerical algorithms  

Science Conference Proceedings (OSTI)

In this work, the emphasis is on the development of strategies to realize techniques of numerical computing on the graphics chip. In particular, the focus is on the acceleration of techniques for solving sets of algebraic equations as they occur in numerical ... Keywords: graphics hardware, numerical simulation

Jens Krger; Rdiger Westermann

2003-07-01T23:59:59.000Z

246

Numerical homogenization on approach for stokesian suspensions.  

SciTech Connect

In this technical report we investigate efficient methods for numerical simulation of active suspensions. The prototypical system is a suspension of swimming bacteria in a Newtonian fluid. Rheological and other macroscopic properties of such suspensions can differ dramatically from the same properties of the suspending fluid alone or of suspensions of similar but inactive particles. Elongated bacteria, such as E. coli or B. subtilis, swim along their principal axis, propelling themselves with the help of flagella, attached at the anterior of the organism and pushing it forward in the manner of a propeller. They interact hydrodynamically with the surrounding fluid and, because of their asymmetrical shape, have the propensity to align with the local flow. This, along with the dipolar nature of bacteria (the two forces a bacterium exerts on a fluid - one due to self-propulsion and the other opposing drag - have equal magnitude and point in opposite directions), causes nearby bacteria to tend to align, resulting in a intermittent local ordering on the mesoscopic scale, which is between the microscopic scale of an individual bacterium and the macroscopic scale of the suspension (e.g., its container). The local ordering is sometimes called a collective mode or collective swimming. Thanks to self-propulsion, collective modes inject momentum into the fluid in a coherent way. This enhances the local strain rate without changing the macroscopic stress applied at the boundary of the container. The macroscopic effective viscosity of the suspension is defined roughly as the ratio of the applied stress to the bulk strain rate. If local alignment and therefore local strain-rate enhancement, are significant, the effective viscosity can be appreciably lower than that of the corresponding passive suspension or even of the surrounding fluid alone. Indeed, a sevenfold decrease in the effective viscosity was observed in experiments with B. subtilis. More generally, local collective swimming resulting from bacterial alignment can significantly alter other macroscopic properties of the suspension, such as the oxygen diffusivity and mixing rates. In order to understand the unique macroscopic properties of active suspensions the connection between microscopic swimming and alignment dynamics and the mesoscopic pattern formation must be clarified. This is difficult to do analytically in the fully general setting of moderately dense suspensions, because of the large number of bacteria involved (approx. 10{sup 10} cm{sup -3} in experiments) and the complex, time-dependent geometry of the system. Many reduced analytical models of bacterial have been proposed, but all of them require validation. While comparison with experiment is the ultimate test of a model's fidelity, it is difficult to conduct experiments matched to these models assumptions. Numerical simulation of the microscopic dynamics is an acceptable substitute, but it runs into the problem of having to discretize the fluid domain with a fine-grained boundary (the bacteria) and update the discretization as the domain evolves (bacteria move). This leads to a prohibitively high number of degrees of freedom and prohibitively high setup costs per timestep of simulation. In this technical report we propose numerical methods designed to alleviate these two difficulties. We indicate how to (1) construct an optimal discretization in terms of the number of degrees of freedom per digit of accuracy and (2) optimally update the discretization as the simulation evolves. The technical tool here is the derivation of rigorous error bounds on the error in the numerical solution when using our proposed discretization at the initial time as well as after a given elapsed simulation time. These error bounds should guide the construction of practical discretization schemes and update strategies. Our initial construction is carried out by using a theoretically convenient, but practically prohibitive spectral basis, which is a Galerkin basis of functions with global support. At the end of this report we propose loc

Haines, B. M.; Berlyand, L. V.; Karpeev, D. A. (Mathematics and Computer Science); (Department of Mathematics, Pennsylvania State Univ.)

2012-01-20T23:59:59.000Z

247

Numerical Investigations of Kuiper Belt Binaries  

E-Print Network (OSTI)

Observations of the Kuiper Belt indicate that a larger than expected percentage of KBO's (approximately 8 out of 500) are in binary pairs. The formation and survival of such objects presents a conundrum [1]. Two competing theories have been postulated to try to solve this problem. One entails the physical collision of bodies [2] while the other utilizes dynamical friction or a third body to dissipate excess momentum and energy from the system [3]. Although in general known binaries tend to differ significantly in mass, such as seen in the Earth-Moon or asteroid binary systems [4], Kuiper binaries discovered to date tend to instead be of similar size [5, 6]. This paper investigates the stability, development and lifetimes for Kuiper Belt binaries by tracking their orbital dynamics and subsequent evolution. Section two details the numerical model while Section three discusses the initial conditions. Finally, in Section four the results are discussed with Section five containing the conclusions.

R. C. Nazzario; T. W. Hyde

2005-01-20T23:59:59.000Z

248

NUMERICAL MODELING OF CATHODE CONTACT MATERIAL DENSIFICATION  

Science Conference Proceedings (OSTI)

Numerical modeling was used to simulate the constrained sintering process of the cathode contact layer during assembly of solid oxide fuel cells (SOFCs). A finite element model based on the continuum theory for sintering of porous bodies was developed and used to investigate candidate low-temperature cathode contact materials. Constitutive parameters for various contact materials under investigation were estimated from dilatometry screening tests, and the influence of processing time, processing temperature, initial grain size, and applied compressive stress on the free sintering response was predicted for selected candidate materials. The densification behavior and generated stresses within a 5-cell planar SOFC stack during sintering, high temperature operation, and room temperature shutdown were predicted. Insufficient constrained densification was observed in the stack at the proposed heat treatment, but beneficial effects of reduced grain size, compressive stack preload, and reduced thermal expansion coefficient on the contact layer densification and stresses were observed.

Koeppel, Brian J.; Liu, Wenning N.; Stephens, Elizabeth V.; Khaleel, Mohammad A.

2011-11-01T23:59:59.000Z

249

Numerical simulation of fueling in tokamaks  

DOE Green Energy (OSTI)

We describe the numerical simulation of fueling and particle transport in both present and future tokamak plasmas. Models for pellet ablation and plasma density behavior after pellet injection are compared with experimental results in ISX and PDX plasmas and then extended to fusion reactor conditions. The role of fast ion ablation due to intense neutral beam injection and fusion alphas is examined along with pellet size and velocity considerations. In plasmas with high pumping efficiency (which may be obtained with divertor operation), pellet injection can significantly reduce fueling rates while maintaining more flexibility in control of the density profile than afforded by gas puffing. When fueling is dominated by gas puffing or high recycle from the walls or limiter, control of the fueling and density profiles is reduced and particle fluxes to the wall increase.

Attenberger, S.E.; Houlberg, W.A.; Milora, S.L.

1982-04-01T23:59:59.000Z

250

Very high numerical aperture light transmitting device  

DOE Patents (OSTI)

A new light-transmitting device using a SCIN glass core and a novel calcium sodium cladding has been developed. The very high index of refraction, radiation hardness, similar solubility for rare earths and similar melt and viscosity characteristics of core and cladding materials makes them attractive for several applications such as high-numerical-aperture optical fibers and specialty lenses. Optical fibers up to 60 m in length have been drawn, and several simple lenses have been designed, ground, and polished. Preliminary results on the ability to directly cast optical components of lead-indium phosphate glass are also discussed as well as the suitability of these glasses as a host medium for rare-earth ion lasers and amplifiers.

Allison, Stephen W. (Knoxville, TN); Boatner, Lynn A. (Oak Ridge, TN); Sales, Brian C. (Knoxville, TN)

1998-01-01T23:59:59.000Z

251

Numerical simulations to study solar wind turbulence  

Science Conference Proceedings (OSTI)

Numerical simulation of coupled equations of kinetic Alfven wave (KAW) and ion acoustic wave is presented in the solar wind. The nonlinear dynamical equations satisfy the modified Zakharov system of equations by taking the nonadiabatic response of the background density. The ponderomotive nonlinearity is incorporated in the wave dynamics. The effect of Landau damping of KAW is taken into account. Localization of magnetic field intensity and the wavenumber spectra (perpendicular and parallel) of magnetic fluctuations are studied in solar plasmas around 1 a.u. Our results reveal the formation of damped localized structures and the steeper spectra that are in good agreement with the observations. These damped structures and steeper turbulent spectra can be responsible for plasma heating and particle acceleration in solar wind.

Sharma, R. P.; Sharma, Nidhi; Kumar, Sanjay [Centre for Energy Studies, Indian Institute of Technology Delhi, Delhi 110016 (India); Kumar, Sachin [Department of Applied Sciences and Humanities, Ajay Kumar Garg Engineering College, Ghaziabad 201009 (India); Singh, H. D. [Department of Physical Sciences, School of Physical and Chemical Sciences, Sikkim University, Sikkim 737102 (India)

2011-02-15T23:59:59.000Z

252

Numerical techniques of rigid body simulation  

E-Print Network (OSTI)

In recent years, the modeling of physical phenomena has become an integral part of computer applications in diverse areas from engineering to entertainment. This thesis focuses on a particular aspect of this modeling, the simulation of rigid bodies. Complicated simulations require the development of sophisticated collision detection systems and numerical techniques. Previous work in the field has almost exclusively been restricted to geometries that are convex or a union of convex pieces. One of the goals of this thesis is overcoming this restriction. Collision detection is only one of the many hurdles which arise in simulating collisions between rigid bodies. To calculate the appropriate response of colliding bodies, the point of contact between the bodies must be determined. Methods of contact point determination will also be discussed. This thesis also explores the issues of resolving simultaneous collisions and resting contact via the formulation of a linear complementarity problem (LCP). This method maintains the physical validity of the simulator, unlike penalty methods which are often used. Impulse based methods for resting contacts have been proposed and implemented by others, but cannot simulate simple structures, such as a stack of blocks. The LCP formulation allows these types of configurations, which are successfully simulated in this thesis. The culmination of this thesis is the development of a rigid body simulator. The numerical methods and algorithms employed are discussed and are compared to alternative techniques. The intention is that the reader use this thesis and its references to ease the process of writing a new simulator and gain insight into the methods used.

Eberle, David Michael

2001-01-01T23:59:59.000Z

253

H.R. 817: A Bill to authorize the Secretary of Energy to lease lands within the naval oil shale reserves to private entities for the development and production of oil and natural gas. Introduced in the House of Representatives, One Hundred Fourth Congress, First session  

Science Conference Proceedings (OSTI)

This bill would give the Secretary of Energy authority to lease lands within the Naval oil shale reserves to private entities for the purpose of surveying for and developing oil and gas resources from the land (other than oil shale). It also allows the Bureau of Land Management to be used as a leasing agent, establishes rules on royalties, and the sharing of royalties with the state, and covers the transfer of existing equipment.

NONE

1995-12-31T23:59:59.000Z

254

Numerical Simulation Methods Used at VNIIEF for Numerical Simulation Methods Used at VNIIEF for  

National Nuclear Security Administration (NNSA)

61 61 Numerical Simulation Methods Used at VNIIEF for Numerical Simulation Methods Used at VNIIEF for Multidimensional Radiation and Particle Transport Problems Multidimensional Radiation and Particle Transport Problems R.M. R.M. Shagaliev Shagaliev RFNC-VNIIEF, 607190, RFNC-VNIIEF, 607190, Sarov Sarov, , Nizhni Nizhni Novgorod region Novgorod region Joint Russian-American Five-Laboratory Conference on Computation Joint Russian-American Five-Laboratory Conference on Computation Mathematics|Physics Mathematics|Physics 19-23 June 2005, 19-23 June 2005, Crowne Crowne Plaza, Vienna, Austria Plaza, Vienna, Austria Russian Federal Nuclear Center - VNIIEF Institute of Theoretical Institute of Theoretical and Mathematical and Mathematical Physics Physics 2 of 61 Abstract

255

Length requirements for numerical-relativity waveforms  

E-Print Network (OSTI)

One way to produce complete inspiral-merger-ringdown gravitational waveforms from black-hole-binary systems is to connect post-Newtonian (PN) and numerical-relativity (NR) results to create "hybrid" waveforms. Hybrid waveforms are central to the construction of some phenomenological models for GW search templates, and for tests of GW search pipelines. The dominant error source in hybrid waveforms arises from the PN contribution, and can be reduced by increasing the number of NR GW cycles that are included in the hybrid. Hybrid waveforms are considered sufficiently accurate for GW detection if their mismatch error is below 3% (i.e., a fitting factor about 0.97). We address the question of the length requirements of NR waveforms such that the final hybrid waveforms meet this requirement, considering nonspinning binaries with q = M_2/M_1 \\in [1,4] and equal-mass binaries with \\chi = S_i/M_i^2 \\in [-0.5,0.5]. We conclude that for the cases we study simulations must contain between three (in the equal-mass nonspinning case) and ten (the \\chi = 0.5 case) orbits before merger, but there is also evidence that these are the regions of parameter space for which the least number of cycles will be needed.

Mark Hannam; Sascha Husa; Frank Ohme; P. Ajith

2010-08-17T23:59:59.000Z

256

Length requirements for numerical-relativity waveforms  

E-Print Network (OSTI)

One way to produce complete inspiral-merger-ringdown gravitational waveforms from black-hole-binary systems is to connect post-Newtonian (PN) and numerical-relativity (NR) results to create ``hybrid'' waveforms. Hybrid waveforms are central to the construction of some phenomenological models for GW search templates, and for tests of GW search pipelines. The dominant error source in hybrid waveforms arises from the PN contribution, and can be reduced by increasing the number of NR GW cycles that are included in the hybrid. Hybrid waveforms are considered sufficiently accurate for GW detection if their mismatch error is below 3% (i.e., a fitting factor about 0.97). We address the question of the length requirements of NR waveforms such that the final hybrid waveforms meet this requirement, considering nonspinning binaries with q = M_2/M_1 \\in [1,4] and equal-mass binaries with \\chi = S_i/M_i^2 \\in [-0.5,0.5]. We conclude that for the cases we study simulations must contain between three (in the equal-mass nonsp...

Hannam, Mark; Ohme, Frank; Ajith, P

2010-01-01T23:59:59.000Z

257

Numerical study of a ventilated facade panel  

Science Conference Proceedings (OSTI)

An energy-saving facade panel for non-residential buildings has been numerically investigated. Structured like a composite Trombe-Michel wall, the panel consists of a glazing, an absorber plate and insulation and contains a dead air space between glazing and absorber, as well as a convection channel between absorber and insulation. The influence of convection channel spacing on both recovery of solar energy during sunshine periods and on heat losses during night hours has been assessed. Two different options have been considered. First, the total panel thickness was maintained, which involves an increase of channel spacing having to be compensated by a corresponding decrease of the insulation thickness. Then, this constraint was removed so that an increase in channel spacing was allowed to entail an equivalent increase of the total panel thickness. The results indicate that large spacing favors energy recovery during sunshine periods for both options and reduces, although only slightly, heat losses during night hours for the second option. In the case of the first option, however, these losses tend to grow when channel spacing increases. 15 refs., 5 figs.

Mootz, F.; Bezian, J.J. [Centre d`Energetique de l`Ecole des Mines de Paris (France)

1996-07-01T23:59:59.000Z

258

Habitat reclamation plan to mitigate for the loss of habitat due to oil and gas production activities under maximum efficient rate, Naval Petroleum Reserve No. 1, Kern County, California  

Science Conference Proceedings (OSTI)

Activities associated with oil and gas development under the Maximum Efficiency Rate (MER) from 1975 to 2025 will disturb approximately 3,354 acres. Based on 1976 aerial photographs and using a dot grid methodology, the amount of land disturbed prior to MER is estimated to be 3,603 acres. Disturbances on Naval Petroleum Reserve No. 1 (NPR-1) were mapped using 1988 aerial photography and a geographical information system. A total of 6,079 acres were classified as disturbed as of June, 1988. The overall objective of this document is to provide specific information relating to the on-site habitat restoration program at NPRC. The specific objectives, which relate to the terms and conditions that must be met by DOE as a means of protecting the San Joaquin kit fox from incidental take are to: (1) determine the amount and location of disturbed lands on NPR-1 and the number of acres disturbed as a result of MER activities, (2) develop a long term (10 year) program to restore an equivalent on-site acres to that lost from prior project-related actions, and (3) examine alternative means to offset kit fox habitat loss.

Anderson, D.C.

1994-11-01T23:59:59.000Z

259

Numerical Modelling of Geothermal Systems a Short Introduction | Open  

Open Energy Info (EERE)

Numerical Modelling of Geothermal Systems a Short Introduction Numerical Modelling of Geothermal Systems a Short Introduction Jump to: navigation, search OpenEI Reference LibraryAdd to library General: Numerical Modelling of Geothermal Systems a Short Introduction Authors Mauro Cacace, Björn Onno Kaiser and Yvonne Cherubini Published Helmholtz Association, The date "N/A" was not understood.The date "N/A" was not understood. DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Numerical Modelling of Geothermal Systems a Short Introduction Citation Mauro Cacace,Björn Onno Kaiser,Yvonne Cherubini. N/A. Numerical Modelling of Geothermal Systems a Short Introduction. N/A. Helmholtz Association. N/Ap. Retrieved from "http://en.openei.org/w/index.php?title=Numerical_Modelling_of_Geothermal_Systems_a_Short_Introduction&oldid=688986"

260

Tropical anvil cirrus evolution from observations and numerical...  

NLE Websites -- All DOE Office Websites (Extended Search)

cirrus evolution from observations and numerical simulations Deng, Min University of Utah Mace, Gerald University of Utah Category: Modeling The tropical anvil cirrus formation...

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While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

An Integrated Experimental and Numerical Study: Developing a...  

Open Energy Info (EERE)

and natural geothermal systems. The simulator can also be used to evaluate long-term CO2 sequestration potentials. State Minnesota Objectives Modify a numerical simulator (TOUGH2)...

262

2.29 Numerical Fluid Mechanics, Spring 2007  

E-Print Network (OSTI)

This course introduces students to MATLAB. Numerical methods include number representation and errors, interpolation, differentiation, integration, systems of linear equations, and Fourier interpolation and transforms. ...

Schmidt, Henrik

263

Experimental and Numerical Examination of the Thermal Transmittance...  

NLE Websites -- All DOE Office Websites (Extended Search)

Experimental and Numerical Examination of the Thermal Transmittance of High Performance Window Frames Author: Gustavsen Ph.D., Arild Publication Date: 09-09-2010 Publication Info:...

264

Establishing Operational Parameters of AL-EMS Using Numerical ...  

Science Conference Proceedings (OSTI)

Effects of Cooling Rate on Microstructure in En-Ac43000 Gravity Castings and ... of AL-EMS Using Numerical Simulations to Promote Energy Efficiency during...

265

Numerical Simulation of Inertia Welding of Inconel 718 (Abstract)  

Science Conference Proceedings (OSTI)

Edison Joining Technology Centre, 1250 Arthur E. Adams Drive,. Columbus, OH 43221. Abstract. This paper presents the results of numerical simulations and...

266

A Numerical Model for Combustion of Bubbling Thermoplastic ...  

Science Conference Proceedings (OSTI)

... the highly viscous nature of softening coal, the model ... unity in the region close to the ... dependent numerical model of burning thermoplastic materials ...

2004-12-27T23:59:59.000Z

267

Numerical Simulation and Experimental Analysis of Notched Failure ...  

Science Conference Proceedings (OSTI)

Recent advances in numerical methods, such as extended and augmented finite element modelling (X-FEM and A-FEM respectively) provide significant...

268

Experimental and Numerical Investigations on Laser welding of ...  

Science Conference Proceedings (OSTI)

Through the numerical simulation, the weld penetration, the geometry of the ... A high-speed CCD camera is used to real-time monitor the laser welding process.

269

Numerical Methods for Optimal Stochastic Control in Finance.  

E-Print Network (OSTI)

??In this thesis, we develop partial differential equation (PDE) based numerical methods to solve certain optimal stochastic control problems in finance. The value of a (more)

Chen, Zhuliang

2008-01-01T23:59:59.000Z

270

On the Numerical Simulation of Waterflooding of Heterogeneous Petroleum Reservoirs  

E-Print Network (OSTI)

We present a new, naturally parallelizable, accurate numerical method for the solution of transport-dominated diffusion processes in heterogeneous porous media.

Jim Douglas, Jr.; Frederico Furtado; Felipe Pereira

1997-01-01T23:59:59.000Z

271

Numerical Simulation of the Irish Wind Climate and Comparison...  

Open Energy Info (EERE)

Numerical Simulation of the Irish Wind Climate and Comparison with Wind Atlas Data

(Abstract):The wind climate of Ireland has been calculated using the...

272

Numerical Simulations of Wire and Foil Behaviors under Megaampere...  

National Nuclear Security Administration (NNSA)

2: High Energy Density, Plasmas, Magnetic Fields Numerical Simulations of Wire and Foil Electrical Explosion under Helical EMG Current Drive for Warm Dense Matter Generation S.F....

273

Numerical Data Advisory Board assembly of mathematial and physical sciences  

SciTech Connect

The Numerical Data Advisory Board (NDAB) is an advisory body that provides expert overview, on a broad basis, of data needs and data programs as required for the advancement of science and technology. Board members, representing various disciplines, concern themselves with the quality, reliability, availability, accessibility, and dissemination of numerical data in physical, chemical, engineering, and interdisciplinary subjects as well as numeric and non-numeric data that arise in biology and geology. Topics of concern are addressed by the NDAB membership, or by specific, carefully chosen committees and panels established by NDAB in order to include experts appropriate to the subject at hand.

Not Available

1980-07-30T23:59:59.000Z

274

A Multimaterial Numerical Method for Eulerian Shock Physics  

National Nuclear Security Administration (NNSA)

Schmitt, R.G. 1 A Multimaterial Numerical Method for Eulerian Shock Physics R.G. Schmitt Sandia National Laboratories, Albuquerque, New Mexico, 87185 The hydrodynamic techniques...

275

A Numerical Evaluation Of Electromagnetic Methods In Geothermal...  

Open Energy Info (EERE)

GEOTHERMAL ENERGYGeothermal Home Journal Article: A Numerical Evaluation Of Electromagnetic Methods In Geothermal Exploration Details Activities (0) Areas (0) Regions (0) Abstract:...

276

A Hydro-Thermo-Mechanical Numerical Model For Hdr Geothermal...  

Open Energy Info (EERE)

Hydro-Thermo-Mechanical Numerical Model For Hdr Geothermal Reservoir Evaluation Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A...

277

Evaluation of numerical weather prediction for intra-day solar forecasting in the continental United States  

E-Print Network (OSTI)

MOS),NumericalWeatherPrediction(NWP),SolarForecastingofnumericalweatherpredictionforintra?daysolarsolarenergyapplicationsbasedonaerosolchemicaltransportand numericalweather

Mathiesen, Patrick; Kleissl, Jan

2011-01-01T23:59:59.000Z

278

A high-resolution, cloud-assimilating numerical weather prediction model for solar irradiance forecasting  

E-Print Network (OSTI)

ofnumericalweatherpredictionsolarirradianceforecastsofnumericalweatherpredictionforintra?daysolarnumericalweatherpredictionmodelforsolarirradiance

Mathiesen, Patrick; Collier, Craig; Kleissl, Jan

2013-01-01T23:59:59.000Z

279

NUMERICAL STUDIES OF ~MPURITIES IN FUSION PLASMAS*  

NLE Websites -- All DOE Office Websites (Extended Search)

19 17 19 17 DE82 022279 NUMERICAL STUDIES OF ~MPURITIES IN FUSION PLASMAS* __ ~ -_ R. A. Hulse Plasma P h y s i c s L a b o r a t o r y , P r i n c e t o n U n i v e r s i t y P r i n c e t o n , New Jersey 08544 ABSTRACT me coupled p a r t i a l d i f f e r e n t i a l e q u a t i o n s used t o d e s c r i b e t h e b e h a v i o r of i m p u r i t y i o n s i n m a g n e t i c a l l y c o n f i n e d c o n t r o l l e d f u s i o n plasmas r e q u i r e n u m e r i c a l s o l u t i o n f o r cases of p r a c t i c a l i n t e r e s t . Computer codes developed f o r i m p u r i t y modeling a t t h e P r i n c e t o n Plasma P h y s i c s L a b o r a t o r y are used as examples of t h e t y p e s of codes employed f o r t h i s purpose. These codes s o l v e f o r t h e i m p u r i t y i o n i z a t i o n s t a t e d e n s i t i e s and a s s o c i a t e d r a d i a t i o n r a t e s u s i n g a t o m i c p h y s i c s a p p r o p r i a t e f o r t h e s e low-density, high-temperature plasmas. The s i m p l e r codes s o l v e l o c a l e q u a t i o n s i n z

280

Numerical simulation of thermal response of the skin tissues  

Science Conference Proceedings (OSTI)

The aim of this paper is to develop a numerical model for the simulation the heat transfer process and the heat-induced mechanical response of the skin tissues. We present some models using the finite element method in 2D space. A multilayer model is ... Keywords: biothermomechanics, coupled problems, finite element method, numerical methods, skin tissue, thermal systems

Iulia Maria Crstea; Ion Crstea

2009-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "numerous naval propulsor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Robust Numerical Integration Using Wave-Digital Concepts  

Science Conference Proceedings (OSTI)

Numerical integration of linear and nonlinear ordinary and partial differential equations describing physically realistic systems can be achieved by means of principles derived from those originally developed in the context of wave digital filters, thus ... Keywords: Robust numerical integration, linear and nonlinear ordinary and partial differential equations, multidimensional causal and passive systems, wave-digital approach

Alfred Fettweis

2006-01-01T23:59:59.000Z

282

Error estimates for the numerical approximation of Neumann control problems  

Science Conference Proceedings (OSTI)

We continue the discussion of error estimates for the numerical analysis of Neumann boundary control problems we started in Casas et al. (Comput. Optim. Appl. 31:193-219, 2005). In that paper piecewise constant functions were used to approximate the ... Keywords: boundary control, error estimates, numerical approximation, semilinear elliptic equation

Eduardo Casas; Mariano Mateos

2008-04-01T23:59:59.000Z

283

Numerical simulations of oblique penetration into reinforced concrete targets  

Science Conference Proceedings (OSTI)

A dynamic constitutive model based on the tensile and the compressive damage models for concrete was developed and implemented into the three-dimensional finite element code, LS-DYNA. Numerical simulations of oblique penetration into reinforced concrete ... Keywords: Dynamic damage model, Numerical simulation, Oblique penetration, Reinforced concrete

Yan Liu; Fenglei Huang; Aie Ma

2011-04-01T23:59:59.000Z

284

High-performance numerical optimization on multicore clusters  

Science Conference Proceedings (OSTI)

This paper presents a software infrastructure for high performance numerical optimization on clusters of multicore systems. At the core, a runtime system implements a programming and execution environment for irregular and adaptive task-based parallelism. ... Keywords: global optimization, message passing, numerical differentiation, task parallelism

Panagiotis E. Hadjidoukas; Constantinos Voglis; Vassilios V. Dimakopoulos; Isaac E. Lagaris; Dimitris G. Papageorgiou

2011-08-01T23:59:59.000Z

285

Numerical Modeling At Coso Geothermal Area (1995) | Open Energy Information  

Open Energy Info (EERE)

Numerical Modeling At Coso Geothermal Area (1995) Numerical Modeling At Coso Geothermal Area (1995) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Numerical Modeling At Coso Geothermal Area (1995) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Numerical Modeling Activity Date 1995 Usefulness useful DOE-funding Unknown Exploration Basis Locate an active fault zone by analyzing seismic guided waves from microearthquake data Notes An active fault zone was located in the Coso geothermal field, California, by identifying and analyzing a fault-zone trapped Rayleigh-type guided wave from microearthquake data. The wavelet transform is employed to characterize guided-wave's velocity-frequency dispersion, and numerical methods are used to simulate the guided-wave propagation. The modeling

286

A Multimaterial Numerical Method for Eulerian Shock Physics  

National Nuclear Security Administration (NNSA)

Multimaterial Numerical Method for Multimaterial Numerical Method for Eulerian Shock Physics Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. Five-Laboratory Conference on Computational Mathematics, Vienna, Austria, 19-23 June 2005 R. G. Schmitt Sandia National Laboratories Albuquerque, New Mexico, USA *Introduction *Motivation *Governing equations *Numerical method *Examples *Summary Outline Shock passage through heterogeneous media Large number of mixed cells Introduction * Multimaterial Eulerian shock physics is an important class of problems * Hydrocode implementations make various approximations to governing equations * Focus: examine the assumptions made regarding

287

Simple intrinsic defects in GaAs : numerical supplement.  

SciTech Connect

This Report presents numerical tables summarizing properties of intrinsic defects in gallium arsenide, GaAs, as computed by density functional theory. This Report serves as a numerical supplement to the results published in: P.A. Schultz and O.A. von Lilienfeld, 'Simple intrinsic defects in GaAs', Modelling Simul. Mater. Sci Eng., Vol. 17, 084007 (2009), and intended for use as reference tables for a defect physics package in device models. The numerical results for density functional theory calculations of properties of simple intrinsic defects in gallium arsenide are presented.

Schultz, Peter Andrew

2012-04-01T23:59:59.000Z

288

Grid-independent Issue in Numerical Heat Transfer  

E-Print Network (OSTI)

Grid independent is associated with the accuracy or even rationality of numerical results. This paper takes two-dimensional steady heat transfer for example to reveal the effect of grid resolution on numerical results. The law of grid dependence is obtained and a simple mathematical formula is presented. The production acquired here can be used as the guidance in choosing grid density in numerical simulation and get exact grid independent value without using infinite fine grid. Through analyzing grid independent, we can find the minimum number of grid cells that is needed to get grid-independent results. Such strategy can save computational resource while ensure a rational computational result.

Yao Wei; Wang Jian; Liao Guangxuan

2006-09-25T23:59:59.000Z

289

Numerical Modeling Of Basin And Range Geothermal Systems | Open Energy  

Open Energy Info (EERE)

Numerical Modeling Of Basin And Range Geothermal Systems Numerical Modeling Of Basin And Range Geothermal Systems Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Numerical Modeling Of Basin And Range Geothermal Systems Details Activities (3) Areas (3) Regions (0) Abstract: Basic qualitative relationships for extensional geothermal systems that include structure, heat input, and permeability distribution have been established using numerical models. Extensional geothermal systems, as described in this paper, rely on deep circulation of groundwater rather than on cooling igneous bodies for heat, and rely on extensional fracture systems to provide permeable upflow paths. A series of steady-state, two-dimensional simulation models is used to evaluate the effect of permeability and structural variations on an idealized, generic

290

Numerical Modeling At Raft River Geothermal Area (1983) | Open Energy  

Open Energy Info (EERE)

Raft River Geothermal Area (1983) Raft River Geothermal Area (1983) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Numerical Modeling At Raft River Geothermal Area (1983) Exploration Activity Details Location Raft River Geothermal Area Exploration Technique Numerical Modeling Activity Date 1983 Usefulness not indicated DOE-funding Unknown Notes The numerical modeling of the resistivity data is marginal for changes as small as those observed but the results suggest that changes of a few percent could be expected from a fracture zone extending from depth to within 100 m of the surface. References Sill, W. R. (1 September 1983) Resistivity measurements before and after injection Test 5 at Raft River KGRA, Idaho. Final report Retrieved from "http://en.openei.org/w/index.php?title=Numerical_Modeling_At_Raft_River_Geothermal_Area_(1983)&oldid=47387

291

Numerical Studies of Tritium and Helium-3 in the Thermocline  

Science Conference Proceedings (OSTI)

The effects of circulation and lateral mixing on the distributions of tritium and heliurn-3 in the thermocline are investigated using a two-dimensional numerical model. The gyre circulation was approximated by a steady flow with closed ...

David L. Musgrave

1990-03-01T23:59:59.000Z

292

Diabatically Driven Discrete Propagation of Surface Fronts: A Numerical Analysis  

Science Conference Proceedings (OSTI)

Discrete frontal propagation has been identified as a process whereby a surface front discontinuously moves forward, without evidence of frontal passage across a mesoscale region. Numerical simulations are employed to examine the upper-level ...

George H. Bryan; J. Michael Fritsch

2000-07-01T23:59:59.000Z

293

A Numerical Study of Cirrus Clouds. Part I: Model Description  

Science Conference Proceedings (OSTI)

This article, the first of a two-part series, presents a detailed description of a two-dimensional numerical cloud model directed toward elucidating the physical processes governing the evolution of cirrus clouds. The two primary scientific ...

Hui-Chun Liu; Pao K. Wang; Robert E. Schlesinger

2003-04-01T23:59:59.000Z

294

A Benchmark Simulation for Moist Nonhydrostatic Numerical Models  

Science Conference Proceedings (OSTI)

A benchmark solution that facilitates testing the accuracy, efficiency, and efficacy of moist nonhydrostatic numerical model formulations and assumptions is presented. The solution is created from a special configuration of moist model processes ...

George H. Bryan; J. Michael Fritsch

2002-12-01T23:59:59.000Z

295

Numerical Experiments in Mesoscale Prediction over Southeast Australia  

Science Conference Proceedings (OSTI)

A new movable fine-mesh model (MFM) developed at the Australian Numerical Meteorology Research Centre, for mesoscale data assimilation and forecasting, is described. For the present, it is a 10-layer, hydrostatic, primitive equations model with ...

D. J. Gauntlett; L. M. Leslie; L. W. Logan

1984-06-01T23:59:59.000Z

296

Wintertime Supercell Thunderstorms in a Subtropical Environment: Numerical Simulation  

Science Conference Proceedings (OSTI)

Following an earlier diagnostic study, the present paper performs numerical simulations of the rare wintertime supercell storms during 1920 December 2002 in a subtropical environment near Taiwan. Using Japan Meteorology Agency (JMA) 20-km ...

Chung-Chieh Wang; George Tai-Jen Chen; Shan-Chien Yang; Kazuhisa Tsuboki

2009-07-01T23:59:59.000Z

297

The Influence of Helicity on Numerically Simulated Convective Storms  

Science Conference Proceedings (OSTI)

A three-dimensional numerical cloud model is used to investigate the influence of storm-relative environmental helicity (SREH) on convective storm structure and evolution, with a particular emphasis on the identification of ambient shear profiles ...

Kelvin K. Droegemeier; Steven M. Lazarus; Robert Davies-Jones

1993-07-01T23:59:59.000Z

298

A Numerical Study of a Southeast Australian Coastal Ridging Event  

Science Conference Proceedings (OSTI)

A numerical study of the 911 November 1982 southeast Australian coastal ridging event is presented. The mesoscale coastal features of this event have been previously described as a coastally trapped disturbance (CTD). However, the analysis ...

K. J. Tory; C. J. C. Reason; P. L. Jackson

2001-03-01T23:59:59.000Z

299

A Numerical Model for Low-Frequency Equatorial Dynamics  

Science Conference Proceedings (OSTI)

A fast, efficient numerical procedure for modeling the linear low-frequency motions on an equatorial beta plane is developed. The model is capable of simulating the seasonal and interannual variability in realistically shaped ocean basins forced ...

Mark A. Cane; Randall J. Patton

1984-12-01T23:59:59.000Z

300

Energy Trapping near the Equator in a Numerical Ocean Model  

Science Conference Proceedings (OSTI)

The trapped equatorial standing modes described theoretically by Gent (1979) are reproduced in a single vertical-mode numerical ocean model. integrations are carried out in domains whose longitudinal extents are characteristic of the widths of ...

Peter R. Gent; Albert J. Semtner Jr.

1980-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "numerous naval propulsor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

An Open Boundary Condition for Numerical Coastal Circulation Models  

Science Conference Proceedings (OSTI)

Open boundaries (OBs) are usually unavoidable in numerical coastal circulation simulations. At OBs, an appropriate open boundary condition (OBC) is required so that outgoing waves freely pass to the exterior without creating reflections back into ...

Peifeng Ma; Ole Secher Madsen

2011-12-01T23:59:59.000Z

302

A Review of Numerical Forecast Guidance for Hurricane Hugo  

Science Conference Proceedings (OSTI)

Numerical forecast guidance for Hurricane Hugo from the National Meteorological Center is examined, as well as forecasts from the European Center for Medium Range Forecasting and the United Kingdom Meteorological Office. No one forecast product ...

John H. Ward

1990-09-01T23:59:59.000Z

303

The Fleet Numerical Oceanography Center Global Spectral Ocean Wave Model  

Science Conference Proceedings (OSTI)

The Spectral Ocean Wave Model (SOWM) has been an operational product at Fleet Numerical Oceanography Center since the mid 1970s; the Global Spectral Ocean Wave Model (GSOWM) was developed to replace it. An operational test of GSOWM, using buoy, ...

R. M. Clancy; J. E. Kaitala; L. F. Zambresky

1986-05-01T23:59:59.000Z

304

Global Numerical Weather Prediction at the National Meteorological Center  

Science Conference Proceedings (OSTI)

In this paper we describe the global numerical weather prediction system of the National Meteorological Center, and review recent improvements, the evolution in skill, and current research projects and plans.

E. Kalnay; M. Kanamitsu; W. E. Baker

1990-10-01T23:59:59.000Z

305

Fully Lagrangian Numerical Solutions of Unbalanced Frontogenesis and Frontal COllapse  

Science Conference Proceedings (OSTI)

Numerical simulation has failed to answer some fundamental questions about atmospheric frontogenesis because of the artificial minimum resolved scale in grid point and spectral models alike. To alleviate this handicap and shed light on some ...

Stephen T. Garner

1989-03-01T23:59:59.000Z

306

Hurricane Track Prediction Using a Statistical Ensemble of Numerical Models  

Science Conference Proceedings (OSTI)

A new statistical ensemble prediction system for tropical cyclone tracks is presented. The system is based on a statistical analysis of the annual performance of numerical track prediction models, assuming that their position errors are ...

Harry C. Weber

2003-05-01T23:59:59.000Z

307

Numerical Modeling Studies of a Process of Lee Cyclogenesis  

Science Conference Proceedings (OSTI)

A process of lee cyclogenesis associated with backsheared baroclinic flow is studied using a fully nonlinear, primitive equation numerical model. A region of low pressure and a narrow baroclinic zone develop to the southwest of the mountain in ...

Yuh-Lang Lin; Donald J. Perkey

1989-12-01T23:59:59.000Z

308

Kalman Filter and Analog Schemes to Postprocess Numerical Weather Predictions  

Science Conference Proceedings (OSTI)

Two new postprocessing methods are proposed to reduce numerical weather predictions systematic and random errors. The first method consists of running a postprocessing algorithm inspired by the Kalman filter (KF) through an ordered set of analog ...

Luca Delle Monache; Thomas Nipen; Yubao Liu; Gregory Roux; Roland Stull

2011-11-01T23:59:59.000Z

309

Numerical simulation of tower rotor interaction for downwind wind turbine  

Science Conference Proceedings (OSTI)

Downwind wind turbines have lower upwind rotormisalignment, and thus lower turning moment and self-steered advantage over the upwind configuration. In this paper, numerical simulation to the downwind turbine is conducted to investigate the interaction ...

Isam Janajreh; Ilham Talab; Jill Macpherson

2010-01-01T23:59:59.000Z

310

Dynamical Subgrid-Scale Parameterizations from Direct Numerical Simulations  

Science Conference Proceedings (OSTI)

Dynamical subgrid-scale parameterizations of stochastic backscatter, eddy drain viscosity, and net eddy viscosity have been formulated and calculated for two-dimensional turbulent flows on the sphere based on the statistics of direct numerical ...

Jorgen S. Frederiksen; Steven M. Kepert

2006-11-01T23:59:59.000Z

311

A Numerical Investigation of Mixed-Layer Dynamics  

Science Conference Proceedings (OSTI)

The structure of the stratified turbulent upper mixed layer of the ocean has been numerically investigated by using the turbulence closure model of Gibson and Launder, under the action of an impulsive wind stress ?0 and zero surface heat flux. ...

Pijush K. Kundu

1980-02-01T23:59:59.000Z

312

Numerical and experimental studies of thermosiphon passive heating systems  

DOE Green Energy (OSTI)

A numerical analysis was used to predict the performance of a thermosiphon passive solar heating system. The numerical method is an adaptation of the PASOLE code including a calculation procedure for flow in the thermosiphon channel. A Los Alamos National Laboratory test cell was used to obtain experimental data for several configurations. Comparisons of experimentally measured collector surface temperatures and auxiliary heating energy requirements, with values predicted by numerical simulations, showed good agreement for the system without a backdraft damper. Experiments were also run using a backdraft damper consisting of a Tedlar flap and wire mesh covering the upper vent. Comparisons of experimental data with the results of a numerical simulation indicated that this relatively crude damper was approximately 35% effective.

Schnurr, N.M.; Wray, W.O.

1984-01-01T23:59:59.000Z

313

Improvements of Upstream, Semi-Lagrangian Numerical Advection Schemes  

Science Conference Proceedings (OSTI)

Semi-Lagrangian methods are common numerical techniques for the computation of the advection term in a nondivergent flow. They combine high accuracy and moderate computational requirements. Three aspects of these methods will be discussed. First, ...

P. Seibert; B. Morariu

1991-01-01T23:59:59.000Z

314

Numerical Simulations of Shelterbelt Effects on Wind Direction  

Science Conference Proceedings (OSTI)

A neutral boundary layer nonhydrostatic numerical model is used to determine the characteristics of shelterbelt effects on mean wind direction and to study the processing causing wind rotation when air passes through a shelterbelt. The model uses ...

Hao Wang; Eugene S. Takle

1995-10-01T23:59:59.000Z

315

Numerical Simulation of a Midlatitude Squall Line in Two Dimensions  

Science Conference Proceedings (OSTI)

A two-dimensional, anelastic cloud model was used in attempts to numerically replicate the observed structure of a midlatitude squall line. Initial conditions were adapted from observations of the 22 May 1976 Oklahoma line. Model simulations were ...

Robert G. Fovell; Yoshi Ogura

1988-12-01T23:59:59.000Z

316

Numerical Modeling of the Atmosphere with an Isentropic Vertical Coordinate  

Science Conference Proceedings (OSTI)

In constructing a numerical model of the atmosphere, we must choose an appropriate vertical coordinate. Among the various possibilities, isentropic vertical coordinates such as the ?-coordinate seem to have the greatest potential, in spite of the ...

Yueh-Jiuan G. Hsu; Akio Arakawa

1990-10-01T23:59:59.000Z

317

Numerical Simulation of AirSea Coupling during Coastal Upwelling  

Science Conference Proceedings (OSTI)

Airsea coupling during coastal upwelling was examined through idealized three-dimensional numerical simulations with a coupled atmosphereocean mesoscale model. Geometry, topography, and initial and boundary conditions were chosen to be ...

Natalie Perlin; Eric D. Skyllingstad; Roger M. Samelson; Philip L. Barbour

2007-08-01T23:59:59.000Z

318

A Numerical Study of Loop Current Intrusions and Eddy Shedding  

Science Conference Proceedings (OSTI)

The dynamics of the eddy shedding by the Loop Current in the Gulf of Mexico have been investigated using three nonlinear numerical models: two-layer, barotropic and reduced gravity. The barotropic and reduced gravity models demonstrate the ...

H. E. Hurlburt; J. Dana Thompson

1980-10-01T23:59:59.000Z

319

Numerical Simulation and Optimal Control of Air Separation Plants  

E-Print Network (OSTI)

Numerical simulation has already become an indispensable tool in the chemical engineering industry. In this paper, the extension of an already existing simulation package to the efficient and reliable solution of optimal control problems for optimal plant operation is discussed.

Gabriele Engl; Andreas Krner; Thomas Kronseder; Oskar von Stryk

1999-01-01T23:59:59.000Z

320

The Interaction of Numerically Simulated Supercells Initiated along Lines  

Science Conference Proceedings (OSTI)

Supercells in the southern plains are often localized, forming as cells along a convective line, even though the environment may support supercell formation over a much broader, mesoscale region. A set of numerical experiments is devised in which ...

Howard B. Bluestein; Morris L. Weisman

2000-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "numerous naval propulsor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Incompressible and Anelastic Flow Simulations on Numerically Generated Grids  

Science Conference Proceedings (OSTI)

In the numerical simulation of incompressible and anelastic flows, it is necessary to solve an elliptic equation at each time step. When the boundaries of such flows are nonrectangular, it may be advantageous to solve the equations on a new, ...

R. D. Sharman; T. L. Keller; M. G. Wurtele

1988-05-01T23:59:59.000Z

322

Pacific Hindcast Performance of Three Numerical Wave Models  

Science Conference Proceedings (OSTI)

Although mean or integral properties of wave spectra are typically used to evaluate numerical wave model performance, one must look into the spectral details to identify sources of model deficiencies. This creates a significant problem, as basin-...

Jeffrey L. Hanson; Barbara A. Tracy; Hendrik L. Tolman; R. Douglas Scott

2009-08-01T23:59:59.000Z

323

Free Planetary Waves in Finite-Difference Numerical Models  

Science Conference Proceedings (OSTI)

The effects of spatial finite-differencing, viscosity and diffusion on unbounded planetary waves in numerical models are investigated using a quasi-geostrophic approximation to the midlatitude, ?-plane, shallow-water equations. The two-...

Roxana C. Wajsowicz

1986-04-01T23:59:59.000Z

324

Two-Time-Step Oscillations in Numerical Weather Prediction Models  

Science Conference Proceedings (OSTI)

Spurious, nonamplifying, two-time-step oscillations are present in several numerical models of the atmosphere where the vertical diffusion is parameterized using a nonlinear diffusion equation. The problems become particularly pronounced when the ...

Ulla Hammarstrand

1997-12-01T23:59:59.000Z

325

Numerical Modeling of Gravity Wave Generation by Deep Tropical Convection  

Science Conference Proceedings (OSTI)

Although convective clouds are known to generate internal gravity waves, the mechanisms responsible are not well understood. The present study seeks to clarify the dynamics of wave generation using a high-resolution numerical model of deep ...

Todd P. Lane; Michael J. Reeder; Terry L. Clark

2001-05-01T23:59:59.000Z

326

A Numerical Study of Two-Dimensional Moist Baroclinic Instability  

Science Conference Proceedings (OSTI)

A study of baroclinic instability in the presence of moisture is performed with a primitive equation nonhydrostatic two-dimensional numerical model. A new assumption regarding the meridional structure of the perturbation mixing ratio is discussed ...

Maurizio Fantini

1993-05-01T23:59:59.000Z

327

Numerical Consistency of Metric Terms in Terrain-Following Coordinates  

Science Conference Proceedings (OSTI)

In numerically integrating the equations of motion in terrain-following coordinates, care must be taken in treating the metric terms that arise due to the sloping coordinate surfaces. In particular, metric terms that appear in the advection and ...

Joseph B. Klemp; William C. Skamarock; Oliver Fuhrer

2003-07-01T23:59:59.000Z

328

Numerical Simulation of Internal Kelvin Waves and Coastal Upwelling Fronts  

Science Conference Proceedings (OSTI)

Two three-dimensional primitive equation numerical ocean models are applied to the problem of internal Kelvin waves and coastal upwelling in the Great Lakes. One is the Princeton Ocean Model (POM) with a terrain-following (sigma) vertical ...

Dmitry Beletsky; William P. OConnor; David J. Schwab; David E. Dietrich

1997-07-01T23:59:59.000Z

329

Numerical Simulation and Modelling of Electronic and Biochemical Systems  

Science Conference Proceedings (OSTI)

Numerical simulation and modelling are witnessing a resurgence. Designing systems with integrated wireless components, mixed-signal blocks and nanoscale, multi-GHz "digital" circuits is requiring extensive low-level modelling and simulation. Analysis ...

Jaijeet Roychowdhury

2009-02-01T23:59:59.000Z

330

An Eddy Resolving Numerical Model of the Ventilated Thermocline  

Science Conference Proceedings (OSTI)

A three-dimensional, primitive equation numerical model is used to study the effects of mesoscale eddies within the subtropical thermocline. Solutions are obtained for an ocean bounded by idealized topography are driven by simple wind and ...

Michael D. Cox

1985-10-01T23:59:59.000Z

331

50th Anniversary of Operational Numerical Weather Prediction  

Science Conference Proceedings (OSTI)

The National Centers for Environmental Prediction (NCEP), Air Force Weather Agency (AFWA), Fleet Numerical Meteorology and Oceanography Center (FNMOC), National Weather Association, and American Meteorological Society (AMS) cosponsored a ...

Kristine Harper; Louis W. Uccellini; Lauren Morone; Eugenia Kalnay; Kenneth Carey

2007-05-01T23:59:59.000Z

332

Linear Spectral Numerical Model for Internal Gravity Wave Propagation  

Science Conference Proceedings (OSTI)

A three-dimensional linear spectral numerical model is proposed to simulate the propagation of internal gravity wave fluctuations in a stably stratified atmosphere. The model is developed to get first-order estimations of gravity wave ...

J. Marty; F. Dalaudier

2010-05-01T23:59:59.000Z

333

A Few Graph-Based Relational Numerical Abstract Domains  

Science Conference Proceedings (OSTI)

This article presents the systematic design of a class of relational numerical abstract domains from non-relational ones. Constructed domains represent sets of invariants of the form (vj - vi C), where vj ...

Antoine Min

2002-09-01T23:59:59.000Z

334

Numerical Simulations of the Formation of Hurricane Gabrielle (2001)  

Science Conference Proceedings (OSTI)

This study examines the formation of Hurricane Gabrielle (2001), focusing on whether an initial disturbance and vertical wind shear were favorable for development. This examination is performed by running numerical experiments using the fifth-...

K. D. Musgrave; C. A. Davis; M. T. Montgomery

2008-08-01T23:59:59.000Z

335

A Numerical Method for Synthesizing Atmospheric Temperature and Humidity Profiles  

Science Conference Proceedings (OSTI)

A numerical technique is described for synthesizing realistic atmospheric temperature and humidity profiles. The method uses an ensemble of radiosonde measurements collected at a site of interest. Erroneous profiles are removed by comparing their ...

Maia S. Tatarskaia; Richard J. Lataitis; B. Boba Stankov; Viatcheslav V. Tatarskii

1998-07-01T23:59:59.000Z

336

Numerical Simulation of CloudClear Air Interfacial Mixing  

Science Conference Proceedings (OSTI)

This paper discusses results from a series of direct numerical simulations of the microscale cloudclear air mixing, set forth in the idealized scenario of decaying moist turbulence. In the moist case, kinetic energy of microscale motions comes ...

Miros?aw Andrejczuk; Wojciech W. Grabowski; Szymon P. Malinowski; Piotr K. Smolarkiewicz

2004-07-01T23:59:59.000Z

337

Geothermal: Sponsored by OSTI -- A numerical model ofhydro-thermo...  

NLE Websites -- All DOE Office Websites (Extended Search)

A numerical model of hydro-thermo-mechanical coupling in a fractured rock mass Geothermal Technologies Legacy Collection HelpFAQ | Site Map | Contact Us | Admin Log On HomeBasic...

338

History of Numerical Weather Prediction at the National Meteorological Center  

Science Conference Proceedings (OSTI)

The first modern numerical weather prediction (NWP) models were developed for the computer that was announced in 1932 at the Institute for Advanced Study, in Princeton, New Jersey. Within 3 yr three agencies of the United States Government ...

Frederick G. Shuman

1989-09-01T23:59:59.000Z

339

A Numerical Sensitivity Study of Aerosol Influence on Immersion Freezing  

NLE Websites -- All DOE Office Websites (Extended Search)

Numerical Sensitivity Study of Aerosol Influence on Immersion Freezing Numerical Sensitivity Study of Aerosol Influence on Immersion Freezing in Mixed-Phase Stratiform Clouds Gijs de Boer, Tempei Hashino, Edwin W. Eloranta and Gregory J. Tripoli The University of Wisconsin - Madison (1) Introduction (1) Introduction Mixed-phase stratiform clouds are commonly observed at high latitudes (Shupe et al., 2006; de Boer et al., 2009a). These clouds significaly impact the atmospheric radiative

340

Numerical prediction of interfacial instabilities: Sharp interface method (SIM)  

Science Conference Proceedings (OSTI)

We introduce a sharp interface method (SIM) for the direct numerical simulation of unstable fluid-fluid interfaces. The method is based on the level set approach and the structured adaptive mesh refinement technology, endowed with a corridor of irregular, ... Keywords: Gas-liquid interfaces, Instability-seeding in numerical simulations, Interfacial flows, Interfacial instability, Rayleigh-Taylor instability, Sharp-interface treatment, Viscous Kelvin-Helmholtz instability, Yih instability

R. R. Nourgaliev; M. -S. Liou; T. G. Theofanous

2008-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "numerous naval propulsor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Numerical simulation of micro-fluidic passive and active mixers  

E-Print Network (OSTI)

Numerical simulations of mixing using passive and active techniques are performed. For passive mixing, numerical modeling of a micro-fluidic device, build by Holden and Cremer, was performed. The micro-fluidic device consists of a Y-junction that allows inflow of two different species of fluid into a main-channel. The main-channel eventually splits into eleven smaller output micro-channels. This device enables control of molecular diffusion from one fluid stream into the other by regulating the flow rate. Hence, output channels exhibit predetermined concentration values, which allow concentration dependent chemistry experiments in each output channel. Convective diffusive transport in this micro mixer is studied numerically and theoretically. Our model prediction are compared with the experimental data. Numerical simulations of a peristaltically driven micro mixer is studied as a function of the travelling wave amplitude and the Reynolds number. First the numerical scheme was verified for small deformation cases for moderate and large Reynolds numbers. Kinematics of large deformation conditions are studied for various Reynolds numbers.

Kumar, Saurabh

2002-01-01T23:59:59.000Z

342

Naval Postgraduate School Annual Report 2011  

E-Print Network (OSTI)

detectable, chemical taggants in tactical locations that would stick to the enemy if they were somewhere

343

Naval Postgraduate School Monterey, California 939435138  

E-Print Network (OSTI)

.........................................................................................................................................1 2. Introduction to Critical Infrastructure and Key Resources (CIKR Resources (CIKR) models and simulations may be used to understand infrastructure systems interdependencies between CIKR systems. The goal of this document is to capture the current knowledge

344

Naval Postgraduate School Monterey, California 939435138  

E-Print Network (OSTI)

. If CUi (R) = Ci,u(R), CUi (R) = Ci,k(R), and CUi (R) = Ci,v, then there exists a task Ti,w in h. If CUi (R) = Ci,v(R), then CUi (R) CUi (S) as the start of task Ti,v may be delayed. If CUi (R) = Ci,k(R

345

Naval Research Laboratory Technologies Available for Licensing ...  

Energy Innovation Portal Technologies. ... Solar Thermal; Startup America; ... equipment, systems and ocean, atmospheric, and space sciences and related technologies.

346

Environmental Scan Page 1 NAVAL POSTGRADUATE SCHOOL  

E-Print Network (OSTI)

Strategy, National Security Strategy, National Military Strategy] The Quadrennial Defense Review 2010://www.defense.gov/defensereviews/ Quadrennial Defense Review web site: http://www.defense.gov/QDR/ · Quadrennial Defense Review Report 2010 http Copy) http://www.usip.org/files/qdr/qdrreport.pdf The final report of the Quadrennial Defense Review

347

Naval Postgraduate School Monterey, California 939435138  

E-Print Network (OSTI)

..............................................................................................................9 The Art of the Deal: How Can the Air Force Successfully Execute Renewable Energy Transactions of an Incident High-Energy Electromagnetic Beam ....21 Fusion Centers: Securing America's Homeland from Threats of an Incident High-Energy Electromagnetic Beam ... 23 Near-Field Imaging of Charge Transport in Gallium Nitride

348

NAVAL RESEARCH LABORATORY Information Technology Solutions  

in energy-storage devices that are: Low Cost Safe to Operate Environmentally Benign Relevant energy ... a time scale of relevance for hybrid electric ...

349

Naval Research Laboratory Technology Marketing Summaries ...  

Biomass and Biofuels; Building Energy Efficiency; Electricity Transmission; Energy Analysis; Energy Storage; ... target imprinted, porous, organosilicate sorbents.

350

Naval Postgraduate School Monterey, California 939435138  

E-Print Network (OSTI)

insuficiencia cardiaca. En el Hospital Central de PEMEX en Salina Cruz, Oaxaca, el 85% de los casos de

351

August 2010 Page 1 NAVAL POSTGRADUATE SCHOOL  

E-Print Network (OSTI)

disciplines: All-source intelligence, counterintelligence (CI), human intelligence (HUMINT), geospatial function of the Army. Intelligence operations are the variety of intelligence and counterintelligence tasks 525-2-1, The U.S. Army Functional Concept for Intelligence, 2016-2028, describes what the Army must do

352

Naval Postgraduate School Monterey, California 939435138  

E-Print Network (OSTI)

; Vlosky 2002 #12;s The first MDF plant started up four years ago and now there are 3 or 4, so furniture for exotic wood veneer layup. Pressing veneer on MDF will give the most defect-free, flat and smooth surface

353

institution Naval Facilities Engineering Command Engineering...  

NLE Websites -- All DOE Office Websites (Extended Search)

will investigate whether a BIPV roof system is structurally sound should not leak for years under normal maintenance and repair and can provide large scale on site renewable...

354

Analytical-Numerical Modeling Of Komatiite Lava Emplacement And Thermal  

Open Energy Info (EERE)

Analytical-Numerical Modeling Of Komatiite Lava Emplacement And Thermal Analytical-Numerical Modeling Of Komatiite Lava Emplacement And Thermal Erosion At Perseverance, Western Australia Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Analytical-Numerical Modeling Of Komatiite Lava Emplacement And Thermal Erosion At Perseverance, Western Australia Details Activities (0) Areas (0) Regions (0) Abstract: We have applied a thermal-fluid dynamic-geochemical model to investigate the emplacement and erosional potential of Archean komatiite flows at Perseverance, Western Australia. Perseverance has been proposed as a site of large-scale thermal erosion by large-volume komatiite eruption(s), resulting in a 100-150-m-deep lava channel containing one of the world's largest komatiite-hosted Fe-Ni-Cu-(PGE) sulfide deposits. Using

355

Numerical Modeling At Coso Geothermal Area (2010) | Open Energy Information  

Open Energy Info (EERE)

10) 10) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Numerical Modeling At Coso Geothermal Area (2010) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Numerical Modeling Activity Date 2010 Usefulness useful DOE-funding Unknown Exploration Basis To determine conditions when fractures nucleate Notes A numerical model was developed using Poly3D to simulate the distribution and magnitude of stress concentration in the vicinity of the borehole floor, and determine the conditions under which petal-centerline fractures nucleate. As a whole, the simulations have demonstrated that a borehole under the stress boundary conditions present at the Coso 58A-10 borehole is able to amplify the stress concentration to produce tension below the

356

Scaling Theory and Numerical Simulations of Aerogel Sintering  

E-Print Network (OSTI)

A simple scaling theory for the sintering of fractal aerogels is presented. The densification at small scales is described by an increase of the lower cut-off length a accompanied by a decrease of the upper cut-off length ?, in order to conserve the total mass of the system. Scaling laws are derived which predict how a, ? and the specific pore surface area ? should depend on the density ?. Following the general ideas of the theory, numerical simulations of sintering are proposed starting from computer simulations of aerogel structure based on a diffusion-limited cluster-cluster aggregation gelling process. The numerical results for a, ? and ? as a function of ? are discussed according to the initial aerogel density. The scaling theory is only fully recovered in the limit of very low density where the original values of a and ? are well separated. These numerical results are compared with experiments on partially densified aerogels.

Rmi Jullien; Nathalie Olivi-tran; Anwar Hasmy; Thierry Woignier; Daniel Bourret; Robert Sempr

2008-01-01T23:59:59.000Z

357

Numerical Modeling At Coso Geothermal Area (2000) | Open Energy Information  

Open Energy Info (EERE)

Numerical Modeling At Coso Geothermal Area (2000) Numerical Modeling At Coso Geothermal Area (2000) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Numerical Modeling Activity Date 2000 Usefulness not indicated DOE-funding Unknown Exploration Basis Determine areas with fault patterns for geothermal development using Poisson's ratio and porosity Notes High-resolution, three-dimensional, compressional and shear wave velocity models, derived from microearthquake travel times, are used to map the distribution of Poisson's ratio and porosity at Coso Geothermal Area. Spatial resolution of the three-dimensional Poisson's ratio and porosity distributions is estimated to be 0.5 km horizontally and 0.8 km vertically. Model uncertainties, + or -1% in the interior and + or -2.3% around the

358

Numerical solutions of differential equations on FPGA-enhanced computers  

E-Print Network (OSTI)

Conventionally, to speed up scientific or engineering (S&E) computation programs on general-purpose computers, one may elect to use faster CPUs, more memory, systems with more efficient (though complicated) architecture, better software compilers, or even coding with assembly languages. With the emergence of Field Programmable Gate Array (FPGA) based Reconfigurable Computing (RC) technology, numerical scientists and engineers now have another option using FPGA devices as core components to address their computational problems. The hardware-programmable, low-cost, but powerful FPGA-enhanced computer has now become an attractive approach for many S&E applications. A new computer architecture model for FPGA-enhanced computer systems and its detailed hardware implementation are proposed for accelerating the solutions of computationally demanding and data intensive numerical PDE problems. New FPGAoptimized algorithms/methods for rapid executions of representative numerical methods such as Finite Difference Methods (FDM) and Finite Element Methods (FEM) are designed, analyzed, and implemented on it. Linear wave equations based on seismic data processing applications are adopted as the targeting PDE problems to demonstrate the effectiveness of this new computer model. Their sustained computational performances are compared with pure software programs operating on commodity CPUbased general-purpose computers. Quantitative analysis is performed from a hierarchical set of aspects as customized/extraordinary computer arithmetic or function units, compact but flexible system architecture and memory hierarchy, and hardwareoptimized numerical algorithms or methods that may be inappropriate for conventional general-purpose computers. The preferable property of in-system hardware reconfigurability of the new system is emphasized aiming at effectively accelerating the execution of complex multi-stage numerical applications. Methodologies for accelerating the targeting PDE problems as well as other numerical PDE problems, such as heat equations and Laplace equations utilizing programmable hardware resources are concluded, which imply the broad usage of the proposed FPGA-enhanced computers.

He, Chuan

2007-05-01T23:59:59.000Z

359

Numerical Wave Modeling in Conditions with Strong Currents: Dissipation, Refraction, and Relative Wind  

Science Conference Proceedings (OSTI)

Currents effects on waves have led to many developments in numerical wave modeling over the past two decades, from numerical choices to parameterizations. The performance of numerical models in conditions with strong currents is reviewed here, and ...

Fabrice Ardhuin; Aron Roland; Franck Dumas; Anne-Claire Bennis; Alexei Sentchev; Philippe Forget; Judith Wolf; Franoise Girard; Pedro Osuna; Michel Benoit

2012-12-01T23:59:59.000Z

360

Optimal numerical realization of the energy balance equation for wind wave models  

Science Conference Proceedings (OSTI)

The optimal numerical realization of the energy balance equation in wind wave models is proposed. The scheme is separated into two parts: the numerical source term integration and the energy propagation numerical realization. The first one is based on ...

Igor V. Lavrenov

2003-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "numerous naval propulsor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Numerical simulation of water flow around a rigid fishing net  

E-Print Network (OSTI)

This paper is devoted to the simulation of the flow around and inside a rigid axisymmetric net. We describe first how experimental data have been obtained. We show in detail the modelization. The model is based on a Reynolds Averaged Navier-Stokes turbulence model penalized by a term based on the Brinkman law. At the out-boundary of the computational box, we have used a "ghost" boundary condition. We show that the corresponding variational problem has a solution. Then the numerical scheme is given and the paper finishes with numerical simulations compared with the experimental data.

Roger Lewandowski; Graldine Pichot

2006-12-20T23:59:59.000Z

362

T.: Numerical sequence extraction in handwritten incoming mail documents  

E-Print Network (OSTI)

In this communication, we propose a method for the automatic extraction of numerical fields in handwritten documents. The approach exploits the known syntactic structure of the numerical field to extract, combined with a set of contextual morphological features to find the best label to each connected component. Applying an HMM based syntactic analyzer on the overall document allows to localize/extract fields of interest. Reported results on the extraction of zip codes, phone numbers and customer codes from handwritten incoming mail documents demonstrate the interest of the proposed approach. 1.

G. Koch; L. Heutte; T. Paquet

2003-01-01T23:59:59.000Z

363

Numerical simulation of graphene in external magnetic field  

E-Print Network (OSTI)

In this paper the results of numerical simulation of monolayer graphene in external magnetic field are presented. The numerical simulation is performed in the effective lattice field theory with noncompact $3 + 1$-dimensional Abelian lattice gauge fields and $2 + 1$-dimensional staggered lattice fermions. The dependences of fermion condensate and graphene conductivity on the dielectric permittivity of substrate for different values of external magnetic field are calculated. It is found that magnetic field shifts insulator-semimetal phase transition to larger values of the dielectric permittivity of substrate. The phase diagram of graphene in external magnetic field is drawn.

D. L. Boyda; V. V. Braguta; S. N. Valgushev; M. I. Polikarpov; M. V. Ulybyshev

2013-08-13T23:59:59.000Z

364

10.34 Numerical Methods Applied to Chemical Engineering, Fall 2001  

E-Print Network (OSTI)

Numerical methods for solving problems arising in heat and mass transfer, fluid mechanics, chemical reaction engineering, and molecular simulation. Topics: numerical linear algebra, solution of nonlinear algebraic equations ...

Beers, Kenneth J.

365

An Integrated Experimental and Numerical Study: Developing a Reaction  

Open Energy Info (EERE)

Integrated Experimental and Numerical Study: Developing a Reaction Integrated Experimental and Numerical Study: Developing a Reaction Transport Model that Couples Chemical Reactions of Mineral Dissolution/Precipitation with Spatial and Temporal Flow Variations in CO2/Brine/Rock Systems Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title An Integrated Experimental and Numerical Study: Developing a Reaction Transport Model that Couples Chemical Reactions of Mineral Dissolution/Precipitation with Spatial and Temporal Flow Variations in CO2/Brine/Rock Systems Project Type / Topic 1 Recovery Act: Enhanced Geothermal Systems Component Research and Development/Analysis Project Type / Topic 2 Supercritical Carbon Dioxide / Reservoir Rock Chemical Interactions Project Description This project will result in a numerical simulator (modified version of TOUGH2) that can adjust porosity and permeability fields according to experimentally observed chemical fluid-rock interactions (mineral dissolution/precipitation) under realistic conditions likely found when supercritical CO2 is injected into geothermal reservoirs for heat energy extraction. The simulator can thus help determine if CO2 injection into EGS brines will cause clogging of pore spaces or dissolution of host rocks with potentially detrimental consequences to heat extraction. As a result, this simulator will play a critical role when assessing long-term sustainability of geothermal energy utilization in enhanced and natural geothermal systems. The simulator can also be used to evaluate long-term CO2 sequestration potentials.

366

Numerical relativity and the formation of black holes  

E-Print Network (OSTI)

Numerical relativity and the formation of black holes J´er^ome Novak (Jerome in fiziko, Univerza v Ljubljani, March, 6th 2012 #12;Plan 1 Introduction 2 Core-collapse supernova 3 Black #12;Outline 1 Introduction 2 Core-collapse supernova 3 Black hole formation 4 General relativity 5

?umer, Slobodan

367

Numerical simulation of cloud droplet formation in a tank  

Science Conference Proceedings (OSTI)

Using the computational fluid dynamics (CFD) code FLUENT 6 together with the fine particle model (FPM), numerical simulations of droplet dynamics in a 12.4m^3 cloud tank were conducted. The coupled fields of water vapor, temperature, flow velocity, particle ... Keywords: Cloud droplet formation, Particle-dynamics modeling, Stirred tank, Turbulence

Matthias Schtze; Frank Stratmann

2008-09-01T23:59:59.000Z

368

Mathematical Models in Landscape Ecology: Stability Analysis and Numerical Tests  

Science Conference Proceedings (OSTI)

In the present paper a review of some mathematical models for the ecological evaluation of environmental systems is considered. Moreover a new model, capable to furnish more detailed information at the level of landscape units, is proposed. Numerical ... Keywords: 34D05, 92F05, Landscape ecology, Mathematical models, Stability analysis

Federica Gobattoni; Giuliana Lauro; Roberto Monaco; Raffaele Pelorosso

2013-06-01T23:59:59.000Z

369

Forecasting the Skill of a Regional Numerical Weather Prediction Model  

Science Conference Proceedings (OSTI)

It is demonstrated that the skill of short-term regional numerical forecasts can be predicted on a day-to-day basis. This was achieved by using a statistical regression scheme with the model forecast errors (MFE) as the predictands and the ...

L. M. Leslie; K. Fraedrich; T. J. Glowacki

1989-03-01T23:59:59.000Z

370

Numerical study of reaction in porous catalysts under composition modulation  

E-Print Network (OSTI)

be solved numerically ALLOCATE(CIM(ngz,ntc),CIV(2,nciv)) !k=k+1; ! index of CIV CIM(j,i)=k; ! store column index ofstore column index of C ELSE CIM(j,i)=0; END IF ELSEIF (i>=

Hsiao, Hsu-Wen

2010-01-01T23:59:59.000Z

371

Wavelet Algorithm for the Numerical Solution of Plane Elasticity Problem  

Science Conference Proceedings (OSTI)

In this paper, we apply Shannon wavelet and Galerkin method to deal with the numerical solution of the natural boundary integral equation of plane elasticity probem in the upper half-plane. The fast algorithm is given and only 3 entries need ... Keywords: Galerkin-wavelet method, Shannon wavelet, natural integral equation, plane elasticity problem

Youjian Shen; Wei Lin

2001-12-01T23:59:59.000Z

372

The Numerical Simulation of Conventional Ground Coalbed Methane Development  

Science Conference Proceedings (OSTI)

The migration, accumulation, and production of coalbed methane (CBM) are absolutely different from the conventional natural gas. The mechanism of the migration and production of CBM are researched and the geological model of CBM reservoir simulation ... Keywords: coalbed methane, numerical simulation, desportion-diffusion, two phase flow, fully implicit finite difference

Lin Xiaoying; Liu Guowei; Su Xianbo

2009-07-01T23:59:59.000Z

373

A Numerical Model for Prediction of Road Temperature and Ice  

Science Conference Proceedings (OSTI)

A numerical model for the prediction of road temperature and ice has been tested on data from a Danish road station. The model is based on the solution of the equation of heat conduction in the ground and the surface energy-balance equation.

Bent H. Sass

1992-12-01T23:59:59.000Z

374

Numerical studies of gravity effects in two-phase reservoirs  

DOE Green Energy (OSTI)

Numerical studies are performed to investigate the effects of localized feed zones on the pressure transients in two-phase reservoirs. It is shown that gravity effects can significantly affect the pressure transients, because of the large difference in the density of liquid water and vapor. Pressure transients for shallow and deep feed zones and the resulting fluid flow patterns are discussed.

Bodvarsson, G.S.; Cox, B.L.

1986-06-01T23:59:59.000Z

375

Numerical simulation of the electron beam welding process  

Science Conference Proceedings (OSTI)

Electron beam welding is a highly efficient and precise welding method that is being increasingly used in industrial manufacturing and is of growing importance in industry. Compared to other welding processes it offers the advantage of very low heat ... Keywords: 3D conical heat source, Electron beam welding (EBW), Heat-affected zone, Numerical simulation, Thermomechanical coupling analysis

Piotr Lacki; Konrad Adamus

2011-06-01T23:59:59.000Z

376

Introduction Application of numerical models of ground water flow  

E-Print Network (OSTI)

Introduction Application of numerical models of ground water flow almost always involves some sort (Yeh 1986; Poeter and Hill 1997; Hill et al. 1998). Other data beside hydraulic head have been used in calibration of ground water models, including rates of ground water exchange with streams and other surface

Saiers, James

377

A numerical algorithm for viscous incompressible interfacial flows  

Science Conference Proceedings (OSTI)

We present a new algorithm to numerically simulate two-dimensional viscous incompressible flows with moving interfaces. The motion is updated in time by using the backward difference formula through an iterative procedure. At each iteration, the pseudo-spectral ... Keywords: Interfacial motion, Stokes waves, Viscous flows

Jin Wang; Greg Baker

2009-08-01T23:59:59.000Z

378

Chimera: A hybrid approach to numerical loop quantum cosmology  

E-Print Network (OSTI)

The existence of a quantum bounce in isotropic spacetimes is a key result in loop quantum cosmology (LQC), which has been demonstrated to arise in all the models studied so far. In most of the models, the bounce has been studied using numerical simulations involving states which are sharply peaked and which bounce at volumes much larger than the Planck volume. An important issue is to confirm the existence of the bounce for states which have a wide spread, or which bounce closer to the Planck volume. Numerical simulations with such states demand large computational domains, making them very expensive and practically infeasible with the techniques which have been implemented so far. To overcome these difficulties, we present an efficient hybrid numerical scheme using the property that at the small spacetime curvature, the quantum Hamiltonian constraint in LQC, which is a difference equation with uniform discretization in volume, can be approximated by a Wheeler-DeWitt differential equation. By carefully choosing a hybrid spatial grid allowing the use of partial differential equations at large volumes, and with a simple change of geometrical coordinate, we obtain a surprising reduction in the computational cost. This scheme enables us to explore regimes which were so far unachievable for the isotropic model in LQC. Our approach also promises to significantly reduce the computational cost for numerical simulations in anisotropic LQC using high performance computing.

Peter Diener; Brajesh Gupt; Parampreet Singh

2013-10-17T23:59:59.000Z

379

On a numerical model for gasification of biomass materials  

Science Conference Proceedings (OSTI)

In this paper, a thermochemical equilibrium model is used to predict the performance of a downdraft gasifier. Numerical results are shown to be in good agreement with those of the experiments. Different biomass materials are tested using the model and ... Keywords: biomass, gasification, mathematical modeling, renewable energy, thermochemical equilibrium

Mahdi Vaezi; Mohammad Passandideh-Fard; Mohammad Moghiman

2007-12-01T23:59:59.000Z

380

Numerical Discretization of Rotated Diffusion Operators in Ocean Models  

Science Conference Proceedings (OSTI)

A method to improve the behavior of the numerical discretization of a rotated diffusion operator such as, for example, the isopycnal diffusion parameterization used in large-scale ocean models based on the so-called z-coordinate system is ...

J-M. Beckers; H. Burchard; E. Deleersnijder; P. P. Mathieu

2000-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "numerous naval propulsor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Numerical Simulation of Blasting Demolition of 16-Storied Structure  

Science Conference Proceedings (OSTI)

The separate element and common node model is setup to simulate reinforced concrete material at first, which could take fully account of the intensity difference of concrete and rebar. And then a 16-storied frame structure is build with this kind of ... Keywords: blasting demoLition, separate element, common node, unidirectional folding collapse, numerical simulation

Guo-liang Yang; Lin-lin Jiang; Chuan Huo

2011-08-01T23:59:59.000Z

382

Structure and Evolution of Numerically Simulated Squall Lines  

Science Conference Proceedings (OSTI)

Using a three-dimensional numerical cloud model, we investigate the effects of vertical wind shear on squall-line structure and evolution over a wide range of shear magnitudes, depths, and orientations relative to the line. We find that the ...

Morris L. Weisman; Joseph B. Klemp; Richard Rotunno

1988-07-01T23:59:59.000Z

383

Numerical Modeling of Internal Tide Generation along the Hawaiian Ridge  

Science Conference Proceedings (OSTI)

Internal M2 tides near Hawaii are investigated with a two-dimensional, two-layer numerical model. It is seen that along the Hawaiian Ridge barotropic tidal energy is transformed into baroclinic internal tides that propagate in both northeast and ...

S. K. Kang; M. G. G. Foreman; W. R. Crawford; J. Y. Cherniawsky

2000-05-01T23:59:59.000Z

384

A numerical study of fluid solid interaction in screw compressors  

Science Conference Proceedings (OSTI)

Efforts are continually being made to produce screw compressors with smaller clearances in order to reduce internal leakage. However, since the compression process induces large pressure differences across the rotors and temperature rise, they deform. ... Keywords: analytical grid generation, clearance reduction, compressor deformation, compressor performance, fluid solid interaction, fuid flow, internal leakage reduction, numerical simulation, rotor deflection, screw compressors

Ahmed Kovacevic; Nikola Stosic; Ian K. Smith

2004-12-01T23:59:59.000Z

385

The Free Kelvin Wave in Finite-Difference Numerical Models  

Science Conference Proceedings (OSTI)

The effects of viscosity and finite- differencing on free Kelvin waves in numerical models (which employ the Arakawa B- or C-grid difference schemes) are investigated using the f-plane shallow-water equations with offshore finite-difference grids,...

William W. Hsieh; Michael K. Davey; Roxana C. Wajsowicz

1983-08-01T23:59:59.000Z

386

Numerical methods for optimal stochastic control in finance  

Science Conference Proceedings (OSTI)

In this thesis, we develop partial differential equation (PDE) based numerical methods to solve certain optimal stochastic control problems in finance. The value of a stochastic control problem is normally identical to the viscosity solution of a Hamilton-Jacobi-Bellman ...

Zhuliang Chen

2008-01-01T23:59:59.000Z

387

Numerical Simulation of Drainage Flow in Brush Creek, Colorado  

Science Conference Proceedings (OSTI)

One of the objectives of the Atmospheric Studies in Complex Terrain (ASCOT) program is to develop numerical models that can be used to aid in the understanding and prediction of flow patterns observed over complex terrain. As part of this program,...

John M. Leone Jr.; Robert L. Lee

1989-06-01T23:59:59.000Z

388

Inverse problem of time-dependent heat sources numerical reconstruction  

Science Conference Proceedings (OSTI)

Abstract: This work studies the inverse problem of reconstructing a time-dependent heat source in the heat conduction equation using the temperature measurement specified at an internal point. Problems of this type have important applications in several ... Keywords: 35R30, 49J20, Green function, Heat source, Inverse problem, Landweber iteration, Numerical results

Liu Yang; Mehdi Dehghan; Jian-Ning Yu; Guan-Wei Luo

2011-04-01T23:59:59.000Z

389

The geomagnetic secularvariation timescale in observations and numerical dynamo models  

E-Print Network (OSTI)

The geomagnetic secularvariation timescale in observations and numerical dynamo models Florian March 2011; published 5 May 2011. [1] The knowledge of the spatial power spectra of the main geomagnetic for recent satellite field models. In the broader context of geomagnetic data assimilation, tSV could provide

Aubert, Julien

390

Numerical Simulations of an Observed Narrow Cold-Frontal Rainband  

Science Conference Proceedings (OSTI)

A cold-frontal rainband, which occurred during the afternoon of 28 December 1988, is numerically simulated using the Penn StateNCAR three-dimensional MM5 modeling system. This case is characterized by a line of severe convection that has a ...

Chaing Chen; Craig H. Bishop; George S. Lai; Wei-Kuo Tao

1997-06-01T23:59:59.000Z

391

Decoupled overlapping grids for the numerical modeling of oil wells  

Science Conference Proceedings (OSTI)

Accurate computation of time-dependent well bore pressure is important in well test analysis - a branch of petroleum engineering where reservoir properties are estimated by comparing measured pressure responses at an oil well to results from a mathematical ... Keywords: Numerical well test analysis, Overlapping grids, Reservoir simulation

Nneoma Ogbonna; Dugald B. Duncan

2012-01-01T23:59:59.000Z

392

Numerical Simulation of Airmass Transformation over the Gulf of Mexico  

Science Conference Proceedings (OSTI)

A mesoscale numerical simulation (35 km) of a return-flow event over the Gulf of Mexico that occurred during the Gulf of Mexico Experiment (GUFMEX) is presented in order to examine the structure and the transformation of the polar air mass and to ...

Jocelyn Mailhot

1992-08-01T23:59:59.000Z

393

Thesis A Numerical Model of Hydro-Thermo- Mechanical Coupling...  

NLE Websites -- All DOE Office Websites (Extended Search)

1 31 53-T Thesis A Numerical Model of Hydro-Thermo- Mechanical Coupling in a Fractured Rock Mass ECEIVED Los Alamos N A T I O N A L L A B O R A T O R Y Los Alamos National...

394

Numerical Simulation Research on Proppant Transport in Hydraulic Fracture  

Science Conference Proceedings (OSTI)

Among the mathematical models of describing the prop pant settling or transport process, the particle settling velocity primarily takes the gravity, buoyancy and other conventional forces into consideration under the equilibrium condition of forces, ... Keywords: hydraulic fracturing, solid-liquid two phaes flow, proppant transport, numerical simulation, predictor-corrector method

Yongming Li; Song Wang; Jinzhou Zhao; Zhang Jiyao; Xiangzeng Wang; Ruimin Gao

2011-10-01T23:59:59.000Z

395

Numerical Modeling At Coso Geothermal Area (1997) | Open Energy Information  

Open Energy Info (EERE)

7) 7) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Numerical Modeling Activity Date 1997 Usefulness useful DOE-funding Unknown Exploration Basis Develop tool to identify low velocity zones by modeling fault-zone guided waves of microearthquakes Notes A numerical method has been employed to simulate the guided-wave propagation from microearthquakes through the fault zone. By comparing observed and synthetic waveforms the fault-zone width and its P-wave and S-wave velocity structure have been estimated. It is suggested that the identification and modeling of guided waves is an effective tool to locate fracture-induced, low-velocity fault-zone structures in geothermal fields. References Lou, M.; Rial, J.A. ; Malin, P.E. (1 July 1997) Modeling

396

22nd International Conference on Numerical Simulation of Plasmas (ICNSP) |  

NLE Websites -- All DOE Office Websites (Extended Search)

September 7, 2011, 9:00am to September 11, 2011, 5:00pm September 7, 2011, 9:00am to September 11, 2011, 5:00pm Conference Long Branch, NJ 22nd International Conference on Numerical Simulation of Plasmas (ICNSP) The purpose of this conference series, which started at the College of William and Mary in 1967 "to disseminate progress in the state-of-the-art of plasma simulation and to report specific applications of computer experiments to various areas of plasma physics," remains unchanged. On the other hand, the topics of the Conference, which has been expanded over the years, now include: Topics: Magnetic & Inertial Fusion Plasmas Space & Astrophysical Plasmas High Intensity Beams & Laser Plasma Interactions Low-temperature Plasmas Numerical Methods & High Performance Computing Scientific Visualization

397

A Numerical Evaluation Of Electromagnetic Methods In Geothermal Exploration  

Open Energy Info (EERE)

GEOTHERMAL ENERGYGeothermal Home GEOTHERMAL ENERGYGeothermal Home Journal Article: A Numerical Evaluation Of Electromagnetic Methods In Geothermal Exploration Details Activities (0) Areas (0) Regions (0) Abstract: The size and low resistivity of the clay cap associated with a geothermal system create a target well suited for electromagnetic (EM) methods and also make electrical detection of the underlying geothermal reservoir a challenge. Using 3-D numerical models, we evaluate four EM techniques for use in geothermal exploration: magnetotellurics (MT), controlled-source audio magnetotellurics (CSAMT), long-offset time-domain EM (LOTEM), and short-offset time-domain EM (TEM). Our results show that all of these techniques can delineate the clay cap, but none can be said to unequivocally detect the reservoir. We do find, however, that the EM

398

Petascale Direct Numerical Simulations of Turbulent Channel Flow  

NLE Websites -- All DOE Office Websites (Extended Search)

Petascale Petascale Direct Numerical Simulations of Turbulent Channel Flow MyoungKyu Lee mk@ices.utexas.edu Department of Mechanical Engineering University of Texas at Austin ESP Meeting May, 2013 M.K. Lee (Univ of Texas, Austin) Petascale DNS of Turbulent Channel Flow ESP Meeting May, 2013 1 / 30 Contents Project Overview Performance Optimization Early Result Conclusion M.K. Lee (Univ of Texas, Austin) Petascale DNS of Turbulent Channel Flow ESP Meeting May, 2013 2 / 30 Project Overview Project Title ◮ Petascale Direct Numerical Simulations of Turbulent Channel Flow Goal ◮ Expanding our understand of wall-bounded turbulence Personnel ◮ P.I. : Robert Moser ◮ Primary Developer : M.K.Lee ◮ Software Engineering Support : Nicholas Malaya ◮ Catalyst : Ramesh Balakrishnan M.K. Lee (Univ of Texas, Austin) Petascale DNS of Turbulent Channel Flow ESP Meeting May, 2013 3 / 30 Turbulent

399

Numerical Modeling At Coso Geothermal Area (2007) | Open Energy Information  

Open Energy Info (EERE)

Coso Geothermal Area (2007) Coso Geothermal Area (2007) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Numerical Modeling At Coso Geothermal Area (2007) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Numerical Modeling Activity Date 2007 Usefulness not indicated DOE-funding Unknown Exploration Basis To determine the importance of fracture networks for fluid migration in tectonically active regions such as the Coso Range. Notes A finite element analysis is used to establish the 3D state of stress within the tectonic setting of the Coso Range. The mean and differential stress distributions are used to infer fluid flow vectors and second order fracture likelihood and orientation. The results show that the Coso Range

400

A Numerical Evaluation Of Electromagnetic Methods In Geothermal Exploration  

Open Energy Info (EERE)

Evaluation Of Electromagnetic Methods In Geothermal Exploration Evaluation Of Electromagnetic Methods In Geothermal Exploration - L Pellerin, J M Johnston & G W Hohmann, Geophysics, 61(1), 1996, Pp 121-130 Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A Numerical Evaluation Of Electromagnetic Methods In Geothermal Exploration - L Pellerin, J M Johnston & G W Hohmann, Geophysics, 61(1), 1996, Pp 121-130 Details Activities (0) Areas (0) Regions (0) Abstract: Unavailable Author(s): Unknown Published: International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1996 Document Number: Unavailable DOI: 10.1016/S0148-9062(97)87449-9 Source: View Original Journal Article Retrieved from "http://en.openei.org/w/index.php?title=A_Numerical_Evaluation_Of_Electromagnetic_Methods_In_Geothermal_Exploration_-_L_Pellerin,_J_M_Johnston_%26_G_W_Hohmann,_Geophysics,_61(1),_1996,_Pp_121-130&oldid=3883

Note: This page contains sample records for the topic "numerous naval propulsor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Numerical investigation of recirculation in the UTSI MHD combustor  

DOE Green Energy (OSTI)

Numerical studies were carried out to investigate the gross structure of flow in cylindrical combustors. The combustor configurations studied are variations of a working design used at the University of Tennessee Space Institute to burn pulverized coal at temperatures in excess of 3000K for generation of a plasma feeding a magnetohydrodynamic channel. The numerical studies were conducted for an isothermal fluid; the main objective of the calculations was to study the effect of the oxidant injection pattern on the gross structure of recirculating flows within the combustor. The calculations illustrate the basic features of the flow in combustors of this type and suggest implications for the injection of coal and oxidizer in this type of combustor.

Schulz, R.J.; Lee, J.J.; Giel, T.V. Jr.

1983-09-01T23:59:59.000Z

402

Numerical method for shear bands in ductile metal with inclusions  

SciTech Connect

A numerical method for mesoscale simulation of high strain-rate loading of ductile metal containing inclusions is described. Because of small-scale inhomogeneities, such a composite material is prone to localized shear deformation (adiabatic shear bands). The modeling framework is the Generalized Method of Cells of Paley and Aboudi [Mech. Materials, vol. 14, pp. /27-139, 1992], which ensures that the micromechanical response of the material is reflected in the behavior of the composite at the mesoscale. To calculate the effective plastic strain rate when shear bands are present, the analytic and numerical analysis of shear bands by Glimm, Plohr, and Sharp [Mech. Materials, vol. 24, pp. 31-41, 1996] is adapted and extended.

Plohr, Jee Yeon N [Los Alamos National Laboratory; Plohr, Bradley J [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

403

Numerical analysis of nanostructures for enhanced light extraction from OLEDs  

E-Print Network (OSTI)

Nanostructures, like periodic arrays of scatters or low-index gratings, are used to improve the light outcoupling from organic light-emitting diodes (OLED). In order to optimize geometrical and material properties of such structures, simulations of the outcoupling process are very helpful. The finite element method is best suited for an accurate discretization of the geometry and the singular-like field profile within the structured layer and the emitting layer. However, a finite element simulation of the overall OLED stack is often beyond available computer resources. The main focus of this paper is the simulation of a single dipole source embedded into a twofold infinitely periodic OLED structure. To overcome the numerical burden we apply the Floquet transform, so that the computational domain reduces to the unit cell. The relevant outcoupling data are then gained by inverse Flouqet transforming. This step requires a careful numerical treatment as reported in this paper.

Zschiedrich, L; Burger, S; Schmidt, F; 10.1117/12.2001132

2013-01-01T23:59:59.000Z

404

NUMERICAL TEST OF IMPROVED NONLINEAR GUIDING CENTER THEORIES  

Science Conference Proceedings (OSTI)

Previous diffusion theories make diverse predictions concerning the ability of slab modes to scatter charged particles across the mean magnetic field. Whereas the original nonlinear guiding center theory provides a strong contribution of slab modes if a two-component model is employed, improved nonlinear guiding center theories describe cross-field transport due to slab modes as a subdiffusive process. Therefore, the slab fluctuations do not explicitly contribute to the perpendicular spatial diffusion coefficient in the late time limit. In the present article, numerical simulations are used to explore the validity of the different predictions. Only a very weak contribution is found due to slab modes. The numerical results confirm improved nonlinear guiding center theories. This conclusion has also implications for cross-field diffusion in three-dimensional turbulence.

Tautz, R. C. [Zentrum fuer Astronomie und Astrophysik, Technische Universitaet Berlin, Hardenbergstrasse 36, D-10623 Berlin (Germany); Shalchi, A., E-mail: rct@gmx.eu, E-mail: andreasm4@yahoo.com [Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2 (Canada)

2011-07-10T23:59:59.000Z

405

Fractional Calculus in Hydrologic Modeling: A Numerical Perspective  

Science Conference Proceedings (OSTI)

Fractional derivatives can be viewed either as a handy extension of classical calculus or, more deeply, as mathematical operators defined by natural phenomena. This follows the view that the diffusion equation is defined as the governing equation of a Brownian motion. In this paper, we emphasize that fractional derivatives come from the governing equations of stable Levy motion, and that fractional integration is the corresponding inverse operator. Fractional integration, and its multi-dimensional extensions derived in this way, are intimately tied to fractional Brownian (and Levy) motions and noises. By following these general principles, we discuss the Eulerian and Lagrangian numerical solutions to fractional partial differential equations, and Eulerian methods for stochastic integrals. These numerical approximations illuminate the essential nature of the fractional calculus.

David A. Benson; Mark M. Meerschaert; Jordan Revielle

2012-01-01T23:59:59.000Z

406

Numerical Solution of the Expanding Stellar Atmosphere Problem  

E-Print Network (OSTI)

In this paper we discuss numerical methods and algorithms for the solution of NLTE stellar atmosphere problems involving expanding atmospheres, e.g., found in novae, supernovae and stellar winds. We show how a scheme of nested iterations can be used to reduce the high dimension of the problem to a number of problems with smaller dimensions. As examples of these sub-problems, we discuss the numerical solution of the radiative transfer equation for relativistically expanding media with spherical symmetry, the solution of the multi-level non-LTE statistical equilibrium problem for extremely large model atoms, and our temperature correction procedure. Although modern iteration schemes are very efficient, parallel algorithms are essential in making large scale calculations feasible, therefore we discuss some parallelization schemes that we have developed.

Hauschildt, P H

1998-01-01T23:59:59.000Z

407

Numerical Solution of the Expanding Stellar Atmosphere Problem  

E-Print Network (OSTI)

In this paper we discuss numerical methods and algorithms for the solution of NLTE stellar atmosphere problems involving expanding atmospheres, e.g., found in novae, supernovae and stellar winds. We show how a scheme of nested iterations can be used to reduce the high dimension of the problem to a number of problems with smaller dimensions. As examples of these sub-problems, we discuss the numerical solution of the radiative transfer equation for relativistically expanding media with spherical symmetry, the solution of the multi-level non-LTE statistical equilibrium problem for extremely large model atoms, and our temperature correction procedure. Although modern iteration schemes are very efficient, parallel algorithms are essential in making large scale calculations feasible, therefore we discuss some parallelization schemes that we have developed.

P. H. Hauschildt; E. Baron

1998-08-18T23:59:59.000Z

408

Numerical Studies of Particle Laden Flow in Dispersed Phase  

E-Print Network (OSTI)

To better understand the hydrodynamic flow behavior in turbulence, Particle-Fluid flow have been studied using our Direct Numerical(DNS) based software DSM on MUSCL-QUICK and finite volume algorithm. The particle flow was studied using Eulerian-Eulerian Quasi Brownian Motion(QBM) based approach. The dynamics is shown for various particle sizes which are very relevant to spray mechanism for Industrial applications and Bio medical applications.

Dutta, R

2012-01-01T23:59:59.000Z

409

Numerical Analysis of a Cold Air Distribution System  

E-Print Network (OSTI)

Cold air distribution systems may reduce the operating energy consumption of air-conditioned air supply system and improve the outside air volume percentages and indoor air quality. However, indoor temperature patterns and velocity field are easily non-uniform so that residents usually feel uncomfortable. The distribution of indoor airflow by cold air distribution is researched in this paper. We study indoor air distribution under different low temperature air supply conditions by numerical simulation. The simulated results agree well with the experiments.

Zhu, L.; Li, R.; Yuan, D.

2006-01-01T23:59:59.000Z

410

Numerical modeling of injection experiments at The Geysers  

DOE Green Energy (OSTI)

Data from injection experiments in the southeast Geysers are presented that show strong interference (both negative and positive) with a neighboring production well. Conceptual and numerical models are developed that explain the negative interference (decline of production rate) in terms of heat transfer limitations and water-vapor relative permeability effects. Recovery and over-recovery following injection shut-in are attributed to boiling of injected fluid, with heat of vaporization provided by the reservoir rocks.

Pruess, K. [Lawrence Berkeley Lab., CA (United States); Enedy, S. [Northern California Power Agency, Middletown, CA (United States)

1993-01-01T23:59:59.000Z

411

Numerical simulations of the decay of primordial magnetic turbulence  

SciTech Connect

We perform direct numerical simulations of forced and freely decaying 3D magnetohydrodynamic turbulence in order to model magnetic field evolution during cosmological phase transitions in the early Universe. Our approach assumes the existence of a magnetic field generated either by a process during inflation or shortly thereafter, or by bubble collisions during a phase transition. We show that the final configuration of the magnetic field depends on the initial conditions, while the velocity field is nearly independent of initial conditions.

Kahniashvili, Tina [McWilliams Center for Cosmology and Department of Physics, Carnegie Mellon University, 5000 Forbes Ave, Pittsburgh, Pennsylvania 15213 (United States); Department of Physics, Laurentian University, Ramsey Lake Road, Sudbury, ON P3E 2C (Canada); Abastumani Astrophysical Observatory, Ilia State University, 2A Kazbegi Ave, Tbilisi, GE-0160 (Georgia); Brandenburg, Axel [Nordita, AlbaNova University Center, Roslagstullsbacken 23, 10691 Stockholm (Sweden); Department of Astronomy, Stockholm University, SE 10691 Stockholm (Sweden); Tevzadze, Alexander G. [Abastumani Astrophysical Observatory, Ilia State University, 2A Kazbegi Ave, Tbilisi, GE-0160 (Georgia); Faculty of Exact and Natural Sciences, Tbilisi State University, 1 Chavchavadze Avenue Tbilisi, GE-0128 (Georgia); Ratra, Bharat [Department of Physics, Kansas State University, 116 Cardwell Hall, Manhattan, Kansas 66506 (United States)

2010-06-15T23:59:59.000Z

412

Numerical models for the evaluation of geothermal systems  

DOE Green Energy (OSTI)

We have carried out detailed simulations of various fields in the USA (Bada, New Mexico; Heber, California); Mexico (Cerro Prieto); Iceland (Krafla); and Kenya (Olkaria). These simulation studies have illustrated the usefulness of numerical models for the overall evaluation of geothermal systems. The methodology for modeling the behavior of geothermal systems, different approaches to geothermal reservoir modeling and how they can be applied in comprehensive evaluation work are discussed.

Bodvarsson, G.S.; Pruess, K.; Lippmann, M.J.

1986-08-01T23:59:59.000Z

413

Physical and numerical modeling of Joule-heated melters  

SciTech Connect

The Joule-heated ceramic-lined melter is an integral part of the high level waste immobilization process under development by the US Department of Energy. Scaleup and design of this waste glass melting furnace requires an understanding of the relationships between melting cavity design parameters and the furnace performance characteristics such as mixing, heat transfer, and electrical requirements. Developing empirical models of these relationships through actual melter testing with numerous designs would be a very costly and time consuming task. Additionally, the Pacific Northwest Laboratory (PNL) has been developing numerical models that simulate a Joule-heated melter for analyzing melter performance. This report documents the method used and results of this modeling effort. Numerical modeling results are compared with the more conventional, physical modeling results to validate the approach. Also included are the results of numerically simulating an operating research melter at PNL. Physical Joule-heated melters modeling results used for qualiying the simulation capabilities of the melter code included: (1) a melter with a single pair of electrodes and (2) a melter with a dual pair (two pairs) of electrodes. The physical model of the melter having two electrode pairs utilized a configuration with primary and secondary electrodes. The principal melter parameters (the ratio of power applied to each electrode pair, modeling fluid depth, electrode spacing) were varied in nine tests of the physical model during FY85. Code predictions were made for five of these tests. Voltage drops, temperature field data, and electric field data varied in their agreement with the physical modeling results, but in general were judged acceptable. 14 refs., 79 figs., 17 tabs.

Eyler, L.L.; Skarda, R.J.; Crowder, R.S. III; Trent, D.S.; Reid, C.R.; Lessor, D.L.

1985-10-01T23:59:59.000Z

414

1 Numerical study of dense adjoint 2-color matter ?  

E-Print Network (OSTI)

We study the global symmetries of SU(2) gauge theory with N flavors of staggered fermions in the presence of a chemical potential. We motivate the special interest of the case N = 1 (staggered) with fermions in the adjoint representation of the gauge group. We present results from numerical simulations with both hybrid Monte Carlo and the Two-Step Multi-Bosonic algorithm. 1.

Simon H; Istvn Montvay B; Manfred Oevers C; Luigi Scorzato A; Jonivar Skullerud B

2000-01-01T23:59:59.000Z

415

Cloud Statistics in Numerical Simulations of the ISM  

E-Print Network (OSTI)

We present preliminary results on the energy budgets of clouds in two-dimensional numerical simulations of the interstellar medium. Using an automated cloud-identification algorithm, we calculate the gravitational, internal, kinetic and magnetic energies of the clouds. We find that, within a dispersion of roughly one order of magnitude, the gravitational energy in the clouds is balanced by the remaining energies. Furthermore, within the same dispersion, there appears to be equipartition between the kinetic and magnetic energies.

J. Ballesteros-Paredes; E. Vazquez-Semadeni

1996-02-01T23:59:59.000Z

416

Final joint environmental assessment for the construction and routine operation of a 12-kilovolt (KV) overhead powerline right-of-way, and formal authorization for a 10-inch and 8-inch fresh water pipeline right-of-way, Naval Petroleum Reserve No. 1, Kern County, California  

SciTech Connect

The purpose and need of the proposed action, which is the installation of an overhead powerline extension from an Naval Petroleum Reserve No. 1 (NPR-1) power source to the WKWD Station A, is to significantly reduce NPR-1`s overall utility costs. While the proposed action is independently justified on its own merits and is not tied to the proposed NPR-1 Cogeneration Facility, the proposed action would enable DOE to tie the NPR-1 fresh water pumps at Station A into the existing NPR-1 electrical distribution system. With the completion of the cogeneration facility in late 1994 or early 1995, the proposed action would save additional utility costs. This report deals with the environmental impacts of the construction of the powerline and the water pipeline. In addition, information is given about property rights and attaining permission to cross the property of proposed affected owners.

1994-10-01T23:59:59.000Z

417

Experimental and Numerical Examination of the Thermal Transmittance of High  

NLE Websites -- All DOE Office Websites (Extended Search)

Experimental and Numerical Examination of the Thermal Transmittance of High Experimental and Numerical Examination of the Thermal Transmittance of High Performance Window Frames Title Experimental and Numerical Examination of the Thermal Transmittance of High Performance Window Frames Publication Type Conference Paper LBNL Report Number LBNL-3886E Year of Publication 2010 Authors Gustavsen, Arlid, Goce Talev, Dariush K. Arasteh, Howdy Goudey, Christian Kohler, Sivert Uvsløkk, and Bjørn Petter Jelle Conference Name Thermal Performance of the Exterior Envelopes of Whole Buildings XI International Conference Date Published Dec 5-9, 2010 Conference Location Clearwater Beach, FL Call Number LBNL-3886E Abstract While window frames typically represent 20-30% of the overall window area, their impact on the total window heat transfer rates may be much larger. This effect is even greater in low-conductance (highly insulating) windows which incorporate very low conductance glazings. Developing low-conductance window frames requires accurate simulation tools for product research and development.

418

Numerical simulation of the hydrodynamical combustion to strange quark matter  

Science Conference Proceedings (OSTI)

We present results from a numerical solution to the burning of neutron matter inside a cold neutron star into stable u,d,s quark matter. Our method solves hydrodynamical flow equations in one dimension with neutrino emission from weak equilibrating reactions, and strange quark diffusion across the burning front. We also include entropy change from heat released in forming the stable quark phase. Our numerical results suggest burning front laminar speeds of 0.002-0.04 times the speed of light, much faster than previous estimates derived using only a reactive-diffusive description. Analytic solutions to hydrodynamical jump conditions with a temperature-dependent equation of state agree very well with our numerical findings for fluid velocities. The most important effect of neutrino cooling is that the conversion front stalls at lower density (below {approx_equal}2 times saturation density). In a two-dimensional setting, such rapid speeds and neutrino cooling may allow for a flame wrinkle instability to develop, possibly leading to detonation.

Niebergal, Brian; Ouyed, Rachid [Department of Physics and Astronomy, University of Calgary, 2500 University Drive NW, Calgary, Alberta, T2N 1N4 (Canada); Jaikumar, Prashanth [Department of Physics and Astronomy, California State University Long Beach, 1250 Bellflower Blvd., Long Beach, California 90840 (United States); Institute of Mathematical Sciences, C.I.T. Campus, Chennai, TN 600113 (India)

2010-12-15T23:59:59.000Z

419

Numerical Modeling of Complex Porous Media For Borehole Applications  

E-Print Network (OSTI)

The diffusion/relaxation behavior of polarized spins of pore filling fluid, as often probed by NMR relaxometry, is widely used to extract information on the pore-geometry. Such information is further interpreted as an indicator of the key transport property of the formation in the oil industry. As the importance of reservoirs with complex pore geometry grows, so does the need for deeper understanding of how these properties are inter-related. Numerical modeling of relevant physical processes using a known pore geometry promises to be an effective tool in such endeavor. Using a suite of numerical techniques based on random-walk (RW) and Lattice-Boltzmann (LB) algorithms, we compare sandstone and carbonate pore geometries in their impact on NMR and flow properties. For NMR relaxometry, both laboratory measurement and simulation were done on the same source to address some of the long-standing issues in its borehole applications. Through a series of "numerical experiments" in which the interfacial relaxation properties of the pore matrix is varied systematically, we study the effect of a variable surface relaxivity while fully incorporating the complexity of the pore geometry. From combined RW and LB simulations, we also obtain diffusion-convection propagator and compare the result with experimental and network-simulation counterparts.

Seungoh Ryu; Weishu Zhao; Gabriela Leu; Philip M. Singer; Hyung Joon Cho; Youngseuk Keehm

2009-08-13T23:59:59.000Z

420

Numerical Modeling of WECS at Ecole Centrale de Nantes  

NLE Websites -- All DOE Office Websites (Extended Search)

LHEEA LHEEA CNRS UMR 6598 Laboratoire de recherche en Hydrodynamique Énergétique et Environnement Atmosphérique Numerical modelling of Wave Energy Converters at LHEEA Lab Ecole Centrale de Nantes (France) Alain H. CLEMENT Senior researcher Ocean Energy and Ocean Waves Group NREL MHK Workshop - Broomfield (CO) - 9-10 July 2012 LHEEA CNRS UMR 6598 Laboratoire de recherche en Hydrodynamique Énergétique et Environnement Atmosphérique NREL MHK Workshop - Broomfield (CO) - 9-10 July 2012 The Ocean Energy and Waves group @ LHEEA Lab. LHEEA Lab. : Hydrodynamics, Energetics and Atmospheric Environment Staff : 100, Director : Prof. Pierre Ferrant

Note: This page contains sample records for the topic "numerous naval propulsor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Numerical analysis of decoy state quantum key distribution protocols  

SciTech Connect

Decoy state protocols are a useful tool for many quantum key distribution systems implemented with weak coherent pulses, allowing significantly better secret bit rates and longer maximum distances. In this paper we present a method to numerically find optimal three-level protocols, and we examine how the secret bit rate and the optimized parameters are dependent on various system properties, such as session length, transmission loss, and visibility. Additionally, we show how to modify the decoy state analysis to handle partially distinguishable decoy states as well as uncertainty in the prepared intensities.

Harrington, Jim W [Los Alamos National Laboratory; Rice, Patrick R [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

422

ASSIMILATION OF DOPPLER RADAR DATA INTO NUMERICAL WEATHER MODELS  

Science Conference Proceedings (OSTI)

During the year 2008, the United States National Weather Service (NWS) completed an eight fold increase in sampling capability for weather radars to 250 m resolution. This increase is expected to improve warning lead times by detecting small scale features sooner with increased reliability; however, current NWS operational model domains utilize grid spacing an order of magnitude larger than the radar data resolution, and therefore the added resolution of radar data is not fully exploited. The assimilation of radar reflectivity and velocity data into high resolution numerical weather model forecasts where grid spacing is comparable to the radar data resolution was investigated under a Laboratory Directed Research and Development (LDRD) 'quick hit' grant to determine the impact of improved data resolution on model predictions with specific initial proof of concept application to daily Savannah River Site operations and emergency response. Development of software to process NWS radar reflectivity and radial velocity data was undertaken for assimilation of observations into numerical models. Data values within the radar data volume undergo automated quality control (QC) analysis routines developed in support of this project to eliminate empty/missing data points, decrease anomalous propagation values, and determine error thresholds by utilizing the calculated variances among data values. The Weather Research and Forecasting model (WRF) three dimensional variational data assimilation package (WRF-3DVAR) was used to incorporate the QC'ed radar data into input and boundary conditions. The lack of observational data in the vicinity of SRS available to NWS operational models signifies an important data void where radar observations can provide significant input. These observations greatly enhance the knowledge of storm structures and the environmental conditions which influence their development. As the increase in computational power and availability has made higher resolution real-time model simulations possible, the need to obtain observations to both initialize numerical models and verify their output has become increasingly important. The assimilation of high resolution radar observations therefore provides a vital component in the development and utility of numerical model forecasts for both weather forecasting and contaminant transport, including future opportunities to improve wet deposition computations explicitly.

Chiswell, S.; Buckley, R.

2009-01-15T23:59:59.000Z

423

Numerical Simulation Study on Transpired Solar Air Collector  

E-Print Network (OSTI)

The unglazed transpired solar air collector is now a well-recognized solar air heater for heating outside air directly. In this article, researchers introduced numerical simulation tools into the solar air collector research area, analyzed the performance characteristics of the unglazed transpired solar air collector and compared them with several kinds of traditional solar air collectors. The results showed that the unglazed transpired solar air collector has unparalleled advantages in the ventilation preheating area and also proves that CFD tools have their own advantages in the solar air collector research area.

Wang, C.; Guan, Z.; Zhao, X.; Wang, D.

2006-01-01T23:59:59.000Z

424

Numerical methods for systems of highly oscillatory ordinary differential equations  

E-Print Network (OSTI)

) of the Jacobian or an approx- imation to it, inside the numerical method. Various methods have been developed for the differential equation y(t) = f(y(t)) = Ly(t) +N(y(t)) with y(tn) = yn. 7 1.3 Exponential integrators The first paper to construct what are now... ?(t) = f(yn?1) + f ?(yn?1)(y ? yn?1). The exact solution to this linearised problem is yn = yn?1 + h?1(hf ?(yn?1))f(yn?1), where the function ?1 , is defined as ?1(z) = ez ? 1 z . This method is of order two, for general problems of the form f...

Khanamiryan, Marianna

2010-06-08T23:59:59.000Z

425

Numerical simulation of reservoir compaction in liquid dominated geothermal systems  

DOE Green Energy (OSTI)

A numerical model is introduced which simulates the effects of fluid production as well as reinjection on the vertical deformation of water dominated geothermal reservoirs. This program, based on an Integrated Finite Difference technique and Terzaghi's one-dimensional consolidation model, computes the transport of heat and water through porous media, and resulting pore volume changes. Examples are presented to show the effects of reservoir heterogeneities on the compaction of these hot water systems, as well as the effects of different production-injection schemes. The use of isothermal models to simulate the deformation of non-isothermal systems was also investigated.

Lippmann, M.J.; Narasimhan, T.N.; Witherspoon, P.A.

1976-12-01T23:59:59.000Z

426

Improved Numerical Method for Calculation of 4-Body Transition Amplitudes  

E-Print Network (OSTI)

In order to study 4-body atomic collisions such as excitation-ionization, transfer with target excitation, and double electron capture, the calculation of a nine-dimensional numerical integral is often required. This calculation can become computationally expensive, especially when calculating fully differential cross sections (FDCS), where the positions and momenta of all the particles are known. We have developed a new technique for calculating FDCS using fewer computing hours, but more memory. This new technique allows for much more efficient calculations and the use of many fewer resources.

Harris, A L

2013-01-01T23:59:59.000Z

427

Numerical modelling of current transfer in nonlinear anisotropic conductive media  

E-Print Network (OSTI)

load vector and components of f jiM,M global damping matrix and components of M U nodal points of W Index of abbreviations HTS high temperature superconductor Bi-2212 Bi2Sr2CaCu2Ox Y-123 YBa2Cu3Ox EJ the electric field dependence upon the local current... experimental technique is presented. A mathematical analysis is also outlined that enables part of the magnetic field profile to be deduced directly from transport measurements. Chapter 4 discusses the principal approaches used in the numerical solution...

Baranowski, Robert Paul

428

Advanced numerical methods in mesh generation and mesh adaptation  

SciTech Connect

Numerical solution of partial differential equations requires appropriate meshes, efficient solvers and robust and reliable error estimates. Generation of high-quality meshes for complex engineering models is a non-trivial task. This task is made more difficult when the mesh has to be adapted to a problem solution. This article is focused on a synergistic approach to the mesh generation and mesh adaptation, where best properties of various mesh generation methods are combined to build efficiently simplicial meshes. First, the advancing front technique (AFT) is combined with the incremental Delaunay triangulation (DT) to build an initial mesh. Second, the metric-based mesh adaptation (MBA) method is employed to improve quality of the generated mesh and/or to adapt it to a problem solution. We demonstrate with numerical experiments that combination of all three methods is required for robust meshing of complex engineering models. The key to successful mesh generation is the high-quality of the triangles in the initial front. We use a black-box technique to improve surface meshes exported from an unattainable CAD system. The initial surface mesh is refined into a shape-regular triangulation which approximates the boundary with the same accuracy as the CAD mesh. The DT method adds robustness to the AFT. The resulting mesh is topologically correct but may contain a few slivers. The MBA uses seven local operations to modify the mesh topology. It improves significantly the mesh quality. The MBA method is also used to adapt the mesh to a problem solution to minimize computational resources required for solving the problem. The MBA has a solid theoretical background. In the first two experiments, we consider the convection-diffusion and elasticity problems. We demonstrate the optimal reduction rate of the discretization error on a sequence of adaptive strongly anisotropic meshes. The key element of the MBA method is construction of a tensor metric from hierarchical edge-based error estimates. We conclude that the quasi-optimal mesh must be quasi-uniform in this metric. All numerical experiments are based on the publicly available Ani3D package, the collection of advanced numerical instruments.

Lipnikov, Konstantine [Los Alamos National Laboratory; Danilov, A [MOSCOW, RUSSIA; Vassilevski, Y [MOSCOW, RUSSIA; Agonzal, A [UNIV OF LYON

2010-01-01T23:59:59.000Z

429

Numerical Simulation of Multicomponent Ion Beam from Ion Sources  

E-Print Network (OSTI)

A program library for numerical simulation of a multicomponent charged particle beam from ion sources is presented. The library is aimed for simulation of high current, low energy multicomponent ion beam from ion source through beamline and realized under the Windows user interface for the IBM PC. It is used for simulation and optimization of beam dynamics and based on successive and consistent application of two methods: the momentum method of distribution function (RMS technique) and particle in cell method. The library has been used to simulate and optimize the transportation of tantalum ion beam from the laser ion source (CERN) and calcium ion beam from the ECR ion source (JINR, Dubna).

Alexandrov, V S; Kazarinov, Yu M; Shevtsov, V P; Shirkov, G D

1999-01-01T23:59:59.000Z

430

Numerical investigations into the formation of a high temperature reservoir''  

DOE Green Energy (OSTI)

This paper summarizes an ongoing numerical modeling effort aimed at describing some of the thermodynamic conditions observed in vapor- dominated reservoirs, including the formation of a high temperature reservoir (HTR) beneath the typical'' reservoir. The modeled system begins as a hot water geothermal reservoir, and evolves through time into a vapor-dominated reservoir with a HTR at depth. This approach taken here to develop a vapor-dominated system is similar to that of Pruess (1985), and involves induced boiling through venting. The reservoir description is intentionally generic, but serves to describe a means of evolution of conditions observed (in particular) The Geysers.

Shook, M.

1993-01-01T23:59:59.000Z

431

Numerical investigations into the formation of a ``high temperature reservoir``  

DOE Green Energy (OSTI)

This paper summarizes an ongoing numerical modeling effort aimed at describing some of the thermodynamic conditions observed in vapor- dominated reservoirs, including the formation of a high temperature reservoir (HTR) beneath the ``typical`` reservoir. The modeled system begins as a hot water geothermal reservoir, and evolves through time into a vapor-dominated reservoir with a HTR at depth. This approach taken here to develop a vapor-dominated system is similar to that of Pruess (1985), and involves induced boiling through venting. The reservoir description is intentionally generic, but serves to describe a means of evolution of conditions observed (in particular) The Geysers.

Shook, M.

1993-04-01T23:59:59.000Z

432

Thermoinertial bouncing of a relativistic collapsing sphere: A numerical model  

Science Conference Proceedings (OSTI)

We present a numerical model of a collapsing radiating sphere, whose boundary surface undergoes bouncing due to a decreasing of its inertial mass density (and, as expected from the equivalence principle, also of the 'gravitational' force term) produced by the 'inertial' term of the transport equation. This model exhibits for the first time the consequences of such an effect, and shows that under physically reasonable conditions this decreasing of the gravitational term in the dynamic equation may be large enough as to revert the collapse and produce a bouncing of the boundary surface of the sphere.

Herrera, L.; Di Prisco, A.; Barreto, W. [Centro de Fisica Teorica y Computacional, Facultad de Ciencias, Universidad Central de Venezuela, Caracas (Venezuela); Centro de Fisica Fundamental, Facultad de Ciencias, Universidad de los Andes, Merida (Venezuela)

2006-01-15T23:59:59.000Z

433

Numerical Modeling At Coso Geothermal Area (2006) | Open Energy Information  

Open Energy Info (EERE)

2006) 2006) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Numerical Modeling Activity Date 2006 Usefulness useful DOE-funding Unknown Exploration Basis Determine areas of high permeability using isotope transport and exchange analysis Notes Finite element models of single-phase, variable-density fluid flow, conductive- convective heat transfer, fluid-rock isotope exchange, and groundwater residence times were developed. Using detailed seismic reflection data and geologic mapping, a regional cross-sectional model was constructed that extends laterally from the Sierra Nevada to Wildhorse Mesa, west of the Argus Range. The findings suggest that active faults and seismogenic zones in and around the Coso geothermal area have much higher

434

VNIIEF VNIIEF Methods of Numerical Simulation for Multi-  

National Nuclear Security Administration (NNSA)

32 32 VNIIEF VNIIEF Methods of Numerical Simulation for Multi- Methods of Numerical Simulation for Multi- Dimensional Gas Dynamic Flows Dimensional Gas Dynamic Flows Spir Spiri idonov donov V.F V.F., ., Bakhrakh Bakhrakh S.M., S.M., Velichko Velichko S.V., S.V., Delov Delov V.I., V.I., Yanilkin Yu.V Yanilkin Yu.V., ., Sokolov Sokolov S.S., S.S., Butnev Butnev O.I, O.I, Stenin Stenin A.M., A.M., Zmushko Zmushko V.V., V.V., Voronin Voronin B.L., B.L., Bykov Bykov A.N. A.N. RFCN-VNIIEF, 607190, RFCN-VNIIEF, 607190, Sarov Sarov, , Nizhni Nizhni Novgorod region Novgorod region Joint Russian-American Five-Laboratory Conference on Computation Joint Russian-American Five-Laboratory Conference on Computation Mathematics|Physics Mathematics|Physics 19-23 June 2005, 19-23 June 2005, Crowne

435

Boundary conditions for Einstein's field equations: Analytical and numerical analysis  

E-Print Network (OSTI)

Outer boundary conditions for strongly and symmetric hyperbolic formulations of 3D Einstein's field equations with a live gauge condition are discussed. The boundary conditions have the property that they ensure constraint propagation and control in a sense made precise in this article the physical degrees of freedom at the boundary. We use Fourier-Laplace transformation techniques to find necessary conditions for the well posedness of the resulting initial-boundary value problem and integrate the resulting three-dimensional nonlinear equations using a finite-differencing code. We obtain a set of constraint-preserving boundary conditions which pass a robust numerical stability test. We explicitly compare these new boundary conditions to standard, maximally dissipative ones through Brill wave evolutions. Our numerical results explicitly show that in the latter case the constraint variables, describing the violation of the constraints, do not converge to zero when resolution is increased while for the new boundary conditions, the constraint variables do decrease as resolution is increased. As an application, we inject pulses of ``gravitational radiation'' through the boundaries of an initially flat spacetime domain, with enough amplitude to generate strong fields and induce large curvature scalars, showing that our boundary conditions are robust enough to handle nonlinear dynamics. We expect our boundary conditions to be useful for improving the accuracy and stability of current binary black hole and binary neutron star simulations, for a successful implementation of characteristic or perturbative matching techniques, and other applications. We also discuss limitations of our approach and possible future directions.

Olivier Sarbach; Manuel Tiglio

2004-12-22T23:59:59.000Z

436

CDIAC catalog of numeric data packages and computer model packages  

Science Conference Proceedings (OSTI)

The Carbon Dioxide Information Analysis Center acquires, quality-assures, and distributes to the scientific community numeric data packages (NDPs) and computer model packages (CMPs) dealing with topics related to atmospheric trace-gas concentrations and global climate change. These packages include data on historic and present atmospheric CO{sub 2} and CH{sub 4} concentrations, historic and present oceanic CO{sub 2} concentrations, historic weather and climate around the world, sea-level rise, storm occurrences, volcanic dust in the atmosphere, sources of atmospheric CO{sub 2}, plants` response to elevated CO{sub 2} levels, sunspot occurrences, and many other indicators of, contributors to, or components of climate change. This catalog describes the packages presently offered by CDIAC, reviews the processes used by CDIAC to assure the quality of the data contained in these packages, notes the media on which each package is available, describes the documentation that accompanies each package, and provides ordering information. Numeric data are available in the printed NDPs and CMPs, in CD-ROM format, and from an anonymous FTP area via Internet. All CDIAC information products are available at no cost.

Boden, T.A. [Oak Ridge National Lab., TN (United States). Carbon Dioxide Information Analysis Center; O`Hara, F.M. Jr. [O`Hara (Fred M., Jr.), Oak Ridge, TN (US); Stoss, F.W. [Univ. of Tennessee, Knoxville, TN (US). Energy, Environment, and Resources Center

1993-05-01T23:59:59.000Z

437

Free and constrained symplectic integrators for numerical general relativity  

E-Print Network (OSTI)

We consider symplectic time integrators in numerical General Relativity and discuss both free and constrained evolution schemes. For free evolution of ADM-like equations we propose the use of the Stoermer-Verlet method, a standard symplectic integrator which here is explicit in the computationally expensive curvature terms. For the constrained evolution we give a formulation of the evolution equations that enforces the momentum constraints in a holonomically constrained Hamiltonian system and turns the Hamilton constraint function from a weak to a strong invariant of the system. This formulation permits the use of the constraint-preserving symplectic RATTLE integrator, a constrained version of the Stoermer-Verlet method. The behavior of the methods is illustrated on two effectively 1+1-dimensional versions of Einstein's equations, that allow to investigate a perturbed Minkowski problem and the Schwarzschild space-time. We compare symplectic and non-symplectic integrators for free evolution, showing very different numerical behavior for nearly-conserved quantities in the perturbed Minkowski problem. Further we compare free and constrained evolution, demonstrating in our examples that enforcing the momentum constraints can turn an unstable free evolution into a stable constrained evolution. This is demonstrated in the stabilization of a perturbed Minkowski problem with Dirac gauge, and in the suppression of the propagation of boundary instabilities into the interior of the domain in Schwarzschild space-time.

Ronny Richter; Christian Lubich

2008-07-07T23:59:59.000Z

438

MAGNETIZATION DEGREE OF GAMMA-RAY BURST FIREBALLS: NUMERICAL STUDY  

Science Conference Proceedings (OSTI)

The relative strength between forward and reverse shock emission in early gamma-ray burst (GRB) afterglow reflects that of magnetic energy densities in the two shock regions. We numerically show that with the current standard treatment, the fireball magnetization is underestimated by up to two orders of magnitude. This discrepancy is especially large in the sub-relativistic reverse shock regime (i.e., the thin shell and intermediate regime), where most optical flashes were detected. We provide new analytic estimates of the reverse shock emission based on a better shock approximation, which well describe numerical results in the intermediate regime. We show that the reverse shock temperature at the onset of afterglow is constant, ( {Gamma}-bar{sub d}-1){approx}8 Multiplication-Sign 10{sup -2}, when the dimensionless parameter {xi}{sub 0} is more than several. Our approach is applied to case studies of GRB 990123 and 090102, and we find that magnetic fields in the fireballs are even stronger than previously believed. However, these events are still likely to be due to a baryonic jet with {sigma} {approx} 10{sup -3} for GRB 990123 and {approx}3 Multiplication-Sign 10{sup -4} to 3 for GRB 090102.

Harrison, Richard; Kobayashi, Shiho, E-mail: R.M.Harrison@2006.ljmu.ac.uk [Astrophysics Research Institute, Liverpool John Moores University, Liverpool, L3 5RF (United Kingdom)

2013-08-01T23:59:59.000Z

439

Experimental and numerical analysis of a deepwater mini-TLP  

E-Print Network (OSTI)

As the quest for oil and gas resources drives the industry to ever deeper waters, model testing still represents an essential step after numerical modeling when designing offshore platforms in these hostile environments. In an attempt to better understand the overall response behavior of a small-size deepwater tension leg platform (TLP) designed by the offshore industry, an experimental campaign was led at the Offshore Technology Research Center (OTRC) in cooperation with Statoil. Time-domain statistics and dimensionless ratios are used to characterize the environmental design sea conditions. Similar methods are utilized to examine the critical issues of the clearance between the wave train crests and the underside of the platform's deck, and the wave run-up on the TLP columns. Rough estimations of the wave forces applied on the hull are given by a Morison's equation modified to fit the TLP geometrical complexity. These predictions are compared with WAMIT numerical simulations and the experimental results. The structure's natural periods of vibration and damping coefficients are computed by fitting free-decay tests and by analyzing the motion spectral responses. The time-domain analysis provides estimates of extreme surge offset and maximum yaw angle. The low-frequency, wave-frequency and high-frequency components of the response signals are identified through the spectral density analysis of the platform's motions and tendon tensions.

Guichard, Aurelien

2001-01-01T23:59:59.000Z

440

Numerical Model for Conduction-Cooled Current Lead Heat Loads  

SciTech Connect

Current leads are utilized to deliver electrical power from a room temperature junction mounted on the vacuum vessel to a superconducting magnet located within the vacuum space of a cryostat. There are many types of current leads used at laboratories throughout the world; however, conduction-cooled current leads are often chosen for their simplicity and reliability. Conduction-cooled leads have the advantage of using common materials, have no superconducting/normal state transition, and have no boil-off vapor to collect. This paper presents a numerical model for conduction-cooled current lead heat loads. This model takes into account varying material and fluid thermal properties, varying thicknesses along the length of the lead, heat transfer in the circumferential and longitudinal directions, electrical power dissipation, and the effect of thermal intercepts. The model is validated by comparing the numerical model results to ideal cases where analytical equations are valid. In addition, the XFEL (X-Ray Free Electron Laser) prototype current leads are modeled and compared to the experimental results from testing at DESY's XFEL Magnet Test Stand (XMTS) and Cryomodule Test Bench (CMTB).

White, M.J.; Wang, X.L.; /Fermilab; Brueck, H.D.; /DESY

2011-06-10T23:59:59.000Z

Note: This page contains sample records for the topic "numerous naval propulsor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Thermal numerical simulator for laboratory evaluation of steamflood oil recovery  

Science Conference Proceedings (OSTI)

A thermal numerical simulator running on an IBM AT compatible personal computer is described. The simulator was designed to assist laboratory design and evaluation of steamflood oil recovery. An overview of the historical evolution of numerical thermal simulation, NIPER's approach to solving these problems with a desk top computer, the derivation of equations and a description of approaches used to solve these equations, and verification of the simulator using published data sets and sensitivity analysis are presented. The developed model is a three-phase, two-dimensional multicomponent simulator capable of being run in one or two dimensions. Mass transfer among the phases and components is dictated by pressure- and temperature-dependent vapor-liquid equilibria. Gravity and capillary pressure phenomena were included. Energy is transferred by conduction, convection, vaporization and condensation. The model employs a block centered grid system with a five-point discretization scheme. Both areal and vertical cross-sectional simulations are possible. A sequential solution technique is employed to solve the finite difference equations. The study clearly indicated the importance of heat loss, injected steam quality, and injection rate to the process. Dependence of overall recovery on oil volatility and viscosity is emphasized. The process is very sensitive to relative permeability values. Time-step sensitivity runs indicted that the current version is time-step sensitive and exhibits conditional stability. 75 refs., 19 figs., 19 tabs.

Sarathi, P.

1991-04-01T23:59:59.000Z

442

The Influence of Airborne Doppler Radar Data Quality on Numerical Simulations of a Tropical Cyclone  

Science Conference Proceedings (OSTI)

The impact of airborne Doppler radar data assimilation on improving numerical simulations of tropical cyclones (TCs) has been well recognized. However, the influence of radar data quality on the numerical simulation of tropical cyclones has not ...

Lei Zhang; Zhaoxia Pu; Wen-Chau Lee; Qingyun Zhao

2012-02-01T23:59:59.000Z

443

Effects of Numerics on the Physics in a Third-Generation Wind-Wave Model  

Science Conference Proceedings (OSTI)

Numerical errors in third-generation ocean wave models can result in a misinterpretation of the physics in the model. Using idealized situations, it is shown that numerical errors significantly influence the initial growth, the response of wave ...

Hendrik L. Tolman

1992-10-01T23:59:59.000Z

444

Numerical Approximations Can Create Chaos-related Errors in Blocking Forecasts  

Science Conference Proceedings (OSTI)

The chaotic structure of two-dimensional atmospheric flow is illustrated. It is shown that certain errors in numerical approximations can Prevent the correct prediction of chaotic processes. This is the case when the numerical approximations do ...

Juhani Rinne; Heikki Jrvinen

1992-05-01T23:59:59.000Z

445

A Numerical Predictability Problem in Solution of the Nonlinear Diffusion Equation  

Science Conference Proceedings (OSTI)

A numerical analysis of the nonlinear heat diffusion equation has been carted out to bring to light a heretofore little-understood type of instability that can be encountered in many numerical modeling applications. The nature of the instability ...

Philip S. Brown Jr.; Joseph P. Pandolfo

1982-09-01T23:59:59.000Z

446

Numerical Weather Prediction Studies from the FGGE Southern Hemisphere Data Base  

Science Conference Proceedings (OSTI)

The quality of numerical weather prediction available for the Southern Hemisphere from the FGGE data base has been examined. The Australian Numerical Meteorology Research Centre (ANMRC) spectral prediction model has been initialized with analyses ...

W. Bourke; K. Puri; R. Seaman

1982-12-01T23:59:59.000Z

447

Impact of Targeted Winter Storm Reconnaissance Dropwindsonde Data on Midlatitude Numerical Weather Predictions  

Science Conference Proceedings (OSTI)

The impact of assimilating data from the 2011 Winter Storm Reconnaissance (WSR) program on numerical weather forecasts was assessed. Parallel sets of analyses and deterministic 120-h numerical forecasts were generated using the ECMWF four-...

Thomas M. Hamill; Fanglin Yang; Carla Cardinali; Sharanya J. Majumdar

2013-06-01T23:59:59.000Z

448

Numerical Simulation of the Interaction between the Dryline and Horizontal Convective Rolls  

Science Conference Proceedings (OSTI)

The results of high-resolution simulations of an idealized dryline environment are discussed. The use of a single high-resolution domain, combined with accurate advection numerics and minimized numerical filtering, allows the explicit resolution ...

Steven E. Peckham; Robert B. Wilhelmson; Louis J. Wicker; Conrad L. Ziegler

2004-07-01T23:59:59.000Z

449

Numerical Study on Flow Pass of a Three-Dimensional Obstacle under a Strong Stratification Condition  

Science Conference Proceedings (OSTI)

A three-dimensional, nonhydrostatic, numerical turbulent model was used to study the flow pass of a three-dimensional obstacle under a strong stratification condition. The numerical results clarify the behavior of the flow at a low Froude number, ...

W. Sha; K. Nakabayashi; H. Ueda

1998-10-01T23:59:59.000Z

450

A Split Explicit Reformulation of the Regional Numerical Weather Prediction Model of the Japan Meteorological Agency  

Science Conference Proceedings (OSTI)

The split explicit integration scheme for numerical weather prediction models is employed in a version of the regional numerical weather prediction model of the Japan Meteorological Agency. The finite-difference scheme of the model is designed in ...

Dean G. Duffy

1981-05-01T23:59:59.000Z

451

An Assessment of Marine Surface Winds from the Australian Bureau of Meteorology Numerical Weather Prediction Systems  

Science Conference Proceedings (OSTI)

A method for routinely verifying numerical weather prediction surface marine winds with satellite scatterometer winds is introduced. The marine surface winds from the Australian Bureau of Meteorologys operational global and regional numerical ...

Eric W. Schulz; Jeffrey D. Kepert; Diana J. M. Greenslade

2007-06-01T23:59:59.000Z

452

Numerical and Analytical Estimates of M2 Tidal Conversion at Steep Oceanic Ridges  

Science Conference Proceedings (OSTI)

Numerical calculations of the rate at which energy is converted from the external to internal tides at steep oceanic ridges are compared with estimates from analytic theories. The numerical calculations are performed using a hydrostatic primitive ...

Emanuele Di Lorenzo; William R. Young; Stefan Llewellyn Smith

2006-06-01T23:59:59.000Z

453

A Numerical Study of the Role of Humidity in the Updraft Driven by Moist Slantwise Convection  

Science Conference Proceedings (OSTI)

A hydrostatic numerical model with simple microphysical parameterization is used to simulate moist slantwise convection (MSC) in an archetypal initial condition free of other kinds of instability. The numerical experiments are designed to explore ...

Valdir Innocentini; Ernesto Dos Santos Caetano Neto

1992-07-01T23:59:59.000Z

454

The Numerical Representation of Entrainment in Parameterizations of Boundary Layer Turbulent Mixing  

Science Conference Proceedings (OSTI)

Problems have been identified with parameterizations of convective boundary layers, in particular with their numerical treatment of the capping inversion. It is shown that the turbulence scheme can combine with the numerical representation of ...

A. P. Lock

2001-05-01T23:59:59.000Z

455

Quantum Calisthenics: Gaussians, The Path Integral and Guided Numerical Approximations  

SciTech Connect

It is apparent to anyone who thinks about it that, to a large degree, the basic concepts of Newtonian physics are quite intuitive, but quantum mechanics is not. My purpose in this talk is to introduce you to a new, much more intuitive way to understand how quantum mechanics works. I begin with an incredibly easy way to derive the time evolution of a Gaussian wave-packet for the case free and harmonic motion without any need to know the eigenstates of the Hamiltonian. This discussion is completely analytic and I will later use it to relate the solution for the behavior of the Gaussian packet to the Feynman path-integral and stationary phase approximation. It will be clear that using the information about the evolution of the Gaussian in this way goes far beyond what the stationary phase approximation tells us. Next, I introduce the concept of the bucket brigade approach to dealing with problems that cannot be handled totally analytically. This approach combines the intuition obtained in the initial discussion, as well as the intuition obtained from the path-integral, with simple numerical tools. My goal is to show that, for any specific process, there is a simple Hilbert space interpretation of the stationary phase approximation. I will then argue that, from the point of view of numerical approximations, the trajectory obtained from my generalization of the stationary phase approximation specifies that subspace of the full Hilbert space that is needed to compute the time evolution of the particular state under the full Hamiltonian. The prescription I will give is totally non-perturbative and we will see, by the grace of Maple animations computed for the case of the anharmonic oscillator Hamiltonian, that this approach allows surprisingly accurate computations to be performed with very little work. I think of this approach to the path-integral as defining what I call a guided numerical approximation scheme. After the discussion of the anharmonic oscillator I will turn to tunneling problems and show that the instanton can also be though of in the same way. I will do this for the classic problem of a double well potential in the extreme limit when the splitting between the two lowest levels is extremely small and the tunneling rate from one well to another is also very small.

Weinstein, Marvin; /SLAC

2009-02-12T23:59:59.000Z

456

Adaptive higher order numerical simulation of heat and mass transfer in fluidized beds  

E-Print Network (OSTI)

Adaptive higher order numerical simulation of heat and mass transfer in fluidized beds Ch. Nagaiah1 adaptive numerical results of heat and mass transfer in fluidized beds using higher order time stepping injection. The numerical results are tested with different time stepping methods for different spatial grid

Magdeburg, Universität

457

Numerical Investigation of Heat Transfer to Fully Developed Turbulent Air Flow in a Concentric Pipe  

Science Conference Proceedings (OSTI)

Numerical simulation using standard k-e turbulencemodel was developed to investigate numerically thecharacteristic of backward-facing step flow in a concentricpipe. This research is focused on the surface temperature, localheat transfer coefficient and ... Keywords: Numerical Simulation, Heat Transfer, Turbulent Flow, Computational Fluid Dynamics, Backward Facing Step

Cheen Sean Oon, Ahmad Badarudin, Salim Newaz Kazi, Arif Syazwan

2013-09-01T23:59:59.000Z

458

Coupling geological and numerical models to simulate groundwater flow and contaminant transport in fractured media  

Science Conference Proceedings (OSTI)

A new modeling approach is presented to improve numerical simulations of groundwater flow and contaminant transport in fractured geological media. The approach couples geological and numerical models through an intermediate mesh generation phase. As ... Keywords: Fractures, Geomodel, Influence coefficient technique, Numerical modeling, Tetrahedra

Daniela Blessent; Ren Therrien; Kerry MacQuarrie

2009-09-01T23:59:59.000Z

459

Numerical Modeling of Transient Basin and Range Extensional Geothermal  

Open Energy Info (EERE)

Transient Basin and Range Extensional Geothermal Transient Basin and Range Extensional Geothermal Systems Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Numerical Modeling of Transient Basin and Range Extensional Geothermal Systems Abstract A suite of models utilizing a range of bulkrock permeabilities were developed to analyze thetransient behavior of basin and range extensionalgeothermal systems, and particularly, the evolution ofthe system temperature with time. Each modelconsists of two mountain ranges (~1 km relief fromthe valley floor) separated by a thick sequence (about4 km) of clastic sediments derived from the adjacentranges, and a relatively permeable, high angle faultthat functions as a conduit for subsurface fluids. Thisgeometry is typical of Basin and Range extensionalsystems.We

460

Numerical Modeling At Coso Geothermal Area (1999) | Open Energy Information  

Open Energy Info (EERE)

9) 9) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Numerical Modeling Activity Date 1999 Usefulness not indicated DOE-funding Unknown Exploration Basis To determine three-dimensional P and S waves velocity structures Notes High precision P and S wave travel times for 2104 microearthquakes with focus <6 km are used in a non-linear inversion to derive high-resolution 3-D compressional and shear velocity structures at the Coso Geothermal Area. Block size for the inversion is 0.2 km horizontally and 0.5 km vertically and inversions are investigated in the upper 5 km of the geothermal area. Spatial resolution, calculated by synthetic modeling of a cross model at critical locations, is estimated to be 0.35 km for Vp and 0.5 km for V s . In the 2 km southwest Sugarloaf region, we found low V p

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While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Accurate Numerical Simulations Of Chemical Phenomena Involved in Energy  

NLE Websites -- All DOE Office Websites (Extended Search)

Visualization of the spin density from the excess electron cluster. Robert Visualization of the spin density from the excess electron cluster. Robert Harrison Accurate Numerical Simulations Of Chemical Phenomena Involved in Energy Production and Storage with MADNESS and MPQC PI Name: Robert Harrison PI Email: harrisonrj@ornl.gov Institution: ORNL Allocation Program: ESP Allocation Hours at ALCF: 150 Million Year: 2010 to 2013 Research Domain: Chemistry Researchers propose to focus on the problems of catalysis and heavy element chemistry for fuel reprocessing-both of which are of immediate interest to the Department of Energy (DOE), are representative of a very broad class of problems in chemistry, and demand the enormous computational resources anticipated from the next generation of leadership computing facilities. Also common to both is the need for accurate electronic structure

462

Integrated Numerical Modeling Process for Evaluating Automobile Climate Control Systems  

NLE Websites -- All DOE Office Websites (Extended Search)

FCC-70 FCC-70 Integrated Numerical Modeling Process for Evaluating Automobile Climate Control Systems John Rugh National Renewable Energy Laboratory Copyright © 2002 Society of Automotive Engineers, Inc. ABSTRACT The air-conditioning (A/C) system compressor load can significantly impact the fuel economy and tailpipe emissions of conventional and hybrid electric automobiles. With the increasing emphasis on fuel economy, it is clear that the A/C compressor load needs to be reduced. In order to accomplish this goal, more efficient climate control delivery systems and reduced peak soak temperatures will be necessary to reduce the impact of vehicle A/C systems on fuel economy and tailpipe emissions. Good analytical techniques are important in identifying promising concepts. The goal at

463

Numerical Modeling of the Nucleation Conditions of Petal-Centerline  

Open Energy Info (EERE)

the Nucleation Conditions of Petal-Centerline the Nucleation Conditions of Petal-Centerline Fractures below a Borehole Floor, A Sensitivity Study and Application to the Coso Geothermal Field Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Numerical Modeling of the Nucleation Conditions of Petal-Centerline Fractures below a Borehole Floor, A Sensitivity Study and Application to the Coso Geothermal Field Details Activities (1) Areas (1) Regions (0) Abstract: A boundary element model using Poly3D© has been developed to investigate the conditions in which the stress concentration below the floor of a borehole can cause tensile stress necessary to nucleate petal-centerline fractures. The remote stress state, borehole geometry, and traction boundary conditions on the borehole surface are taken from direct

464

Los Alamos National Laboratory communicators capture numerous awards from  

NLE Websites -- All DOE Office Websites (Extended Search)

Society for Technical Communication Awards Society for Technical Communication Awards Los Alamos National Laboratory communicators capture numerous awards from Society for Technical Communication Three Los Alamos entries garnered Distinguished Technical Communication awards, the competition's highest award category. April 15, 2010 Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new materials. Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy

465

Rational Construction of Stochastic Numerical Methods for Molecular Sampling  

E-Print Network (OSTI)

In this article, we focus on the sampling of the configurational Gibbs-Boltzmann distribution, that is, the calculation of averages of functions of the position coordinates of a molecular $N$-body system modelled at constant temperature. We show how a formal series expansion of the invariant measure of a Langevin dynamics numerical method can be obtained in a straightforward way using the Baker-Campbell-Hausdorff lemma. We then compare Langevin dynamics integrators in terms of their invariant distributions and demonstrate a superconvergence property (4th order accuracy where only 2nd order would be expected) of one method in the high friction limit; this method, moreover, can be reduced to a simple modification of the Euler-Maruyama method for Brownian dynamics involving a non-Markovian (coloured noise) random process. In the Brownian dynamics case, 2nd order accuracy of the invariant density is achieved. All methods considered are efficient for molecular applications (requiring one force evaluation per times...

Leimkuhler, Benedict

2012-01-01T23:59:59.000Z

466

Numerical tests of dynamical friction in gravitational inhomogeneous systems  

E-Print Network (OSTI)

In this paper, I test by numerical simulations the results of Del Popolo & Gambera (1998),dealing with the extension of Chandrasekhar and von Neumann's analysis of the statistics of the gravitational field to systems in which particles (e.g., stars, galaxies) are inhomogeneously distributed. The paper is an extension of that of Ahmad & Cohen (1974), in which the authors tested some results of the stochastic theory of dynamical friction developed by Chandrasekhar & von Neumann (1943) in the case of homogeneous gravitational systems. It is also a continuation of the work developed in Del Popolo (1996a,b), which extended the results of Ahmad & Cohen (1973), (dealing with the study of the probability distribution of the stochastic force in homogeneous gravitational systems) to inhomogeneous gravitational systems. Similarly to what was done by Ahmad & Cohen (1974) in the case of homogeneous systems, I test, by means of the evolution of an inhomogeneous system of particles, that the theoretical ...

Popolo, A D

2003-01-01T23:59:59.000Z

467

Using curvature invariants for wave extraction in numerical relativity  

E-Print Network (OSTI)

We present a new expression for the Weyl scalar Psi_4 that can be used in numerical relativity to extract the gravitational wave content of a spacetime. The formula relies upon the identification of transverse tetrads, namely the ones in which Psi_1=Psi_3=0. It is well known that tetrads with this property always exist in a general Petrov type I spacetime. A sub-class of these tetrads naturally converges to the Kinnersley tetrad in the limit of Petrov type D spacetime. However, the transverse condition fixes only four of the six parameters coming from the Lorentz group of transformations applied to tetrads. Here we fix the tetrad completely, in particular by giving the expression for the spin-boost transformation that was still unclear. The value of Psi_4 in this optimal tetrad is given as a function of the two curvature invariants I and J.

Andrea Nerozzi; Oliver Elbracht

2008-11-10T23:59:59.000Z

468

Direct Numerical Simulation Of Solidification Microstructures Affected By Fluid Flow  

E-Print Network (OSTI)

The effects of fluid flow on the solidification morphology of pure materials and solute microsegregation patterns of binary alloys are studied using a computational methodology based on a front tracking/finite difference method. A general single-field formulation is presented for the full coupling of phase change, fluid flow, heat and solute transport. This formulation accounts for interfacial rejection/absorption of latent heat and solute, interfacial anisotropies, discontinuities in material properties between the liquid and solid phases, shrinkage/expansion upon solidification and motion and deformation of the solid. Numerical results are presented for the two-dimensional dendritic solidification of pure succinonitrile and the solidification of globulitic grains of a Plutonium-Gallium alloy. For both problems, comparisons are made between solidification without fluid flow and solidification within a shear flow. Introduction Nearly all materials of engineering interest have, at som...

Damir Juric

1998-01-01T23:59:59.000Z

469

Progress report on LBL's numerical modeling studies on Cerro Prieto  

DOE Green Energy (OSTI)

An exploitation model of the Cerro Prieto geothermal system is needed to assess the energy capacity of the field, estimate its productive lifetime and develop an optimal reservoir management plan. The model must consider the natural state (i.e., pre-exploitation) conditions of the system and be able to predict changes in the reservoir thermodynamic conditions (and fluid chemistry) in response to fluid production (and injection). This paper discusses the results of a three-dimensional numerical simulation of the natural state conditions of the Cerro Prieto field and compares computed and observed pressure and temperature/enthalpy changes for the 1973--1987 production period. 16 refs., 24 figs., 2 tabs.

Halfman-Dooley, S.E.; Lippman, M.J.; Bodvarsson, G.S.

1989-04-01T23:59:59.000Z

470

Numerical simulation and immersive visualization of hairpin vortices.  

SciTech Connect

To better understand the vortex dynamics of coherent structures in turbulent and transitional boundary layers, we consider direct numerical simulation of the interaction between a flat-plate-boundary-layer flow and an isolated hemispherical roughness element. Of principal interest is the evolution of hairpin vortices that form an interlacing pattern in the wake of the hemisphere, lift away from the wall, and are stretched by the shearing action of the boundary layer. Using animations of unsteady three-dimensional representations of this flow, produced by the vtk toolkit and enhanced to operate in a CAVE virtual environment, we identify and study several key features in the evolution of this complex vortex topology not previously observed in other visualization formats.

Tufo, H.M.; Fischer, P.F.; Papka, M.E.; Blom, K.

1999-08-28T23:59:59.000Z

471

Trapped Ion Imaging with a High Numerical Aperture Spherical Mirror  

E-Print Network (OSTI)

Efficient collection and analysis of trapped ion qubit fluorescence is essential for robust qubit state detection in trapped ion quantum computing schemes. We discuss simple techniques of improving photon collection efficiency using high numerical aperture (N.A.) reflective optics. To test these techniques we placed a spherical mirror with an effective N.A. of about 0.9 inside a vacuum chamber in the vicinity of a linear Paul trap. We demonstrate stable and reliable trapping of single barium ions, in excellent agreement with our simulations of the electric field in this setup. While a large N.A. spherical mirror introduces significant spherical aberration, the ion image quality can be greatly improved by a specially designed aspheric corrector lens located outside the vacuum system. Our simulations show that the spherical mirror/corrector design is an easy and cost-effective way to achieve high photon collection rates when compared to a more sophisticated parabolic mirror setup.

G Shu; M R Dietrich; N Kurz; B B Blinov

2009-01-29T23:59:59.000Z

472

Trapped Ion Imaging with a High Numerical Aperture Spherical Mirror  

E-Print Network (OSTI)

Efficient collection and analysis of trapped ion qubit fluorescence is essential for robust qubit state detection in trapped ion quantum computing schemes. We discuss simple techniques of improving photon collection efficiency using high numerical aperture (N.A.) reflective optics. To test these techniques we placed a spherical mirror with an effective N.A. of about 0.9 inside a vacuum chamber in the vicinity of a linear Paul trap. We demonstrate stable and reliable trapping of single barium ions, in excellent agreement with our simulations of the electric field in this setup. While a large N.A. spherical mirror introduces significant spherical aberration, the ion image quality can be greatly improved by a specially designed aspheric corrector lens located outside the vacuum system. Our simulations show that the spherical mirror/corrector design is an easy and cost-effective way to achieve high photon collection rates when compared to a more sophisticated parabolic mirror setup.

Shu, G; Kurz, N; Blinov, B B

2009-01-01T23:59:59.000Z

473

Nondestructive Testing of Overhead Transmission Lines: Numerical and Experimental Investigation  

E-Print Network (OSTI)

Overhead transmission lines are periodically inspected using both on-ground and helicopter-aided visual inspection. Factors including sun glare, cloud cover, close proximity to power lines and the rapidly changing visual circumstances make airborne inspection of power lines a particularly hazardous task. In this research, a finite element model is developed that can be used to create the theoretical dispersion curves of an overhead transmission line. The complex geometry of the overhead transmission line is the primary reason for absence of a theoretical solution to get the analytical dispersion curves. The numerical results are then verified with experimental tests using a non-contact and broadband laser detection technique. The methodology developed in this study can be further extended to a continuous monitoring system and be applied to other cable monitoring applications, such as bridge cable monitoring, which would otherwise put human inspectors at risk.

Kulkarni, Salil Subhash

2009-12-01T23:59:59.000Z

474

Numerical evaluation of effective unsaturated hydraulic properties for fractured rocks  

Science Conference Proceedings (OSTI)

To represent a heterogeneous unsaturated fractured rock by its homogeneous equivalent, Monte Carlo simulations are used to obtain upscaled (effective) flow properties. In this study, we present a numerical procedure for upscaling the van Genuchten parameters of unsaturated fractured rocks by conducting Monte Carlo simulations of the unsaturated flow in a domain under gravity-dominated regime. The simulation domain can be chosen as the scale of block size in the field-scale modeling. The effective conductivity is computed from the steady-state flux at the lower boundary and plotted as a function of the averaging pressure head or saturation over the domain. The scatter plot is then fitted using van Genuchten model and three parameters, i.e., the saturated conductivity K{sub s}, the air-entry parameter {alpha}, the pore-size distribution parameter n, corresponding to this model are considered as the effective K{sub s}, effective {alpha}, and effective n, respectively.

Lu, Zhiming [Los Alamos National Laboratory; Kwicklis, Edward M [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

475

Numerical modeling of a true in situ oil shale retort  

DOE Green Energy (OSTI)

A numerical model has been developed to simulate the true in situ retorting process. The retort is assumed to be a low-porosity fractured bed composed of large seams of competent shale separated at intervals by open fractures. Kerogen and carbonate decomposition and char, oil, and gas combustion, as well as other reactions, are considered. In contrast to the results of rubbled-bed models, the retorting of seams thicker than one meter is characterized by incomplete retorting and significant oil combustion (10 to 40% of that retorted). The amount of shale retorted can, however, be maximized by proper control of air and steam injection rates, with the injected gas being optimally 40 to 50% steam. The oil available for recovery from a two meter seam can then be, for example, as high as 50% of Fischer Assay.

Tyner, C.E.; Hommert, P.J.

1979-01-01T23:59:59.000Z

476

Numerical analysis of vapor flow in a micro heat pipe  

E-Print Network (OSTI)

The vapor flow in a flat plate micro heat pipe with both uniform and linear heat flux boundary conditions has been numerically analyzed. For both types of boundary conditions, the Navier-Stokes equations with steady incompressible two-dimensional flow were solved using the SIMPLE method. The results indicate that the pressure, shear stress, and friction factor under linear heat flux boundary conditions are considerably smoother, and hence, more closely approximate the real situation. As the heat flux increases, the pressure drop increases, but the friction factor demonstrates only a slight change for different heat flux conditions. The size and shape of the micro heat pipe vapor space was shown to have a significant influence on the vapor flow behavior for micro heat pipes. When the vapor space area decreases, the pressure drop, shear stress, and friction factor all significantly increase.

Liu, Xiaoqin

1996-01-01T23:59:59.000Z

477

Numerical simulation of laminar reacting flows with complex chemistry  

SciTech Connect

We present an adaptive algorithm for low Mach number reacting flows with complex chemistry. Our approach uses a form of the low Mach number equations that discretely conserves both mass and energy. The discretization methodology is based on a robust projection formulation that accommodates large density contrasts. The algorithm uses an operator-split treatment of stiff reaction terms and includes effects of differential diffusion. The basic computational approach is embedded in an adaptive projection framework that uses structured hierarchical grids with subcycling in time that preserves the discrete conservation properties of the underlying single-grid algorithm. We present numerical examples illustrating the performance of the method on both premixed and non-premixed flames.

Day, Marcus S.; Bell, John B.

1999-12-01T23:59:59.000Z

478

Three dimensional numerical simulations of the UPS-292-SC engine  

DOE Green Energy (OSTI)

We present and analyze three-dimensional calculations of the spray, mixing and combustion in the UPS-292 stratified charge engine for three different operating conditions, corresponding to overall air-fuel ratios between 22.4 and 61.0. The numerical calculations are performed with KIVA, a multidimensional arbitrary-mesh, finite-difference hydrodynamics program for internal combustion engine applications. The calculations use a mesh of 10,000 computational cells, which conform to the shape of the piston bowl and cylinder and move to follow piston motion. Each operating condition is calculated from intake valve closure at 118/sup 0/ BTDC to 90/sup 0/ ATDC and requires approximately three hours of CRAY-XMP computer time.

O'Rourke, P.J.; Amsden, A.A.

1987-01-01T23:59:59.000Z

479

Integrating Numerical Computation into the Modeling Instruction Curriculum  

E-Print Network (OSTI)

We describe a way to introduce physics high school students with no background in programming to computational problem-solving experiences. Our approach builds on the great strides made by the Modeling Instruction reform curriculum. This approach emphasizes the practices of "Developing and using models" and "Computational thinking" highlighted by the NRC K-12 science standards framework. We taught 9th-grade students in a Modeling-Instruction-based physics course to construct computational models using the VPython programming environment. Numerical computation within the Modeling Instruction curriculum provides coherence among the curriculum's different force and motion models, links the various representations which the curriculum employs, and extends the curriculum to include real-world problems that are inaccessible to a purely analytic approach.

Caballero, Marcos D; Aiken, John M; Douglas, Scott S; Scanlon, Erin M; Thoms, Brian; Schatz, Michael F

2012-01-01T23:59:59.000Z

480

A numerical model simulation of longshore transport for Galveston Island  

E-Print Network (OSTI)

The shoreline changes, deposition patterns, and longshore transport rates were calculated for the coast of Galveston Island using a numerical model simulation. The model only simulated changes due to waves creating longshore currents. East Beach showed a net accretion pattern, with erosion confined to the eastern section of the area. Large accretion was found near the first groin indicating transport from east to west. The groin field fluctuated with erosion and accretion, with a net gain of shoreline. The unprotected beach in front of the seawall eroded almost completely away. West Beach had a net loss of shoreline overall. This was largely due to the shoreline erosion found at San Luis Pass. The majority of West Beach was frequently unstable, fluctuating between erosion and accretion.

Gilbreath, Stephen Alexander

1995-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "numerous naval propulsor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Analytical and Numerical Investigation of Ant Behavior Under Crowded Conditions  

E-Print Network (OSTI)

Swarm intelligence is widely recognized as a powerful paradigm of self-organized optimization, with numerous examples of successful applications in distributed artificial intelligence. However, the role of physical interactions in the organization of traffic flows in ants under crowded conditions has only been studied very recently. The related results suggest new ways of congestion control and simple algorithms for optimal resource usage based on local interactions and, therefore, decentralized control concepts. Here, we present a mathematical analysis of such a concept for an experiment with two alternative ways with limited capacities between a food source and the nest of an ant colony. Moreover, we carry out microscopic computer simulations for generalized setups, in which ants have more alternatives or the alternative ways are of different lengths. In this way and by variation of interaction parameters, we can get a better idea, how powerful congestion control based on local repulsive interactions may be...

Peters, Karsten; Dussutour, Audrey; Helbing, Dirk

2008-01-01T23:59:59.000Z

482

Simple numerical simulation for liquid dominated geothermal reservoir  

SciTech Connect

A numerical model for geothermal reservoir has been developed. The model used is based on an idealized, two-dimensional case, where the porous medium is isotropic, nonhomogeneous, filled with saturated liquid. The fluids are assumed to have constant and temperature dependent viscosity. A Boussinesq approximation and Darcys law are used. The model will utilize a simple hypothetical geothermal system, i.e. graben within horsts structure, with three layers of different permeabilities. Vorticity plays an importance roles in the natural convection process, and its generation and development do not depend only on the buoyancy, but also on the magnitude and direction relation between the flow velocity and the local gradient of permeability to viscosity ratio. This model is currently used together with a physical, scaled-down reservoir model to help conceptual modeling.

Wintolo, Djoko; Sutrisno; Sudjatmiko; Sudarman, S.

1996-01-24T23:59:59.000Z

483

Numerical Model of a Tensioner System and Flex Joint  

E-Print Network (OSTI)

Top Tensioned Riser (TTR) and Steel Catenary Riser (SCR) are often used in a floating oil/gas production system deployed in deep water for oil transport. This study focuses on the improvements to the existing numerical code, known as CABLE3D, to allow for static and dynamic simulation of a TTR connected to a floating structure through a tensioner system or buoyancy can, and a SCR connected to a floating structure through a flex joint. A tensioner system usually consists of three to four cylindrical tensioners. Although the stiffness of individual tensioner is assumed to be linear, the resultant stiffness of a tensioner system may be nonlinear. The vertical friction at a riser guide is neglected assuming a roller is installed there. Near the water surface, a TTR is forced to move due to the motion of the upper deck of a floating structure as well as related riser guides. Using the up-dated CABLE3D, the dynamic simulation of TTRs will be made to reveal their motion, tension, and bending moment, which is important for the design. A flex joint is approximated by a rotational spring with linear stiffness, which is used as a connection between a SCR and a floating structure or a connection between a TTR and the sea floor. The improved CABLE3D will be integrated into a numerical code, known as COUPLE, for the simulation of the dynamic interaction among the hull of a floating structure, such as SPAR or TLP, its mooring system and riser system under the impact of wind, current and waves. To demonstrate the application of the improved CABLE3D and its integration with COUPLE, the related simulation is made for Constitution SPAR under the met-ocean conditions of hurricane Ike. The mooring system of the Spar consists of nine mooring lines and the riser system consists of six TTRs and two SCRs.

Huang, Han

2013-08-01T23:59:59.000Z

484

Numerical modeling and experimental testing of a solar grill  

SciTech Connect

The sun provides a free, nonpolluting and everlasting source of energy. Considerable research has been carried out to utilize solar energy for purposes such as water heating, high temperature ovens, and conversion to electrical energy. One of the interesting forms for utilizing solar energy is cooking. The main disadvantage of solar energy systems has been the low efficiency attained in most of its practical applications. It is expected, however, that due to continuing decreases in the availability of other energy sources such as oil and coal, along with the safety problems associated with nuclear energy, man's need for utilization of solar energy will increase, thus leading him to find the ways and means to develop adequate and efficient solar-powered systems. In camps, where tents are used to accommodate people, cooking is done via conventional gas stoves. This usually takes place in extremely crowded areas which become highly fireprone. Solar oven cookers seem to be a viable alternative considering both economy and safety. Among the various forms of solar cookers, the oven-type solar cooker is known to be the best in terms of efficiency. One of the most practical and efficient forms of solar oven cookers is the outdoor portable solar grill (Bar-B-Q), developed by Khalifa et al. The solar grill is a light and portable unit that utilizes solar energy to grill meat. One of the best types of grilling with this cooker is the well-known Shish Kebab or Bar-B-Q. A detailed description for the design of the solar grill is provided as follows. This paper is aimed at providing experimental results and formulating a numerical model for the solar grill. Results of the two approaches are then compared to verify the validity of the numerical simulation. An experimental and theoretical investigation was conducted on the solar grill in order to study the factors that affect its design and performance.

Olwi, I.; Khalifa, A. (King Abdulaziz Univ., Jeddah (Saudi Arabia))

1993-02-01T23:59:59.000Z

485

Numerical Investigations On The Seismic Behaviour Of Confined Masonry Walls  

SciTech Connect

In the last century, severe earthquakes highlighted the seismic vulnerability of unreinforced masonry buildings. Many technological innovations have been introduced in time in order to improve resistance, ductility, and dissipation properties of this type of constructions. The most widely diffused are reinforced masonry and confined masonry. Damage observation of recent earthquakes demonstrated the effectiveness of the response of confined masonry structures to seismic actions. In general, in this type of structures, reinforced concrete beams and columns are not main structural elements, however, they have the following functions: to confine masonry in order to increase its ductility; to bear tensile stresses derived from bending; to contrast the out-of-plane overturning of masonry panels. It is well evident that these functions are as much effectively performed as the connection between masonry and reinforced concrete elements is good (for example by mean of local interlocking or reinforcements). Confined masonry structures have been extensively studied in the last decades both from a theoretical point of view and by experimental tests Aims of this paper is to give a contribution to the understanding of the seismic behaviour of confined masonry walls by means of numerical parametrical analyses. There latter are performed by mean of the finite element method; a nonlinear anisotropic constitutive law recently developed for masonry is adopted. Comparison with available experimental results are carried out in order to validate the results. A comparison between the resistance obtained from the numerical analyses and the prevision provided by simplified resistance criteria proposed in literature and in codes is finally provided.

Calderini, Chiara; Cattari, Serena; Lagomarsino, Sergio [University of Genoa, Department of Civil, Environmental and Architectural Engineering (Italy)

2008-07-08T23:59:59.000Z

486

NUMERICAL STUDY OF THE VISHNIAC INSTABILITY IN SUPERNOVA REMNANTS  

Science Conference Proceedings (OSTI)

The Vishniac instability is thought to explain the complex structure of radiative supernova remnants in their Pressure-Driven Thin Shell (PDTS) phase after a blast wave (BW) has propagated from a central explosion. In this paper, the propagation of the BW and the evolution of the PDTS stage are studied numerically with the two-dimensional (2D) code HYDRO-MUSCL for a finite-thickness shell expanding in the interstellar medium (ISM). Special attention is paid to the adiabatic index, {gamma}, and three distinct values are taken for the cavity ({gamma}{sub 1}), the shell ({gamma}{sub 2}), and the ISM ({gamma}{sub 3}) with the condition {gamma}{sub 2} < {gamma}{sub 1}, {gamma}{sub 3}. This low value of {gamma}{sub 2} accounts for the high density in the shell achieved by a strong radiative cooling. Once the spherical background flow is obtained, the evolution of a 2D-axisymmetric perturbation is computed from the linear to the nonlinear regime. The overstable mechanism, previously demonstrated theoretically by E. T. Vishniac in 1983, is recovered numerically in the linear stage and is expected to produce and enhance anisotropies and clumps on the shock front, leading to the disruption of the shell in the nonlinear phase. The period of the increasing oscillations and the growth rate of the instability are derived from several points of view (the position of the perturbed shock front, mass fluxes along the shell, and density maps), and the most unstable mode differing from the value given by Vishniac is computed. In addition, the influence of several parameters (the Mach number, amplitude and wavelength of the perturbation, and adiabatic index) is examined and for wavelengths that are large enough compared to the shell thickness, the same conclusion arises: in the late stage of the evolution of the radiative supernova remnant, the instability is dampened and the angular initial deformation of the shock front is smoothed while the mass density becomes uniform with the angle. As a result, our model shows that the supernova remnant returns to a stable evolution and the Vishniac instability does not lead to the fragmentation of the shock as predicted by the theory.

Michaut, C.; Cavet, C.; Bouquet, S. E.; Roy, F.; Nguyen, H. C., E-mail: claire.michaut@obspm.fr [LUTH, Observatoire de Paris, CNRS, Universite Paris-Diderot, F-92190 Meudon (France)

2012-11-10T23:59:59.000Z

487

Numerical codes for MHD flows. Quarterly technical progress report  

DOE Green Energy (OSTI)

The objective of this work is to develop numerical techniques and codes for characterizing coal-combustion-operated MHD generators and diffusers. The purpose for this activity is twofold: (a) provide the MHD Division of the Department of Energy with evaluative guidelines in selecting and exercising channel codes; (b) provide users with codes to design MHD channel/diffusers and evaluate their performance. The scope of work calls for four tasks: 1) unsteady one-dimensional channel code: to modify an existing time-dependent code to include MHD effects for approximate predictions of the flow from the combustion chamber through the diffuser; 2) multidimensional channel codes: to develop codes for predicting the complete inviscid-viscous flow across the duct in an MHD generator and diffuser; 3) slag layer studies and heat transfer analyses: to adapt an existing code to predict the stability conditions of slag layers which are driven by turbulent exterior flows and to develop a code for predicting slag layer growth; and 4) arc formation, migration, and electrode erosion: to conduct transient analyses in evaluating the inter-electrode arcing and constricted discharges from th gas to the electrode in the presence of Hall current. A summary of the current progress on these tasks is presented.

Blottner, F.G.; Russo, A.J.; Taylor, J.G.; Hadley, G.R.

1979-02-01T23:59:59.000Z

488

Numerical tests of dynamical friction in gravitational inhomogeneous systems  

E-Print Network (OSTI)

In this paper, I test by numerical simulations the results of Del Popolo & Gambera (1998),dealing with the extension of Chandrasekhar and von Neumann's analysis of the statistics of the gravitational field to systems in which particles (e.g., stars, galaxies) are inhomogeneously distributed. The paper is an extension of that of Ahmad & Cohen (1974), in which the authors tested some results of the stochastic theory of dynamical friction developed by Chandrasekhar & von Neumann (1943) in the case of homogeneous gravitational systems. It is also a continuation of the work developed in Del Popolo (1996a,b), which extended the results of Ahmad & Cohen (1973), (dealing with the study of the probability distribution of the stochastic force in homogeneous gravitational systems) to inhomogeneous gravitational systems. Similarly to what was done by Ahmad & Cohen (1974) in the case of homogeneous systems, I test, by means of the evolution of an inhomogeneous system of particles, that the theoretical rate of force fluctuation d F/dt describes correctly the experimental one, I find that the stochastic force distribution obtained for the evolved system is in good agreement with the Del Popolo & Gambera (1998) theory. Moreover, in an inhomogeneous background the friction force is actually enhanced relative to the homogeneous case.

A. Del Popolo

2003-05-05T23:59:59.000Z

489

Numerical modeling of the wind flow over a transverse dune  

E-Print Network (OSTI)

Transverse dunes, which form under unidirectional winds and have fixed profile in the direction perpendicular to the wind, occur on all celestial objects of our solar system where dunes have been detected. Here we perform a numerical study of the average turbulent wind flow over a transverse dune by means of computational fluid dynamics simulations. We find that the length of the zone of recirculating flow at the dune lee --- the {\\em{separation bubble}} --- displays a surprisingly strong dependence on the wind shear velocity, $u_{\\ast}$: it is nearly independent of $u_{\\ast}$ for shear velocities within the range between $0.2\\,$m$$s and $0.8\\,$m$$s but increases linearly with $u_{\\ast}$ for larger shear velocities. Our calculations show that transport in the direction opposite to dune migration within the separation bubble can be sustained if $u_{\\ast}$ is larger than approximately $0.39\\,$m$$s, whereas a larger value of $u_{\\ast}$ (about $0.49\\,$m$$s) is required to initiate this reverse transport.

Ascnio D. Arajo; Eric J. R. Parteli; Thorsten Poeschel; Jos S. Andrade Jr.; Hans J. Herrmann

2013-07-26T23:59:59.000Z

490

Numerical Analysis Of Three Component Induction Logging In Geothermal Reservoirs  

DOE Green Energy (OSTI)

This project is supporting the development of the ''Geo-Bilt'', geothermal electromagnetic-induction logging tool that is being built by ElectroManetic Instruments, Inc. The tool consists of three mutually orthogonal magnetic field antennas, and three-component magnetic field receivers located at different distances from the source. In its current configuration, the source that has a moment aligned along the borehole axis consists of a 1m long solenoid, while the two trans-axial sources consist of 1m by 8cm loops of wire. The receivers are located 2m and 5m away from the center of the sources, and five frequencies from 2 kHz to 40 kHz are being employed. This study is numerically investigating (1) the effect of the borehole on the measurements, and (2) the sensitivity of the tool to fracture zone-geometries that might be encountered in a geothermal field. The benefits of the results are that they will lead to a better understanding of the data that the tool produces during its testing phase and an idea of what the limitations of the tool are.

Dr. David L. Alumbaugh

2002-01-09T23:59:59.000Z

491

Numerical Prediction of Springback Shape of Severely Bent Sheet Metal  

Science Conference Proceedings (OSTI)

In the sheet metal forming simulation, the shell element widely used is assumed as a plane stress state based on the Mindlin-Reissner theory. Numerical prediction with the conventional shell element is not accurate when the bending radius is small compared to the sheet thickness. The main reason is because the strain and stress formulation of the conventional shell element does not fit the actual phenomenon. In order to predict precisely the springback of a bent sheet with a severe bend, a measurement method for through-thickness strain has been proposed. The strain was formulated based on measurement results and calculation results from solid element. Through-thickness stress distribution was formulated based on the equilibrium. The proposed shell element based on the formulations was newly introduced into the FEM code. The accuracy of this method's prediction of the springback shape of two bent processes has been confirmed. As a result, it was found that the springback shape even in severe bending can be predicted with high accuracy. Moreover, the calculation time in the proposed shell element is about twice that in the conventional shell element, and has been shortened to about 1/20 compared to a solid element.

Iwata, Noritoshi; Murata, Atsunobu; Yogo, Yasuhiro [Advanced Metal Lab., Toyota Central R and D Labs., Nagakute, Aichi, 480-1192 (Japan); Tsutamori, Hideo [Stamping Engineering Div., Toyota Motor Corporation, 1, Motomachi-cho, Toyota, Aichi, 471-8573 (Japan); Niihara, Masatomo [Chassis Production Engineering Div., Toyota Motor Corporation, 1, Toyota-cho, Toyota, Aichi, 471-8571 (Japan); Ishikura, Hiroshi [Measurement and Instrumentation Engineering Div., Toyota Motor Corporation, 1, Toyota-cho, Toyota, Aichi, 471-8571 (Japan); Umezu, Yasuyoshi [Engineering Technology Div., JRI Solutions, Ltd., 3-10-19 Minami-semba, Chuo-ku, Osaka, 542-0081 (Japan)

2007-05-17T23:59:59.000Z

492

Numerical simulation of linear fiction welding (LFW) processes  

Science Conference Proceedings (OSTI)

Solid state welding processes are becoming increasingly important due to a large number of advantages related to joining ''unweldable'' materials and in particular light weight alloys. Linear friction welding (LFW) has been used successfully to bond non-axisymmetric components of a range of materials including titanium alloys, steels, aluminum alloys, nickel, copper, and also dissimilar material combinations. The technique is useful in the research of quality of the joints and in reducing costs of components and parts of the aeronautic and automotive industries.LFW involves parts to be welded through the relative reciprocating motion of two components under an axial force. In such process the heat source is given by the frictional forces work decaying into heat determining a local softening of the material and proper bonding conditions due to both the temperature increase and the local pressure of the two edges to be welded. This paper is a comparative test between the numerical model in two dimensions, i.e. in plane strain conditions, and in three dimensions of a LFW process of AISI1045 steel specimens. It must be observed that the 3D model assures a faithful simulation of the actual threedimensional material flow, even if the two-dimensional simulation computational times are very short, a few hours instead of several ones as the 3D model. The obtained results were compared with experimental values found out in the scientific literature.

Fratini, L.; La Spisa, D. [University of Palermo-Dept. of Industrial engineering (Italy)

2011-05-04T23:59:59.000Z

493

Tropical cyclone Tracy numerical guidance then and now  

E-Print Network (OSTI)

The passing of over three decades since tropical cyclone Tracy devastated Darwin on Christmas Day 1974 provided a reason to reflect upon the progress of numerical weather prediction over that period. Each decade was characterised by major model changes. In Australia, the 1970s saw the operational implementation of a 7-level baroclinic filtered model at a grid spacing of 254 km, with rudimentary representation of physical processes. The 1980s witnessed the operational introduction of a 12-level primitive equations model with a grid spacing of 150 km and enhanced representation of both the data assimilation approach and the model physics. Finally, in the 1990s the modeling capacity had reached the point where a 40-level model with a grid spacing of 5 km, such as the one employed here, could be run in near real-time, nested over the area of interest. Some research versions also had became available at even higher resolutions. Further improvements in the representation of physical processes and advanced data assimilation procedures, such as 4D-Var, were also available. Here, three models similar to those cited above were run out to 48 hours for the tropical cyclone Tracy case. In all models a bogussed vortex was required to provide

John F. Le Marshall; Lance M. Leslie

2009-01-01T23:59:59.000Z

494

Numerical study of error propagation in Monte Carlo depletion simulations  

Science Conference Proceedings (OSTI)

Improving computer technology and the desire to more accurately model the heterogeneity of the nuclear reactor environment have made the use of Monte Carlo depletion codes more attractive in recent years, and feasible (if not practical) even for 3-D depletion simulation. However, in this case statistical uncertainty is combined with error propagating through the calculation from previous steps. In an effort to understand this error propagation, a numerical study was undertaken to model and track individual fuel pins in four 17 x 17 PWR fuel assemblies. By changing the code's initial random number seed, the data produced by a series of 19 replica runs was used to investigate the true and apparent variance in k{sub eff}, pin powers, and number densities of several isotopes. While this study does not intend to develop a predictive model for error propagation, it is hoped that its results can help to identify some common regularities in the behavior of uncertainty in several key parameters. (authors)

Wyant, T.; Petrovic, B. [Nuclear and Radiological Engineering, Georgia Inst. of Technology, 770 State Street, Atlanta, GA 30332-0745 (United States)

2012-07-01T23:59:59.000Z

495

Numerical studies on the geomechanical stability ofhydrate-bearing sediments  

Science Conference Proceedings (OSTI)

The thermal and mechanical loading of oceanicHydrate-Bearing Sediments (HBS) can result in hydrate dissociation and asignificant pressure increase, with potentially adverse consequences onthe integrity and stability of the wellbore assembly, the HBS, and thebounding formations. The perception of HBS instability, coupled withinsufficient knowledge of their geomechanical behavior and the absence ofpredictive capabilities, have resulted in a strategy of avoidance of HBSwhen locating offshore production platforms, and can impede thedevelopment of hydrate deposits as gas resources.In this study weinvestigate in three cases of coupled hydraulic, thermodynamic andgeomechanical behavior of oceanic hydrate-bearing sediments. The firstinvolves hydrate heating as warm fluids from deeper conventionalreservoirs ascend to the ocean floor through uninsulated pipesintersecting the HBS. The second case describes system response duringgas production from a hydrate deposit, and the third involves mechanicalloading caused by the weight of structures placed on the ocean flooroverlying hydrate-bearing sediments.For the analysis of the geomechanicalstability of HBS, we developed and used a numerical model that integratesa commercial geomechanical code and a simulator describing the coupledprocesses of fluid flow, heat transport and thermodynamic behavior in theHBS. Our simulation results indicate that the stability of HBS in thevicinity of warm pipes may be significantly affected, especially if thesediments are unconsolidated and more compressible. Gas production fromoceanic deposits may also affect the geomechanical stability of HBS underthe conditions that are deemed desirablefor production. Conversely, theincreased pressure caused by the weight of structures on the ocean floorincreases the stability of underlying hydrates.

Rutqvist, Jonny; Moridis, George J.

2007-05-01T23:59:59.000Z

496

Numerical modeling of dish-Stirling reflux solar receivers  

DOE Green Energy (OSTI)

Using reflux solar receivers to collect solar energy for dish-Stirling electric power generation systems is currently being investigated by several organizations, including Sandia National Laboratories, Albuquerque, New Mexico. In support of this program, Sandia has developed two numerical models describing the energy transfer within and thermal performance of pool-boiler and heat-pipe receivers. Both models are applicable to axisymmetric geometries and they both consider the radiative and convective energy transfer within the receiver cavity, the conductive and convective energy transfer within the receiver cavity, the conductive and convective energy transfer from the receiver housing, and the energy transfer to the receiver working fluid. In these models, the radiative transfer within the receiver is analyzed using a two-band (solar and infrared) net-radiation formulation for enclosure radiation. Empirical convective correlations describe the convective heat transfer from the cavity to the surroundings. The primary difference between the models is the level of detail in modeling the heat conduction through the receiver walls. The more detailed model uses a two-dimensional finite control volume method, whereas the simpler model uses a one-dimensional thermal resistance approach. 20 refs., 7 figs., 2 tabs.

Hogan, R.E.

1990-01-01T23:59:59.000Z

497

Numeric modeling of fire suppression by organophosphorous inhibitors  

E-Print Network (OSTI)

Numerical calculations of the effect of organophosphorous inhibitor (CF3CH2O)3P and its mixtures with carbon dioxide on propane flames are carried out using the three dimensional Reynolds-averaged Navier-Stokes (RANS) equations in the low Mach number approximation. The k-e model of turbulence, the EDC combustion model and the weighted-sum-of-gray-gases model of radiation are used. The Westbrook global-kinetic scheme with fractional order of reaction was used for the calculation of chemical reaction rate of propane combustion. The empirical expression for the correction factor for the chemical reaction rate was used to model the effect of organophosphorous inhibitor no the reaction. Two series of test calculations for different values of the correction factor are carried out. Dependences of the minimum extinguishing concentration of the inhibitor per carbon dioxide volume concentration in the extinguishing mixtures were obtained. The results of test calculations are shown to agree reasonably with the experimen...

Makhviladze, G M; Zykov, A P

2008-01-01T23:59:59.000Z

498

Topological Insulators and C^*-Algebras: Theory and Numerical Practice  

E-Print Network (OSTI)

We apply ideas from $C^*$-algebra to the study of disordered topological insulators. We extract certain almost commuting matrices from the free Fermi Hamiltonian, describing band projected coordinate matrices. By considering topological obstructions to approximating these matrices by exactly commuting matrices, we are able to compute invariants quantifying different topological phases. We generalize previous two dimensional results to higher dimensions; we give a general expression for the topological invariants for arbitrary dimension and several symmetry classes, including chiral symmetry classes, and we present a detailed $K$-theory treatment of this expression for time reversal invariant three dimensional systems. We can use these results to show non-existence of localized Wannier functions for these systems. We use this approach to calculate the index for time-reversal invariant systems with spin-orbit scattering in three dimensions, on sizes up to $12^3$, averaging over a large number of samples. The results show an interesting separation between the localization transition and the point at which the average index (which can be viewed as an "order parameter" for the topological insulator) begins to fluctuate from sample too sample, implying the existence of an unsuspected quantum phase transition separating two different delocalized phases in this system. One of the particular advantages of the $C^*$-algebraic technique that we present is that it is significantly faster in practice than other methods of computing the index, allowing the study of larger systems. In this paper, we present a detailed discussion of numerical implementation of our method.

M. B. Hastings; T. A. Loring

2010-12-05T23:59:59.000Z

499

Alpha migration through air filters: A numerical simulation  

Science Conference Proceedings (OSTI)

This theoretical study investigates the migration of alpha-emitting particles through high-efficiency particulate air (HEPA) filters. As part of the study, a review of previous research relating to the alpha-migration phenomena was conducted. As a result of the literature review, a numerical model was developed to simulate the migration of alpha-emitting radionuclide aerosols through HEPA filters. This model predicts the filter performance with regard to particle penetration. It can be used to better estimate the penetration of alpha radioactive species through filter systems for environmental concerns, to aid in the use of current filter systems, and to design new filter systems. It is obvious from the review of the literature that evidence exists of migration of alpha radionuclide species through high-efficiency filter media. The theories suggest that nanometer-size particles can eventually penetrate fibrous filters because of gradual movement through the filter matrix. It is conjectured that this movement may be induced by energies caused by the alpha recoil from the decay process by thermal energies. It is further hypothesized that such nanometer-size particles, containing radionuclide species can be formed from larger particles already captured within the filter. The penetration of such small particles through high-efficiency filter media is so low that experimental corroboration of these mechanisms by penetration measurements is difficult at best. A number of items were identified that affect the migration of alpha-emitting particles through a filter. These include the size distribution of aerosol particles entering the filter, the size distribution of fragment particles produced by alpha recoil, the penetration of the challenge aerosols and fragment particles, the velocity through the filter, the radionuclide specific activity, the alpha recoil energy, and the surface-binding energies between the particle and the filter matrix.

Biermann, A.H.; da Roza, R.A.; Chang, Yun.

1991-12-11T23:59:59.000Z

500

Recommended ALIs and DACs for 10 CFR part 220: A consistent numerical set  

Science Conference Proceedings (OSTI)

Appendix B to 10 CFR Part 20 contains numerical data for controlling the intake of radionuclides in the workplace or in the environment. These data, derived from the recommendations of the International Commission on Radiological Protection (ICRP), do not provide a numerically consistent basis for demonstrating compliance with the limitation on dose stated in the regulation. This situation is largely a consequence of the numerical procedures used by the ICRP which did not maintain, in a strict numerical sense, the hierarchial relationship among the radiation protection quantities. In this work recommended values of the quantities in Appendix B to CFR Part 20 are developed using the dose coefficients of the applicable ICRP publications and a numerical procedure which ensures that the tabulated quantities are numerically consistent.

Eckerman, K.F.

1996-05-01T23:59:59.000Z