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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

Understanding the Hydrodynamics of Swimming: From Fish Fins to Flexible Propulsors for Autonomous  

E-Print Network [OSTI]

Understanding the Hydrodynamics of Swimming: From Fish Fins to Flexible Propulsors for Autonomous. The research effort described here is concerned with developing a maneuvering propulsor for an autonomous

Lauder, George V.

2

Propulsion efficiencies of magnetohydrodynamic propulsors considering electrical and magnetic end effects. Research and development report  

SciTech Connect (OSTI)

A mathematical theory for the performance of a direct current, rectangular duct magnetohydrodynamic (MBD) propulsion system propelling a marine vehicle is presented. The model accounts for the effects of spatially nonuniform magnetic fields and current distributions which are present at the ends of the propulsion unit. The theory is based on an approximate solution of the general NM duct flow problem in which the mutual interaction of the electric current and fluid flow in a strong magnetic field are considered in detail. For a specified vehicular steady state cruising speed, the propulsive efficiency and electrical power requirements can be calculated from the theory given the hydrodynamic drag of the vehicle and the properties of the fluid medium. Explicit electrical end loss factors are calculated to relate the performance of a propulsor with nonuniform field distributions to the performance of an idealized propulsor with no end losses operating under the same conditions. The power losses due to auxiliary equipment such as electrical generators, buswork, and magnetic cryogenic systems are not included in the study. Numerical results from the models for five design configurations for a nominal geometry under a reasonable range of operating parameters are presented. The numerical results, including the ideal propulsor with no end effects, indicate that the fringing magnetic and current distributions at the ends of the duct generally significantly degrade the propulsive efficiency. The degree of degradation depends on details of the design configuration of the rectangular duct.

Beatty, P.A.; Hughes, W.F.; Brown, S.H.; Walters, J.D.; Sondergaard, N.A.

1992-04-01T23:59:59.000Z

3

Naval Engineering A National Naval Obligation  

E-Print Network [OSTI]

As part of its national obligations, ONR must ensure US world leadership in those unique technology areas that insure naval superiority. ONR accomplishes this mission through research, recruitment and education, maintaining ...

Chryssostomidis, Chryssostomos

2000-05-16T23:59:59.000Z

4

Early American Naval Sigint  

Science Journals Connector (OSTI)

After the Battle of Midway, Laurance Safford, The primary source on early USN Comint work is the booklet US Naval Communications Intelligence Activities by Laurance Safford, J. N. Wenger and at le...

Peter Donovan; John Mack

2014-01-01T23:59:59.000Z

5

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

6

Naval Spent Fuel Rail Shipment Accident Exercise Objectives ...  

Office of Environmental Management (EM)

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

7

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

8

Numerical  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of the mean flow, in which turbulence generated currents are investigated in subcritical flows. II. NUMERICAL MODEL The numerical model used in this paper solves the MHD...

9

Naval Petroleum Reserves | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

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...

10

The Institution of Naval Architects  

Science Journals Connector (OSTI)

... THE annual spring meeting of the Institution of Naval Architects was held on Wednesday, Thursday, and Friday ... U.S. Navy."On the Method of initial Condensation and Heat Waste in Steam Engine Cylinders,"by Prof. R. H. Thurston, Sibley College, Cornell University, New ...

1895-04-11T23:59:59.000Z

11

The Institution of Naval Architects  

Science Journals Connector (OSTI)

... LAST week the Institution of Naval Architects held their annual spring meeting, under the chairmanship of Admiral Sir John Dalrymple Hay, one of the Vice ... Chief Surveyor Lloyd's Registry of Shipping; (13) "Steam pressure losses in marine engines,"by C. E. Stromeyer, Engineer Surveyor Lloyd's Registry of Shipping; (15 ...

1894-03-22T23:59:59.000Z

12

The Institution of Naval Architects  

Science Journals Connector (OSTI)

... THE annual spring meeting of the Institution of Naval Architects was held last week at the Society of ... elements of design of three imaginary battleships, propelled respectively by steam, gas, or oil engines. It is somewhat startling to find the chief engineer of one of our most ...

1907-03-28T23:59:59.000Z

13

Demand response at the Naval Postgraduate School .  

E-Print Network [OSTI]

??The purpose of this MBA project is to assist the Naval Postgraduate School's Public Works department to assimilate into a Demand Response program that will… (more)

Stouffer, Dean

2008-01-01T23:59:59.000Z

14

About Naval Reactors | National Nuclear Security Administration  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

fleet to remain on station is further enhanced by our ability to forward-deploy repair and maintenance activities. Schools and Training Facilities The Naval Nuclear...

15

U.S. Naval war College Application | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

College Application U.S. Naval war College Application U.S. Naval War College Civilian Student Application. Naval War College Application More Documents & Publications DOE F 471.1...

16

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

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

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

17

Integrated probabilistic design of marine propulsors to minimize lifetime fuel consumption  

Science Journals Connector (OSTI)

Marine propellers are typically designed to achieve optimal performance at a single or a few design points. It is well understood that the performance of marine propulsion systems decays at off-design conditions, where the system operates for the majority of its life, where fuel consumption rates are high and the system as a whole operates at lower efficiencies. This paper presents a novel integrated design methodology that considers the propeller, prime mover, and vessel as one integrated system, and considers the probabilistic operational profile of the vessel, to minimize lifetime fuel consumption. The proposed design methodology represents a new approach to evaluate the tradeoffs between different design objectives and constraints by considering the system performance characteristics along with probability of occurrence, and hence allows for global optimization of the propeller geometry. Results are shown for a pair of fixed-pitch propellers designed for a twin-screw naval combatant craft. System performance for a design obtained using the proposed methodology is compared with designs obtained using traditional point-based design approaches. This methodology can be easily extended to investigate the effects of variations in resistance, operational profile or additional performance criteria, such as safety during extreme operations, lifetime carbon emission, and life cycle costs.

Michael R. Motley; Mayer Nelson; Yin L. Young

2012-01-01T23:59:59.000Z

18

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

Broader source: Energy.gov (indexed) [DOE]

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

19

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

20

The Naval Petroleum and Oil Shale Reserves | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) 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...

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

Fuel Cell Power Plant Experience Naval Applications | Department...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Plant Experience Naval Applications Fuel Cell Power Plant Experience Naval Applications Presented at the DOE-DOD Shipboard APU Workshop on March 29, 2011. apu20118wolak.pdf More...

22

2014 Annual Planning Summary for the NNSA Naval Reactors  

Broader source: Energy.gov [DOE]

The ongoing and projected Environmental Assessments and Environmental Impact Statements for 2014 and 2015 within the NNSA Naval Reactors.

23

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

24

Naval Academy: Lockstep Program Is Abandoned  

Science Journals Connector (OSTI)

...and the building of safe water systems and sewers...Academy adopted two fundamental changes of policy...were descriptions of boilers, pumps, and guns included...Instruction in the operation of specific naval radar...such details of the operation as aquanaut experiences...

Luther J. Carter

1965-11-19T23:59:59.000Z

25

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

26

Fuel Cell Power Plant Experience Naval Applications  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

27

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

Office of Legacy Management (LM)

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...

28

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

29

Naval Construction Battalion Center Gulfport- Mississippi Power Partnership Success Story  

Broader source: Energy.gov [DOE]

Presentation covers the Naval Construction Battalion Center Gulfport - Mississippi Power Partnership success story given at the Spring 2009 Federal Utility Partnership Working Group (FUPWG) meeting...

30

DOE - Office of Legacy Management -- Naval Petroleum Reserve...  

Office of Legacy Management (LM)

Naval Petroleum Reserve No. 3 is located in Natrona County, Wyoming. The site is a small oil field and covers approximately 9400 acres. Environmental remediation efforts are...

31

Naval Spent Fuel Rail Shipment Accident Exercise Objectives  

Broader source: Energy.gov (indexed) [DOE]

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

32

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

33

Naval Petroleum Reserve No. 3 Disposition Decision Analysis and Timeline  

Broader source: Energy.gov [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.

34

DOE - Office of Legacy Management -- Naval Gun Factory and Bureau...  

Office of Legacy Management (LM)

Gun Factory and Bureau of Ordnance - DC 0-01 FUSRAP Considered Sites Site: NAVAL GUN FACTORY AND BUREAU OF ORDNANCE (DC.0-01) Eliminated from consideration under FUSRAP - Referred...

35

Captain Erik Stohlmann graduated from high school in Fort Worth, TX before attending the United States Naval Academy. He was commissioned in 1992 after earning a Bachelor of  

E-Print Network [OSTI]

Science. Following the Naval Academy, he was assigned to NAS Pensacola, FL for Flight Training. After flown during OPERATION IRAQI FREEDOM as well as numerous contingency operations in the CENTCOM AOR. He was selected for redesignation as a Navy Foreign Area Officer. Captain Stohlmann' s staff assignments include

36

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

Broader source: Energy.gov (indexed) [DOE]

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

37

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

38

Tag: Naval Reactors | Y-12 National Security Complex  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

39

FY 2012 Budget Hearing Testimony on Nuclear Nonproliferation and Naval  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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 ...

40

Statement on Defense Nuclear Nonproliferation and Naval Reactors Activities  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

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

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 ...

42

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

43

Reactor Safety Planning for Prometheus Project, for Naval Reactors Information  

SciTech Connect (OSTI)

The purpose of this letter is to submit to Naval Reactors the initial plan for the Prometheus project Reactor Safety work. The Prometheus project is currently developing plans for cold physics experiments and reactor prototype tests. These tests and facilities may require safety analysis and siting support. In addition to the ground facilities, the flight reactor units will require unique analyses to evaluate the risk to the public from normal operations and credible accident conditions. This letter outlines major safety documents that will be submitted with estimated deliverable dates. Included in this planning is the reactor servicing documentation and shipping analysis that will be submitted to Naval Reactors.

P. Delmolino

2005-05-06T23:59:59.000Z

44

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

45

362 SDSU General Catalog 2012-2013 Naval Science  

E-Print Network [OSTI]

turbine, and diesel propulsion engines receive in-depth study. Leadership topics in an engineering setting Power and Maritime Affairs (3) Sea power and maritime affairs; general concept of sea power including Merchant Marine; role of naval warfare components used to support the Navy's mission; sea power

Gallo, Linda C.

46

368 SDSU General Catalog 2013-2014 Naval Science  

E-Print Network [OSTI]

turbine, and diesel propulsion engines receive in-depth study. Leadership topics in an engineering setting Power and Maritime Affairs (3) Sea power and maritime affairs; general concept of sea power including Merchant Marine; role of naval warfare components used to support the Navy's mission; sea power

Gallo, Linda C.

47

Naval Postgraduate School Monterey, California 93943-5138  

E-Print Network [OSTI]

-related challenges of the future. To fulfill its mission, the Naval Postgraduate School strives to sustain excellence to achieve three major goals: 1) academic programs that are nationally recognized and support the current that focus on the integration of teaching and research in direct support of the four pillars of Joint Visions

48

Naval Postgraduate School Monterey, California 93943-5138  

E-Print Network [OSTI]

challenges of the future. To fulfill its mission, the Naval Postgraduate School strives to sustain excellence research programs to achieve three major goals: 1) academic programs that are nationally recognized of the four pillars of Joint Visions 2010 and 2020 and their enabling technologies; and, 3) executive

49

Naval Postgraduate School Monterey, California 93943-5138  

E-Print Network [OSTI]

related challenges of the future. To fulfill its mission, the Naval Postgraduate School strives to sustain programs to achieve three major goals: 1) academic programs that are nationally recognized and support) institutes that focus on the integration of teaching and research in direct support of the four pillars

50

Naval Postgraduate School Monterey, California 93943-5138  

E-Print Network [OSTI]

the security of the United States. To fulfill its mission, the Naval Postgraduate School strives to sustain programs to achieve three major goals: 1) academic programs that are nationally recognized and support) institutes that focus on the integration of teaching and research in direct support of the four pillars

51

Naval Postgraduate School Monterey, California 93943-5138  

E-Print Network [OSTI]

-related challenges of the future. To fulfill its mission, the Naval Postgraduate School strives to sustain excellence Postgraduate School has aligned its education and supporting research programs to achieve three major goals: 1 of teaching and research in direct support of the four pillars of Joint Visions 2010 and 2020

52

Calculation of the Naval Long and Short Waste Package Three-Dimensional Thermal Interface Temperatures  

SciTech Connect (OSTI)

The purpose of this calculation is to evaluate the thermal performance of the Naval Long and Naval Short spent nuclear fuel (SNF) waste packages (WP) in the repository emplacement drift. The scope of this calculation is limited to the determination of the temperature profiles upon the surfaces of the Naval Long and Short SNF waste package for up to 10,000 years of emplacement. The temperatures on the top of the outside surface of the naval canister are the thermal interfaces for the Naval Nuclear Propulsion Program (NNPP). The results of this calculation are intended to support Licensing Application design activities.

H. Marr

2006-10-25T23:59:59.000Z

53

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;

54

Naval Construction Battalion Center Gulfport - Mississippi Power Partnership Success Story  

Broader source: Energy.gov (indexed) [DOE]

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

55

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":""}]}

56

E-Print Network 3.0 - andreyev bay naval Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

at the exact location (inside the bay) where the naval operations take place... . Armstrong, 2004. Prediction of instantaneous currents in San Diego ... Source: Chu, Peter C. -...

57

Board of Advisors to the Presidents of the Naval Postgraduate School and the Naval War College Annual Joint Meeting of the Subcommittees: Board of Advisors to the President, Naval Postgraduate  

E-Print Network [OSTI]

as the NPS sub-committee board members reviewed SECNAVINST 1524.2B. During the lunch (Advanced Education Review Board). The AERB was originally put in placeBoard of Advisors to the Presidents of the Naval Postgraduate School

58

SPECKLE INTERFEROMETRY AT THE U.S. NAVAL OBSERVATORY. XVII  

SciTech Connect (OSTI)

The results of 3362 intensified CCD observations of double stars, made with the 26 inch refractor of the U.S. Naval Observatory, are presented. Each observation of a system represents a combination of over 2000 short-exposure images. These observations are averaged into 1970 mean relative positions and range in separation from 0.''78 to 72.''17, with a mean separation of 14.''76. This is the 17th in this series of papers and covers the period 2010 January 6 through December 20. Also presented are 10 pairs that are resolved for the first time.

Mason, Brian D.; Hartkopf, William I.; Wycoff, Gary L., E-mail: bdm@usno.navy.mil, E-mail: wih@usno.navy.mil [U.S. Naval Observatory, 3450 Massachusetts Avenue, NW, Washington, DC 20392-5420 (United States)

2011-08-15T23:59:59.000Z

59

SPECKLE INTERFEROMETRY AT THE U.S. NAVAL OBSERVATORY. XV  

SciTech Connect (OSTI)

Results of 2433 intensified CCD observations of double stars, made with the 26 inch refractor of the U.S. Naval Observatory, are presented. Each observation of a system represents a combination of over 2000 short-exposure images. These observations are averaged into 1013 mean relative positions and range in separation from 0.''96 to 58.''05, with a mean separation of 13.''50. This paper is the 15th in the series of papers and covers the period 2008 January 3 through 2008 December 21.

Mason, Brian D.; Hartkopf, William I.; Wycoff, Gary L., E-mail: bdm@usno.navy.mi, E-mail: wih@usno.navy.mi, E-mail: glw@usno.navy.mi [U.S. Naval Observatory, 3450 Massachusetts Avenue, NW, Washington, DC 20392-5420 (United States)

2010-08-15T23:59:59.000Z

60

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":""}]}

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

Coastal Inundation due to Tide, Surge, Waves, and Sea Level Rise at Naval Station Norfolk  

E-Print Network [OSTI]

Coastal Inundation due to Tide, Surge, Waves, and Sea Level Rise at Naval Station Norfolk Honghai of future sea level rise (SLR) scenarios and to evaluate the potential coastal inundation at Naval Station and sea level rise threats to coastal residents and coastal military facilities, the US Strategic

US Army Corps of Engineers

62

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

Broader source: Energy.gov (indexed) [DOE]

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

63

Laser in situ keratomileusis in United States Naval aviators  

Science Journals Connector (OSTI)

Purpose To evaluate the safety and efficacy of femtosecond-assisted wavefront-guided laser in situ keratomileusis (LASIK) as well as higher-order aberrometric changes in a population of active-duty United States Naval aviators. Setting Navy Refractive Surgery Centers, San Diego, California, and Portsmouth, Virginia, USA. Design Prospective noncomparative 2-site study. Methods In this study of femtosecond-assisted wavefront-guided LASIK, 3 groups were differentiated according to the refractive status: myopia, mixed astigmatism, and hyperopia. Uncorrected (UDVA) and corrected (CDVA) distance visual acuities, refraction, mesopic low-contrast CDVA, higher-order aberrations (HOAs), and patient satisfaction were evaluated during a 3-month follow-up. Results The study enrolled, treated, and included for analysis 548 eyes with myopia, 60 eyes with mixed astigmatism, and 25 eyes with hyperopia. The UDVA was 20/20 or better in 98.3% of eyes with myopia and mixed astigmatism at all postoperative visits and in 95.7% of hyperopic eyes 3 months postoperatively. The gain in CDVA was 1 or more lines in 39.2%, 41.1%, and 30.4% of myopic, mixed astigmatic and hyperopic eyes, respectively. Loss of 2 lines of CDVA after surgery occurred in 2 myopic eyes (0.4%). At 3 months, a mean change of +0.03 ?m ± 0.10 (SD) and +0.05 ± 0.08 ?m was observed in higher-order root mean square and primary spherical aberration, respectively. Of the patients, 95.9% said they believed that LASIK had helped their effectiveness as Naval aviators and 99.6% would recommend the same treatment to others. Conclusion Femtosecond-assisted wavefront-guided LASIK was an efficacious and safe option for refractive correction in Naval aviators, enabling a quick return to flight status. Financial Disclosure Drs. Tanzer and Schallhorn are consultants to Abbott Medical Optics, Inc. No author has a financial or proprietary interest in any material or method mentioned.

David J. Tanzer; Tyson Brunstetter; Richard Zeber; Elizabeth Hofmeister; Sandor Kaupp; Neil Kelly; Myah Mirzaoff; William Sray; Mitch Brown; Steven Schallhorn

2013-01-01T23:59:59.000Z

64

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

65

SPECKLE INTERFEROMETRY AT THE U.S. NAVAL OBSERVATORY. XIX  

SciTech Connect (OSTI)

The results of 2916 intensified CCD observations of double stars, made with the 26 inch refractor of the U.S. Naval Observatory, are presented. Each observation of a system represents a combination of over two thousand short-exposure images. These observations are averaged into 1584 mean relative positions and range in separation from 0.''54 to 98.''09, with a median separation of 11.''73. This is the 19th in this series of papers and covers the period 2012 January 5 through 2012 December 18. Also presented are 10 pairs that are reported for the first time, 17 pairs that appear to be lost, linear elements for 18 pairs, and orbital elements for 2 additional pairs.

Mason, Brian D.; Hartkopf, William I.; Hurowitz, Haley M., E-mail: bdm@usno.navy.mil, E-mail: wih@usno.navy.mil, E-mail: hurowitz@mit.edu [U.S. Naval Observatory, 3450 Massachusetts Avenue, NW, Washington, DC 20392-5420 (United States)

2013-09-15T23:59:59.000Z

66

SPECKLE INTERFEROMETRY AT THE U.S. NAVAL OBSERVATORY. XVIII  

SciTech Connect (OSTI)

The results of 2490 intensified CCD observations of double stars, made with the 26 inch refractor of the U.S. Naval Observatory, are presented. Each observation of a system represents a combination of over 2000 short-exposure images. These observations are averaged into 1462 mean relative positions and range in separation from 0.''56 to 71.''80, with a mean separation of 14.''81. This is the 18th in this series of papers and covers the period 2011 January 3 through 2011 December 18. Also presented are four pairs which are resolved for the first time, thirteen other pairs which appear to be lost, and linear elements for four additional pairs.

Mason, Brian D.; Hartkopf, William I.; Friedman, Elizabeth A., E-mail: bdm@usno.navy.mil, E-mail: wih@usno.navy.mil, E-mail: efriedman09@ucla.edu [U.S. Naval Observatory, 3450 Massachusetts Avenue, NW, Washington, DC 20392-5420 (United States)

2012-05-15T23:59:59.000Z

67

Naval Reactors Facility Environmental Monitoring Report, Calendar Year 2003  

SciTech Connect (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

68

Naval Petroleum Reserves: assessment of alternative operating strategies beyond 1982  

SciTech Connect (OSTI)

Legislation authorizing production from two Naval Petroleum Reserves, i.e., NPR-1 (Elk Hills, California) and NPR-3 (Teapot Dome, Wyoming), expires in 1982. This paper presents an assessment of the trade-offs of extending production or returning to a shut-in status. Strategic, economic, and energy factors at the national, regional, and local levels are considered. The results of the study indicate that the only major local impact of shut-in will be on small refineries near NPR-1. At the national level, shut-in increases the size of the national petroleum reserve system. However, economic losses as measured by changes in the present value of real GNP also occur. The estimate of the increase in the size of the national petroleum reserve with shut-in of the NPRs was found to be most sensitive to the assumed length of future import interruptions.

Gsellman, L.R.; Mendis, M.S.; Rosenberg, J.I.

1981-08-01T23:59:59.000Z

69

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

Broader source: Energy.gov (indexed) [DOE]

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

70

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

Broader source: Energy.gov (indexed) [DOE]

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).

71

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

72

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

Broader source: Energy.gov (indexed) [DOE]

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.

73

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

Broader source: Energy.gov [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...

74

EIS-0158: Sale of the Naval Petroleum Reserve No. 1 at Elk Hills, California (1997)  

Broader source: Energy.gov [DOE]

The U.S. Department of Energy developed this EIS to assess the potential environmental impacts of the continued operation of the Naval Petroleum Reserve No. 1 at the Maximum Efficient Rate authorized by Public Law 94-258.

75

Carl Vinson and pre-war naval legislation 1932-1940  

E-Print Network [OSTI]

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...

Svonavec, Stephen Charles

2012-06-07T23:59:59.000Z

76

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

77

Analysis of harmonic distortion in an Integrated Power System for naval applications  

E-Print Network [OSTI]

This research quantifies the voltage distortion over the broad range of operating conditions experienced by a Naval warship. A steady state model of an Integrated Power System (IPS) was developed in a commercially available ...

West, Edward G., S.M. Massachusetts Institute of Technology

2005-01-01T23:59:59.000Z

78

EIS-0068: Development Policy Options for the Naval Oil Shale Reserves in Colorado  

Broader source: Energy.gov [DOE]

The U.S. Department of Energy Office of Naval Petroleum and Oil Shale Reserves prepared this programmatic statement to examine the environmental and socioeconomic impacts of development projects on the Naval Oil Shale Reserve 1, and examine select alternatives, such as encouraging production from other liquid fuel resources (coal liquefaction, biomass, offshore oil and enhanced oil recovery) or conserving petroleum in lieu of shale oil production.

79

SPECKLE INTERFEROMETRY AT THE U.S. NAVAL OBSERVATORY. XVI  

SciTech Connect (OSTI)

The results of 1031 speckle-interferometric observations of double stars, made with the 26 inch refractor of the U.S. Naval Observatory, are presented. Each speckle-interferometric observation of a system represents a combination of over two thousand short-exposure images. These observations are averaged into 457 mean relative positions and range in separation from 0.''15 to 16.''94, with a median separation of 3.''03. The range in V-band magnitudes for the primary (secondary) of observed targets is 3.1-12.9 (3.2-13.3). This is the sixteenth in a series of papers presenting measurements obtained with this system and covers the period 2009 January 12 through 2009 December 17. Included in these data are 12 older measurements whose positions were previously deemed possibly aberrant, but are no longer classified this way following a confirming observation. Also, 10 pairs with a single observation are herein confirmed. This paper also includes the first data obtained using a new ICCD with fiber optic cables.

Mason, Brian D.; Hartkopf, William I.; Wycoff, Gary L., E-mail: bdm@usno.navy.mil, E-mail: wih@usno.navy.mil [U.S. Naval Observatory, 3450 Massachusetts Avenue, NW, Washington, DC 20392-5420 (United States)

2011-05-15T23:59:59.000Z

80

Renewable Energy Optimization Report for Naval Station Newport  

SciTech Connect (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

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.


81

Distributed energy resources at naval base ventura county building 1512  

SciTech Connect (OSTI)

This paper reports the findings of a preliminary assessment of the cost effectiveness of distributed energy resources at Naval Base Ventura County (NBVC) Building 1512. This study was conducted in response to the base's request for design assistance to the Federal Energy Management Program. Given the current tariff structure there are two main decisions facing NBVC: whether to install distributed energy resources (DER), or whether to continue the direct access energy supply contract. At the current effective rate, given assumptions about the performance and structure of building energy loads and available generating technology characteristics, the results of this study indicate that if the building installed a 600 kW DER system with absorption cooling and heat capabilities chosen by cost minimization, the energy cost savings would be about 14 percent, or $55,000 per year. However, under current conditions, this study also suggests that significant savings could be obtained if Building 1 512 changed from the direct access contract to a SCE TOU-8 (Southern California Edison time of use tariff number 8) rate without installing a DER system. At current SCE TOU-8 tariffs, the potential savings from installation of a DER system would be about 4 percent, or $15,000 per year.

Bailey, Owen C.; Marnay, Chris

2004-10-01T23:59:59.000Z

82

New case for naval arms control. Interim report, September-December 1992  

SciTech Connect (OSTI)

This paper opens with an examination of existing legal restraints on naval forces and arms control agreements and concludes that the U.S. is already heavily engaged in naval arms control. Given the new international security environment and the new U.S. regionally-oriented national security and military strategies, the author then recommends a series of additional naval arms control measures that should be taken: exchanges of data, transparency, INCSEA, cooperative measures, an agreement on the laws of submarine warfare, abolishing NCND, no first tactical nuclear use at sea, NWFZs, advanced notification of operational-level exercises, environmental protection measures, controls over maritime technologies, armed escorts of nuclear shipments, new Roes, PALs, the resolution of outstanding political issues at sea, deep cuts in nuclear forces, CFE follow-on, limits on specific types of naval forces, geographic limits, expanded standing naval forces, and a re negotiation of the ABM Treaty. The paper then addresses verification and compliance issues. Author concludes that since the U.S. Navy has already managed to avoid major arms control while balanced on the precarious slippery slope, there is no reason to continue its stonewalling policies.

Tritten, J.J.

1992-12-04T23:59:59.000Z

83

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

84

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

85

Updated 1-12 Mr. John C. Goodhart became the Vice Commander and senior civilian of the Naval Supply  

E-Print Network [OSTI]

is responsible for quality-of-life issues for our naval forces, including food service, postal services, Navy Executive Service since July 2002. NAVSUP's primary mission is to provide U.S. naval forces with quality supplies and services. The organization oversees logistics programs in the areas of supply operations

86

Modeling of Coastal Inundation, Storm Surge, and Relative Sea-Level Rise at Naval Station Norfolk, Norfolk, Virginia, U.S.A.  

E-Print Network [OSTI]

Modeling of Coastal Inundation, Storm Surge, and Relative Sea- Level Rise at Naval Station Norfolk. Modeling of coastal inundation, storm surge, and relative sea-level rise at Naval Station Norfolk, Norfolk, and relative sea-level-rise (RSLR) scenarios were examined at the U.S. Naval Station, Norfolk, Virginia

US Army Corps of Engineers

87

Naval Research Laboratory Memorandum Report, 2003 Perceptual and Ergonomic Issues in  

E-Print Network [OSTI]

Naval Research Laboratory Memorandum Report, 2003 1 Perceptual and Ergonomic Issues in Mobile paradigm, the field needs a much better understanding of the fundamental perceptual and ergonomic issues aimed at both understanding the fundamental perceptual and ergonomic issues in AR display

Swan II, J. Edward

88

Karen Swider-Lyons, Peter Bouwman, Norma Ugarte Naval Research Laboratory  

E-Print Network [OSTI]

metal oxides for PEMFC cathodes Low-platinum hydrous metal oxides for PEMFC cathodes #12;Naval Research-NbPOx compounds Receive LANL test results for Pt-FePOx catalyst performance in a PEMFC - poor performance Acquire on lowering Pt in fuel cell cathode · Cathode has most Pt because slow oxygen reduction kinetics poor Pt

89

Naval Station Norfolk, VA- Energy Conservation Program UESC Partnership Success Story  

Broader source: Energy.gov [DOE]

Presentation—given at the Federal Utility Partnership Working Group (FUPWG) Fall 2008 meeting—covers the basis for success of a U.S. Navy utility energy service contract (UESC) project at a Naval Station in Norfolk, Virginia, including the project phases and why the utility partnership works.

90

Boiler Upgrades and Decentralizing Steam Systems Save Water and Energy at Naval Air Station Oceana  

Broader source: Energy.gov [DOE]

Case study details Naval Air Station Oceana findings that its heating needs could be met more efficiently by replacing its central plant with a combination of distributed boilers and ground source heat pumps. The results saved more than 1 million MBtu in energy and 19,574 Kgal of water annually.

91

Don AtwoodNaval Postgraduate School Workshop 9 August 1 Monitoring Marine Ecosystems  

E-Print Network [OSTI]

School Workshop ­ 9 August 9 NRT Support Walrus Tracking U.S. Fish and Wildlife Service USGS Alaska Environment U.S. Fish and Wildlife Service USGS Alaska Science Center #12;Don AtwoodNaval Postgraduate School Interactions Hurricane Ivan What does SAR see? · surface roughness of the water Fortunately, wind, atmospheric

92

Symposium on Naval Hydrodynamics Gothenburg, Sweden, 26-31 August 2012  

E-Print Network [OSTI]

29th Symposium on Naval Hydrodynamics Gothenburg, Sweden, 26-31 August 2012 High will be dramatically different from current mainstream supercomputers in terms of computing power and parallel are demonstrated for plunging breaking waves behind a bump using 2.2 billion grid points running on thousands

Yang, Jianming

93

Low Energy Nuclear Reaction Research at the Naval Research Laboratory D.A. Kidwell1  

E-Print Network [OSTI]

Low Energy Nuclear Reaction Research at the Naval Research Laboratory D.A. Kidwell1 , D have explored the field of Low Energy Nuclear Reactions (LENR) for about eight years focusing energy (as heat) is produced ­ neither nuclear products nor transmutations have been firmly established

Noble, James S.

94

"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...

Wadle, Ryan David

2012-07-16T23:59:59.000Z

95

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

96

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

97

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

98

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

Broader source: Energy.gov (indexed) [DOE]

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.

99

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

100

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

SciTech Connect (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.


101

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

Broader source: Energy.gov [DOE]

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

102

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

SciTech Connect (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

103

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

104

naval reactors  

National Nuclear Security Administration (NNSA)

After operating for 34 years and training over 14,000 sailors, the Department of Energy S1C Prototype Reactor Site in Windsor, Connecticut, was returned to "green field"...

105

Reconnaissance of geothermal resources near US naval facilities in the San Diego area, California  

SciTech Connect (OSTI)

A reconnaissance study has found little evidence of potential geothermal resources useful at naval facilities in the greater San Diego metropolitan area. However, there is a zone of modest elevated water well temperatures and slightly elevated thermal gradients that may include the eastern portion of the Imperial Beach Naval Air Station south of San Diego Bay. An increase of 0.3/sup 0/ to 0.4/sup 0/F/100 ft over the regional thermal gradient of 1.56/sup 0/F/100 ft was conservatively calculated for this zone. The thermal gradient can be used to predict 150/sup 0/F temperatures at a depth of approximately 4000 ft. This zone of greatest potential for a viable geothermal resource lies within a negative gravity anomaly thought to be caused by a tensionally developed graben, approximately centered over the San Diego Bay. Water well production in this zone is good to high, with 300 gpm often quoted as common for wells in this area. The concentration of total dissolved solids (TDS) in the deeper wells in this zone is relatively high due to intrusion of sea water. Productive geothermal wells may have to be drilled to depths economically infeasible for development of the resource in the area of discussion.

Youngs, L.G.

1984-01-01T23:59:59.000Z

106

EIS-0158-S2: Supplemental Environmental Impact Statement Naval Petroleum Reserve No. 1 (Elk Hills), Kern County, California  

Broader source: Energy.gov [DOE]

The U.S. Department of Energy developed this statement, the supplement to DOE/EIS-0158, to analyze the environmental and socioeconomic impacts of the sale of Naval Petroleum Reserve No. 1 in Kern County, California to Occidental Petroleum Corporation.

107

Multi-star multi-phase winding for a high power naval propulsion machine with low ripple torques  

E-Print Network [OSTI]

Permanent Magnet (SMPM) Machine designed for naval propulsion is proposed. The design objective of this high if the magnetic couplings between the stars is weak. The 4-star 3-phase winding proposed in this paper is designed star being magnetically shifted by an angle of 15 degrees. This 4-star 3-phase configuration allows

Boyer, Edmond

108

COMPUTER SIMULATION OF THE UMER ELECTRON GUN* I. Haber, Plasma Physics Division, Naval Research Laboratory, Washington, DC 20375  

E-Print Network [OSTI]

COMPUTER SIMULATION OF THE UMER ELECTRON GUN* I. Haber, Plasma Physics Division, Naval Research conducted with the aim of understanding the space-charge-dominated physics in the gun and injector transport is on simulating the beam propagation in the gun region between the cathode grid and the anode grid for comparison

Valfells, Ágúst

109

The Immortal Fausto: The Life, Works, and Ships of the Venetian Humanist and Naval Architect Vettor Fausto (1490-1546)  

E-Print Network [OSTI]

At the beginning of the sixteenth century, the maritime power of the Republic of Venice was seriously threatened by the Ottoman Sultan Suleiman I in the East, and by the Holy Roman Emperor Charles V in the West. In order to regain its naval power...

Campana, Lilia

2014-06-11T23:59:59.000Z

110

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

Broader source: Energy.gov (indexed) [DOE]

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

111

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

112

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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:

113

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

Broader source: Energy.gov (indexed) [DOE]

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

114

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

115

Environmental Survey preliminary report, Naval Petroleum Reserves in California (NPRC), Tupman, California  

SciTech Connect (OSTI)

This report presents the preliminary environmental findings from the first phase of the Environmental Survey of the US Department of Energy (DOE) Naval Petroleum Reserves 1 (NPR-1) and 2 (NPR-2) in California (NPRC), conducted May 9--20, 1988. The Survey is being conducted by an interdisciplinary team of environmental specialists, led 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 NPRC. The Survey covers all environmental media and all areas of environmental regulation. It is being performed in accordance with the DOE Environmental Survey Manual. The on-site phase of the Survey involved the review of existing site environmental data, observations of the operations carried on at NPRC, and interviews with site personnel. 120 refs., 28 figs., 40 tabs.

Not Available

1989-02-01T23:59:59.000Z

116

Vertical Drop of the Naval SNF Long Waste Package On Unyielding Surface  

SciTech Connect (OSTI)

The purpose of this calculation is to determine the structural response of a Naval SNF (Spent Nuclear Fuel) Long Waste Package (WP) subjected to 2 m-vertical drop on unyielding surface (US). The scope of this document is limited to reporting the calculation results in terms of maximum stress intensities. This calculation is associated with the waste package design; calculation is performed by the Waste Package Design group. AP-3.12Q, Revision 0, ICN 0, Calculations, is used to perform the calculation and develop the document. The finite element calculation is performed by using the commercially available ANSYS Version (V) 5.4 finite element code. The result of this calculation is provided in terms of maximum stress intensities.

S. Mastilovic

2006-07-21T23:59:59.000Z

117

Naval Petroleum Reserves: assessment of alternative operating strategies beyond 1982. Analysis and supporting data  

SciTech Connect (OSTI)

Legislation authorizing production from two of the Naval Petroleum Reserves, i.e., NPR-1 (Elk Hills, California) and NPR-3 (Teapot Dome, Wyoming), expires in 1982. This paper presents analyses and supporting data concerning the trade-offs of extending production or returning to a shut-in status in order to provide the Department of Energy with information needed to formulate a recommendation. The primary objective of the study is to evaluate a range of possible futures (through 1990) to determine technical, economic, energy, strategic and political trade-offs between the two options. A secondary objective is to develop a data base for use by DOE to respond to questions and issues raised by interested parties during executive branch and Congressional reviews.

Gsellman, L.R.; Mendis, M.S.; Rosenberg, J.I.

1981-06-01T23:59:59.000Z

118

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

119

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 (OSTI)

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.

Not Available

1994-06-01T23:59:59.000Z

120

Superfund record of decision (EOA Region 1): Newport Naval Education/Training Center, Newport, RI, September 1993  

SciTech Connect (OSTI)

The U.S. Naval Education and Training Center (NETC) Newport is a National Priorities List (NPL) site. There are currently four areas of contamination (AOC) and six study areas (SAs) within NETC Newport that are under investigation. This Record of Decision (ROD) relates to the presence of the existing landfill area at McAllister Point as a source of contamination. McAllister Point Landfill was the site of a sanitary landfill which operated over a 20-year period. From 1955 until the mid-1970's, the site accepted all wastes generated at the Naval complex. The landfill received waste from all operational areas (machine shops, ship repair, etc.), Navy housing areas (domestic refuse), and from the 55 ships homeported at Newport prior to 1973 (approximately fourteen 40-cubic yard containers each day). The materials disposed of at the site reportedly included spent acids, paints, solvents, waste oils (diesel, lube and fuel), and polychlorinated biphenyl (PCB)-contaminated transformer oil.

Not Available

1993-09-01T23:59:59.000Z

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.


121

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

SciTech Connect (OSTI)

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.

Not Available

1994-08-01T23:59:59.000Z

122

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

SciTech Connect (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

123

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

SciTech Connect (OSTI)

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.

NONE

1995-07-01T23:59:59.000Z

124

Endangered species and cultural resources program, Naval Petroleum Reserves in California: Annual report FY95  

SciTech Connect (OSTI)

In FY95, EG and G Energy Measurements, Inc. (EG and G/EM) continued to support efforts to protect endangered species and cultural resources at the Naval Petroleum Reserves in California (NPRC). These efforts are conducted to ensure NPRC compliance with regulations regarding the protection of listed species and cultural resources on Federal properties. Population monitoring activities are conducted annually for San Joaquin kit foxes, giant kangaroo rats, blunt-nosed leopard lizards, and Hoover`s wooly-star. To mitigate impacts of oil field activities on listed species, 674 preactivity surveys covering approximately 211 hectares (521 acres) were conducted in FY95. EG and G/EM also assisted with mitigating effects from third-party projects, primarily by conducting biological and cultural resource consultations with regulatory agencies. EG and G/EM has conducted an applied habitat reclamation program at NPRC since 1985. In FY95, an evaluation of revegetation rates on reclaimed and non-reclaimed disturbed lands was completed, and the results will be used to direct future habitat reclamation efforts at NPRC. In FY95, reclamation success was monitored on 50 sites reclaimed in 1985. An investigation of factors influencing the distribution and abundance of kit foxes at NPRC was initiated in FY94. Factors being examined include habitat disturbance, topography, grazing, coyote abundance, lagomorph abundance, and shrub density. This investigation continued in FY95 and a manuscript on this topic will be completed in FY96. Also, Eg and G/EM completed collection of field data to evaluate the effects of a well blow-out on plant and animal populations. A final report will be prepared in FY96. Finally, EG and G/EM completed a life table analysis on San Joaquin kit foxes at NPRC.

NONE

1996-04-01T23:59:59.000Z

125

Human health risk assessment for off-shore media at Portsmouth Naval Shipyard  

SciTech Connect (OSTI)

A human health risk assessment for off-shore media was performed at the Portsmouth Naval Shipyard, Kittery, Maine. The purpose was to determine whether any potential human health risks could be posed by exposures to the estuary. Included in the study were the evaluations of potential risks existing from human exposures to surface water and sediment, as well as potential risks posed by ingestion of various species of fish and shellfish which are caught commercially and recreationally in the estuary. Three species were chosen for study. They were lobsters, mussels, and flounder. The USEPA prescribed protocols for performing human health risk assessments under CERCLA and RCRA were followed to estimate risks associated with ingestion of these species caught in the lower estuary, in the vicinity of the Shipyard. USEPA required the evaluation of two potential seafood ingestion scenarios recreational fishermen and subsistence fishermen. The results indicated that the USEPA risk target of 10{sup {minus}6} for carcinogens or the hazard index of one was exceeded in at least one species for the subsistence ingestion scenario for some inorganics and organic compounds. Based on these results, it was necessary to propose Media Protection Standards in the biota, which would represent the USEPA target risk level for carcinogens and noncarcinogens, as potential cleanup targets. In performing this task, a review of regional background levels for these chemicals found in biota throughout the Great Bay Estuarine System, at locations removed from the Shipyard, was performed. Also examined were regional Maine data from the NOAA Mussel Watch Program. Biota concentrations near the Shipyard were found to be within the range of biota concentrations for most of these chemicals throughout the region, suggesting possible multiple, non-point sources for the contaminants found in seafood throughout the region.

Mahoney, E. [Eileen Mahoney Associates, Inc., Philadelphia, PA (United States)

1995-12-31T23:59:59.000Z

126

Use of microbes for paraffin cleanup at Naval Petroleum Reserve No. 3  

SciTech Connect (OSTI)

Naval Petroleum Reserve No. 3 (NPR-3), also known as Teapot Dome, is a government-owned oil field in Natrona County, Wyoming. It is an asymmetrical anticline located on the western edge of the Powder River Basin, just south of the Salt Creek Anticline. Production started in 1922, and today the field is a marginally economic stripper field with average production of less than 3 BOPD (0.5 m{sup 3}/D) per well. Total field production is about 1,800 BOPD (286 m{sup 3}/D). The Second Wall Creek Formation was waterflooded from 1979 until June 1992 with poor results due to the extensive natural fracture system in this sandstone unit. Since water injection ceased, reservoir pressure has declined to very low levels. Liquids extraction and reinjection of the gas produced from high-GOR wells along the gas-oil contact continues, but the average gas cap pressure has fallen to approximately 150 psi (1.03 MPa) from an original pressure of 1,120 psi (7.72 MPa). Since the oil is highly paraffinic, wax deposition in the hydraulic fractures and the perforations has become a serious production problem. Microbial treatment was considered as a possible low-cost solution. Four wells were selected in the Second Wall Creek Reservoir with severe paraffin problems and production rates high enough to economically justify the treatment. Problems were experienced with the production of thick oil after approximately three months. This was interpreted to be a result of previously immobile paraffin being cleaned up. A slight decrease in the decline rate was seen in the wells, although some external factors cloud the interpretation. Microbial treatments were discontinued because of marginal economics. Three of the four wells produced additional oil and had a positive incremental cash flow. Oil viscosity tests did indicate that some positive microbial thinning was occurring, and changes to the treatment procedure may potentially yield more economic results in the future.

Giangiacomo, L.; Khatib, A.

1995-12-31T23:59:59.000Z

127

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  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

128

Technical Feasibility Study for Deployment of Ground-Source Heat Pump Systems: Portsmouth Naval Shipyard -- Kittery, Maine  

SciTech Connect (OSTI)

The U.S. Environmental Protection Agency (EPA) Office of Solid Waste and Emergency Response, in accordance with the RE-Powering America's Lands initiative, engaged the U.S. Department of Energy's (DOE) National Renewable Energy Laboratory (NREL) to conduct feasibility studies to assess the viability of developing renewable energy generating facilities on contaminated sites. Portsmouth Naval Shipyard (PNSY) is a United States Navy facility located on a series of conjoined islands in the Piscataqua River between Kittery, ME and Portsmouth, NH. EPA engaged NREL to conduct a study to determine technical feasibility of deploying ground-source heat pump systems to help PNSY achieve energy reduction goals.

Hillesheim, M.; Mosey, G.

2014-11-01T23:59:59.000Z

129

Naval Petroleum Reserve No. 3 (NPR-3), Teapot Dome Field, Wyoming: Case history of the in situ combustion pilot operation  

SciTech Connect (OSTI)

Naval Petroleum Reserve No. 3 (NPR-3) is a federally owned oil field that has been in operation since 1922 and has produced more than 15 million barrels of oil since full production began in 1976. The Shannon sandstone is the shallowest and most productive of nine producing formations at NPR-3. Since only 5% of the Shannon`s estimated 144 million bbl of original oil in place (OOIP) was estimated to be recoverable by primary means, studies were undertaken in 1978 to determine the most suitable enhanced oil recovery (EOR) method which would merit a pilot test and could ultimately lead to a fieldwide application.

Sarathi, P.S.; Olsen, D.K.; Williams, C.R.

1995-02-01T23:59:59.000Z

130

Naval Research Laboratory`s programs in advanced indium phosphide solar cell development  

SciTech Connect (OSTI)

The Naval Research Laboratory has been involved in developing InP solar cell technology since 1988. The purpose of these programs was to produce advanced cells for use in very high radiation environments, either as a result of operating satellites in the Van Allen belts or for very long duration missions in other orbits. Richard Statler was technical representative on the first program, with Spire Corporation as the contractor, which eventually produced several hundred, high efficiency 2 x 2 sq cm single crystal InP cells. The shallow homojunction technology which was developed in this program enabled cells to be made with AMO, one sun efficiencies greater than 19%. Many of these cells have been flown on space experiments, including PASP Plus, which have confirmed the high radiation resistance of InP cells. NRL has also published widely on the radiation response of these cells and also on radiation-induced defect levels detected by DLTS, especially the work of Rob Walters and Scott Messenger. In 1990 NRL began another Navy-sponsored program with Tim Coutts and Mark Wanlass at the National Renewable Energy Laboratory (NREL), to develop a one sun, two terminal space version of the InP-InGaAs tandem junction cell being investigated at NREL for terrestrial applications. These cells were grown on InP substrates. Several cells with AMO, one sun efficiencies greater than 22% were produced. Two 2 x 2 sq cm cells were incorporated on the STRV lA/B solar cell experiment. These were the only two junction, tandem cells on the STRV experiment. The high cost and relative brittleness of InP wafers meant that if InP cell technology were to become a viable space power source, the superior radiation resistance of InP would have to be combined with a cheaper and more robust substrate. The main technical challenge was to overcome the effect of the dislocations produced by the lattice mismatch at the interface of the two materials.

Summers, G.P.

1995-10-01T23:59:59.000Z

131

Active control of underwater propulsor using shape memory alloys  

E-Print Network [OSTI]

of submarines10 as control surface deflection tabs and linear actuators in biomimetic hydrofoils11-12. The material chosen in many of these studies and research applications is the Shape Memory Alloy (SMA). This material is attractive due to its small size... section. The water tunnel is powered by a Baldor 25-hp electric motor and with the cross-section specified above allows for a maximum velocity of approximately 1 m/s. To be ab le to obtain reliable data from the test run of the 2-D hydrofoil...

Wasylyszyn, Jonathan Allen

2007-04-25T23:59:59.000Z

132

Propulsive performance from oscillating propulsors with spanwise flexibility  

Science Journals Connector (OSTI)

...dimensional oscillating foil propulsion. M.Eng. thesis...Bose, N. 1991 Propulsion from an oscillating...planform. In Proc. Marine Dynamics Conf. 1991...Hydromechanics of swimming propulsion. Part 1. Swimming...Canada, Institute of Marine Dynamics report, no...

1997-01-01T23:59:59.000Z

133

EIS-0020: Crude Oil Transport Alternate From Naval Petroleum Reserve No. 1 Elk Hills/SOHIO Pipeline Connection Conveyance System, Terminal Tank Farm Relocation to Rialto, California  

Broader source: Energy.gov [DOE]

The Office of Naval Petroleum and Oil Shale Reserves developed this supplemental statement to evaluate the environmental impacts associated with a modified design of a proposed 250,000 barrels per day crude oil conveyance system from Navel Petroleum Reserve No. 1 to connect to the proposed SOHIO West Coast to Midcontinent Pipeline at Rialto, California. This SEIS is a supplement to DOE/EIS-0020, Crude Oil Transport Alternate From Naval Petroleum Reserve No. 1 Elk Hills/SOHIO Pipeline Connection Conveyance System, Terminal Tank Farm Relocation to Rialto, California.

134

Jordan Form Numerical. . .  

E-Print Network [OSTI]

Similarity Jordan Form Numerical. . . Applications Proofs Basis change A short proof Home Page, Alabama, USA Oct 3, 2007 Jordan Normal Form Revisited Speaker: Tin-Yau Tam Graduate Student Seminar tamtiny@auburn.edu #12;Similarity Jordan Form Numerical. . . Applications Proofs Basis change A short

Tam, Tin-Yau

135

EA-1956: Site-Wide Environmental Assessment for the Divestiture of Rocky Mountain Oilfield Testing Center and Naval Petroleum Reserve No. 3, Natrona County, Wyoming  

Broader source: Energy.gov [DOE]

Draft Site-Wide EA: Public Comment Period Ends 04/14/2014DOE is preparing an EA to assess potential environmental impacts of the proposed discontinuation of DOE operations at, and the proposed divestiture of, the Rocky Mountain Oilfield Testing Center (RMOTC) and Naval Petroleum Reserve Number 3 (NPR-3).

136

LAB #8 Numerical Methods  

E-Print Network [OSTI]

Required tools: Matlab routine dfield ; numerical routines eul, rk2, rk4; m-files. Discussion ... You should get a piecewise linear graph made up .... in the matrix y

2005-10-20T23:59:59.000Z

137

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

Broader source: Energy.gov (indexed) [DOE]

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

138

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

E-Print Network [OSTI]

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...

Campana, Lilia 1975-

2010-12-06T23:59:59.000Z

139

Numerical study of unsteady, thermally stratified flow in an idealized thermoacoustic stack  

Science Journals Connector (OSTI)

A computational model for the simulation of unsteady thermally stratified flow within an idealized thermoacoustic stack is developed. The model is based on a vorticity?based formulation of the low?Mach?number conservation equations. The numerical scheme combines fast Poisson solvers with domain decomposition/boundary Green’s?function techniques. The model is applied to analyze the response of the stack to imposed finite?amplitude acoustic oscillations. Computed results are used to visualize the essential features of the vorticity field and temperature distribution quantify the heat transfer between the gas and plates and analyze thermal and mechanical energy losses. [The work of A.S.W. and O.M.K. is supported by the Office of Naval Research. R.K. is partially supported by Deutsche Forschungsgemeinschaft (DFG).

Aniruddha S. Worlikar; Omar M. Knio; Rupert Klein

1996-01-01T23:59:59.000Z

140

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  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

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

Accident Investigation of the June 17, 2012, Construction Accident- Structural Steel Collapse at The Over pack Storage Expansion #2 at the Naval Reactors Facility at the Idaho National Laboratory, Idaho Falls, Idaho  

Broader source: Energy.gov [DOE]

This report documents the Naval Reactors investigation into the collapse ofa partially-erected spent fuel storage building, Overpack Storage Expansion #2 (OSE2), at the Naval Reactors Facility. The Accident Investigation Board inspected the scene, collected physical and photographic evidence, interviewed involved personnel, and reviewed relevant documents to determine the key causes of the accident. Based on the information gathered during the investigation, the Board identified several engineering and safety deficiencies that need to be addressed to prevent recurrence.

142

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

SciTech Connect (OSTI)

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.

Not Available

1991-08-01T23:59:59.000Z

143

Analysis of the potential for enhanced oil recovery in the Shannon Formation at Naval Petroleum Reserve Number 3. Master's thesis  

SciTech Connect (OSTI)

Three EOR processes were evaluated for potential application in the Shannon reservoir at Naval Petroleum Reserve No. 3, in the Teapot Dome Oilfield near Casper, Wyoming. This reservoir is estimated to have originally held 180 million barrels of oil, of which only 8 million barrels are recoverable by primary means. Simplified computer models were used to predict the performance of in-situ combustion, polymer flooding, and steam flooding. Economic analyses were done on the results of these predictions and sensitivity studies were performed for various physical and economic parameters. This report provides a foundation of information, offers a template for economic decisions, and makes preliminary recommendations based on performance predictions. Before field-wide application of any project is undertaken, a better characterization of the reservoir must be accomplished and pilot projects evaluated. However, this analysis suggest that the most favorable application in the Shannon Sandstone is polymer flooding operated on 2.5-acre spacing. This technique is predicted to give a net present value of $5.43 million per 10-acre unit with a present value ration of 9.4 for its four year economic life.

Chappelle, H.H.

1985-05-01T23:59:59.000Z

144

Numerical control user experience  

SciTech Connect (OSTI)

AUTOCON is an acronym for Automatic Contouring, a program which generates a contour toolpath for the external profile of printed writing boards (PWB) using ICEM DDN. AUTOCON originates from the Computer Aided Process Planning (CAPP) Procedure developed by Electrical Manufacturing at Allied Bendix. The CAPP program uses electronically transmitted graphics files received from a design agency to generate automatic panel layouts and travellers for Process Engineers. The objective of AUTOCON is to utilize the information from the CAPP program to generate Numerical Control tapes. If the CAPP program can be utilized to its full potential, it is estimated that a good portion of the 60 to 90 PWB tapes shipped each month from our Numerical Control Department could be eliminated from conventional N/C Programming. The purpose of AUTOCON is to automatically generate a toolpath around the external profile of a PWB with no user intervention. The Process Engineer can generate a profile contour N/C tape after he has completed the panel layout and traveller through CAPPS for a part. After the layout and traveller illustrations have been completed, the same geometry can then be utilized again for the N/C tape. An N/C Analysist then reviews the listing for a final checkout of the job. 13 figs.

Butler, J.

1985-10-01T23:59:59.000Z

145

Joint environmental assessment for western NPR-1 3-dimensional seismic project at Naval Petroleum Reserve No. 1, Kern County, California  

SciTech Connect (OSTI)

The Department of Energy (DOE), in conjunction with the Bureau of Land Management (BLM), has prepared an Environmental Assessment (DOE/EA-1124) to identify and evaluate the potential environmental impacts of the proposed geophysical seismic survey on and adjacent to the Naval Petroleum Reserve No.1 (NPR-1), located approximately 35 miles west of Bakersfield, California. NPR-1 is jointly owned and operated by the federal government and Chevron U.S.A. Production Company. The federal government owns about 78 percent of NPR-1, while Chevron owns the remaining 22 percent. The government`s interest is under the jurisdiction of DOE, which has contracted with Bechtel Petroleum Operations, Inc. (BPOI) for the operation and management of the reserve. The 3-dimensional seismic survey would take place on NPR-1 lands and on public and private lands adjacent to NPR-1. This project would involve lands owned by BLM, California Department of Fish and Game (CDFG), California Energy Commission (CEC), The Nature Conservancy, the Center for Natural Lands Management, oil companies (Chevron, Texaco, and Mobil), and several private individuals. The proposed action is designed to provide seismic data for the analysis of the subsurface geology extant in western NPR-1 with the goal of better defining the commercial limits of a currently producing reservoir (Northwest Stevens) and three prospective hydrocarbon bearing zones: the {open_quotes}A Fan{close_quotes} in Section 7R, the 19R Structure in Section 19R, and the 13Z Structure in Section 13Z. Interpreting the data is expected to provide NPR-1 owners with more accurate locations of structural highs, faults, and pinchouts to maximize the recovery of the available hydrocarbon resources in western NPR-1. Completion of this project is expected to increase NPR-1 recoverable reserves, and reduce the risks and costs associated with further exploration and development in the area.

NONE

1996-05-01T23:59:59.000Z

146

Stephanie von Numers | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Stephanie von Numers About Us Stephanie von Numers - Communications and Web Coordinator, Education & Workforce Development Stephanie von Numers joined the U.S. Department of...

147

Midwest Numerical Analysis Day 2011  

E-Print Network [OSTI]

Group Photos: Link. The 2011 Midwest Numerical Analysis Day ... (Free parking across street during the weekend). The organizers are Jie Shen (Chair), Peijun ...

148

Numerical Modeling of HCCI Combustion  

Broader source: Energy.gov (indexed) [DOE]

Numerical Modeling of HCCI Combustion Salvador M. Aceves, Daniel L. Flowers, J. Ray Smith, Joel Martinez-Frias, Francisco Espinosa-Loza, Tim Ross, Bruce Buchholz, Nick...

149

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

150

Tag: Naval Reactors  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

152

Institution of Naval Architects  

Science Journals Connector (OSTI)

... H. C. Anstey for papers, respectively, on the resistance of thin plates and models in a current of water, and on the application of internal-combustion ... in a current of water, and on the application of internal-combustion engines for marine propulsion. Thirteen papers in all were presented at the meetings, abstracts from ...

1910-03-24T23:59:59.000Z

153

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

SciTech Connect (OSTI)

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

154

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)  

Broader source: Energy.gov (indexed) [DOE]

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

155

Adjoint Sensitivity Analysis for Numerical Weather Prediction  

E-Print Network [OSTI]

Sep 2, 2011 ... Adjoint Sensitivity Analysis for Numerical Weather Prediction: Applications to ... weather variables using numerical weather prediction models.

Alexandru Cioaca

2011-09-02T23:59:59.000Z

156

NUMERICAL VERIFICATION OF EQUILIBRIUM CHEMISTRY  

SciTech Connect (OSTI)

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

157

Numerical simulation of hydraulic fracturing  

E-Print Network [OSTI]

NUMERICAL SIMULATION OF HYDRAULIC FRACTURING A Thesis by JOSEPH BARNES WARNER Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May 1987 Maj or Subj ect...: Petroleum Engineering NUMERICAL SIMULATION OF HYDRAULIC FRACTURING A Thesis by JOSEPH BARNES WARNER Approved as to style and content by: S. A. Holditch (Chairman of Committee) D. D. Van Fleet (member) J. E. Russell (m be ) W. D. Von onten ( ead...

Warner, Joseph Barnes

2012-06-07T23:59:59.000Z

158

Determination of naval medium speed diesel engine air exhaust emissions and validation of a proposed estimation model. Master`s thesis  

SciTech Connect (OSTI)

Steady state marine diesel engine exhaust emissions are being reviewed by the Environmental Protection Agency for possible regulation. In anticipation of future regulation, the United States Navy is developing appropriate emissions models for naval vessels. A procedure for collecting this data from an U. S. Navy ship with medium speed main propulsion diesels is presented. It is based on similar testing conducted by the U.S. Coast Guard for measuring patrol boat diesel engine emissions and International Standards Organization methodology. The primary challenge of the experiment design was to minimize interference with the engineering plant as the assigned ship was concurrently tasked for other operations. Data gathered allowed calculation of engine rpm, engine load, exhaust gas flow rate, and determination of pollutant amounts. The tests were conducted at a series of predetermined speeds to reflect an 11-Mode duty cycle developed previously for the LSD 41 Class propulsion diesel engines.

Mayeaux, A.M.

1995-05-01T23:59:59.000Z

159

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING Int. J. Numer. Meth. Engng. 2000; 47:15691603  

E-Print Network [OSTI]

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING Int. J. Numer. Meth. Engng. 2000; 47:1569­1603

Thompson, Lonny L.

160

Numerical Modelling of Interaction between  

E-Print Network [OSTI]

plasma in arc furnace used in toxic waste destruction Plasma etching semiconductor High intensity arc lamp Electrode temperature after 1ms of arcing with power density of 3x109 W.m-2 Electrode temperatureNumerical Modelling of Interaction between the Electric Arc and Electrodes Principal researcher: W

Sóbester, András

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

ALGEBRAIC AND NUMERICAL ALGORITHMS 1  

E-Print Network [OSTI]

ALGEBRAIC AND NUMERICAL ALGORITHMS 1 Ioannis Z. Emiris National Kapodistrian University of Athens as manipulation with truncated series and algebraic sets. Such problems can be solved based on the error by employing various nontrivial computational techniques such as the Euclidean algorithm and continuous

Tsigaridas, Elias

162

ALGEBRAIC AND NUMERICAL ALGORITHMS1  

E-Print Network [OSTI]

ALGEBRAIC AND NUMERICAL ALGORITHMS1 Ioannis Z. Emiris National Kapodistrian University of Athens as manipulation with truncated series and algebraic sets. Such problems can be solved based on the error by employing various nontrivial computational techniques such as the Euclidean algorithm and continuous

Tsigaridas, Elias

163

Naval Petroleum and Oil Shale Reserve. Hearing before the Subcommittee on Preparedness of the Committee on Armed Services, United States Senate, Ninety-Eighth Congress, First Session on S. 1810, September 29, 1983  

SciTech Connect (OSTI)

Captain Myron E. Smith, Jr., Director of the DOE Office of Naval Petroleum and Oil Shale Reserves, testified at a hearing on S. 1810, which authorizes funds relating to the petroleum and oil shale reserves. Smith reviewed revenues and expenditures since legislation was passed in 1976, noting that production at Elk Hills and Teapot Dome are at peak levels, in his justification of the budget request of $266.1 million. Questions from the committee and Smith's responses follow his formal testimony.

Not Available

1984-01-01T23:59:59.000Z

164

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 (OSTI)

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.

NONE

1996-12-01T23:59:59.000Z

165

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 (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, 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.

NONE

1994-12-31T23:59:59.000Z

166

Disruptive Innovation in Numerical Hydrodynamics  

SciTech Connect (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

167

Numerical Simulations of Bouncing Jets  

E-Print Network [OSTI]

Bouncing jets are fascinating phenomenons occurring under certain conditions when a jet impinges on a free surface. This effect is observed when the fluid is Newtonian and the jet falls in a bath undergoing a solid motion. It occurs also for non-Newtonian fluids when the jets falls in a vessel at rest containing the same fluid. We investigate numerically the impact of the experimental setting and the rheological properties of the fluid on the onset of the bouncing phenomenon. Our investigations show that the occurrence of a thin lubricating layer of air separating the jet and the rest of the liquid is a key factor for the bouncing of the jet to happen. The numerical technique that is used consists of a projection method for the Navier-Stokes system coupled with a level set formulation for the representation of the interface. The space approximation is done with adaptive finite elements. Adaptive refinement is shown to be very important to capture the thin layer of air that is responsible for the bouncing.

Bonito, Andrea; Lee, Sanghyun

2015-01-01T23:59:59.000Z

168

Numerical simulation of electrokinetically driven micro flows  

E-Print Network [OSTI]

Spectral element based numerical solvers are developed to simulate electrokinetically driven flows for micro-fluidic applications. Based on these numerical solvers, basic phenomena and devices for electrokinetic applications in micro and nano flows...

Hahm, Jungyoon

2005-11-01T23:59:59.000Z

169

Numerical study on active wave devouring propulsion  

Science Journals Connector (OSTI)

The possibility of extracting energy from gravity waves for marine propulsion was numerically studied by a two-dimensional...

Liyanarachchi Waruna Arampath De Silva…

2012-09-01T23:59:59.000Z

170

turbulent heat International Journal of Numerical  

E-Print Network [OSTI]

Enhanced turbulent heat transfer 47 International Journal of Numerical Methods for Heat & Fluid, Hsinchu,Taiwan Keywords Heat transfer, Fluids, Flow, Turbulence, Numerical methods Abstract This study evaluates low Reynolds number models of turbulence for numerical computations on the heat transfer and fluid

Lin, Wen-Wei

171

Satellite Application Facility for Numerical Weather Prediction  

E-Print Network [OSTI]

NWP SAF Satellite Application Facility for Numerical Weather Prediction Document NWPSAF-KN-VS-002 Stoffelen KNMI #12;NWP SAF Satellite Application Facility for Numerical Weather Prediction Report of the EUMETSAT Satellite Application Facility on Numerical Weather Prediction (NWP SAF), under the Cooperation

Stoffelen, Ad

172

Amending Numerical Weather Prediction forecasts using GPS  

E-Print Network [OSTI]

. Satellite images and Numerical Weather Prediction (NWP) models are used together with the synoptic surfaceAmending Numerical Weather Prediction forecasts using GPS Integrated Water Vapour: a case study to validate the amounts of humidity in Numerical Weather Prediction (NWP) model forecasts. This paper presents

Stoffelen, Ad

173

Results of analyses of fur samples from the San Joaquin Kit Fox and associated soil and water samples from the Naval Petroleum Reserve No. 1, Tupman, California  

SciTech Connect (OSTI)

The purpose of this study was to determine whether analysis of the elemental content of fur from San Joaquin kit foxes (Vulpes macrotis mutica) and of water and soil from kit fox habitats could be used to make inferences concerning the cause of an observed decline in the kit fox population on Naval Petroleum Reserve No. 1 (NPR-1). Fur samples that had been collected previously from NPR-1, another oil field (NPR-2), and two sites with no oil development were subjected to neutron activation analysis. In addition, soil samples were collected from the home ranges of individual foxes from undisturbed portions of major soil types on NPR-1 and from wastewater samples were collected from tanks and sumps and subjected to neutron activation analysis. Most elemental concentrations in fur were highest at Camp Roberts and lowest on the undeveloped portions of NPR-I. Fur concentrations were intermediate on the developed oil fields but were correlated with percent disturbance and with number of wells on NPR-1 and NPR-2. The fact that most elements covaried across the range of sites suggests that some pervasive source such as soil was responsible. However, fur concentrations were not correlated with soft concentrations. The kit foxes on the developed portion of NPR-1 did not have concentrations of elements in fur relative to other sites that would account for the population decline in the early 1980s. The oil-related elements As, Ba, and V were elevated in fox fur from oil fields, but only As was sufficiently elevated to suggest a risk of toxicity in individual foxes. However, arsenic concentrations suggestive of sublethal toxicity were found in only 0.56% of foxes from developed oil fields, too few to account for a population decline.

Suter, G.W. II; Rosen, A.E.; Beauchamp, J.J. [Oak Ridge National Lab., TN (United States); Kato, T.T. [EG and G Energy Measurements, Inc., Tupman, CA (United States)

1992-12-01T23:59:59.000Z

174

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

SciTech Connect (OSTI)

The Secretary of Energy is authorized to produce the Naval Petroleum Reserves No. 3 (NPR-3) at its maximum efficient rate (MER) consistent with sound engineering practices, for a period extending to April 5, 2000 subject to extension. Production at NPR-3 peaked in 1981 and has declined since until it has become a mature stripper field, with the average well yielding less than 2 barrels per day. The Department of Energy (DOE) has decided to discontinue Federal operation of NPR-3 at the end of its life as an economically viable oilfield currently estimated to be 2003. Although changes in oil and gas markets or shifts in national policy could alter the economic limit of NPR-3, it productive life will be determined largely by a small and declining reserve base. DOE is proposing certain activities over the next six years in anticipation of the possible transfer of NPR-3 out of Federal operation. These activities would include the 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 continued development of the Rocky Mountain Oilfield Testing Center (RMOTC). DOE has prepared this environmental assessment that analyzes the proposed plugging and abandonment of wells, field restoration and development of RMOTC. Based on the analysis in the EA, the DOE finds that the proposed action is not a major Federal action significantly affecting the quality of the human environment within the meaning of the National Environmental Policy Act of 1969 (NEPA). The preparation of an environmental impact statement is not required, and DOE is issuing this Finding of No Significant Impact (FONSI).

NONE

1998-04-01T23:59:59.000Z

175

DESIGN AND PERFORMANCE OF A FISH FIN-LIKE PROPULSOR FOR AUVS George V. Lauder1  

E-Print Network [OSTI]

for AUVs based on the mechanical design and performance of fish fins. II. THE SUNFISH MODEL SYSTEM Bluegill are able to execute highly effective yaw maneuvers using only their pectoral fins, and at speeds of less

Lauder, George V.

176

MEMORANDUM OF UNDERSTANDING Between The Numerical Algorithms...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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...

177

Numerical Investigations of Magnetohydrodynamic Hypersonic Flows.  

E-Print Network [OSTI]

??Numerical simulations of magnetohydrodynamic (MHD) hypersonic flow are presented for both laminar and turbulent flow over a cylinder and flow entering a scramjet inlet. ANSYS… (more)

Guarendi, Andrew N

2013-01-01T23:59:59.000Z

178

Numerical Investigation of Advanced Compressor Technologies ...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

technologies to support clean diesel combustion, such as HCCILTC applications. deer08sun.pdf More Documents & Publications Numerical Investigation of Advanced Compressor...

179

RESOURCES IN NUMERICAL ANALYSIS Kendall E. Atkinson  

E-Print Network [OSTI]

. Iterative methods 4. Applications on parallel and vector computers 5. Over-determined linear systems. B numerical analysis while also discussing more briefly the resources associated with the computer science of most numerical analysis research is to develop actual computer codes to solve real problems; and thus

Atkinson, Kendall

180

Toward Practical Aerodynamic Design Through Numerical Optimization  

E-Print Network [OSTI]

Toward Practical Aerodynamic Design Through Numerical Optimization David W. Zingg, and Laura6, Canada A Newton-Krylov algorithm for aerodynamic optimization is applied to the multipoint design aerodynamic design. I. Introduction Beginning with the work of Hicks et al.1 and Hicks and Henne,2 numerical

Zingg, David W.

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

Using MATLAB to solve differential equations numerically  

E-Print Network [OSTI]

Using MATLAB to solve differential equations numerically Morten Brøns Department of Mathematics of the programming language MATLAB. We will focus on practical matters and readers interested in numerical analysis as a mathematical subject should look elsewhere. In the G-databar at DTU, MATLAB can be accessed either by typing �

Klein, David

182

Threedimensional numerical simulation for various geometries  

E-Print Network [OSTI]

Three­dimensional numerical simulation for various geometries of solid oxide fuel cells J.R. Ferguson 1 , J.M. Fiard 2 , and R. Herbin 3 Abstract A 3D mathematical model of a Solid Oxide Fuel Cell modelling and numerical simulation of natural gas­fed solid oxide cells (Solid Oxide Fuel Cell, SOFC

Herbin, Raphaèle

183

Numerical Simulation of Cooling Gas Injection Using  

E-Print Network [OSTI]

Numerical Simulation of Cooling Gas Injection Using Adaptive Multiscale Techniques Wolfgang Dahmen: finite volume method, film cooling, cooling gas injection, multiscale techniques, grid adaptation AMS@igpm.rwth-aachen.de (Thomas Gotzen) #12;Numerical simulation of cooling gas injection using adaptive multiscale techniques

184

NAVAL POSTGRADUATE SCHOOL Monterey, California  

E-Print Network [OSTI]

-dimensional ship model images and real images derived from video of an AN/AAS-44V Forward Looking Infrared (FLIR

Rowe, Neil C.

185

The Institution of Naval Architects  

Science Journals Connector (OSTI)

... shown that more heat is absorbed in the fire-box with flaming material than with flameless coke. It is well known that a luminous flame radiates more heat than one ...

1890-04-03T23:59:59.000Z

186

NAVAL POSTGRADUATE SCHOOL Monterey, California  

E-Print Network [OSTI]

, Monterey, CA 93943 10. SPONSORING / MONITORING AGENCY REPORT NUMBER 11. SUPPLEMENTARY NOTES The views Generation (MM5) as the atmospheric component was developed for the east Asian marginal seas (EAMS verified against surface wind data from the National Centers for Environmental Prediction (NCEP) and sea

Chu, Peter C.

187

The Institution of Naval Architects  

Science Journals Connector (OSTI)

... Henderson on the elasticity of ships as deduced from experiments on the vibration of dynamical models. A dynamical ... . A dynamical model of the ship is constructed out of a bar of steel of uniform thickness and ...

1909-04-08T23:59:59.000Z

188

The Institution of Naval Architects  

Science Journals Connector (OSTI)

... , a similar ship in all respects, excepting that she has ordinary crank and cylinder engines. As is well known, the steam turbine is less "flexible,"to use an ... is less "flexible,"to use an expression that has come into use, than the reciprocating ...

1905-04-20T23:59:59.000Z

189

The Institution of Naval Architects  

Science Journals Connector (OSTI)

... to arrange for holding regular autumnal sessions at the principal outports, in addition to the spring sessions in London. The papers read were chiefly "papers of information,"having a ... well received. His recent paper tf On the Theoretical Duty of Heat in the Steam-Engine"was probably understood by only a few of his hearers; and Prof. Cotterill, ...

W. H. W.

1885-04-09T23:59:59.000Z

190

In-shock cooling in numerical simulations  

Science Journals Connector (OSTI)

......especially interested in the production of molecular hydrogen, and so we follow the...hydrodynamics|shock waves|methods: numerical| 1 Introduction...the rate of molecular hydrogen (H2) and hydrogen-deuterium (HD) production. These two molecules......

Roger M. Hutchings; Peter A. Thomas

2000-12-11T23:59:59.000Z

191

Sandia National Laboratories: Numerical Manufacturing And Design...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

NuMAD (Numerical Manufacturing And Design) is an open-source software tool written in Matlab which simplifies the process of creating a three-dimensional model of a wind turbine...

192

Numerical Simulation of Surfactant-Polymer Flooding  

Science Journals Connector (OSTI)

We propose a mathematical model (numerical simulation) of surfactant-polymer flooding for a three-phase six-component system. ... model takes into account various phenomena inherent to flooding, the effect of sur...

Baoguang Jin; Hanqiao Jiang; Xiansong Zhang…

2014-03-01T23:59:59.000Z

193

Distributed Numerical Weather Prediction via Satellite  

Science Journals Connector (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

194

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

195

Property description and fact-finding report for NPR-3 Natrona County, Wyoming. Addendum to 22 August 1996 study of alternatives for future operations of the naval petroleum and oil shale reserves NPR-3  

SciTech Connect (OSTI)

The U.S. Department of Energy has asked Gustavson Associates, Inc. to serve as an Independent Petroleum Consultant under contract DE-AC01-96FE64202. This authorizes a study and recommendations regarding future development of Naval Petroleum Reserve No. 3 (NPR-3) in Natrona County, Wyoming. The report that follows is the Phase I fact-finding and property description for that study. The United States of America owns 100 percent of the mineral rights and surface rights in 9,321-acre NPR-3. This property comprises the Teapot Dome oil field and related production, processing and other facilities. Discovered in 1914, this field has 632 wells producing 1,807 barrels of oil per day. Production revenues are about $9.5 million per year. Remaining recoverable reserves are approximately 1.3 million barrels of oil. Significant plugging and abandonment (P&A) and environmental liabilities are present.

NONE

1997-05-01T23:59:59.000Z

196

Numerical Modeling of Acoustic Timescale Detonation Initiation Using the Adaptive  

E-Print Network [OSTI]

Numerical Modeling of Acoustic Timescale Detonation Initiation Using the Adaptive Wavelet 2008 #12;This thesis entitled: Numerical Modeling of Acoustic Timescale Detonation Initiation Using. (Ph.D.) Numerical Modeling of Acoustic Timescale Detonation Initiation Using the Adaptive Wavelet

Vasilyev, Oleg V.

197

High performance computing and numerical modelling  

E-Print Network [OSTI]

Numerical methods play an ever more important role in astrophysics. This is especially true in theoretical works, but of course, even in purely observational projects, data analysis without massive use of computational methods has become unthinkable. The key utility of computer simulations comes from their ability to solve complex systems of equations that are either intractable with analytic techniques or only amenable to highly approximative treatments. Simulations are best viewed as a powerful complement to analytic reasoning, and as the method of choice to model systems that feature enormous physical complexity such as star formation in evolving galaxies, the topic of this 43rd Saas Fee Advanced Course. The organizers asked me to lecture about high performance computing and numerical modelling in this winter school, and to specifically cover the basics of numerically treating gravity and hydrodynamics in the context of galaxy evolution. This is still a vast field, and I necessarily had to select a subset ...

,

2014-01-01T23:59:59.000Z

198

Developments in Petroleum Science, 6 FUNDAMENTALS OF NUMERICAL  

E-Print Network [OSTI]

Developments in Petroleum Science, 6 FUNDAMENTALS OF NUMERICAL RESERVOIR SIMULATION DONALD WCongressCatalogingin PublicationData Peaceman, Donald W Fundamentals of numerical reservoir simulation. (develrpents in petroleum

Santos, Juan

199

SciTech Connect: Development of Numerical Simulation Capabilities...  

Office of Scientific and Technical Information (OSTI)

Development of Numerical Simulation Capabilities for In Situ Heating of Oil Shale Citation Details In-Document Search Title: Development of Numerical Simulation Capabilities for In...

200

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.

Note: This page contains sample records for the topic "numerous naval propulsor" from the National Library of EnergyBeta (NLEBeta).
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201

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS Int. J. Numer. Meth. Fluids 2012; 68:377402  

E-Print Network [OSTI]

exhibit similarity in terms of various error metrics to the full 4D Var results, but are obtained using of its extension to operational 3-D numerical weather prediction models. Copyright 2011 John Wiley & Sons complicated Numerical Weather Prediction (NWP) models. Therefore, derivation and testing of various algorithms

Navon, Michael

202

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS Int. J. Numer. Meth. Fluids 31: 345358 (1999)  

E-Print Network [OSTI]

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS Int. J. Numer. Meth. Fluids 31: 345­358 (1999 AND S. ROYc,3 a Engineering Science Program, MAES Department, 316A Perkins Hall, Uni6ersity of Tennessee Corporation, Burr Ridge, IL, USA SUMMARY The quest continues for accurate and efficient computational fluid

Roy, Subrata

203

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING Int. J. Numer. Meth. Biomed. Engng. 2014; 30:15971613  

E-Print Network [OSTI]

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING Int. J. Numer. Meth. Biomed BIOMEDICAL ENGINEERING 2013 A finite strain nonlinear human mitral valve model with fluid. © 2014 The Authors. International Journal for Numerical Methods in Biomedical Engineering published

Luo, Xiaoyu

204

A Numerical Method for Extended Boussinesq  

E-Print Network [OSTI]

A Numerical Method for Extended Boussinesq Shallow-Water Wave Equations by Mark Andrew Walkley and diffraction, and nonlinear wave interactions such as the generation of harmonic waves. The Boussinesq, shallow water envi- ronment. There are a variety of Boussinesq-type mathematical models

Walkley, Mark

205

NUMERICAL INVESTIGATION OF A TWODIMENSIONAL BOUSSINESQ SYSTEM  

E-Print Network [OSTI]

NUMERICAL INVESTIGATION OF A TWO­DIMENSIONAL BOUSSINESQ SYSTEM MIN CHEN Department of Mathematics, Purdue University, West Lafayette, IN 47907, USA Keywords: water wave, Boussinesq system, Legendre problems of a two­dimensional Boussinesq system which describes three­dimensional water waves over a moving

Chen, Min

206

Numerical approach to the nuclear deformation energy  

E-Print Network [OSTI]

A numerical method close to the Strutinsky procedure (but better) is proposed to calculate the deformation energy of nuclei. Quadrupole (triaxial) deformations are considered. Theoretical as well as practical aspects of the method are reviewed in this paper. A complete fortran program illustrates the feasibility of the method.

B. Mohammed-Azizi

2010-02-20T23:59:59.000Z

207

Random Matrix Theory, Numerical Computation and Applications  

E-Print Network [OSTI]

a precursor to a book on Random Matrix Theory that will be forthcoming. We reserve the right to reuseRandom Matrix Theory, Numerical Computation and Applications Alan Edelman, Brian D. Sutton new approaches to theory. We illustrate by describing such random matrix techniques as the stochastic

Edelman, Alan

208

On Aerodynamic Design Through Multipoint Numerical Optimization  

E-Print Network [OSTI]

On Aerodynamic Design Through Multipoint Numerical Optimization Howard P. Buckley, and David WT6, Canada A multipoint optimization approach is used to solve aerodynamic design problems en integral as an objective function is demonstrated to improve aerodynamic performance over a range of on

Zingg, David W.

209

Comparing Aerodynamic Models for Numerical Simulation of  

E-Print Network [OSTI]

Comparing Aerodynamic Models for Numerical Simulation of Dynamics and Control of Aircraft and simulation of aircraft, yet other aerodynamics models exist that can provide more accurate results for certain simulations without a large increase in computational time. In this paper, sev- eral aerodynamics

Peraire, Jaime

210

Numerical Models of Extragalactic Radio Sources  

Science Journals Connector (OSTI)

...unpublished data. THOMPSON, A...unpublished data. Numerical models...observatories provided an infrastructure that resulted in high-quality data for both the expert...on an Eulerian grid in time and space...magnetic field is a hybrid of the constrained...

JACK O. BURNS; MICHAEL L. NORMAN; DAVID A. CLARKE

1991-08-02T23:59:59.000Z

211

NUMERICAL DESIGN TOOLS FOR THERMAL REPLICATION OF  

E-Print Network [OSTI]

by heating Ceramic block Glass workpiece before heating Figure 1: Thermal Replication (after Smith et al. [14NUMERICAL DESIGN TOOLS FOR THERMAL REPLICATION OF OPTICAL­QUALITY SURFACES Y.M. Stokes 1 Department. #12; Thermal replication of optical surfaces 1 1 Introduction Thermal replication is an industrial

Stokes, Yvonne

212

Numerical Analysis by L. Ridgway Scott  

E-Print Network [OSTI]

-dimensional spaces, i.e. square matrices. This chapter is mainly about matrix norms, their relationshipReview of Numerical Analysis by L. Ridgway Scott Princeton University Press, 2011 David S. Watkins as a mathematical subject. Scott wishes to reverse this trend, so he has written a text in which the mathematics

213

Results Matter. Trust NAG. Numerical Algorithms Group  

E-Print Network [OSTI]

performance Using NAG Numerical Software via C, C++, Excel, Fortran, MATLAB & other environments LTCC John Toolbox for MATLAB Fortran Builder (NAG's New Windows Fortran Compiler) #12;London Universities - 1st collaborative projects ­ e.g. CSE Support to the UK's largest supercomputer, HECToR #12;London Universities - 1

Burton, Geoffrey R.

214

GPU Acceleration of Numerical Weather John Michalakes  

E-Print Network [OSTI]

GPU Acceleration of Numerical Weather Prediction John Michalakes National Center for Atmospheric parallelism will prove ineffective for many scenarios. We present an alternative method of scaling model Exponentially increasing processor power has fueled fifty years of continuous improvement in weather and climate

Colorado at Boulder, University of

215

BIT Numerical Mathematics 2005, to appear  

E-Print Network [OSTI]

. AKRIVIS AND S. LARSSON This system models the electric heating of a conductive body, with u being­DEPENDENT JOULE HEATING PROBLEM # G. AKRIVIS 1+ and S. LARSSON 2 June 27, 2005 1 Computer Science Department@chalmers.se Abstract. Completely discrete numerical methods for a nonlinear elliptic­parabolic system, the time

Larsson, Stig

216

BIT Numerical Mathematics 2005, to appear  

E-Print Network [OSTI]

the electric heating of a conductive body, with u being the temperature, the electric potential-DEPENDENT JOULE HEATING PROBLEM G. AKRIVIS1 and S. LARSSON2 June 27, 2005 1 Computer Science Department@chalmers.se Abstract. Completely discrete numerical methods for a nonlinear elliptic-parabolic system, the time

Larsson, Stig

217

Presented by High Fidelity Direct Numerical  

E-Print Network [OSTI]

Presented by High Fidelity Direct Numerical Simulations of Turbulent Combustion Jacqueline H. Chen (PI), Chun Sang Yoo, Gaurav Bansal, Hongfeng Yu, Ajith Mascarenhas Combustion Research Facility Sandia) of turbulent combustion DNS approach and role � Fully resolve all continuum scales without using subgrid models

218

Parallel Worldline Numerics: Implementation and Error Analysis  

E-Print Network [OSTI]

We give an overview of the worldline numerics technique, and discuss the parallel CUDA implementation of a worldline numerics algorithm. In the worldline numerics technique, we wish to generate an ensemble of representative closed-loop particle trajectories, and use these to compute an approximate average value for Wilson loops. We show how this can be done with a specific emphasis on cylindrically symmetric magnetic fields. The fine-grained, massive parallelism provided by the GPU architecture results in considerable speedup in computing Wilson loop averages. Furthermore, we give a brief overview of uncertainty analysis in the worldline numerics method. There are uncertainties from discretizing each loop, and from using a statistical ensemble of representative loops. The former can be minimized so that the latter dominates. However, determining the statistical uncertainties is complicated by two subtleties. Firstly, the distributions generated by the worldline ensembles are highly non-Gaussian, and so the standard error in the mean is not a good measure of the statistical uncertainty. Secondly, because the same ensemble of worldlines is used to compute the Wilson loops at different values of $T$ and $x_\\mathrm{ cm}$, the uncertainties associated with each computed value of the integrand are strongly correlated. We recommend a form of jackknife analysis which deals with both of these problems.

Dan Mazur; Jeremy S. Heyl

2014-07-28T23:59:59.000Z

219

A numerical tool for transmission lines  

Science Journals Connector (OSTI)

The electric line numerical study is usually made through a harmonic approach with the impedance concept based on the Finite Difference discretization in both the time and space domains. These methods present severe drawbacks when used in impulse working ... Keywords: differential system, finite element method, impulse voltage, stiff time problem, transmission line

Hervé Bolvin; André Chambarel; Philippe Neveux

2005-05-01T23:59:59.000Z

220

Frequency–dependent numerical dynamics in mosquitofish  

Science Journals Connector (OSTI)

...can invade, but not drive the others extinct...equilibrium of genotype frequencies and total numbers...replication in the low-frequency treatment because the...treatment to be more variable. Mesocosms were established...from throw-trap data Frequency-dependent numerical...

2002-01-01T23:59:59.000Z

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While these samples are representative of the content of NLEBeta,
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221

Plasma astrophysics in numerical simulations A. Nordlund  

E-Print Network [OSTI]

in periodic domains are discussed. Modifications of the solutions by numerically motivated alterations-excited dynamos were invented by the Danish inventor Søren Hjorth, who received the patent for this discovery industrial importance in producing the most powerful generators at the time, for which he, in turn, received

Brandenburg, Axel

222

New statistical atom: A numerical study  

Science Journals Connector (OSTI)

The new differential equation for the statistical atom is derived and discussed in detail. Numerical results are presented which provide evidence for the validity of all approximations that have entered the formalism. A comparison of experimental data for diamagnetic susceptibilities with theoretical predictions shows that the new statistical atom significantly surpasses its Hartree-Fock competitor.

Berthold-Georg Englert and Julian Schwinger

1984-05-01T23:59:59.000Z

223

RIS-M-2393 GANDALF -A GENERALLY APPLICABLE NUMERICAL DATA  

E-Print Network [OSTI]

computer languages. INIS descriptors; DATA ACQUISITION; DATA PROCESSING; G CODES; NUMERICAL DATA UDC 681

224

Advanced Numerical Weather Prediction Techniques for Solar Irradiance Forecasting : : Statistical, Data-Assimilation, and Ensemble Forecasting  

E-Print Network [OSTI]

Multiscale numerical weather prediction model. Progress inassimilating numerical weather prediction model for solarwith numerical weather prediction models. In: Solar Energy

Mathiesen, Patrick James

2013-01-01T23:59:59.000Z

225

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

226

Numerical aspects of 3D stellar winds  

E-Print Network [OSTI]

This paper explores and compares the pitfalls of modelling the three-dimensional wind of a spherical star with a cartesian grid. Several numerical methods are compared, using either uniform and stretched grid or adaptative mesh refinement (AMR). An additional numerical complication is added, when an orbiting planet is considered. In this case a rotating frame is added to the model such that the orbiting planet is at rest in the frame of work. The three-dimensional simulations are systematically compared to an equivalent two-dimensional, axisymmetric simulation. The comparative study presented here suggests to limit the rotation rate of the rotating frame below the rotating frame of the star and provides guidelines for further three-dimensional modelling of stellar winds in the context of close-in star-planet interactions.

Strugarek, A; Matt, S P; Reville, V

2014-01-01T23:59:59.000Z

227

PLUTO: a Numerical Code for Computational Astrophysics  

E-Print Network [OSTI]

We present a new numerical code, PLUTO, for the solution of hypersonic flows in 1, 2 and 3 spatial dimensions and different systems of coordinates. The code provides a multi-physics, multi-algorithm modular environment particularly oriented towards the treatment of astrophysical flows in presence of discontinuities. Different hydrodynamic modules and algorithms may be independently selected to properly describe Newtonian, relativistic, MHD or relativistic MHD fluids. The modular structure exploits a general framework for integrating a system of conservation laws, built on modern Godunov-type shock-capturing schemes. Although a plethora of numerical methods has been successfully developed over the past two decades, the vast majority shares a common discretization recipe, involving three general steps: a piecewise polynomial reconstruction followed by the solution of Riemann problems at zone interfaces and a final evolution stage. We have checked and validated the code against several benchmarks available in li...

Mignone, A; Massaglia, S; Matsakos, T; Tesileanu, O; Zanni, C; Ferrari, A

2007-01-01T23:59:59.000Z

228

PLUTO: a Numerical Code for Computational Astrophysics  

E-Print Network [OSTI]

We present a new numerical code, PLUTO, for the solution of hypersonic flows in 1, 2 and 3 spatial dimensions and different systems of coordinates. The code provides a multi-physics, multi-algorithm modular environment particularly oriented towards the treatment of astrophysical flows in presence of discontinuities. Different hydrodynamic modules and algorithms may be independently selected to properly describe Newtonian, relativistic, MHD or relativistic MHD fluids. The modular structure exploits a general framework for integrating a system of conservation laws, built on modern Godunov-type shock-capturing schemes. Although a plethora of numerical methods has been successfully developed over the past two decades, the vast majority shares a common discretization recipe, involving three general steps: a piecewise polynomial reconstruction followed by the solution of Riemann problems at zone interfaces and a final evolution stage. We have checked and validated the code against several benchmarks available in literature. Test problems in 1, 2 and 3 dimensions are discussed.

A. Mignone; G. Bodo; S. Massaglia; T. Matsakos; O. Tesileanu; C. Zanni; A. Ferrari

2007-01-30T23:59:59.000Z

229

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.

230

A numerical approach to beam deflections  

E-Print Network [OSTI]

to Beam Deflections. (December 1974) Joel Ernest Lovell, B. S. , Texas ASM University Chairman of Advisory Committee: Prof. E. S. Holdr edge A numerical method for determining deflections of canti- lever and simply supported beams directly from their M/EI... de- flections due to shear is solvable analytically for many types of loadings and cross sectional variations. However, the solution of the equation is cumbersome for any situations where M/EI cannot be described as a continuous function of length...

Lovell, Joel Ernest

1974-01-01T23:59:59.000Z

231

Numerical Simulations of Hyperfine Transitions of Antihydrogen  

E-Print Network [OSTI]

One of the ASACUSA (Atomic Spectroscopy And Collisions Using Slow Antiprotons) collaboration's goals is the measurement of the ground state hyperfine transition frequency in antihydrogen, the antimatter counterpart of one of the best known systems in physics. This high precision experiment yields a sensitive test of the fundamental symmetry of CPT. Numerical simulations of hyperfine transitions of antihydrogen atoms have been performed providing information on the required antihydrogen events and the achievable precision.

Kolbinger, B; Diermaier, M; Lehner, S; Malbrunot, C; Massiczek, O; Sauerzopf, C; Simon, M C; Widmann, E

2015-01-01T23:59:59.000Z

232

The numerical evaluation of many dimensional integrals  

E-Print Network [OSTI]

assistance, and to the members of my committee, Drs. H. A. Luther and R, R. Hocking. TABLE OF CONTENTS Chapter Page I. INTRODUCTION Il. EXISTING METHODS OF NUMERICAL INTEGRATION . 3 Classical Methods Mo nte Carlo Methods . III. AN ERROR ANALYSIS . 10... Derivation of a Criterion. Error Approximation Using the Classical Method . . Error Estimate Using the Crude Monte Carlo Method 10 12 16 IV, EXPERIMENTS WITH CRUDE MONTE CARLO AND THE CLASSICAL METHOD. 18 A Method for Finding Exact Solutions...

Rhodes, Duane Lewis

2012-06-07T23:59:59.000Z

233

Numerical Analysis of some Generalized Casimir Pistons  

E-Print Network [OSTI]

The Casimir force due to a scalar field on a piston in a cylinder of radius $r$ with a spherical cap of radius $R>r$ is computed numerically in the world-line approach. A geometrical subtraction scheme gives the finite interaction energy that determines the Casimir force. The spectral function of convex domains is obtained from a probability measure on convex surfaces that is induced by the Wiener measure on Brownian bridges the convex surfaces are the hulls of. The vacuum force on the piston by a scalar field satisfying Dirichlet boundary conditions is attractive in these geometries, but the strength and short-distance behavior of the force depends crucially on the shape of the piston casing. For a cylindrical casing with a hemispherical head, the force for $a/R\\sim 0$ does not depend on the dimension of the casing and numerically approaches $\\sim - 0.00326(4)\\hbar c/a^2$. Semiclassically this asymptotic force is due to short, closed and non-periodic trajectories that reflect once off the piston near its periphery. The semiclassical estimate $-\\hbar c/(96\\pi a^2)(1+2\\sqrt{R^2-r^2}/a)$ for the force when $a/r\\ll r/R\\leq 1$ reproduces the numerical results within statistical errors.

Martin Schaden

2008-10-06T23:59:59.000Z

234

Numerical Studies of the Plasma Focus  

Science Journals Connector (OSTI)

The dynamical formation and structure of the plasma focus has been studied with a two?dimensional numerical fluid model. The extremely high kinetic energy densities obtained in the numerical fluid experiment as the result of adiabatic compression and viscous heating agree well with experiment. Three features in the plasma focus are isolated: an anode cold source a hot pinch region and an axial shock. The anomalously long lifetime of the plasma focus is shown to be the result of axial flow with stabilization of magnetohydrodynamic modes through the ion stress tensor in the intermediate collisionless collision?dominated regime. Estimates of the neutron yield based on the numerical fluid experiment concur with experimental yields and are the result of thermally reacting deuterons in the hot pinch region. The plasma parameters of interest determined from the hot pinch region suggest that the ion distribution function will not have a simple Maxwellian form and this in particular may account for the discrepancy with experiment on the anisotropy in space of the neutron yield.

D. E. Potter

1971-01-01T23:59:59.000Z

235

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  

SciTech Connect (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

236

FIESTA 2: parallelizeable multiloop numerical calculations  

E-Print Network [OSTI]

The program FIESTA has been completely rewritten. Now it can be used not only as a tool to evaluate Feynman integrals numerically, but also to expand Feynman integrals automatically in limits of momenta and masses with the use of sector decompositions and Mellin-Barnes representations. Other important improvements to the code are complete parallelization (even to multiple computers), high-precision arithmetics (allowing to calculate integrals which were undoable before), new integrators and Speer sectors as a strategy, the possibility to evaluate more general parametric integrals.

Smirnov, A V; Tentyukov, M

2009-01-01T23:59:59.000Z

237

FIESTA 2: parallelizeable multiloop numerical calculations  

E-Print Network [OSTI]

The program FIESTA has been completely rewritten. Now it can be used not only as a tool to evaluate Feynman integrals numerically, but also to expand Feynman integrals automatically in limits of momenta and masses with the use of sector decompositions and Mellin-Barnes representations. Other important improvements to the code are complete parallelization (even to multiple computers), high-precision arithmetics (allowing to calculate integrals which were undoable before), new integrators and Speer sectors as a strategy, the possibility to evaluate more general parametric integrals.

A. V. Smirnov; V. A. Smirnov; M. Tentyukov

2009-12-01T23:59:59.000Z

238

Numerical Tests of the Improved Fermilab Action  

E-Print Network [OSTI]

Recently, the Fermilab heavy-quark action was extended to include dimension-six and -seven operators in order to reduce the discretization errors. In this talk, we present results of the first numerical simulations with this action (the OK action), where we study the masses of the quarkonium and heavy-light systems. We calculate combinations of masses designed to test improvement and compare results obtained with the OK action to their counterparts obtained with the clover action. Our preliminary results show a clear improvement.

C. Detar; A. S. Kronfeld; M. B. Oktay

2010-11-23T23:59:59.000Z

239

Integration of numerical analysis tools for automated numerical optimization of a transportation package design  

SciTech Connect (OSTI)

The use of state-of-the-art numerical analysis tools to determine the optimal design of a radioactive material (RAM) transportation container is investigated. The design of a RAM package`s components involves a complex coupling of structural, thermal, and radioactive shielding analyses. The final design must adhere to very strict design constraints. The current technique used by cask designers is uncoupled and involves designing each component separately with respect to its driving constraint. With the use of numerical optimization schemes, the complex couplings can be considered directly, and the performance of the integrated package can be maximized with respect to the analysis conditions. This can lead to more efficient package designs. Thermal and structural accident conditions are analyzed in the shape optimization of a simplified cask design. In this paper, details of the integration of numerical analysis tools, development of a process model, nonsmoothness difficulties with the optimization of the cask, and preliminary results are discussed.

Witkowski, W.R.; Eldred, M.S.; Harding, D.C.

1994-09-01T23:59:59.000Z

240

RELAP-7 Numerical Stabilization: Entropy Viscosity Method  

SciTech Connect (OSTI)

The RELAP-7 code is the next generation nuclear reactor system safety analysis code being developed at the Idaho National Laboratory (INL). The code is based on the INL's modern scientific software development framework, MOOSE (Multi-Physics Object Oriented Simulation Environment). The overall design goal of RELAP-7 is to take advantage of the previous thirty years of advancements in computer architecture, software design, numerical integration methods, and physical models. The end result will be a reactor systems analysis capability that retains and improves upon RELAP5's capability and extends the analysis capability for all reactor system simulation scenarios. RELAP-7 utilizes a single phase and a novel seven-equation two-phase flow models as described in the RELAP-7 Theory Manual (INL/EXT-14-31366). The basic equation systems are hyperbolic, which generally require some type of stabilization (or artificial viscosity) to capture nonlinear discontinuities and to suppress advection-caused oscillations. This report documents one of the available options for this stabilization in RELAP-7 -- a new and novel approach known as the entropy viscosity method. Because the code is an ongoing development effort in which the physical sub models, numerics, and coding are evolving, so too must the specific details of the entropy viscosity stabilization method. Here the fundamentals of the method in their current state are presented.

R. A. Berry; M. O. Delchini; J. Ragusa

2014-06-01T23:59:59.000Z

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.


241

Numerical Test of a Mapping Theory for the IBM3  

Science Journals Connector (OSTI)

......for obtaining enough number of energy levels at low energy. Numerical analysis also indicates...Thompson M. J. Shell Model and Nuclear Structure (1989) World Scientific...for obtaining enough number of energy levels at low energy. Numerical......

Munetake Hasegawa

1991-01-01T23:59:59.000Z

242

When three is not some: On the pragmatics of numerals  

Science Journals Connector (OSTI)

Both numerals and quantifiers like some have more than one possible interpretation i.e., weak and strong interpretations. Some studies have found similar behavior for numerals and quantifiers, whereas others have shown critical differences. It ...

Einat Shetreet; Gennaro Chierchia; Nadine Gaab

2014-04-01T23:59:59.000Z

243

High Order Hybrid Numerical Simulations of Two Dimensional Detonation Waves  

E-Print Network [OSTI]

High Order Hybrid Numerical Simulations of Two Dimensional Detonation Waves Wei Cai Department detonation waves, we have devel- oped a high order numerical scheme suitable for calculating the detailed transverse wave structures of multidimensional detonation waves. The numerical algorithm uses a multi

Cai, Wei

244

Data Assimilation for Idealised Mathematical Models of Numerical Weather Prediction  

E-Print Network [OSTI]

Data Assimilation for Idealised Mathematical Models of Numerical Weather Prediction Supervisors). Background: Numerical Weather Prediction (NWP) has seen significant gains in accuracy in recent years due is directed at achieving real-world impact in numerical weather prediction by addressing fundamental issues

Wirosoetisno, Djoko

245

Forecasting wave height probabilities with numerical weather prediction models  

E-Print Network [OSTI]

Forecasting wave height probabilities with numerical weather prediction models Mark S. Roulstona; Numerical weather prediction 1. Introduction Wave forecasting is now an integral part of operational weather methods for generating such forecasts from numerical model output from the European Centre for Medium

Stevenson, Paul

246

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING Int. J. Numer. Meth. Engng 2011; 86:15441557  

E-Print Network [OSTI]

. Frey1,2 1UPMC Univ Paris 06, UMR 7598, Laboratoire J.L. Lions, F-75005 Paris, France 2Universidad de present a three-dimensional numerical simulation on a mechanical device. Copyright 2011 John Wiley & Sons.L. Lions, F-75005 Paris, France. E-mail: debuhan@ann.jussieu.fr Copyright 2011 John Wiley & Sons, Ltd. #12

Frey, Pascal

247

Numerical Investigation of Josephson Junction Structures  

SciTech Connect (OSTI)

Multilayered long Josephson Junction Structures form an interesting physical system where both nonlinearity and interaction between subsystems play an important role. Such systems allow to study physical effects that do not occur in single Josephson junction.The Sakai-Bodin-Pedersen model--a system of perturbed sine-Gordon equations--is used to study the dynamic states of stacks of inductively coupled long Josephson Junctions (LJJs). The corresponding static problem is numerically investigated as well. In order to study the stability of possible static solutions a Sturm-Liouville problem is generated and solved.The transitions from static to dynamic state and the scenario of these transitions are analyzed depending on the model parameters. Different physical characteristics--current-voltage characteristics, individual instant voltages and internal magnetic fields, are calculated and interpreted.

Hristov, I.; Dimova, S.; Boyadjiev, T. [Faculty of Mathematics and Informatics, Sofia University 5 James Bourchier Blvd., 1164 Sofia (Bulgaria)

2009-10-29T23:59:59.000Z

248

NUMERICAL MODELING OF CATHODE CONTACT MATERIAL DENSIFICATION  

SciTech Connect (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

Direct numerical simulation of turbulent reacting flows  

SciTech Connect (OSTI)

The development of turbulent combustion models that reflect some of the most important characteristics of turbulent reacting flows requires knowledge about the behavior of key quantities in well defined combustion regimes. In turbulent flames, the coupling between the turbulence and the chemistry is so strong in certain regimes that is is very difficult to isolate the role played by one individual phenomenon. Direct numerical simulation (DNS) is an extremely useful tool to study in detail the turbulence-chemistry interactions in certain well defined regimes. Globally, non-premixed flames are controlled by two limiting cases: the fast chemistry limit, where the turbulent fluctuations. In between these two limits, finite-rate chemical effects are important and the turbulence interacts strongly with the chemical processes. This regime is important because industrial burners operate in regimes in which, locally the flame undergoes extinction, or is at least in some nonequilibrium condition. Furthermore, these nonequilibrium conditions strongly influence the production of pollutants. To quantify the finite-rate chemistry effect, direct numerical simulations are performed to study the interaction between an initially laminar non-premixed flame and a three-dimensional field of homogeneous isotropic decaying turbulence. Emphasis is placed on the dynamics of extinction and on transient effects on the fine scale mixing process. Differential molecular diffusion among species is also examined with this approach, both for nonreacting and reacting situations. To address the problem of large-scale mixing and to examine the effects of mean shear, efforts are underway to perform large eddy simulations of round three-dimensional jets.

Chen, J.H. [Sandia National Laboratories, Livermore, CA (United States)

1993-12-01T23:59:59.000Z

250

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING Int. J. Numer. Meth. Biomed. Engng. 2014; 30:232248  

E-Print Network [OSTI]

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING Int. J. Numer. Meth. Biomed. International Journal for Numerical Methods in Biomedical Engineering published by John Wiley & Sons, Ltd in Biomedical Engineering published by John Wiley & Sons, Ltd. #12;SEGMENTATION OF BIOMEDICAL IMAGES 233

Grant, P. W.

251

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

252

Direct numerical simulations of aeolian sand ripples  

E-Print Network [OSTI]

Aeolian sand beds exhibit regular patterns of ripples resulting from the interaction between topography and sediment transport. Their characteristics have been so far related to reptation transport caused by the impacts on the ground of grains entrained by the wind into saltation. By means of direct numerical simulations of grains interacting with a wind flow, we show that the instability turns out to be driven by resonant grain trajectories, whose length is close to a ripple wavelength and whose splash leads to a mass displacement towards the ripple crests. The pattern selection results from a compromise between this destabilizing mechanism and a diffusive downslope transport which stabilizes small wavelengths. The initial wavelength is set by the ratio of the sediment flux and the erosion/deposition rate, a ratio which increases linearly with the wind velocity. We show that this scaling law, in agreement with experiments, originates from an interfacial layer separating the saltation zone from the static sand bed, where momentum transfers are dominated by mid-air collisions. Finally, we provide quantitative support for the use the propagation of these ripples as a proxy for remote measurements of sediment transport.

Orencio Duran; Philippe Claudin; Bruno Andreotti

2014-11-07T23:59:59.000Z

253

Jet?vortex Interaction: A Numerical Study  

Science Journals Connector (OSTI)

The interaction of a vortex and a jet plays an important role for many industrial processes such as Carbon Black formation or combustion in diesel engines. The knowledge of physics of these phenomena is crucial for engineers but also for scientists who wish to reveal many interesting and complex issues hidden there. In this research we numerically investigate cases where a cylindrical reactor is charged with gas injected through five ports. The first one is located along the main axis of the cylinder and this leads to the formation of the main jet. The other four ports are situated along the side walls such that the gas entering the cylinder tangentially through them causes a vortex to be formed. The objective of this paper is to show the fundamental physical phenomena and also how the initial and boundary conditions influence the results. Our most important observation at this stage is that the mixing process is more intense if the vortex is inclined towards x?axis. The results are mainly shown as snapshots of gas velocity.

Catalin G. Ilea; Pawel Kosinski; Alex C. Hoffmann

2009-01-01T23:59:59.000Z

254

Collisionless microinstabilities in stellarators. II. Numerical simulations  

SciTech Connect (OSTI)

Microinstabilities exhibit a rich variety of behavior in stellarators due to the many degrees of freedom in the magnetic geometry. It has recently been found that certain stellarators (quasi-isodynamic ones with maximum-J geometry) are partly resilient to trapped-particle instabilities, because fast-bouncing particles tend to extract energy from these modes near marginal stability. In reality, stellarators are never perfectly quasi-isodynamic, and the question thus arises whether they still benefit from enhanced stability. Here, the stability properties of Wendelstein 7-X and a more quasi-isodynamic configuration, QIPC, are investigated numerically and compared with the National Compact Stellarator Experiment and the DIII-D tokamak. In gyrokinetic simulations, performed with the gyrokinetic code GENE in the electrostatic and collisionless approximation, ion-temperature-gradient modes, trapped-electron modes, and mixed-type instabilities are studied. Wendelstein 7-X and QIPC exhibit significantly reduced growth rates for all simulations that include kinetic electrons, and the latter are indeed found to be stabilizing in the energy budget. These results suggest that imperfectly optimized stellarators can retain most of the stabilizing properties predicted for perfect maximum-J configurations.

Proll, J. H. E.; Xanthopoulos, P.; Helander, P. [Max-Planck-Institut für Plasmaphysik, EURATOM Association, Teilinstitut Greifswald, Wendelsteinstraße 1, 17491 Greifswald, Germany and Max-Planck/Princeton Research Center for Plasma Physics, 17491 Greifswald (Germany)] [Max-Planck-Institut für Plasmaphysik, EURATOM Association, Teilinstitut Greifswald, Wendelsteinstraße 1, 17491 Greifswald, Germany and Max-Planck/Princeton Research Center for Plasma Physics, 17491 Greifswald (Germany)

2013-12-15T23:59:59.000Z

255

Numerical studies of Phi^2-Oscillatons  

E-Print Network [OSTI]

We present an exhaustive analysis of the numerical evolution of the Einstein-Klein-Gordon equations for the case of a real scalar field endowed with a quadratic self-interaction potential. The self-gravitating equilibrium configurations are called oscillatons and are close relatives of boson stars, their complex counterparts. Unlike boson stars, for which the oscillations of the two components of the complex scalar field are such that the spacetime geometry remains static, oscillatons give rise to a geometry that is time-dependent and oscillatory in nature. However, they can still be classified into stable (S-branch) and unstable (U-branch) cases. We have found that S-oscillatons are indeed stable configurations under small perturbations and typically migrate to other S-profiles when perturbed strongly. On the other hand, U-oscillatons are intrinsically unstable: they migrate to the S-branch if their mass is decreased and collapse to black holes if their mass is increased even by a small amount. The S-oscillatons can also be made to collapse to black holes if enough mass is added to them, but such collapse can be efficiently prevented by the gravitational cooling mechanism in the case of diluted oscillatons.

Miguel Alcubierre; Ricardo Becerril; F. Siddhartha Guzman; Tonatiuh Matos; Dario Nunez; L. Arturo Urena-Lopez

2003-01-24T23:59:59.000Z

256

NUMERICAL SIMULATIONS OF DRIVEN RELATIVISTIC MAGNETOHYDRODYNAMIC TURBULENCE  

SciTech Connect (OSTI)

A wide variety of astrophysical phenomena involve the flow of turbulent magnetized gas with relativistic velocity or energy density. Examples include gamma-ray bursts, active galactic nuclei, pulsars, magnetars, micro-quasars, merging neutron stars, X-ray binaries, some supernovae, and the early universe. In order to elucidate the basic properties of the relativistic magnetohydrodynamical (RMHD) turbulence present in these systems, we present results from numerical simulations of fully developed driven turbulence in a relativistically warm, weakly magnetized and mildly compressible ideal fluid. We have evolved the RMHD equations for many dynamical times on a uniform grid with 1024{sup 3} zones using a high-order Godunov code. We observe the growth of magnetic energy from a seed field through saturation at {approx}1% of the total fluid energy. We compute the power spectrum of velocity and density-weighted velocity U = {rho}{sup 1/3} v and conclude that the inertial scaling is consistent with a slope of -5/3. We compute the longitudinal and transverse velocity structure functions of order p up to 11 and discuss their possible deviation from the expected scaling for non-relativistic media. We also compute the scale-dependent distortion of coherent velocity structures with respect to the local magnetic field, finding a weaker scale dependence than is expected for incompressible non-relativistic flows with a strong mean field.

Zrake, Jonathan; MacFadyen, Andrew I. [Center for Cosmology and Particle Physics, Physics Department, New York University, New York, NY 10003 (United States)

2012-01-01T23:59:59.000Z

257

Numerical evidence for the Wigner surmise  

Science Journals Connector (OSTI)

The ‘‘Wigner surmise’’ states that the probability density function of the eigenvalue spacings of a random system follows the Rayleigh distribution. Thus far the surmise has been proved mathematically only for systems described by the ‘‘Gaussian orthogonal ensemble (GOE)’’ of matrices. Random matrices associated with practical engineering structures do not have the form of the GOE and yet there is strong evidence that the Wigner surmise may still be applicable. The aim of the present work is to determine the conditions under which the natural frequency spacings of an engineering structure will have a Rayleigh distribution. To this end numerical simulations have been performed for a simply supported flat plate a simply supported string and a system composed of two spring?coupled plates. In each case the structure was made uncertain by the addition of randomly placed masses or springs. It was found that the validity of the Wigner surmise depends on three factors: (i) the level of randomness (ii) the degree of symmetry and (iii) for the coupled system on the strength of coupling between the two subsystems. The relative importance of these factors has been quantified for the examples considered. ?

2001-01-01T23:59:59.000Z

258

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

E-Print Network [OSTI]

for numerical weather prediction and climate models.   Abstract:  Numerical weather prediction (NWP) models are Model output statistics (MOS), Numerical Weather Prediction (

Mathiesen, Patrick; Kleissl, Jan

2011-01-01T23:59:59.000Z

259

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

E-Print Network [OSTI]

Multiscale Numerical Weather Prediction Model.   Progress assimilating numerical weather prediction model for solar customizable  numerical weather prediction model that is 

Mathiesen, Patrick; Collier, Craig; Kleissl, Jan

2013-01-01T23:59:59.000Z

260

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"

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.


261

Numerical Data Advisory Board assembly of mathematial and physical sciences  

SciTech Connect (OSTI)

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

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

Preliminary LSG Numerical Reliability DATt 5 January 1971  

E-Print Network [OSTI]

of the component application analysis and the FMEA. I . f.: I #12;· .... ATM-937 HY.MO. Preliminary l.SG Numerical

Rathbun, Julie A.

264

Numerical simulations of a vertical tail of a commercial aircraft...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of a commercial aircraft with active flow control Authors: Rasquin, M., Martin, J., Jansen, K. A series of numerical simulations of a realistic vertical tail of a commercial...

265

Numerical Modeling At Dixie Valley Geothermal Area (Iovenitti...  

Open Energy Info (EERE)

Iovenitti, Et Al., 2013) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Numerical Modeling At Dixie Valley Geothermal Area (Iovenitti, Et Al.,...

266

Direct Numerical Simulations and Robust Predictions of Cloud...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

the center of the bubble cloud. Credit: Computational Science and Engineering Laboratory, ETH Zurich, Switzerland Direct Numerical Simulations and Robust Predictions of Cloud...

267

Numerical Modeling of PCCI Combustion | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Modeling of HCCI and PCCI Combustion Processes Numerical Modeling of HCCI Combustion Bridging the Gap between Fundamental Physics and Chemistry and Applied Models for HCCI Engines...

268

NUMERICAL STUDIES OF ~MPURITIES IN FUSION PLASMAS*  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

269

A numerical scheme for ionizing shock waves  

SciTech Connect (OSTI)

A two-dimensional (2D) visual computer code to solve the steady state (SS) or transient shock problems including partially ionizing plasma is presented. Since the flows considered are hypersonic and the resulting temperatures are high, the plasma is partially ionized. Hence the plasma constituents are electrons, ions and neutral atoms. It is assumed that all the above species are in thermal equilibrium, namely, that they all have the same temperature. The ionization degree is calculated from Saha equation as a function of electron density and pressure by means of a nonlinear Newton type root finding algorithms. The code utilizes a wave model and numerical fluctuation distribution (FD) scheme that runs on structured or unstructured triangular meshes. This scheme is based on evaluating the mesh averaged fluctuations arising from a number of waves and distributing them to the nodes of these meshes in an upwind manner. The physical properties (directions, strengths, etc.) of these wave patterns are obtained by a new wave model: ION-A developed from the eigen-system of the flux Jacobian matrices. Since the equation of state (EOS) which is used to close up the conservation laws includes electronic effects, it is a nonlinear function and it must be inverted by iterations to determine the ionization degree as a function of density and temperature. For the time advancement, the scheme utilizes a multi-stage Runge-Kutta (RK) algorithm with time steps carefully evaluated from the maximum possible propagation speed in the solution domain. The code runs interactively with the user and allows to create different meshes to use different initial and boundary conditions and to see changes of desired physical quantities in the form of color and vector graphics. The details of the visual properties of the code has been published before (see [N. Aslan, A visual fluctuation splitting scheme for magneto-hydrodynamics with a new sonic fix and Euler limit, J. Comput. Phys. 197 (2004) 1-27]). The two-dimensional nature of ION-A was presented by a planar shock wave propagating over a circular obstacle. It was demonstrated that including the effects of ionization in calculating complex flows is important, even when they appear initially negligible. This code can be used to accurately simulate the nonlinear time dependent evolution of neutral or ionized plasma flows from supersonic to hypersonic regimes.

Aslan, Necdet [Yeditepe University, Physics Department, Kayisda g-circumflex i, 34755 Istanbul (Turkey)]. E-mail: naslan@yeditepe.edu.tr; Mond, Michael [Ben Gurion University, Mechanical Engineering Department, Beer Sheva (Israel)

2005-12-10T23:59:59.000Z

270

Numerical simulation of wind effects: a probabilistic perspective Ahsan Kareem  

E-Print Network [OSTI]

Numerical simulation of wind effects: a probabilistic perspective Ahsan Kareem NatHaz Modeling Laboratory, University of Notre Dame, Notre Dame, IN 46556 ABSTRACT: Numerical simulations of wind loads and their effects are critical in the design of structures to ensure their safety under winds. The simulations range

Kareem, Ahsan

271

Numerical simulation of contaminant flow in a wool scour  

Science Journals Connector (OSTI)

Wool scouring is the process of washing dirty wool after shearing. Our model numerically simulates contaminant movement in a wool scour bowl using the advection-dispersion equation. This is the first wool scour model to give time-dependent results and ... Keywords: Finite differences, Numerical simulation, Wool scouring

J. F. Caunce; S. I. Barry; G. N. Mercer; T. R. Marchant

2007-08-01T23:59:59.000Z

272

Numerical Simulation of a Natural Circulation Steam Generator  

E-Print Network [OSTI]

Numerical Simulation of a Natural Circulation Steam Generator W. Linzer \\Lambda , K. Ponweiser circulation steam generator. We focus on a model with a simple geometry consisting of two vertical pipes properties of water and steam. We present a numerical algorithm based on an explicit upwind discretization

Weinmüller, Ewa B.

273

Numerical Simulation of Wave Loads on Static Offshore Structures  

E-Print Network [OSTI]

Numerical Simulation of Wave Loads on Static Offshore Structures Hrvoje Jasak, Inno Gatin, Vuko Workshop, Cambridge, 30 July 2014 Numerical Simulation of Wave Loads on Static Offshore Structures ­ p. #12 of Wave Loads on Static Offshore Structures ­ p. #12;VOF Free Surface Flow Model Modelling of Free Surface

274

A new shock-capturing numerical scheme for ideal hydrodynamics  

E-Print Network [OSTI]

We present a new algorithm for solving ideal relativistic hydrodynamics based on Godunov method with an exact solution of Riemann problem for an arbitrary equation of state. Standard numerical tests are executed, such as the sound wave propagation and the shock tube problem. Low numerical viscosity and high precision are attained with proper discretization.

Zuzana Feckova; Boris Tomasik

2015-01-07T23:59:59.000Z

275

A Mobile Computing Architecture for Numerical Simulation Cyril Dumont  

E-Print Network [OSTI]

A Mobile Computing Architecture for Numerical Simulation Cyril Dumont Paris 12 University LACL of a numeric computation have to react when their context changes. This paper offers a new architecture, a mobile computing architecture, based on mobile agents and JavaSpace. At the end of this paper, we apply

Paris-Sud XI, Université de

276

Compositional analysis of floating-point linear numerical filters  

E-Print Network [OSTI]

Compositional analysis of floating-point linear numerical filters David Monniaux CNRS / Laboratoire filters are used in a variety of applications (sound treatment, control/command, etc.), implemented experience with the Astr´ee static analyzer [3] is that precise analysis of the numerical behavior

Monniaux, David

277

A new shock-capturing numerical scheme for ideal hydrodynamics  

E-Print Network [OSTI]

We present a new algorithm for solving ideal relativistic hydrodynamics based on Godunov method with an exact solution of Riemann problem for an arbitrary equation of state. Standard numerical tests are executed, such as the sound wave propagation and the shock tube problem. Low numerical viscosity and high precision are attained with proper discretization.

Feckova, Zuzana

2015-01-01T23:59:59.000Z

278

A parametric scheme for the numerical solution of the Boussinesq equation  

Science Journals Connector (OSTI)

A parametric scheme is proposed for the numerical solution of the nonlinear Boussinesq equation. The numerical method is developed by...

A. G. Bratsos

2001-01-01T23:59:59.000Z

279

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

280

Numerical Methods in Spontaneous Combustion with the Help of MATLAB  

Science Journals Connector (OSTI)

Spontaneous combustion is a complicated process and its control function is a partial differential equation (PDE) of heat conduction. With the help of initial conditions and boundary conditions, we can get unique solution. The correspondence conditions are called conditions for unique solution. However, analytical solution is only possible for a few conditions. Hereby, with the help of computer, we introduce numerical methods to get numerical solutions. We will introduce both the analytical method and the numerical methods for a certain kind of spontaneous combustion. We will mainly focus on the numerical methods, since it has better competence when solving complex problems. And also to insure the accuracy of the numerical methods, we will contrast it with analytical solution. MATLAB is used as the tool of programme to solve the problem easily.

Quan-bing Luo; You-hua Fu; Dong Liang

2013-01-01T23:59:59.000Z

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.


281

Master's programme in Naval Architecture Programme outline  

E-Print Network [OSTI]

of conception, design, implementation and operation of boats, ships and other marine installations. In addition, manoeuvring, propulsion, and hull structural design.The multi-disciplinary character of the subject through new ship designs,new propulsion systems,and the application of new lighter structural materials

Haviland, David

282

Naval Postgraduate School Monterey, California 939435138  

E-Print Network [OSTI]

strives to sustain excellence in the quality of its instructional programs, to be responsive and supporting research programs to achieve three major goals: 1) academic programs that are nationally of the four pillars of Joint Visions 2010 and 2020 and their enabling technologies; and, 3) executive

283

Naval Research Laboratory Stennis Space Center  

E-Print Network [OSTI]

to the Navy is the need to monitor and predict the ocean. Currents, surface waves, temperature structure of ocean features involve global circulation to currents in estuaries and rivers. NRL research leads.nrlssc.navy.mil). Global ocean systems provide currents and temperature throughout the world (http://www7320.nrlssc

284

E-Print Network Topics: N  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

base naval nuclear propulsion naval observatory ccd naval observatory vlbi naval oil shale reserves naval oil shale naval ordnance laboratory naval ordnance test naval petroleum...

285

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

286

Simple intrinsic defects in GaAs : numerical supplement.  

SciTech Connect (OSTI)

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

287

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

2006-09-26T23:59:59.000Z

288

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

289

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

290

A numerical investigation of collisionality and turbulent transport  

E-Print Network [OSTI]

An investigation of collisionality's role in turbulent transport in magnetized plasma using the GS2 gyrokinetic simulation software is presented. The investigation consists of three parts, conducted by way of numerical ...

Lindsey, Martin L., S.B. Massachusetts Institute of Technology

2014-01-01T23:59:59.000Z

291

Numerical Simulation of the December 26, 2004: Indian Ocean Tsunami  

E-Print Network [OSTI]

Numerical Simulation of the December 26, 2004: Indian Ocean Tsunami J. Asavanant1, M. Ioualalen2, N. Kaewbanjak1, S. Grilli3, P. Watts4, and J. Kirby5 Abstract: The December 26, 2004 tsunami is one of the most

Kirby, James T.

292

Numerical investigations of plasma parameters in the COMPASS tokamak  

Science Journals Connector (OSTI)

A numerical investigation of plasma parameters in a diverter configuration of COMPASS tokamak is presented. The plasma parameters in the ... regimes in the boundary layer of the COMPASS tokamak is discussed.

E. Havlickova; R. Zagorski; R. Panek

2008-09-01T23:59:59.000Z

293

Numerical upper and lower bound limit analysis for braced excavations  

E-Print Network [OSTI]

This thesis reviews limit theorems and their applications for stability problems in geotechnical engineering. Rigorous numerical solutions of limit analyses can be obtained through finite element discretization of the soil ...

Degwitz, Fernando G. (Fernando Guillermo), 1980-

2004-01-01T23:59:59.000Z

294

Numerical models of phosphate esters in the Chattahoochee River  

E-Print Network [OSTI]

A numerical model was constructed to assess the magnitude of organophosphoric acid triester sinks in the Chattahoochee River and to identify concentration patterns downstream of point source discharges. The model was built ...

Haffey, Samuel Fraad, 1973-

2004-01-01T23:59:59.000Z

295

Numerical Simulation Study on Transpired Solar Air Collector  

E-Print Network [OSTI]

ICEBO2006, Shenzhen, China Re newable Energy Resources and a Greener Future Vol.VIII-3-4 Numerical Simulation Study on Transpired Solar Air Collector Chongjie Wang Zhenzhong Guan Xueyi Zhao Delin Wang Professor...

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

2006-01-01T23:59:59.000Z

296

Investigating dynamic underground coal fires by means of numerical simulation  

Science Journals Connector (OSTI)

......available within the combustion centre. Combustion will only proceed whenever...controls the overall combustion rate. For numerical...transport-only and a chemistry-only part. Common...rate of underground coal fires by oxygen transport......

S. Wessling; W. Kessels; M. Schmidt; U. Krause

2008-01-01T23:59:59.000Z

297

2.086 Numerical Computation for Mechanical Engineers, Spring 2012  

E-Print Network [OSTI]

This class introduces elementary programming concepts including variable types, data structures, and flow control. After an introduction to linear algebra and probability, it covers numerical methods relevant to mechanical ...

Patera, Anthony

298

Electrowetting-based microfluidics: mathematical modeling and numerical simulation  

Science Journals Connector (OSTI)

The work presented in this dissertation focuses on the mathematical modeling and numerical simulation of the dynamics of a liquid droplet undergoing electrowetting, or electrowetting-on-dielectrics (EWOD). A mathematical model is formulated for the two-phase ...

Michael Franklin / Ali Nadim

2013-01-01T23:59:59.000Z

299

Numerical Test of Born-Oppenheimer Approximation in Chaotic Systems  

E-Print Network [OSTI]

We study the validity of the Born-Oppenheimer approximation in chaotic dynamics. Using numerical solutions of autonomous Fermi accelerators, we show that the general adiabatic conditions can be interpreted as the narrowness of the chaotic region in phase space.

Jeong-Bo Shim; Mahir S. Hussein; Martina Hentschel

2009-08-04T23:59:59.000Z

300

Intelligent Vision-Based Computerized Numerically Controlled (CNC) Machine  

Science Journals Connector (OSTI)

In this article a system is developed to improve the performance of Computerized Numerically Controlled (CNC) machines by utilizing on-line vision based ... and control systems. Two different types of CNC machine...

Ghassan Al-Kindi; Hussien Zughaer

2012-01-01T23:59:59.000Z

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.


301

Kalman Filter and Analog Schemes to Postprocess Numerical Weather Predictions  

Science Journals Connector (OSTI)

Two new postprocessing methods are proposed to reduce numerical weather prediction’s 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

302

Asphaltene Deposition in Carbonate Rocks: Experimental Investigation and Numerical Simulation  

Science Journals Connector (OSTI)

Asphaltene Deposition in Carbonate Rocks: Experimental Investigation and Numerical Simulation ... Interfacial tension (IFT) as one of the main properties for efficient CO2 flooding planning in oil reservoirs depends strongly on pressure, temperature, and composition of the reservoir fluids. ...

Shahin Kord; Rohaldin Miri; Shahab Ayatollahi; Mehdi Escrochi

2012-06-20T23:59:59.000Z

303

Numerical Simulations of Water Wave Propagation and Flooding  

Science Journals Connector (OSTI)

In this paper we present main points in the process of application of numerical schemes for hyperbolic balance laws to water wave propagation and flooding. The appropriate mathematical models are the one ... two-...

Luka Sopta; Nelida ?rnjari?-Žic…

2005-01-01T23:59:59.000Z

304

Numerical model of planar heterojunction organic solar cells  

Science Journals Connector (OSTI)

We present a numerical study of the effects of the energy barrier between the lowest unoccupied molecular orbital of the acceptor layer and the cathode, the thicknesses of the donor layer and acceptor layer on th...

ChaoZhu Ma; YingQuan Peng; RunSheng Wang; RongHua Li…

2011-07-01T23:59:59.000Z

305

Numerical Implementation of the Wave Energy Balance Equation  

Science Journals Connector (OSTI)

Successful solution of the problem of hindcasting and forecasting a sea wind wave depends on the quality of the physical model, the numerical implementation of the wave energy balance equation and the accuracy of...

Professor Dr. Igor V. Lavrenov

2003-01-01T23:59:59.000Z

306

Effective conductivity of loaded granular materials by numerical simulation  

Science Journals Connector (OSTI)

...studied by numerical simulation. The particles are smooth uniform spheres with...granular assemblages of frictional particles (God- dard et al. 1993, 1994) in...packed granular materials with high particle-to-medium conductivity ratio...

1998-01-01T23:59:59.000Z

307

Benchmark Tests for Numerical Weather Forecasts on Inexact Hardware  

Science Journals Connector (OSTI)

A reduction of computational cost would allow higher resolution in numerical weather predictions within the same budget for computation. This paper investigates two approaches that promise significant savings in computational cost: the use of ...

Peter D. Düben; T. N. Palmer

2014-10-01T23:59:59.000Z

308

Numerical simulation for formed projectile of depleted uranium alloy  

Science Journals Connector (OSTI)

The numerical simulation for forming projectile of depleted uranium alloy with the SPH (Smooth Particle Hydrodynamic ... . To describe the deformed behaviors of the depleted uranium alloy under high pressure and ...

Song Shun-cheng; Gao Ping; Cai Hong-nian

2003-09-01T23:59:59.000Z

309

The Impact of Satellite Data on Global Numerical Weather Prediction  

Science Journals Connector (OSTI)

The European Centre for Medium Range Weather Forecasts (ECMWF) produces operational global forecasts ... state of the atmosphere at 12Z. The satellite data used in a global Numerical Weather Prediction (NWP) syst...

J. Pailleux

1987-01-01T23:59:59.000Z

310

The Use of Satellite Data in Numerical Weather Prediction  

Science Journals Connector (OSTI)

The basic ideas of numerical weather prediction (NWP) are introduced and it ... so called conventional observations with remotely-sensed (satellite based) measurements is demonstrated. The true nature of satellite

A. P. McNally

1994-01-01T23:59:59.000Z

311

Numerical solutions of differential equations on FPGA-enhanced computers  

E-Print Network [OSTI]

, 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...

He, Chuan

2009-05-15T23:59:59.000Z

312

Householder Symposium on Numerical Linear Algebra June 1721, 2002  

E-Print Network [OSTI]

for discussions. This year's symposium is held at Peebles Hotel Hydro in the small town of Peebles (populationHouseholder Symposium on Numerical Linear Algebra June 17­21, 2002 Peebles Hotel Hydro, Scotland

Higham, Nicholas J.

313

Experimental and numerical study of primary consolidation of soft clay  

E-Print Network [OSTI]

This research investigates, experimentally and numerically, the three main factors that differentiate predictions based on Terzaghi's one-dimensional consolidation theory from those observed in the laboratory and field. ...

Korchaiyapruk, Attasit, 1977-

2007-01-01T23:59:59.000Z

314

Numerical simulation of laser ignition of a liquid fuel film  

Science Journals Connector (OSTI)

Numerical simulations were used to examine a set of interrelated physicochemical processes involved in the ignition of a liquid fuel film by a low-power laser beam. The delay time of ignition of a liquid fuel fil...

G. V. Kuznetsov; P. A. Strizhak

2010-08-01T23:59:59.000Z

315

The Interaction of Numerically Simulated Supercells Initiated along Lines  

Science Journals Connector (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

316

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...

Guichard, Aurelien

2012-06-07T23:59:59.000Z

317

Numerical Investigation of Solar Chimney Power Plant in UAE  

Science Journals Connector (OSTI)

This paper presents a numerical simulation results for a steady air flow inside a solar chimney power plant. A standard k-epsilon turbulence model is used to model a prototype solar chimney that was built in Al A...

Mohammad O. Hamdan; Saud Khashan

2014-01-01T23:59:59.000Z

318

Tracer method in numerical simulation of combustion processes  

Science Journals Connector (OSTI)

Fuel-rich laminar flat hydrogen-methane-air flames are studied numerically using the tracer method. It is found that, in the near-limit mixture, hydrogen has an advantage in the oxidation by oxygen. As the sto...

V. A. Bunev; A. V. Baklanov; I. G. Namyatov…

2007-11-01T23:59:59.000Z

319

A Numerical Sensitivity Study of Aerosol Influence on Immersion Freezing  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

320

Higher-Rank Numerical Ranges of Unitary and Normal Matrices  

E-Print Network [OSTI]

We verify a conjecture on the structure of higher-rank numerical ranges for a wide class of unitary and normal matrices. Using analytic and geometric techniques, we show precisely how the higher-rank numerical ranges for a generic unitary matrix are given by complex polygons determined by the spectral structure of the matrix. We discuss applications of the results to quantum error correction, specifically to the problem of identification and construction of codes for binary unitary noise models.

Man-Duen Choi; John A. Holbrook; David W. Kribs; Karol Zyczkowski

2007-01-31T23:59:59.000Z

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

NUMERICAL METHODS FOR THE SIMULATION OF HIGH INTENSITY HADRON SYNCHROTRONS.  

SciTech Connect (OSTI)

Numerical algorithms for PIC simulation of beam dynamics in a high intensity synchrotron on a parallel computer are presented. We introduce numerical solvers of the Laplace-Poisson equation in the presence of walls, and algorithms to compute tunes and twiss functions in the presence of space charge forces. The working code for the simulation here presented is SIMBAD, that can be run as stand alone or as part of the UAL (Unified Accelerator Libraries) package.

LUCCIO, A.; D'IMPERIO, N.; MALITSKY, N.

2005-09-12T23:59:59.000Z

322

Higher-dimensional numerical relativity: Formulation and code tests  

SciTech Connect (OSTI)

We derive a formalism of numerical relativity for higher-dimensional spacetimes and develop numerical codes for simulating a wide variety of five-dimensional (5D) spacetimes for the first time. First, the Baumgarte-Shapiro-Shibata-Nakamura formalism is extended for arbitrary spacetime dimensions D{>=}4, and then, the so-called cartoon method, which was originally proposed as a robust method for simulating axisymmetric 4D spacetimes, is described for 5D spacetimes of several types of symmetries. Implementing 5D numerical relativity codes with the cartoon methods, we perform test simulations by evolving a 5D Schwarzschild spacetime and a 5D spacetime composed of a gravitational-wave packet of small amplitude. The numerical simulations are stably performed for a sufficiently long time, as done in the 4D case, and the obtained numerical results agree well with the analytic solutions: The numerical solutions are shown to converge at the correct order. We also confirm that a long-term accurate evolution of the 5D Schwarzschild spacetime is feasible using the so-called puncture approach. In addition, we derive the Landau-Lifshitz pseudotensor in arbitrary dimensions, and show that it gives a robust tool for computing the energy flux of gravitational waves. The formulations and methods developed in this paper provide a powerful tool for studying nonlinear dynamics of higher-dimensional gravity.

Yoshino, Hirotaka; Shibata, Masaru [Department of Physics, University of Alberta, Edmonton, Alberta, T6G 2G7 (Canada); Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto, 606-8502 (Japan)

2009-10-15T23:59:59.000Z

323

Numerical investigation of transient hydrothermal processes around intrusions: heat-transfer and fluid-  

E-Print Network [OSTI]

Numerical investigation of transient hydrothermal processes around intrusions: heat the intrusion. Keywords: Hydrothermal processes, numerical modelling, magmatic intrusion, permeability- depth around magmatic intrusions have been obtained through coupled hydrothermal numerical modelling that takes

Paris-Sud XI, Université de

324

Multigrid methods for improving the variational data assimilation in numerical weather prediction  

E-Print Network [OSTI]

conditions are needed to solve numerical weather prediction models: initial condition and boundary conditionMultigrid methods for improving the variational data assimilation in numerical weather prediction: numerical weather prediction, variational data assimilation, minimization procedure, multigrid methods, cell

Kwak, Do Young

325

A Simulation and Decision Framework for Selection of Numerical Solvers in  

Science Journals Connector (OSTI)

Selecting the right numerical solver or the most appropriate numerical package for a particular simulation problem it is increasingly difficult for users without an extensive mathematical background and deeper knowledge in numerical analysis. In this ...

Peter Bunus

2006-04-01T23:59:59.000Z

326

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

Science Journals Connector (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; Françoise Girard; Pedro Osuna; Michel Benoit

2012-12-01T23:59:59.000Z

327

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

328

Relativistic Scalar Gravity: A Laboratory for Numerical Relativity  

E-Print Network [OSTI]

We present here a relativistic theory of gravity in which the spacetime metric is derived from a single scalar field $\\Phi$. The field equation, derived from a simple variational principle, is a non-linear flat-space four-dimensional wave equation which is particularly suited for numerical evolution. We demonstrate that while this theory does not generate results which are exactly identical quantitatively to those of general relativity (GR), many of the qualitative features of the full GR theory are reproduced to a reasonable approximation. The advantage of this formulation lies in the fact that 3D numerical grids can be numerically evolved in minutes or hours instead of the days and weeks required by GR, thus drastically reducing the development time of new relativistic hydrodynamical codes. Scalar gravity therefore serves as a meaningful testbed for the development of larger routines destined for use under the full theory of general relativity.

Keith Watt; Charles W. Misner

1999-10-10T23:59:59.000Z

329

NUMERICAL SIMULATION OF NATURAL GAS-SWIRL BURNER  

SciTech Connect (OSTI)

A numerical simulation of a turbulent natural gas jet diffusion flame at a Reynolds number of 9000 in a swirling air stream is presented. The numerical computations were carried out using the commercially available software package CFDRC. The instantaneous chemistry model was used as the reaction model. The thermal, composition, flow (velocity), as well as stream function fields for both the baseline and air-swirling flames were numerically simulated in the near-burner region, where most of the mixing and reactions occur. The results were useful to interpret the effects of swirl in enhancing the mixing rates in the combustion zone as well as in stabilizing the flame. The results showed the generation of two recirculating regimes induced by the swirling air stream, which account for such effects. The present investigation will be used as a benchmark study of swirl flow combustion analysis as a step in developing an enhanced swirl-cascade burner technology.

Ala Qubbaj

2005-03-01T23:59:59.000Z

330

Low-mass planets in nearly inviscid disks: Numerical treatment  

E-Print Network [OSTI]

Embedded planets disturb the density structure of the ambient disk and gravitational back-reaction will induce possibly a change in the planet's orbital elements. The accurate determination of the forces acting on the planet requires careful numerical analysis. Recently, the validity of the often used fast orbital advection algorithm (FARGO) has been put into question, and special numerical resolution and stability requirements have been suggested. In this paper we study the process of planet-disk interaction for small mass planets of a few Earth masses, and reanalyze the numerical requirements to obtain converged and stable results. One focus lies on the applicability of the FARGO-algorithm. Additionally, we study the difference of two and three-dimensional simulations, compare global with local setups, as well as isothermal and adiabatic conditions. We study the influence of the planet on the disk through two- and three-dimensional hydrodynamical simulations. To strengthen our conclusions we perform a detai...

Kley, Wilhelm; Kolb, Stefan M; Benitez-Llambay, Pablo; Masset, Frederic

2012-01-01T23:59:59.000Z

331

Accelerating numerical solution of Stochastic Differential Equations with CUDA  

E-Print Network [OSTI]

Numerical integration of stochastic differential equations is commonly used in many branches of science. In this paper we present how to accelerate this kind of numerical calculations with popular NVIDIA Graphics Processing Units using the CUDA programming environment. We address general aspects of numerical programming on stream processors and illustrate them by two examples: the noisy phase dynamics in a Josephson junction and the noisy Kuramoto model. In presented cases the measured speedup can be as high as 675x compared to a standard CPU, which corresponds to sev eral billion integration steps per second. This means that calculations which took weeks can now be completed in less than one hour. This brings stochastic simulation to a completely new level, opening for research a whole new range of problems which can now be solved interactively.

Januszewski, M

2009-01-01T23:59:59.000Z

332

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

333

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

334

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 (OSTI)

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.

Not Available

1994-10-01T23:59:59.000Z

335

Analysis of anelastic flow and numerical treatment via finite elements  

SciTech Connect (OSTI)

In this report, we reconsider the various approximations made to the full equations of motion and energy transport for treating low-speed flows with significant temperature induced property variations. This entails assessment of the development of so-called anelastic for low-Mach number flows outside the range of validity of the Boussinesq equations. An integral part of this assessment is the development of a finite element-based numerical scheme for obtaining approximate numerical solutions to this class of problems. Several formulations were attempted and are compared.

Martinez, M.J.

1994-05-01T23:59:59.000Z

336

Numerical Methodology to Evaluate Fast Reactor Sodium Combustion  

SciTech Connect (OSTI)

In the present study, a numerical methodology for sodium combustion has been developed for the safety evaluation of a liquid-metal-cooled fast reactor. The methodology includes a fast-running zone model computer program for safety evaluation, a field model program for multidimensional thermal hydraulics, and a chemical reaction analysis program based on chemical equilibrium theory. Two recently performed experiments have been analyzed using the computer programs, and the numerical results are in good agreement with the experiments. Although sodium combustion is a complex phenomenon, use of these computer programs gives better understanding of the coupled thermal hydraulics and chemical reaction.

Yamaguchi, Akira; Takata, Takashi; Okano, Yasushi [Japan Nuclear Cycle Development Institute (Japan)

2001-12-15T23:59:59.000Z

337

NCPART: management of ICEMDDN output for numerical control users  

SciTech Connect (OSTI)

NCPART is a procedure developed by the Numerical Control Department at Bendix Kansas City Division to handle the entry to and exit from ICEMDDN, and process all of the local files output by ICEMDDN. The NCPART procedure is menu driven, and provides automatic access to ICEMDDN and any files necessary to process information with ICEM for numerical Control users. Basically, the procedure handles all of the ICEMDDN operations that involve operating system commands, and frees the NC programmer to concentrate on his/her work as a programmer.

Rossini, B.F.

1986-04-01T23:59:59.000Z

338

Numerical convergence of the branching time of negative streamers  

Science Journals Connector (OSTI)

Discharge streamers in experiments branch frequently. Arrayás et al. [Phys. Rev. Lett. 88, 174502 (2002)] presented simulations of branching streamers and interpreted them as physical branching events. The numerical results were criticized by Kulikovsky [Phys. Rev. Lett. 89, 229401 (2002)]. Using an adaptive grid algorithm, we here present numerical experiments on the effect of grid resolution on streamer branching. The convergence of branching time with stepwise finer grid sizes provides a quantitative correction on the earlier, low-resolution results in overvolted gaps. Furthermore, streamers can branch even in undervolted, but sufficiently long gaps, but fewer branching modes are accessible than in higher fields.

Carolynne Montijn, Ute Ebert, and Willem Hundsdorfer

2006-06-28T23:59:59.000Z

339

Numerical calculation of wave refraction by digital computer  

E-Print Network [OSTI]

+~ with time. 20 22 22 25 28 WiL), H, H s o vs. F(i ), DL L 0 43 10 Refraction pattern for uniform slope 10 second p~riod 60 approach; numerical analysis solution 0 Refraction pattern for uniform slope 10 second period 120 approach; numerical... of varying radii (3) as shown in Figure l. It can be seen that the crest deforms and turns toward the segment of lowest celerity. Let M and N be two adjacent points along the crest separated by a distance An at time t (Figure 2a). The corresponding wave...

Orr, Terry Edwin

2012-06-07T23:59:59.000Z

340

Notes 09. Numerical evaluation of natural modes and frequencies  

E-Print Network [OSTI]

(23) () () 1111 ? 0 TT T SS ?=? ?? Mu ? Mu ? M? then () 1 1 11 T S T ? ? ? Mu ? M? (24) MEEN 617 ? HD#9. Numerical methods for finding eigenvalues & eigenvectors L. San Andr?s ? 2008 11 Or, () () () () 11 11 ? T SSS ST =?? 1 ??M uSuu... (23) () () 1111 ? 0 TT T SS ?=? ?? Mu ? Mu ? M? then () 1 1 11 T S T ? ? ? Mu ? M? (24) MEEN 617 ? HD#9. Numerical methods for finding eigenvalues & eigenvectors L. San Andr?s ? 2008 11 Or, () () () () 11 11 ? T SSS ST =?? 1 ??M uSuu...

San Andres, Luis

2008-01-01T23:59:59.000Z

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.


341

Numerical Simulation of Detonation Initiation by the Space-Time Conservation Element and Solution Element Method.  

E-Print Network [OSTI]

??This dissertation is focused on the numerical simulation of the detonation initiation process. The space-time Conservation Element and Solution Element (CESE) method, a novel numerical… (more)

Wang, Bao

2010-01-01T23:59:59.000Z

342

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.

343

Numerical and experimental analysis of spray atomization characteristics of a GDI injector  

Science Journals Connector (OSTI)

In this study, numerical and experimental analysis on the spray atomization characteristics of a GDI injector is performed. For numerical approach,...

Sung Wook Park; Hyung Jun Kim; Chang Sik Lee

2003-03-01T23:59:59.000Z

344

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.

345

Mercury's thermo-chemical evolution from numerical models constrained  

E-Print Network [OSTI]

Mercury's thermo-chemical evolution from numerical models constrained by MESSENGER observations Globe de Paris, France #12;Basics facts about Mercury · Semi-major axis: 0.39 AU · 3:2 spin Earth!) · Black body temperature: 440 K #12;Exploration of Mercury Mariner10 ·First spacecraft to use

Cerveny, Vlastislav

346

Analytical and numerical studies of a singularly perturbed Boussinesq equation  

E-Print Network [OSTI]

Analytical and numerical studies of a singularly perturbed Boussinesq equation Ranjan K. Dash Abstract We study the singularly perturbed (sixth-order) Boussinesq equation recently in- troduced obtain weakly non-local solitary wave solutions of the singularly perturbed (sixth-order) Boussinesq

Daripa, Prabir

347

Numerical Tokamak Turbulence calculations on the CRAY T3E  

Science Journals Connector (OSTI)

Full cross section calculations of ion-temperature-gradient-driven turbulence with Landau closure are being carried out as part of the Numerical Tokamak Turbulence Project, one of the U. S. Department of Energy's Phase II Grand Challenges. To include ... Keywords: PVM, fusion energy, parallel computing, t3e, turbulence

V. E. Lynch; J-N. Leboeuf; B. A. Carreras; J. D. Alvarez; L. Garcia

1997-11-01T23:59:59.000Z

348

Numerical Modeling of Acoustic Timescale Detonation J.D. Regele  

E-Print Network [OSTI]

Numerical Modeling of Acoustic Timescale Detonation Initiation J.D. Regele , D.R. Kassoy and O to perform one and two-dimensional simulations of acoustic timescale detonation initiation using thermal overdriven detonation wave that decays to a steady-state CJ wave. A 1-D parametric study of acoustic

Vasilyev, Oleg V.

349

Detonation shock dynamics and comparisons with direct numerical simulation  

E-Print Network [OSTI]

Detonation shock dynamics and comparisons with direct numerical simulation Tariq D. Aslam # , and D­ nation and detonation shock dynamics (DSD) is made. The theory of DSD defines the motion of the detonation shock in terms of intrinsic geometry of the shock surface, in particular for condensed phase ex

Aslam, Tariq

350

A Numerical and Analytical Study of Detonation Diffraction  

E-Print Network [OSTI]

A Numerical and Analytical Study of Detonation Diffraction Thesis by Marco Arienti In Partial. This work could be completed only thanks to his insight in all aspects of detonation theory, modeling insights in fluid mechanics in general and physics of detonations in particular ­ Eric Schultz, Joanna

Barr, Al

351

Detonation shock dynamics and comparisons with direct numerical simulation  

E-Print Network [OSTI]

Detonation shock dynamics and comparisons with direct numerical simulation Tariq D. Aslam , and D- nation and detonation shock dynamics (DSD) is made. The theory of DSD defines the motion of the detonation shock in terms of intrinsic geometry of the shock surface, in particular for condensed phase ex

Aslam, Tariq

352

DIRECT NUMERICAL SIMULATION OF INTERACTION OF DETONATION WAVE WITH HOMOGENEOUS  

E-Print Network [OSTI]

DIRECT NUMERICAL SIMULATION OF INTERACTION OF DETONATION WAVE WITH HOMOGENEOUS ISOTROPIC TURBULENCE SIMULATION OF INTERACTION OF DETONATION WAVE WITH HOMOGENEOUS ISOTROPIC TURBULENCE HARI NARAYANAN NAGARAJAN The propagation of a shock or detonation wave through a reactive mixture has been the subject of research for over

Texas at Arlington, University of

353

Numerical simulation of fluid flow in porous/fractured media  

SciTech Connect (OSTI)

Theoretical models of fluid flow in porous/fractured media can help in the design of in situ fossil energy and mineral extraction technologies. Because of the complexity of these processes, numerical solutions are usually required. Sample calculations illustrate the capabilities of present day computer models.

Travis B.J.; Cook, T.L.

1981-01-01T23:59:59.000Z

354

MPI-StarT: delivering network performance to numerical applications  

Science Journals Connector (OSTI)

We describe an MPI implementation for a cluster of SMPs interconnected by a high-performance interconnect. This work is a collaboration between a numerical applications programmer and a cluster interconnect architect. The collaboration started with the ... Keywords: MITMatlab, MPI, MPICH, SMP, StarT-X, clustering, performance

Parry Husbands; James C. Hoe

1998-11-01T23:59:59.000Z

355

Numerical Aerodynamic Optimization Incorporating Laminar-Turbulent Transition Prediction  

E-Print Network [OSTI]

Numerical Aerodynamic Optimization Incorporating Laminar-Turbulent Transition Prediction J. Driver-dimensional Newton­Krylov aerodynamic shape optimization algorithm is applied to several optimization problems a striking demonstration of the capability of the Newton­ Krylov aerodynamic optimization algorithm to design

Zingg, David W.

356

Ris-R-1353(EN) Numerical Investigation of Three Wind  

E-Print Network [OSTI]

rotor is the one de- scribed in Antoniou et al [3]. Here a 95 kW Tellus wind turbine with LM8.2 bladesRisø-R-1353(EN) Numerical Investigation of Three Wind Turbine Blade Tips Jeppe Johansen, Niels N around three different tip sha- pes on a rotating wind turbine blade is investigated and analyzed using

357

Numerical simulation of turbulent jet primary breakup in Diesel engines  

E-Print Network [OSTI]

Numerical simulation of turbulent jet primary breakup in Diesel engines Peng Zeng1 Marcus Herrmann and Aerospace Engineering Arizona State University "Micro-Macro Modelling and Simulation of Liquid-Vapour Flows" IRMA Strasbourg, 23.Jan.2008 #12;Introduction DNS of Primary Breakup in Diesel Injection Phase

Helluy, Philippe

358

A 3D numerical model for Kepler's supernova remnant  

Science Journals Connector (OSTI)

......28, 1428 Buenos Aires, Argentina 3 Facultad de Ciencias Exactas...Universidad de Buenos Aires, Argentina We present new 3D numerical...density of 103 and an explosion energy of 7-1050-erg. The obtained...the gas pressure. The total energy density E is given by where......

J. C. Toledo-Roy; A. Esquivel; P. F. Velázquez; E. M. Reynoso

2014-01-01T23:59:59.000Z

359

Numerical Modeling of Internal Tide Generation along the Hawaiian Ridge  

Science Journals Connector (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

360

MATH625/CSI740 --SPRING 2011 NUMERICAL LINEAR ALGEBRA  

E-Print Network [OSTI]

.00­7.00 or by appointment. Webpage: http://math.gmu.edu/harbir/m625/ MATLAB links: http://math.gmu.edu/html/help/matlab (Thursday March 24th), a (cumulative) final exam (May 12th) and two numerical projects that will be set during the term (dates to be announced). The midterm and the two projects will each be worth 20

Lamba, Harbir

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

NEW APPROACHES IN NUMERICAL ANALYSIS IN CIVIL ENGINEERING  

E-Print Network [OSTI]

Numerical modeling on behavior under loads of self compacting concrete floors with hollow space 134 15, 2011 1 Table of Contents 1. David Procházka, Jirí Brozovský, Klára Krízová High-Strength Concrete-Ionut Stefancu Dynamic nonlinear analysis of structural reinforced concrete walls energy dissipators with shear

Fernandez, Thomas

362

A numerical magnetohydrodynamic scheme using the hydrostatic approximation  

Science Journals Connector (OSTI)

......non-magnetic variables. Note that this diagram gives no information regarding the vertical...5 SUMMARY We have described a numerical MHD scheme designed to model phenomena in gravitationally...Nordlunda., GalsgaardK., 1995, A 3D MHD Code for Parallel Computers, Technical......

Jonathan Braithwaite; Yuri Cavecchi

2012-12-21T23:59:59.000Z

363

Numerical Simulation of Airmass Transformation over the Gulf of Mexico  

Science Journals Connector (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

364

110112 NatSciLab -Numerical Software Introduction to MATLAB  

E-Print Network [OSTI]

Outline 110112 NatSciLab - Numerical Software Introduction to MATLAB Onur Oktay Jacobs University Bremen Spring 2010 #12;MATLAB Desktop Environment The Command line Operators MATLAB data types Outline 1 MATLAB Desktop Environment 2 The Command line A quick start Indexing 3 Operators Arithmetic (Array

Vasylkevych, Sergiy

365

Numerical Analysis of Flow Characteristics of An Atmospheric Plasma Torch  

E-Print Network [OSTI]

Numerical Analysis of Flow Characteristics of An Atmospheric Plasma Torch You-Jae Kim, J.-G. HanCheon-dong, Suwon 440-746, KOREA Abstract The atmospheric plasma is regarded as an effective method for surface mathematical models used for simulating plasma characteristics inside an atmospheric plasma torch is carried

Paris-Sud XI, Université de

366

Threedimensional numerical simulation of the temperature, potential and concentration  

E-Print Network [OSTI]

with the mathematical modelling and numerical simu­ lation of natural gas­fed solid oxide cells (Solid Oxide Fuel Cell, SOFC). The physics of fuel cell operation and the simplifying assumptions which are taken into account.1 The mathematical model A 3D model of a cell is obtained by writing the conservation laws in the solid parts

Herbin, Raphaèle

367

Induction Generation Ostrowski Recognition Discrete geometry and numeration  

E-Print Network [OSTI]

Induction Generation Ostrowski Recognition Discrete geometry and numeration V. Berth´e LIRMM;Induction Generation Ostrowski Recognition A classical problem in Diophantine approximation How to approximate a line in R3 by points in Z3 ? How to define a discrete line in R3? #12;Induction Generation

368

Numerical modeling of magnetohydrodynamic activity in the Swarthmore Spheromak Experiment  

E-Print Network [OSTI]

Numerical modeling of magnetohydrodynamic activity in the Swarthmore Spheromak Experiment V. S resistive magnetohydrodynamic MHD simulation are compared to experimental data from the Swarthmore Spheromak is shown to reproduce global equilibrium magnetic field profiles of the spheromaks as well as much

Brown, Michael R.

369

A 3D numerical model for Kepler's supernova remnant  

Science Journals Connector (OSTI)

......synthetic X-ray maps from the numerical...considering an AGB mass-loss rate...Mo-yr1, a wind terminal velocity of 10-km-s1...of the AGB wind mass-loss rate, terminal velocity and ISM density...out of the wind bubble considerably...X-ray emission maps, taking into......

J. C. Toledo-Roy; A. Esquivel; P. F. Velázquez; E. M. Reynoso

2014-01-01T23:59:59.000Z

370

Hydraulic Fractures: multiscale phenomena, asymptotic and numerical solutions  

E-Print Network [OSTI]

Hydraulic Fractures: multiscale phenomena, asymptotic and numerical solutions CSIRO CSS TCP Detournay (UMN) Eduard Siebrits (SLB) #12;2 Outline · Examples of hydraulic fractures · Governing equations well stimulation Fracturing Fluid Proppant #12;5 Quarries #12;6 Magma flow Tarkastad #12;7 Model EQ 1

Peirce, Anthony

371

Hydraulic Fractures: multiscale phenomena, asymptotic and numerical solutions  

E-Print Network [OSTI]

Hydraulic Fractures: multiscale phenomena, asymptotic and numerical solutions SANUM Conference (UMN) Eduard Siebrits (SLB) #12;2 Outline · Examples of hydraulic fractures · Governing equations well stimulation Fracturing Fluid Proppant #12;5 Quarries #12;6 Magma flow Tarkastad #12;7 Model EQ 1

Peirce, Anthony

372

Theoretical and Numerical Analysis of Polarization for Time Dependent Radiative  

E-Print Network [OSTI]

transport equation with respect to the polariza- tion parameters solve the matrix-valued radiative transferTheoretical and Numerical Analysis of Polarization for Time Dependent Radiative Transfer Equations@math.stanford.edu Abstract We consider the matrix-valued radiative transfer equations for the Stokes param- eters

Bal, Guillaume

373

Cytosolic Ca2+ ions regulate numerous aspects of cellular  

E-Print Network [OSTI]

Cytosolic Ca2+ ions regulate numerous aspects of cellular activity in virtually all cell types (Berridge et al. 2000). This versatility is made possible by the diverse mechanisms by which Ca2+ signals; Marchant & Parker, 2000). Endogenous Ca2+ binding proteins play a key role in determining the magnitude

Parker, Ian

374

Numerical Optimization Methodology for the Design of Power Equipment  

E-Print Network [OSTI]

health effects from overhead power line conductors [6,7]. Even though no conclusive evidence has been of utility companies have been involved in a redesign of their overhead transmission lines to avoid potentialNumerical Optimization Methodology for the Design of Power Equipment Gaurav Tewari* My M. Hua

Mamishev, Alexander

375

Friction versus dilation revisited: Insights from theoretical and numerical models  

E-Print Network [OSTI]

Friction versus dilation revisited: Insights from theoretical and numerical models N. Makedonska,1 controlled by the frictional strength of the fault gouge, a granular layer that accumulates between the fault friction coefficient) of such granular layers is the systems resistance to dilation, a byprocess

Einat, Aharonov

376

Turbulent Erosion Of Persistent Cold-Air Pools: Numerical Simulations  

Science Journals Connector (OSTI)

High-resolution idealized numerical simulations are used to examine the turbulent removal of cold-air pools commonly observed in mountain valleys and basins. A control simulation with winds aloft increasing from 0.5 to 20 m s-1 over 20 h combined ...

Neil P. Lareau; John D. Horel

377

Numerical simulation of cooling gas injection using adaptive multiscale techniques  

E-Print Network [OSTI]

focus on reducing this effects. Only very recently, active cooling strategies have been developed alsoNumerical simulation of cooling gas injection using adaptive multiscale techniques Wolfgang Dahmen Mathematik, RWTH Aachen, Templergraben 55, 52056 Aachen Abstract The interaction of a jet of cooling gas

378

Numerical Modeling of Brain Dynamics in Traumatic Situations -Impulsive Translations  

E-Print Network [OSTI]

.S.A. Abstract We numerically model the brain dy- namics during and after impulsive head translations using brain injuries appear among boxers and shaken babies despite minimal rotations of their heads. Modeling head translations also helps understand the brain dynamics during head rotations about an arbitrary

Burtscher, Martin

379

Numerical simulations of bedrock valley evolution by meandering rivers  

E-Print Network [OSTI]

of valley evolution pathways and the long-term stability of valley morphology under constant forcingNumerical simulations of bedrock valley evolution by meandering rivers with variable bank material Institute of Technology, Pasadena, California, USA Abstract Bedrock river valleys are fundamental components

380

A mathematical and numerical study of incompressible flows with a ...  

E-Print Network [OSTI]

the interface in the presence of surfactant monolayers, is very important. ... existence of a weak solution, and present three-dimensional numerical .... We use the standard notation Wk,p(R) for Wk,p(R; R), and also abuse the notation ...... computations is a fit to the experimentally measured surface tension of vitamin K1.

2010-03-27T23:59:59.000Z

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 computation of the helical Chandrasekhar-Kendall modes  

Science Journals Connector (OSTI)

A new formulation is presented for numerically computing the helical Chandrasekhar-Kendall modes in an axisymmetric torus. It explicitly imposes @?.B=0 and yields a standard matrix eigenvalue problem, which can then be solved by standard matrix eigenvalue ... Keywords: Chandrasekhar-Kendall modes, Eigenvalue, Helicity injection, Magnetic relaxation, Reversed field pinch, Spherical tokamak, Taylor state

X. Z. Tang

2011-02-01T23:59:59.000Z

382

Differential and Numerically Invariant Signature Curves Applied to Object Recognition  

Science Journals Connector (OSTI)

We introduce a new paradigm, the differential invariant signature curve or manifold, for the invariant recognition of visual objects. A general theorem of É. Cartan implies that two curves are related by a group transformation if and only if ... Keywords: Euclidean group, curve shortening flow, differential invariant, equi-affine group, joint invariant, numerical approximation, object recognition, signature curve, snake, symmetry group

Eugenio Calabi; Peter J. Olver; Chehrzad Shakiban; Allen Tannenbaum; Steven Haker

1998-02-01T23:59:59.000Z

383

Numerical Entropy Production on Shocks and Smooth Transitions  

E-Print Network [OSTI]

production does not result in a substantial extra computational cost. We consider the one-dimensional system we started in [5]. We compute the entropy production on a gas dynamic test problem for severalNumerical Entropy Production on Shocks and Smooth Transitions Gabriella Puppo z November 12, 2001

Ceragioli, Francesca

384

Structure and Evolution of Numerically Simulated Squall Lines  

Science Journals Connector (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

385

Numerical algorithms for the computation of the Smith normal  

E-Print Network [OSTI]

Numerical algorithms for the computation of the Smith normal form of integral matrices C of the Smith normal form of integral matrices are described. More specifically, the com­ pound matrix method of the algorithms. AMS Subject Classification: Primary 65F30, Secondary 15A21, 15A36. Key words and phrases: Smith

Seberry, Jennifer

386

DETECTING FAILURE EVENTS IN BUILDINGS: A NUMERICAL AND EXPERIMENTAL ANALYSIS  

E-Print Network [OSTI]

DETECTING FAILURE EVENTS IN BUILDINGS: A NUMERICAL AND EXPERIMENTAL ANALYSIS V. M. Heckman1 M. D the brittle fracture of welds associated with beam-column connections in instrumented buildings in real time use of a prerecorded catalog of Green's functions for an instrumented building to detect failure

Greer, Julia R.

387

THE NAVAL RESEARCH ENTERPRISE AND PLASMA PHYSICS RESEARCH AT THE NAVAL RESEARCH LAB  

E-Print Network [OSTI]

, to create Xray simulators for testing nuclear weapons effects, and to understand high altitude nuclear ex

Shyy, Wei

388

Numerical simulations of welds of thick steel pieces of interest for the thermonuclear fusion ITER machine  

E-Print Network [OSTI]

Numerical simulations of welds of thick steel pieces of interest for the thermonuclear fusion ITER machine

Carmignani, B

2005-01-01T23:59:59.000Z

389

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

390

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

391

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

392

Petascale Direct Numerical Simulations of Turbulent Channel Flow  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

393

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

394

Energy stability bounds on convective heat transport: Numerical study  

SciTech Connect (OSTI)

The concept of nonlinear energy stability has recently been extended to deduce bounds on energy dissipation and transport in incompressible flows, even for turbulent flows. In this approach an effective stability condition on {open_quotes}background{close_quotes} flow or temperature profiles is derived, which when satisfied ensures that the profile produces a rigorous upper estimate to the bulk dissipation. Optimization of the test background profiles in search of the lowest upper bounds leads to nonlinear Euler-Lagrange equations for the extremal profile. In this paper, in the context of convective heat transport in the Boussinesq equations, we describe numerical solutions of the Euler-Lagrange equations for the optimal background temperature and present the numerical computation of the implied bounds. {copyright} {ital 1997} {ital The American Physical Society}

Doering, C.R. [Department of Mathematics, University of Michigan, Ann Arbor, Michigan 48109-1109 (United States)] [Department of Mathematics, University of Michigan, Ann Arbor, Michigan 48109-1109 (United States); Hyman, J.M. [Theoretical Division and Center for Nonlinear Studies, MS-B284, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)] [Theoretical Division and Center for Nonlinear Studies, MS-B284, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

1997-06-01T23:59:59.000Z

395

Technical Report: Scalable Parallel Algorithms for High Dimensional Numerical Integration  

SciTech Connect (OSTI)

We implemented a scalable parallel quasi-Monte Carlo numerical high-dimensional integration for tera-scale data points. The implemented algorithm uses the Sobol s quasi-sequences to generate random samples. Sobol s sequence was used to avoid clustering effects in the generated random samples and to produce low-discrepancy random samples which cover the entire integration domain. The performance of the algorithm was tested. Obtained results prove the scalability and accuracy of the implemented algorithms. The implemented algorithm could be used in different applications where a huge data volume is generated and numerical integration is required. We suggest using the hyprid MPI and OpenMP programming model to improve the performance of the algorithms. If the mixed model is used, attention should be paid to the scalability and accuracy.

Masalma, Yahya [Universidad del Turabo; Jiao, Yu [ORNL

2010-10-01T23:59:59.000Z

396

Numerical method for shear bands in ductile metal with inclusions  

SciTech Connect (OSTI)

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

397

Hydrodynamics of Hypersonic Jets: Experiments and Numerical Simulations  

E-Print Network [OSTI]

Stars form in regions of the galaxy that are denser and cooler than the mean interstellar medium. These regions are called Giant Molecular Clouds. At the beginning of their life, up to $10^5-10^6$ years, stars accrete matter from their rich surrounding environment and are origin of a peculiar phenomenon that is the jet emission. Jets from Young Stellar Objects (YSOs) are intensively studied by the astrophysical community by observations at different wavelengths, analytical and numerical modeling and laboratory experiments. Indications about the jet propagation and its resulting morphologies are here obtained by means of a combined study of hypersonic jets carried out both in the laboratory and by numerical simulations.

Belan, Marco; Tordella, Daniela; Massaglia, Silvano; Ferrari, Attilio; Mignone, Andrea; Bodenschatz, Eberhard

2011-01-01T23:59:59.000Z

398

Numerical Regularization of Electromagnetic Quantum Fluctuations in Inhomogeneous Dielectric Media  

E-Print Network [OSTI]

Electromagnetic Casimir stresses are of relevance to many technologies based on mesoscopic devices such as MEMS embedded in dielectric media, Casimir induced friction in nano-machinery, micro-fluidics and molecular electronics. Computation of such stresses based on cavity QED generally require numerical analysis based on a regularization process. A new scheme is described that has the potential for wide applicability to systems involving realistic inhomogeneous media. From a knowledge of the spectrum of the stationary modes of the electromagnetic field the scheme is illustrated by estimating numerically the Casimir stress on opposite faces of a pair of perfectly conducting planes separated by a vacuum and the change in this result when the region between the plates is filled with an incompressible inhomogeneous non-dispersive dielectric.

Shin-itiro Goto; Alison C. Hale; Robin W. Tucker; Timothy J. Walton

2012-01-05T23:59:59.000Z

399

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

400

Numerical Simulations of Penetration and Overshoot in the Sun  

Science Journals Connector (OSTI)

We present numerical simulations of convective overshoot in a two-dimensional model of the solar equatorial plane. The model equations are solved in the anelastic approximation with enhanced thermal conductivity and viscosity for numerical stability. The simulated domain extends from 0.001 to 0.93 R?, spanning both convective and radiative regions. We show that convective penetration leads to a slightly extended, mildly subadiabatic temperature gradient beneath the convection zone, spanning approximately 0.05Hp, below which there is a rapid transition to a strongly subadiabatic region. A slightly higher temperature is maintained in the overshoot region by adiabatic heating from overshooting plumes. This enhanced temperature may partially account for the sound speed discrepancy between the standard solar model and helioseismology. Simulations conducted with tracer particles suggest that a fully mixed region exists down to at least 0.684 R?.

Tamara M. Rogers; Gary A. Glatzmaier; C. A. Jones

2006-01-01T23:59:59.000Z

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.


401

DSC numerical solution of the Oberbeck-Boussinesq equations  

E-Print Network [OSTI]

Dual Scattering Channel schemes generalise Johns' TLM algorithm and replace the latter in situations where the transmission line picture of wave propagation fails. This is notoriously the case in applications to fluid dynamics, for instance. In this paper, a DSC numerical solution of the Oberbeck-Boussinesq equations is presented, which approximate the Navier-Stokes equations for viscous quasi incompressible flow with moderate variation in temperature.

Steffen Hein

2005-05-04T23:59:59.000Z

402

Numerical experiments with the LANCELOT package (Release A)  

E-Print Network [OSTI]

by A.R. Conn 1 , Nick Gould 2 , and Ph.L. Toint 3 Report 92/16 (3rd revision) September 5, 1995 1 IBM T with the LANCELOT package (Release A) for large­scale nonlinear optimization A.R. Conn Nick Gould Ph.L. Toint numerical tests and discuss the relative merits of the options. The experiments described involve both

Toint, Philippe

403

Numerical procedure for calculating temperature profiles in LMFBR coolant channels  

SciTech Connect (OSTI)

A new numerical procedure (which makes use of a weighted residuals procedure in space and a fully-implicit finite difference procedure in time), for calculating temperatures in an LMFBR coolant channel has been developed and incorporated into the Super System Code (SSC). This procedure is highly accurate on a nodal basis and has greatly increased computational efficiency as compared to the method formerly in SSC.

Horak, W.C.; Kennett, R.J.; Guppy, J.G.

1981-07-01T23:59:59.000Z

404

Numerical simulations of gravitational collapse in Einstein-aether theory  

E-Print Network [OSTI]

We study gravitational collapse of a spherically symmetric scalar field in Einstein-aether theory (general relativity coupled to a dynamical unit timelike vector field). The initial value formulation is developed, and numerical simulations are performed. The collapse produces regular, stationary black holes, as long as the aether coupling constants are not too large. For larger couplings a finite area singularity occurs. These results are shown to be consistent with the stationary solutions found previously.

David Garfinkle; Christopher Eling; Ted Jacobson

2007-07-01T23:59:59.000Z

405

Segmented vs conventional numerals: legibility and long term retention  

E-Print Network [OSTI]

the environmental chamber. Sub jects The subjects were thirty male students between the ages of 1g and 27 from the Industrial Engineering department at Texas A&M University. Subjects were divided into three groups of 10. Procedure Exposure time and number... December 1971 Ma]or Subject: Industrial Engineering SEGMENTED VS CONVENTIONAL NUMERALS: LEGIBILITY AND LONG TERM RETENTION A Thesis STEVE EDGAR HILL Approved as to style and content by: Elias Chairman of Committee) r. A. W. ortham (Head...

Hill, Steve Edgar

1971-01-01T23:59:59.000Z

406

Experimental and Numerical Examination of the Thermal Transmittance of High  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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.

407

Kinetic theory and numerical simulations of two-species coagulation  

E-Print Network [OSTI]

In this work we study the stochastic process of two-species coagulation. This process consists in the aggregation dynamics taking place in a ring. Particles and clusters of particles are set in this ring and they can move either clockwise or counterclockwise. They have a probability to aggregate forming larger clusters when they collide with another particle or cluster. We study the stochastic process both analytically and numerically. Analytically, we derive a kinetic theory which approximately describes the process dynamics. One of our strongest assumptions in this respect is the so called well-stirred limit, that allows neglecting the appearance of spatial coordinates in the theory, so this becomes effectively reduced to a zeroth dimensional model. We determine the long time behavior of such a model, making emphasis in one special case in which it displays self-similar solutions. In particular these calculations answer the question of how the system gets ordered, with all particles and clusters moving in the same direction, in the long time. We compare our analytical results with direct numerical simulations of the stochastic process and both corroborate its predictions and check its limitations. In particular, we numerically confirm the ordering dynamics predicted by the kinetic theory and explore properties of the realizations of the stochastic process which are not accessible to our theoretical approach.

Carlos Escudero; Fabricio Macia; Raul Toral; Juan J. L. Velazquez

2014-04-19T23:59:59.000Z

408

Numerical Methods of Computational Electromagnetics for Complex Inhomogeneous Systems  

SciTech Connect (OSTI)

Understanding electromagnetic phenomena is the key in many scientific investigation and engineering designs such as solar cell designs, studying biological ion channels for diseases, and creating clean fusion energies, among other things. The objectives of the project are to develop high order numerical methods to simulate evanescent electromagnetic waves occurring in plasmon solar cells and biological ion-channels, where local field enhancement within random media in the former and long range electrostatic interactions in the latter are of major challenges for accurate and efficient numerical computations. We have accomplished these objectives by developing high order numerical methods for solving Maxwell equations such as high order finite element basis for discontinuous Galerkin methods, well-conditioned Nedelec edge element method, divergence free finite element basis for MHD, and fast integral equation methods for layered media. These methods can be used to model the complex local field enhancement in plasmon solar cells. On the other hand, to treat long range electrostatic interaction in ion channels, we have developed image charge based method for a hybrid model in combining atomistic electrostatics and continuum Poisson-Boltzmann electrostatics. Such a hybrid model will speed up the molecular dynamics simulation of transport in biological ion-channels.

Cai, Wei

2014-05-15T23:59:59.000Z

409

Numerical Investigation of Laser Propulsion for Transport in Water Environment  

SciTech Connect (OSTI)

Problems that cumber the development of the laser propulsion in atmosphere and vacuum are discussed. Based on the theory of interaction between high-intensity laser and materials, as air and water, it is proved that transport in water environment can be impulsed by laser. The process of laser propulsion in water is investigated theoretically and numerically. It shows that not only the laser induced plasma shock wave, but also the laser induced bubble oscillation shock waves and the pressure induced by the collapsing bubble can be used. Many experimental results show that the theory and the numerical results are valid. The numerical result of the contribution of every propulsion source is given in percentage. And the maximum momentum coupling coefficient Cm is given. Laser propulsion in water environment can be applied in many fields. For example, it can provide highly controllable forces of the order of micro-Newton ({mu}N) in microsystems, such as the MEMS (Micro-electromechanical Systems). It can be used as minimally invasive surgery tools of high temporal and spatial resolution. It can be used as the propulsion source in marine survey and exploitation.

Han Bing; Li Beibei; Zhang Hongchao; Chen Jun; Shen Zhonghua; Lu Jian; Ni Xiaowu [Department of Science, Nanjing University of Science and Technology, Nanjing 210094 (China)

2010-10-08T23:59:59.000Z

410

Numerical heat conduction in hydrodynamical models of colliding hypersonic flows  

E-Print Network [OSTI]

Hydrodynamical models of colliding hypersonic flows are presented which explore the dependence of the resulting dynamics and the characteristics of the derived X-ray emission on numerical conduction and viscosity. For the purpose of our investigation we present models of colliding flow with plane-parallel and cylindrical divergence. Numerical conduction causes erroneous heating of gas across the contact discontinuity which has implications for the rate at which the gas cools. We find that the dynamics of the shocked gas and the resulting X-ray emission are strongly dependent on the contrast in the density and temperature either side of the contact discontinuity, these effects being strongest where the postshock gas of one flow behaves quasi-adiabatically while the postshock gas of the other flow is strongly radiative. Introducing additional numerical viscosity into the simulations has the effect of damping the growth of instabilities, which in some cases act to increase the volume of shocked gas and can re-he...

Parkin, E R

2010-01-01T23:59:59.000Z

411

Transient productivity index for numerical well test simulations  

SciTech Connect (OSTI)

The most difficult aspect of numerical simulation of well tests is the treatment of the Bottom Hole Flowing (BHF) Pressure. In full field simulations, this pressure is derived from the Well-block Pressure (WBP) using a numerical productivity index which accounts for the grid size and permeability, and for the well completion. This productivity index is calculated assuming a pseudo-steady state flow regime in the vicinity of the well and is therefore constant during the well production period. Such a pseudo-steady state assumption is no longer valid for the early time of a well test simulation as long as the pressure perturbation has not reached several grid-blocks around the well. This paper offers two different solutions to this problem: (1) The first one is based on the derivation of a Numerical Transient Productivity Index (NTPI) to be applied to Cartesian grids; (2) The second one is based on the use of a Corrected Transmissibility and Accumulation Term (CTAT) in the flow equation. The representation of the pressure behavior given by both solutions is far more accurate than the conventional one as shown by several validation examples which are presented in the following pages.

Blanc, G.; Ding, D.Y.; Ene, A. [Institut Francais du Petrole, Pau (France)] [and others

1997-08-01T23:59:59.000Z

412

Numerical implication of Riemann problem theory for fluid dynamics  

SciTech Connect (OSTI)

The Riemann problem plays an important role in understanding the wave structure of fluid flow. It is also crucial step in some numerical algorithms for accurately and efficiently computing fluid flow; Godunov method, random choice method, and from tracking method. The standard wave structure consists of shock and rarefaction waves. Due to physical effects such as phase transitions, which often are indistinguishable from numerical errors in an equation of state, anomalkous waves may occur, ''rarefaction shocks'', split waves, and composites. The anomalous waves may appear in numerical calculations as waves smeared out by either too much artificial viscosity or insufficient resolution. In addition, the equation of state may lead to instabilities of fluid flow. Since these anomalous effects due to the equation of state occur for the continuum equations, they can be expected to occur for all computational algorithms. The equation of state may be characterized by three dimensionless variables: the adiabatic exponent ..gamma.., the Grueneisen coefficient GAMMA, and the fundamental derivative G. The fluid flow anomalies occur when inequalities relating these variables are violated. 18 refs.

Menikoff, R.

1988-01-01T23:59:59.000Z

413

Numerical Modeling of WECS at Ecole Centrale de Nantes  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

414

Numerical studies of a simple Coulomb blockade model  

E-Print Network [OSTI]

simple model of the Coulomb blockade is studied. In this model, two interacting electrons tunnel in a one-dimensional structure with two barriers in series. The two-particle, time-dependent Schrodinger equation is solved numerically. It is found... tunneling by the other, and the inside electron tunnels out only after the outside electron tunnels a second time. The distribution of the charge density for the two electrons is shown in a series of three-dimensional figures as a function of time. Also...

Shao, Jianfeng

2012-06-07T23:59:59.000Z

415

Numerical simulation of contaminant flow in a wool scour  

Science Journals Connector (OSTI)

Wool scouring is the process of washing dirty wool after shearing. Our model numerically simulates contaminant movement in a wool scour bowl using the advection–dispersion equation. This is the first wool scour model to give time-dependent results and to model the transport of contaminants within a single scour bowl. Our aim is to gain a better understanding of the operating parameters that will produce efficient scouring. Investigating the effects of varying the parameters reveals simple, interesting relationships that give insight into the dynamics of a scour bowl.

J.F. Caunce; S.I. Barry; G.N. Mercer; T.R. Marchant

2007-01-01T23:59:59.000Z

416

Numerical cosmology on the GPU with Enzo and Ramses  

E-Print Network [OSTI]

A number of scientific numerical codes can currently exploit GPUs with remarkable performance. In astrophysics, Enzo and Ramses are prime examples of such applications. The two codes have been ported to GPUs adopting different strategies and programming models, Enzo adopting CUDA and Ramses using OpenACC. We describe here the different solutions used for the GPU implementation of both cases. Performance benchmarks will be presented for Ramses. The results of the usage of the more mature GPU version of Enzo, adopted for a scientific project within the CHRONOS programme, will be summarised.

Gheller, Claudio; Vazza, Franco; Teyssier, Romain

2014-01-01T23:59:59.000Z

417

Experimental and Numerical Investigation of Flows in Expanding Channels  

SciTech Connect (OSTI)

We present an experimental realization of the classical Jeffery-Hamel flows inside a wedge-shaped channel. We compare the measured velocity fields with the predictions of Jeffery-Hamel theory. A detailed experimental study of bifurcation diagrams for the solutions reveals the absolute stability of the pure outflow solution and an interesting hysteretic structure for bifurcations. We also observe a multiple vortex flow regime predicted earlier numerically and analytically. Experimental studies of the stability of the flow to perturbations at the channel exit are also conducted.

Vorobieff, Peter; Putkaradze, Vakhtang

2008-10-24T23:59:59.000Z

418

Numerical simulation of carbon arc discharge for nanoparticle synthesis  

SciTech Connect (OSTI)

Arc discharge with catalyst-filled carbon anode in helium background was used for the synthesis of carbon nanoparticles. In this paper, we present the results of numerical simulation of carbon arc discharges with arc current varying from 10 A to 100 A in a background gas pressure of 68 kPa. Anode sublimation rate and current voltage characteristics are compared with experiments. Distribution of temperature and species density, which is important for the estimation of the growth of nanoparticles, is obtained. The probable location of nanoparticle growth region is identified based on the temperature range for the formation of catalyst clusters.

Kundrapu, M.; Keidar, M. [Department of Mechanical and Aerospace Engineering, George Washington University, Washington, DC 20052 (United States)

2012-07-15T23:59:59.000Z

419

Advanced numerical methods in mesh generation and mesh adaptation  

SciTech Connect (OSTI)

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

420

ASSIMILATION OF DOPPLER RADAR DATA INTO NUMERICAL WEATHER MODELS  

SciTech Connect (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

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 techniques for coupled neutronic/thermal-hydraulic reactor calculations  

SciTech Connect (OSTI)

The solution of coupled neutronic/thermal-hydraulic nuclear reactor calculations is achieved through an iterative procedure that treats the components of the calculations in a relatively decoupled fashion. This entails an alternation between the neutronic and thermal-hydraulic components of the calculation while using the most recent estimates of the neutron cross sections, as determined by the thermal-hydraulic feedback relationships. Although this decoupled approach is typically convergent, it has been demonstrated that the rate of convergence is quite inconsistent. As a result of these limitations, an effort has been directed toward the development of numerical techniques that more closely approximate a truly coupled solution.

Betts, C.M.; Kulas, M.M.; Klein, A.C. [Oregon State Univ., Corvallis, OR (United States)] [and others

1995-12-31T23:59:59.000Z

422

Gamma emission in precompound reactions: 2, Numerical application  

SciTech Connect (OSTI)

The analytically obtained results of the preceding paper on capture gamma ray reactions are used for a direct numerical calculation. It turns out that this formulation allows for a parameter free description of gamma emission in precompound reactions. As an example we choose reactions induced by 14.1 MeV neutrons incident on {sup 59}CO, {sup 93}Nb and {sup 181}Ta. The individual contributions of different terms to the total cross section are discussed in detail and a comparison to experimental data is pursued.

Herman, M.; Reffo, G. (Ente Nazionale Energie Alternative, Bologna (Italy)); Hoering, A. (Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany) Washington Univ., Seattle, WA (United States). Inst. for Nuclear Theory)

1992-01-01T23:59:59.000Z

423

Gamma emission in precompound reactions: 2, Numerical application  

SciTech Connect (OSTI)

The analytically obtained results of the preceding paper on capture gamma ray reactions are used for a direct numerical calculation. It turns out that this formulation allows for a parameter free description of gamma emission in precompound reactions. As an example we choose reactions induced by 14.1 MeV neutrons incident on {sup 59}CO, {sup 93}Nb and {sup 181}Ta. The individual contributions of different terms to the total cross section are discussed in detail and a comparison to experimental data is pursued.

Herman, M.; Reffo, G. [Ente Nazionale Energie Alternative, Bologna (Italy); Hoering, A. [Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany)]|[Washington Univ., Seattle, WA (United States). Inst. for Nuclear Theory

1992-09-01T23:59:59.000Z

424

Development of a numerical comparator for protective relaying: Part 2  

SciTech Connect (OSTI)

This paper describes testing of the new numerical relaying concept. The new technique is applied to distance relaying to offer improved reliability and security of the relay, and improve the speed of relay operation. To validate the algorithm`s performance, the scheme was analyzed under a variety of test conditions and compared with conventional relay concepts. This paper presents the results of the testing and shows that the new relaying scheme operated with a high level of security and dependability for all of the test cases. The tests show improvements that the new scheme can offer in comparison to the conventional schemes.

Hart, D.; Novosel, D. [ABB-TTI, Raleigh, NC (United States)] [ABB-TTI, Raleigh, NC (United States); Calero, F.; Udren, E.; Yang, L. [ABB Relay Div., Coral Springs, FL (United States)] [ABB Relay Div., Coral Springs, FL (United States)

1996-07-01T23:59:59.000Z

425

Numerical simulation of oscillating magnetospheres with resistive electrodynamics  

E-Print Network [OSTI]

We present a model of the magnetosphere around an oscillating neutron star. The electromagnetic fields are numerically solved by modeling electric charge and current induced by the stellar torsional mode, with particular emphasis on outgoing radiation passing through the magnetosphere. The current is modeled using Ohm's law, whereby an increase in conductivity results in an increase in the induced current. As a result, the fields are drastically modified, and energy flux is thereby enhanced. This behavior is however localized in the vicinity of the surface since the induced current disappears outwardly in our model, in which the exterior is assumed to gradually approach a vacuum.

Kojima, Yasufumi

2014-01-01T23:59:59.000Z

426

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

427

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

428

Advanced numerical methods for analysis and design in aircraft aerodynamics  

Science Journals Connector (OSTI)

A review is presented of developments in recent years in computational methods for aerodynamic design and analysis. The discussion is mainly influenced by the industrial requirements and developments at Dornier. The need and use of computational aerodynamics in the design of aircraft and missile configurations is explored through several examples. These include synthesis-programs and predesign and evaluation work of aircraft and missile weapon systems, airfoil and high lift analysis and deign methodologies, three-dimensional transport- and fighter aircraft wing-body analysis methods for the complete speed range from subsonic to supersonic speed even including leading edge vortex flows, engine-inlet flows and interference problems. Besides the importance of advanced numerical schemes and fast large computers the cost-limiting factor of complex geometry handling and data pre- and post-processing is discussed. The use of these numerical methods has proved to substantially increase aircraft performance capabilities while reducing risk, flow time, and testing requirements and thus total costs. At the same time such methods are in use to analyse and improve current and future wind tunnel limitations like wall effects, flow angularity, and Reynolds number.

W. Schmidt

1986-01-01T23:59:59.000Z

429

MAGNETIZATION DEGREE OF GAMMA-RAY BURST FIREBALLS: NUMERICAL STUDY  

SciTech Connect (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

430

Stable 3-level leapfrog integration in numerical relativity  

E-Print Network [OSTI]

The 3-level leapfrog time integration algorithm is an attractive choice for numerical relativity simulations since it is time-symmetric and avoids non-physical damping. In Newtonian problems without velocity dependent forces, this method enjoys the advantage of long term stability. However, for more general differential equations, whether ordinary or partial, delayed onset numerical instabilities can arise and destroy the solution. A known cure for such instabilities appears to have been overlooked in many application areas. We give an improved cure ("deloused leapfrog") that both reduces memory demands (important for 3+1 dimensional wave equations) and allows for the use of adaptive timesteps without a loss in accuracy. We show both that the instability arises and that the cure we propose works in highly relativistic problems such as tightly bound geodesics, spatially homogeneous spacetimes, and strong gravitational waves. In the gravitational wave test case (polarized waves in a Gowdy spacetime) the deloused leapfrog method was five to eight times less CPU costly at various accuracies than the implicit Crank-Nicholson method, which is not subject to this instability.

Kimberly C. B. New; Keith Watt; Charles W. Misner; Joan M. Centrella

1998-01-30T23:59:59.000Z

431

Numerical Simulation of Flood Levels for Tropical Rivers  

Science Journals Connector (OSTI)

Flood forecasting is important for flood damage reduction. As a result of advances in the numerical methods and computer technologies, many mathematical models have been developed and used for hydraulic simulation of the flood. These simulations usually include the prediction of the flood width and depth along a watercourse. Results obtained from the application of hydraulic models will help engineers to take precautionary measures to minimize flood damage. Hydraulic models were used to simulate the flood can be classified into dynamic hydraulic models and static hydraulic models. The HEC-2 static hydraulic model was used to predict water surface profiles for Linggi river and Langat river in Malaysia. The model is based on the numerical solution of the one dimensional energy equation of the steady gradually varied flow using the iteration technique. Calibration and verification of the HEC-2 model were conducted using the recorded data for both rivers. After calibration, the model was applied to predict the water surface profiles for Q10, Q30, and Q100 along the watercourse of the Linggi river. The water surface profile for Q200 for Langat river was predicted. The predicted water surface profiles were found in agreement with the recorded water surface profiles. The value of the maximum computed absolute error in the predicted water surface profile was found to be 500 mm while the minimum absolute error was 20 mm only.

Thamer Ahmed Mohammed; Salim Said; Mohd Zohadie Bardaie; Shah Nor Basri

2011-01-01T23:59:59.000Z

432

Management of numerical control data from the ICEM DDN products  

SciTech Connect (OSTI)

NCPART is a procedure developed by the Numerical Control Department at Bendix Kansas City Division to handle the entry to and exit from ICEM DDN, and process all of the local files output by ICEM DDN. The NCPART procedure is menu driven, and provides automatic access to ICEM DDN and any files necessary to process information with ICEM for Numerical Control users. Basically, the procedure handles all of the ICEM DDN operations that involve operating system commands, and frees the NC Programmer to concentrate on his/her work as a programmer. Most NC Programmers at BKC are well versed in the use of operating system commands for attaching and cataloging files, but the use of procedures makes the programmer's job much simpler, especially in the case of ICEM, where multiple files must be present in order to take advantage of the available features. Also, much is dependent on what an individual plans to do once in ICEM, because different applications require different files, and all of these files may not be needed at any given user session.

Rossini, B.F.

1987-04-01T23:59:59.000Z

433

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

2008-11-04T23:59:59.000Z

434

THE NUMERICAL APPROXIMATION FOR THE INTEGRABILITY PROBLEM AND THE MEASURE OF WELFARE CHANGES, AND ITS APPLICATIONS  

E-Print Network [OSTI]

This dissertation mainly studied on numerical approximation methods as a solution of the integrability problem and the measure of welfare changes, and demonstrated how numerical algorithms can be applied in empirical studies ...

Lim, Sung Jin

2012-01-01T23:59:59.000Z

435

CFD Numerical Simulation of Vortex-Induced Vibration of a Stay Cable under a Wind Profile  

Science Journals Connector (OSTI)

VIV (Vortex-induced vibration) of a stay cable subjected to a wind profile is numerically simulated through combining CFD ... numerical model. Under a profile of mean wind speed, unsteady aerodynamic lift coeffic...

Wenli Chen; Hui Li

2009-01-01T23:59:59.000Z

436

Numerical evidence of turbulence generated by non-breaking surface waves  

Science Journals Connector (OSTI)

Numerical simulation of monochromatic surface waves propagating over a turbulent field is conducted to reveal the mechanism of turbulence production by non-breaking waves. The numerical model solves the primitive equations subject to the fully ...

Wu-ting Tsai; Shi-ming Chen; Guan-hung Lu

437

Applied Numerical Mathematics 58 (2008) 871883 www.elsevier.com/locate/apnum  

E-Print Network [OSTI]

Applied Numerical Mathematics 58 (2008) 871­883 www.elsevier.com/locate/apnum Updating the QR / Applied Numerical Mathematics 58 (2008) 871­883 preliminary computation of QR decompositions

Gutknecht, Martin H.

438

False diffusion in numerical simulation of combustion processes in tangential-fired furnace  

Science Journals Connector (OSTI)

Numerical simulation serves as one of the most important tools for analyzing coal combustion in Tangentially Fired Furnaces (TFF) with NUMERICAL FALSE DIFFUSION as one key problem that degrades the simulation acc...

Xuchang Xu; Zhigang Wang; Yuqun Zhuo…

2007-11-01T23:59:59.000Z

439

A study of a two-stroke free piston linear engine using numerical analysis  

Science Journals Connector (OSTI)

We studied a two-stroke free piston linear engine by numerical models and simulation. The numerical ... ratio, reciprocating mass, spark timing, and spring stiffness on the operating characteristics as well as pe...

Nguyen Ba Hung; Ock Taeck Lim

2014-04-01T23:59:59.000Z

440

An investigation of numerical dispersion in the hot water injection process  

E-Print Network [OSTI]

dispersion is important in the simulation of the hot water injection process with heat loss. Numerical results are compared to the analytical solution of the simple convective-diffusion problem and Lauwerier's analytical solution to the hot water... simulated, then some type of method for controlling numerical dispersion will have to be implemented. It is obvious from the numerical results that numerical dispersion is affected by injection velocity and distance travelled, but these variables do...

McVay, Duane Allen

2012-06-07T23:59:59.000Z

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

Numerical study of high heat ux pool boiling heat transfer Ying He a,*, Masahiro Shoji b  

E-Print Network [OSTI]

Numerical study of high heat ¯ux pool boiling heat transfer Ying He a,*, Masahiro Shoji b , Shigeo simulation model of boiling heat transfer is proposed based on a numerical macrolayer model [S. Maruyama, M. Shoji, S. Shimizu, A numerical simulation of transition boiling heat transfer, in: Proceedings

Maruyama, Shigeo

442

The Numerical Modelling Research and Development Division is responsible for research into and develop-  

E-Print Network [OSTI]

into and develop- ment of numerical weather prediction models and other meteorological applications, that are opera in the field of numerical weather prediction: atmospheric and oceanographic modelling, physical and statistical132 The Numerical Modelling Research and Development Division is responsible for research

Haak, Hein

443

24 More Years of Numerical Weather Prediction: A Model Performance Model  

E-Print Network [OSTI]

24 More Years of Numerical Weather Prediction: A Model Performance Model Gerard Cats May 26, 2008 Abstract For two formulations of currently usual numerical weather prediction models the evolution in such a model is much 1 #12;24 More Years of Numerical Weather Prediction Gerard Cats higher than in a sis

Stoffelen, Ad

444

Evaluating the ability of a numerical weather prediction model to forecast tracer concentrations during ETEX 2  

E-Print Network [OSTI]

Evaluating the ability of a numerical weather prediction model to forecast tracer concentrations an operational numerical weather prediction model to forecast air quality are also investigated. These potential a numerical weather prediction (NWP) model independently of the CTM. The NWP output is typically archived

Dacre, Helen

445

USING LEARNING MACHINES TO CREATE SOLAR RADIATION MAPS FROM NUMERICAL WEATHER PREDICTION MODELS,  

E-Print Network [OSTI]

USING LEARNING MACHINES TO CREATE SOLAR RADIATION MAPS FROM NUMERICAL WEATHER PREDICTION MODELS simulation by means of a Numerical Weather Prediction Model (NWP), Skiron. After that, we have made spatial solar resource map. 2.1. Meteorological simulation The numerical weather prediction model used is SKIRON

Paris-Sud XI, Université de

446

Temporal Changes in Wind as Objects for Evaluating Mesoscale Numerical Weather Prediction  

E-Print Network [OSTI]

a method of evaluating numerical weather prediction models by comparing the characteristics of temporal for biases in features forecast by the model. 1. Introduction Verification of numerical weather predictionTemporal Changes in Wind as Objects for Evaluating Mesoscale Numerical Weather Prediction DARAN L

Knievel, Jason Clark

447

Numerical simulation of turbulence interaction noise applied to a serrated airfoil  

E-Print Network [OSTI]

Numerical simulation of turbulence interaction noise applied to a serrated airfoil Vincent CLAIR, Gabriel Reboul, Thomas Le Garrec. Numerical simulation of turbulence interaction noise applied, des laboratoires publics ou priv´es. #12;Numerical simulation of turbulence interaction noise applied

448

A REGULARIZATION METHOD FOR THE NUMERICAL SOLUTION OF ELLIPTIC BOUNDARY CONTROL PROBLEMS  

E-Print Network [OSTI]

, they are validated by comparing the regularization technique with standard numerical codes based on the discretize, the restriction to N = 2 is more or less needed, again. It is well known that the numerical treatment of state complicates the numerical treatment of the problems. On the other hand, in the analysis one is faced with some

Tröltzsch, Fredi

449

Numerical Age Computation of the Antarctic Ice Sheet for Dating Deep Ice Cores  

E-Print Network [OSTI]

Numerical Age Computation of the Antarctic Ice Sheet for Dating Deep Ice Cores Bernd M¨ugge1 for the computation of the age of ice is discussed within the frame of numerical ice sheet modelling. The first method of a numerical diffusion term to stabilize the solution and therefore produces arbitrary results in a near

Calov, Reinhard

450

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

451

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

452

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

453

Accurate Numerical Simulations Of Chemical Phenomena Involved in Energy  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

454

Integrated Numerical Modeling Process for Evaluating Automobile Climate Control Systems  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

455

An acoustic numerical analysis of single rotation torpedo propeller  

E-Print Network [OSTI]

&vers&ty C'hatrman of Adv&sorv C'ummittee Dr Kenneth D Ivnrkan 5 numerical study of the acoust&c field asscsciated ivith a t?rped& pr &!&cll&-r hav&ng fnur blades i&as accomplished thr&?&gh the application nf Su& ci method The Succi acnustic analvsi ivas m... I-d&g&t se?es air!'n&1 data ba. e to calculate the lift and &&rag f ir each blade segment, These values vere then converted ti thrust and torque radial distr&butinns. Alsn a rav tracing techniq?e ivas inc&tip&i&at&. c! int& tlic Succi numencal...

Kim, Soo Yong

1989-01-01T23:59:59.000Z

456

Simple numerical simulation for liquid dominated geothermal reservoir  

SciTech Connect (OSTI)

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 Darcy`s 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, D.; Sutrisno; Sudjamiko [Gadjah Mada Univ., Yogyakarta (Indonesia)] [and others

1996-12-31T23:59:59.000Z

457

Simple numerical simulation for liquid dominated geothermal reservoir  

SciTech Connect (OSTI)

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 Darcy’s 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

458

Numerical Simulation and Optimazation of Small Scale LNG Plant  

Science Journals Connector (OSTI)

The LNG20 is a small?scale natural gas liquefier. Its capacity is 20 cube meters LNG per day. This liquefier could be used for the pipeline gas coalbed gas oil field gas liquefaction and peakshaving plant for town gas gate station and natural gas power plant. Two processing cycles are applied to LNG20 nitrogen expander cycle and mixed refrigerant cycle. In this report two feed gases are the target sources; one is the pipeline gas in “West?to?east pipeline gas” in a gate station in Zhejiang province and coalbed gas in Northeast China. The numerical simulation and optimization for the LNG20 were carried out to obtain the design parameters.

H. Y. Li; L. X. Jia; Q. H. Fan; Q. S. Yin

2006-01-01T23:59:59.000Z

459

Numerical tools applied to power reactor noise analysis  

SciTech Connect (OSTI)

In this paper, the development of numerical tools allowing the determination of the neutron noise in power reactors is reported. These tools give the space-dependence of the fluctuations of the neutron flux induced by fluctuating properties of the medium in the 2-group diffusion approximation and in a 2-dimensional representation of heterogeneous systems. Some applications of these tools to power reactor noise analysis are then described. These applications include the unfolding of the noise source from the resulting neutron noise measured at a few discrete locations throughout the core, the study of the space-dependence of the Decay Ratio in Boiling Water Reactors, the noise-based estimation of the Moderator Temperature Coefficient of reactivity in Pressurized Water Reactors, the modeling of shell-mode core barrel vibrations in Pressurized Water Reactors, and the investigation of the validity of the point-kinetic approximation in subcritical systems. (authors)

Demaziere, C.; Pazsit, I. [Chalmers Univ. of Technology, Dept. of Nuclear Engineering, SE-412 96 Goeteborg (Sweden)

2006-07-01T23:59:59.000Z

460

Numerical simulation of the Tayler instability in liquid metals  

E-Print Network [OSTI]

The electrical current through an incompressible, viscous and resistive liquid conductor produces an azimuthal magnetic field that becomes unstable when the corresponding Hartmann number exceeds a critical value in the order of 20. This Tayler instability, which is not only discussed as a key ingredient of a non-linear stellar dynamo model (Tayler-Spruit dynamo), but also as a limiting factor for the maximum size of large liquid metal batteries, was recently observed experimentally in a column of a liquid metal (Seilmayer et al., Phys. Rev. Lett. 108, 244501, 2012}. On the basis of an integro-differential equation approach, we have developed a fully three-dimensional numerical code, and have utilized it for the simulation of the Tayler instability at typical viscosities and resistivities of liquid metals. The resulting growth rates are in good agreement with the experimental data. We illustrate the capabilities of the code for the detailed simulation of liquid metal battery problems in realistic geometries.

Weber, Norbert; Stefani, Frank; Weier, Tom; Wondrak, Thomas

2012-01-01T23:59:59.000Z

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.
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461

A numerical model of aerosol scavenging: Part 1, Microphysics parameterization  

SciTech Connect (OSTI)

We have developed a three-dimensional numerical model (OCTET) to simulate the dynamics and microphysics of clouds and the transport, diffusion and precipitation scavenging of aerosol particles. In this paper we describe the cloud microphysics and scavenging parameterizations. The representation of cloud microphysics is a bulk- water parameterization which includes water vapor and five types of hydrometeors (cloud droplets, rain drops, ice crystals, snow, and graupel). A parallel parameterization represents the scavenging interactions between pollutant particles and hydrometeors including collection of particles because of condensation nucleation, Brownian and phoretic attachment, and inertial capture, resuspension because of evaporation and sublimation; and transfer interactions where particles collected by one type of hydrometeor are transferred to another type of freezing, melting, accretion, riming and autoconversion.

Molenkamp, C.R.; Bradley, M.M.

1991-09-01T23:59:59.000Z

462

Combined Numerical-experimental Study of Dual Fuel Diesel Engine  

Science Journals Connector (OSTI)

Abstract In the present paper the authors discuss the effect of different fuel ratios on the performance and emission levels of a common rail diesel engine supplied with natural gas and diesel oil. Dual fuel operation is characterized by a diesel pilot injection to start combustion in an intake port premixed NG/air mixture. The combined numerical – experimental study of the dual fuel diesel engine that is carried out in this paper aims at the evaluation of the CFD potential to predict the main features of this particular engine operation. The experimental investigations represent a tool for validating such a potential and for highlighting, at the same time, the major problems that arise from the actual engine operation with different NG / diesel oil fuel ratios.

Carmelina Abagnale; Maria Cristina Cameretti; Luigi De Simio; Michele Gambino; Sabatino Iannaccone; Raffaele Tuccillo

2014-01-01T23:59:59.000Z

463

Thermoeconomic analysis of a CHP system by iterative numerical techniques  

SciTech Connect (OSTI)

This paper deals with the determination of the thermoeconomic optimum conditions for a constant space heat load imposed on the air coil of a combined heating and power (CHP) system using iterative numerical techniques. From the thermodynamic relations and equations derived from the energy balance and heat exchanger characteristics, an objective function and constraining equations are obtained. A computer program is developed based on the Redlich-Kwong equation of state to estimate the thermodynamic properties of the refrigerant fluid R-22. Additional computer subroutines are developed to perform thermodynamic and thermoeconomic optimization. Optimum values of the operating variables are identified at thermodynamic and thermoeconomic optimum conditions. Results show that the total irreversibilities produced in the system and the cost of fuel consumption are minimum at thermodynamic optimum conditions, but the annual cost of owning and operating the system is minimum at the thermoeconomic optimum condition, which is 34% lower than at the thermodynamic optimum condition.

Damshala, P.R.

2000-07-01T23:59:59.000Z

464

The implementation of substation automation coordinated with numerical protection relaying  

SciTech Connect (OSTI)

During 1987 Eskom embarked on a process of defining user requirements in the area of substation control. This ultimately resulted in a project being established for the procurement and development of a new generation of substation control equipment. At the same time it was decided to establish a new generation of protection schemes for transmission substations, based on numerical protection relays. From the outset, a high degree of coordination was planned between the substation control and protection equipment. Development contracts were placed with suppliers during late 1990 for the protection schemes and during early 1991 for the substation control equipment. These contracts are nearing completion and the first large installations will commence during 1994. The Transmission Group has committed to employing this new technology in all new substations and all substations to be refurbished. This paper discusses the concept of coordinated substation control and protection and gives insight into implementation issues and functional compromises which had to be made to meet project deadlines.

Welie, G. van; Carolin, T.

1994-12-31T23:59:59.000Z

465

Spherically symmetric cosmological spacetimes with dust and radiation — numerical implementation  

SciTech Connect (OSTI)

We present new numerical cosmological solutions of the Einstein Field Equations. The spacetime is spherically symmetric with a source of dust and radiation approximated as a perfect fluid. The dust and radiation are necessarily non-comoving due to the inhomogeneity of the spacetime. Such a model can be used to investigate non-linear general relativistic effects present during decoupling or big-bang nucleosynthesis, as well as for investigating void models of dark energy with isocurvature degrees of freedom. We describe the full evolution of the spacetime as well as the redshift and luminosity distance for a central observer. After demonstrating accuracy of the code, we consider a few example models, and demonstrate the sensitivity of the late time model to the degree of inhomogeneity of the initial radiation contrast.

Lim, Woei Chet [Department of Mathematics, University of Waikato, Private Bag 3105, Hamilton 3240 (New Zealand); Regis, Marco [Dipartimento di Fisica, Università di Torino and INFN, Torino (Italy); Clarkson, Chris, E-mail: wclim@waikato.ac.nz, E-mail: regis@to.infn.it, E-mail: chris.clarkson@gmail.com [Astrophysics, Cosmology and Gravity Centre, and Department of Mathematics and Applied Mathematics, University of Cape Town, Rondebosch 7701, Cape Town (South Africa)

2013-10-01T23:59:59.000Z

466

Flow focusing in unsaturated fracture networks: A numerical investigation  

SciTech Connect (OSTI)

A numerical modeling study is presented to investigate flow-focusing phenomena in a large-scale fracture network, constructed using field data collected from the unsaturated zone of Yucca Mountain, Nevada, the proposed repository site for high-level nuclear waste. The two-dimensional fracture network for an area of 100 m x 150 m contains more than 20,000 fractures. Steady-state unsaturated flow in the fracture network is investigated for different boundary conditions and rock properties. Simulation results indicate that flow paths are generally vertical, and that horizontal fractures mainly provide pathways between neighboring vertical paths. In addition to fracture properties, flow-focusing phenomena are also affected by rock-matrix permeability, with lower matrix permeability leading to a high degree of flow focusing. The simulation results further indicate that the average spacing between flow paths in a layered system tends to increase and flow tends to becomes more focused, with depth.

Zhang, Keni; Wu, Yu-Shu; Bodvarsson, G.S.; Liu, Hui-Hai

2003-04-17T23:59:59.000Z

467

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

468

Los Alamos National Laboratory communicators capture numerous awards from  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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

469

Numerical study of natural convection in fully open tilted cavities  

SciTech Connect (OSTI)

A numerical simulation of two-dimensional laminar natural convection in a fully open tilted square cavity with an isothermally heated back wall is conducted. The remaining two walls of the cavity are adiabatic. Steady-state solutions are presented for Grashof numbers between 10{sup 2} and 10{sup 5} and for tilt angles ranging from {minus}60{degree} to 90{degree} (where 90{degree} represents a cavity with the opening facing down). The fluid properties are assumed to be constant except for the density variation with temperature that gives rise to the buoyancy forces, which is treated by the Boussinesq approximation. The fluid concerned is air with Prandtl number fixed at 0.71. The governing equations are expressed in a normalized primitive variables formulation. Numerical predictions of the velocity and temperature fields are obtained using the finite-volume-based power law (SIMPLER: Semi-Implicit Method for Pressure-Linked Equations Revised) algorithm. For a vertical open cavity ({alpha} = 0{degree}), the algorithm generated results that were in good agreement with those previously published. Flow patterns and isotherms are shown in order to give a better understanding of the heat transfer and flow mechanisms inside the cavity. Effects of the controlling parameters-Grashof number and tilt angle-on the heat transfer (average Nusselt number) are presented and analyzed. The results also revealed that the open-cavity Nusselt number approaches the flat-plate solution when either Grashof number or tilt angle increases. In addition, a correlation of the Nusselt number in terms of the Grashof number and tilt angle is developed and presented; a comparison is made with available data from other literature.

Elsayed, M.M.; Al-Najem, N.M.; El-Refaee, M.M.; Noor, A.A.

1999-09-01T23:59:59.000Z

470

Experimental and numerical studies of high-velocity impact fragmentation  

SciTech Connect (OSTI)

Developments are reported in both experimental and numerical capabilities for characterizing the debris spray produced in penetration events. We have performed a series of high-velocity experiments specifically designed to examine the fragmentation of the projectile during impact. High-strength, well-characterized steel spheres (6.35 mm diameter) were launched with a two-stage light-gas gun to velocities in the range of 3 to 5 km/s. Normal impact with PMMA plates, thicknesses of 0.6 to 11 mm, applied impulsive loads of various amplitudes and durations to the steel sphere. Multiple flash radiography diagnostics and recovery techniques were used to assess size, velocity, trajectory and statistics of the impact-induced fragment debris. Damage modes to the primary target plate (plastic) and to a secondary target plate (aluminum) were also evaluated. Dynamic fragmentation theories, based on energy-balance principles, were used to evaluate local material deformation and fracture state information from CTH, a three-dimensional Eulerian solid dynamics shock wave propagation code. The local fragment characterization of the material defines a weighted fragment size distribution, and the sum of these distributions provides a composite particle size distribution for the steel sphere. The calculated axial and radial velocity changes agree well with experimental data, and the calculated fragment sizes are in qualitative agreement with the radiographic data. A secondary effort involved the experimental and computational analyses of normal and oblique copper ball impacts on steel target plates. High-resolution radiography and witness plate diagnostics provided impact motion and statistical fragment size data. CTH simulations were performed to test computational models and numerical methods.

Kipp, M.E.; Grady, D.E.; Swegle, J.W.

1993-08-01T23:59:59.000Z

471

Numerical Relativity in Spherical Polar Coordinates: Off-center Simulations  

E-Print Network [OSTI]

We have recently presented a new approach for numerical relativity simulations in spherical polar coordinates, both for vacuum and for relativistic hydrodynamics. Our approach is based on a reference-metric formulation of the BSSN equations, a factoring of all tensor components, as well as a partially implicit Runge-Kutta method, and does not rely on a regularization of the equations, nor does it make any assumptions about the symmetry across the origin. In order to demonstrate this feature we present here several off-centered simulations, including simulations of single black holes and neutron stars whose center is placed away from the origin of the coordinate system, as well as the asymmetric head-on collision of two black holes. We also revisit our implementation of relativistic hydrodynamics and demonstrate that a reference-metric formulation of hydrodynamics together with a factoring of all tensor components avoids problems related to the coordinate singularities at the origin and on the axes. As a particularly demanding test we present results for a shock wave propagating through the origin of the spherical polar coordinate system.

Thomas W. Baumgarte; Pedro J. Montero; Ewald Müller

2015-01-21T23:59:59.000Z

472

Numerical Relativity in Spherical Polar Coordinates: Off-center Simulations  

E-Print Network [OSTI]

We have recently presented a new approach for numerical relativity simulations in spherical polar coordinates, both for vacuum and for relativistic hydrodynamics. Our approach is based on a reference-metric formulation of the BSSN equations, a factoring of all tensor components, as well as a partially implicit Runge-Kutta method, and does not rely on a regularization of the equations, nor does it make any assumptions about the symmetry across the origin. In order to demonstrate this feature we present here several off-centered simulations, including simulations of single black holes and neutron stars whose center is placed away from the origin of the coordinate system, as well as the asymmetric head-on collision of two black holes. We also revisit our implementation of relativistic hydrodynamics and demonstrate that a reference-metric formulation of hydrodynamics together with a factoring of all tensor components avoids problems related to the coordinate singularities at the origin and on the axes. As a parti...

Baumgarte, Thomas W; Müller, Ewald

2015-01-01T23:59:59.000Z

473

DIPOLE COLLAPSE AND DYNAMO WAVES IN GLOBAL DIRECT NUMERICAL SIMULATIONS  

SciTech Connect (OSTI)

Magnetic fields of low-mass stars and planets are thought to originate from self-excited dynamo action in their convective interiors. Observations reveal a variety of field topologies ranging from large-scale, axial dipoles to more structured magnetic fields. In this article, we investigate more than 70 three-dimensional, self-consistent dynamo models in the Boussinesq approximation obtained by direct numerical simulations. The control parameters, the aspect ratio, and the mechanical boundary conditions have been varied to build up this sample of models. Both strongly dipolar and multipolar models have been obtained. We show that these dynamo regimes in general can be distinguished by the ratio of a typical convective length scale to the Rossby radius. Models with a predominantly dipolar magnetic field were obtained, if the convective length scale is at least an order of magnitude larger than the Rossby radius. Moreover, we highlight the role of the strong shear associated with the geostrophic zonal flow for models with stress-free boundary conditions. In this case the above transition disappears and is replaced by a region of bistability for which dipolar and multipolar dynamos coexist. We interpret our results in terms of dynamo eigenmodes using the so-called test-field method. We can thus show that models in the dipolar regime are characterized by an isolated 'single mode'. Competing overtones become significant as the boundary to multipolar dynamos is approached. We discuss how these findings relate to previous models and to observations.

Schrinner, Martin; Dormy, Emmanuel [MAG (ENS/IPGP), LRA, Ecole Normale Superieure, 24 Rue Lhomond, 75252 Paris Cedex 05 (France); Petitdemange, Ludovic, E-mail: martin@schrinner.eu [Previously at Max-Planck-Institut fuer Astronomie, Koenigstuhl 17, 69117 Heidelberg, Germany. (Germany)

2012-06-20T23:59:59.000Z

474

Introduction to finite-difference methods for numerical fluid dynamics  

SciTech Connect (OSTI)

This work is intended to be a beginner`s exercise book for the study of basic finite-difference techniques in computational fluid dynamics. It is written for a student level ranging from high-school senior to university senior. Equations are derived from basic principles using algebra. Some discussion of partial-differential equations is included, but knowledge of calculus is not essential. The student is expected, however, to have some familiarity with the FORTRAN computer language, as the syntax of the computer codes themselves is not discussed. Topics examined in this work include: one-dimensional heat flow, one-dimensional compressible fluid flow, two-dimensional compressible fluid flow, and two-dimensional incompressible fluid flow with additions of the equations of heat flow and the {Kappa}-{epsilon} model for turbulence transport. Emphasis is placed on numerical instabilities and methods by which they can be avoided, techniques that can be used to evaluate the accuracy of finite-difference approximations, and the writing of the finite-difference codes themselves. Concepts introduced in this work include: flux and conservation, implicit and explicit methods, Lagrangian and Eulerian methods, shocks and rarefactions, donor-cell and cell-centered advective fluxes, compressible and incompressible fluids, the Boussinesq approximation for heat flow, Cartesian tensor notation, the Boussinesq approximation for the Reynolds stress tensor, and the modeling of transport equations. A glossary is provided which defines these and other terms.

Scannapieco, E.; Harlow, F.H.

1995-09-01T23:59:59.000Z

475

Numerical atomic basis orbitals from H to Kr  

Science Journals Connector (OSTI)

We present a systematic study for numerical atomic basis orbitals ranging from H to Kr, which could be used in large scale O(N) electronic structure calculations based on density-functional theories (DFT). The comprehensive investigation of convergence properties with respect to our primitive basis orbitals provides a practical guideline in an optimum choice of basis sets for each element, which well balances the computational efficiency and accuracy. Moreover, starting from the primitive basis orbitals, a simple and practical method for variationally optimizing basis orbitals is presented based on the force theorem, which enables us to maximize both the computational efficiency and accuracy. The optimized orbitals well reproduce convergent results calculated by a larger number of primitive orbitals. As illustrations of the orbital optimization, we demonstrate two examples: the geometry optimization coupled with the orbital optimization of a C60 molecule and the preorbital optimization for a specific group such as proteins. They clearly show that the optimized orbitals significantly reduce the computational efforts, while keeping a high degree of accuracy, thus indicating that the optimized orbitals are quite suitable for large scale DFT calculations.

T. Ozaki and H. Kino

2004-05-28T23:59:59.000Z

476

Determination of hydrogen cluster velocities and comparison with numerical calculations  

SciTech Connect (OSTI)

The use of powerful hydrogen cluster jet targets in storage ring experiments led to the need of precise data on the mean cluster velocity as function of the stagnation temperature and pressure for the determination of the volume density of the target beams. For this purpose a large data set of hydrogen cluster velocity distributions and mean velocities was measured at a high density hydrogen cluster jet target using a trumpet shaped nozzle. The measurements have been performed at pressures above and below the critical pressure and for a broad range of temperatures relevant for target operation, e.g., at storage ring experiments. The used experimental method is described which allows for the velocity measurement of single clusters using a time-of-flight technique. Since this method is rather time-consuming and these measurements are typically interfering negatively with storage ring experiments, a method for a precise calculation of these mean velocities was needed. For this, the determined mean cluster velocities are compared with model calculations based on an isentropic one-dimensional van der Waals gas. Based on the obtained data and the presented numerical calculations, a new method has been developed which allows to predict the mean cluster velocities with an accuracy of about 5%. For this two cut-off parameters defining positions inside the nozzle are introduced, which can be determined for a given nozzle by only two velocity measurements.

Täschner, A.; Köhler, E.; Ortjohann, H.-W.; Khoukaz, A. [Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster (Germany)] [Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster (Germany)

2013-12-21T23:59:59.000Z

477

Evolutions in 3D numerical relativity using fixed mesh refinement  

E-Print Network [OSTI]

We present results of 3D numerical simulations using a finite difference code featuring fixed mesh refinement (FMR), in which a subset of the computational domain is refined in space and time. We apply this code to a series of test cases including a robust stability test, a nonlinear gauge wave and an excised Schwarzschild black hole in an evolving gauge. We find that the mesh refinement results are comparable in accuracy, stability and convergence to unigrid simulations with the same effective resolution. At the same time, the use of FMR reduces the computational resources needed to obtain a given accuracy. Particular care must be taken at the interfaces between coarse and fine grids to avoid a loss of convergence at higher resolutions, and we introduce the use of "buffer zones" as one resolution of this issue. We also introduce a new method for initial data generation, which enables higher-order interpolation in time even from the initial time slice. This FMR system, "Carpet", is a driver module in the freely available Cactus computational infrastructure, and is able to endow generic existing Cactus simulation modules ("thorns") with FMR with little or no extra effort.

Erik Schnetter; Scott H. Hawley; Ian Hawke

2004-03-02T23:59:59.000Z

478

Relativistic radiation magnetohydrodynamics in dynamical spacetimes: Numerical methods and tests  

SciTech Connect (OSTI)

Many systems of current interest in relativistic astrophysics require a knowledge of radiative transfer in a magnetized gas flowing in a strongly curved, dynamical spacetime. Such systems include coalescing compact binaries containing neutron stars or white dwarfs, disks around merging black holes, core-collapse supernovae, collapsars, and gamma-ray burst sources. To model these phenomena, all of which involve general relativity, radiation (photon and/or neutrino), and magnetohydrodynamics (MHD), we have developed a general relativistic code capable of evolving MHD fluids and radiation in dynamical spacetimes. Our code solves the coupled Einstein-Maxwell-MHD-radiation system of equations both in axisymmetry and in full 3+1 dimensions. We evolve the metric by integrating the BSSN (Baumgarte-Shapiro-Shibata-Nakamura) equations, and use a conservative, high-resolution shock-capturing scheme to evolve both the MHD and radiation moment equations. In this paper, we implement our scheme for optically thick gases and gray-body opacities. Our code gives accurate results in a suite of tests involving radiating shocks and nonlinear waves propagating in Minkowski spacetime. In addition, to test our code's ability to evolve the relativistic radiation-MHD equations in strong-field dynamical spacetimes, we study 'thermal Oppenheimer-Snyder collapse' to a black hole and find good agreement between analytic and numerical solutions.

Farris, Brian D.; Li, T.K.; Liu, Y.T.; Shapiro, Stuart L. [Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)

2008-07-15T23:59:59.000Z

479

Relativistic magnetohydrodynamics in dynamical spacetimes: Numerical methods and tests  

SciTech Connect (OSTI)

Many problems at the forefront of theoretical astrophysics require the treatment of magnetized fluids in dynamical, strongly curved spacetimes. Such problems include the origin of gamma-ray bursts, magnetic braking of differential rotation in nascent neutron stars arising from stellar core collapse or binary neutron star merger, the formation of jets and magnetized disks around newborn black holes, etc. To model these phenomena, all of which involve both general relativity (GR) and magnetohydrodynamics (MHD), we have developed a GRMHD code capable of evolving MHD fluids in dynamical spacetimes. Our code solves the Einstein-Maxwell-MHD system of coupled equations in axisymmetry and in full 3+1 dimensions. We evolve the metric by integrating the Baumgarte-Shapiro-Shibata-Nakamura equations, and use a conservative, shock-capturing scheme to evolve the MHD equations. Our code gives accurate results in standard MHD code-test problems, including magnetized shocks and magnetized Bondi flow. To test our code's ability to evolve the MHD equations in a dynamical spacetime, we study the perturbations of a homogeneous, magnetized fluid excited by a gravitational plane wave, and we find good agreement between the analytic and numerical solutions.

Duez, Matthew D.; Liu, Yuk Tung; Shapiro, Stuart L.; Stephens, Branson C. [Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)

2005-07-15T23:59:59.000Z

480

Numerical Simulations of Radiatively-Driven Dusty Winds  

E-Print Network [OSTI]

Radiation pressure on dust grains may be an important mechanism in driving winds in a wide variety of astrophysical systems. However, the efficiency of the coupling between the radiation field and the dusty gas is poorly understood in environments characterized by high optical depths like those in ultra-luminous infrared galaxies (ULIRGs) and massive dense star clusters. We present a series of idealized numerical experiments, performed with the radiation-hydrodynamic code \\textsc{orion}, in which we study the dynamics of such winds and quantify their properties. We find that, after wind acceleration begins, radiation Rayleigh-Taylor instability forces the gas into a configuration that reduces the rate of momentum transfer from the radiation field to the gas by a factor ~ 10 - 100 compared to an estimate based on the optical depth at the base of the atmosphere; instead, the rate of momentum transfer from a driving radiation field of luminosity L to the gas is roughly L/c multiplied by half the optical depth at...

Krumholz, Mark R

2013-01-01T23:59:59.000Z

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

Numerical simulation of laminar flow in a curved duct  

SciTech Connect (OSTI)

This paper describes numerical simulations that were performed to study laminar flow through a square duct with a 900 bend. The purpose of this work was two fold. First, an improved understanding was desired of the flow physics involved in the generation of secondary vortical flows in three-dimensions. Second, adaptive gridding techniques for structured grids in three- dimensions were investigated for the purpose of determining their utility in low Reynolds number, incompressible flows. It was also of interest to validate the commercial computer code CFD-ACE. Velocity predictions for both non-adaptive and adaptive grids are compared with experimental data. Flow visualization was used to examine the characteristics of the flow though the curved duct in order to better understand the viscous flow physics of this problem. Generally, moderate agreement with the experimental data was found but shortcomings in the experiment were demonstrated. The adaptive grids did not produce the same level of accuracy as the non-adaptive grid with a factor of four more grid points.

Lopez, A.R.; Oberkampf, W.L.

1995-01-01T23:59:59.000Z

482

Wilson loops to 20th order numerical stochastic perturbation theory  

Science Journals Connector (OSTI)

We calculate perturbative contributions of Wilson loops of various sizes up to order 20 in SU(3) pure lattice gauge theory at different lattice sizes for the Wilson gauge action using the technique of numerical stochastic perturbation theory. This allows us to investigate the perturbative series for various Wilson loops at high orders of the perturbation theory. We observe differences in the behavior of the series as a function of the loop order n. Up to n=20 we do not find evidence for the factorial growth of the expansion coefficients often assumed to characterize an asymptotic series. Based on the actually observed behavior we sum the series in a model parametrized by hypergeometric functions. For Wilson loops of moderate sizes the summed series in boosted perturbation theory reach stable plateaus for moderate perturbative order already. The coefficients in the boosted series become much more stable in the result of smoothing the coefficients of the original series effected by the hypergeometric model. We introduce generalized ratios of Wilson loops of different sizes. Together with the corresponding Wilson loops from standard Monte Carlo measurements they enable us to assess their nonperturbative parts.

R. Horsley; G. Hotzel; E.-M. Ilgenfritz; R. Millo; H. Perlt; P. E. L. Rakow; Y. Nakamura; G. Schierholz; A. Schiller

2012-09-06T23:59:59.000Z

483

Testing numerical relativity with the shifted gauge wave  

E-Print Network [OSTI]

Computational methods are essential to provide waveforms from coalescing black holes, which are expected to produce strong signals for the gravitational wave observatories being developed. Although partial simulations of the coalescence have been reported, scientifically useful waveforms have so far not been delivered. The goal of the AppleswithApples (AwA) Alliance is to design, coordinate and document standardized code tests for comparing numerical relativity codes. The first round of AwA tests have now being completed and the results are being analyzed. These initial tests are based upon periodic boundary conditions designed to isolate performance of the main evolution code. Here we describe and carry out an additional test with periodic boundary conditions which deals with an essential feature of the black hole excision problem, namely a non-vanishing shift. The test is a shifted version of the existing AwA gauge wave test. We show how a shift introduces an exponentially growing instability which violates the constraints of a standard harmonic formulation of Einstein's equations. We analyze the Cauchy problem in a harmonic gauge and discuss particular options for suppressing instabilities in the gauge wave tests. We implement these techniques in a finite difference evolution algorithm and present test results. Although our application here is limited to a model problem, the techniques should benefit the simulation of black holes using harmonic evolution codes.

Maria C. Babiuc; Bela Szilagyi; Jeffrey Winicour

2005-11-29T23:59:59.000Z

484

The Numerically Optimized Regulator and the Functional Renormalization Group  

E-Print Network [OSTI]

We aim to optimize the functional form of the compactly supported smooth (CSS) regulator within the functional renormalization group (RG), in the framework of bosonized two-dimensional Quantum Electrodynamics (QED_2) and of the three-dimensional O(N=1) scalar field theory in the local potential approximation (LPA). The principle of minimal sensitivity (PMS) is used for the optimization of the CSS regulator, recovering all the major types of regulators in appropriate limits. Within the investigated class of functional forms, a thorough investigation of the CSS regulator, optimized with two different normalizations within the PMS method, confirms that the functional form of a regulator first proposed by Litim is optimal within the LPA. However, Litim's exact form leads to a kink in the regulator function. A form of the CSS regulator, numerically close to Litim's limit while maintaining infinite differentiability, remains compatible with the gradient expansion to all orders. A smooth analytic behaviour of the regulator is ensured by a small, but finite value of the exponential fall-off parameter in the CSS regulator. Consequently, a compactly supported regulator, in a parameter regime close to Litim's optimized form, but regularized with an exponential factor, appears to have favorable properties and could be used to address the scheme dependence of the functional renormalization group, at least within the the approximations employed in the studies reported here.

I. G. Marian; U. D. Jentschura; I. Nandori

2013-11-28T23:59:59.000Z

485

Numerical models of black body dominated GRBs: II. Emission properties  

E-Print Network [OSTI]

We extend an existing theoretical model to explain the class of Black-Body Dominated (BBD) gamma-ray bursts (GRBs), long lasting events characterized by the presence of a significant thermal component trailing the GRB prompt emission, and also by an absence of a traditional afterglow. GRB 101225A, the Christmas Burst, is a prototype of such class. It has been suggested that BBD-GRBs could be observed after a merger in a binary system consisting of a neutron star and a Helium core of a main sequence star. Using detailed relativistic hydrodynamic numerical simulations we model the propagation of ultrarelativistic jets through the environments created by such mergers. In this paper we focus on explaining the emission properties of the jet evolution computing the whole radiative signature (both thermal and non-thermal) of the jet dynamical evolution. A comprehensive parameter study of the jet/environment interaction has been performed and synthetic spectra and light curves are compared with the observational data...

Cuesta-Martínez, Carlos F; Mimica, Petar; Thöne, Christina C; de Ugarte-Postigo, Antonio

2014-01-01T23:59:59.000Z

486

The Dynamics of Deterministic Chaos in Numerical Weather Prediction Models  

E-Print Network [OSTI]

Atmospheric weather systems are coherent structures consisting of discrete cloud cells forming patterns of rows/streets, mesoscale clusters and spiral bands which maintain their identity for the duration of their appreciable life times in the turbulent shear flow of the planetary Atmospheric Boundary Layer. The existence of coherent structures (seemingly systematic motion) in turbulent flows has been well established during the last 20 years of research in turbulence. Numerical weather prediction models based on the inherently non-linear Navier-Stokes equations do not give realistic forecasts because of the following inherent limitations: (1) the non-linear governing equations for atmospheric flows do not have exact analytic solutions and being sensitive to initial conditions give chaotic solutions characteristic of deterministic chaos (2) the governing equations do not incorporate the dynamical interactions and co-existence of the complete spectrum of turbulent fluctuations which form an integral part of the large coherent weather systems (3) limitations of available computer capacity necessitates severe truncation of the governing equations, thereby generating errors of approximations (4) the computer precision related roundoff errors magnify the earlier mentioned uncertainties exponentially with time and the model predictions become unrealistic. The accurate modelling of weather phenomena therefore requires alternative concepts and computational techniques. In this paper a universal theory of deterministic chaos applicable to the formation of coherent weather structures in the ABL is presented.

A. Mary Selvam

2003-10-07T23:59:59.000Z

487

Exploring inequality violations by classical hidden variables numerically  

SciTech Connect (OSTI)

There are increasingly suggestions for computer simulations of quantum statistics which try to violate Bell type inequalities via classical, common cause correlations. The Clauser–Horne–Shimony–Holt (CHSH) inequality is very robust. However, we argue that with the Einstein–Podolsky–Rosen setup, the CHSH is inferior to the Bell inequality, although and because the latter must assume anti-correlation of entangled photon singlet states. We simulate how often quantum behavior violates both inequalities, depending on the number of photons. Violating Bell 99% of the time is argued to be an ideal benchmark. We present hidden variables that violate the Bell and CHSH inequalities with 50% probability, and ones which violate Bell 85% of the time when missing 13% anti-correlation. We discuss how to present the quantum correlations to a wide audience and conclude that, when defending against claims of hidden classicality, one should demand numerical simulations and insist on anti-correlation and the full amount of Bell violation. -- Highlights: •The widely assumed superiority of the CHSH fails in the EPR problem. •We simulate Bell type inequalities behavior depending on the number of photons. •The core of Bell’s theorem in the EPR setup is introduced in a simple way understandable to a wide audience. •We present hidden variables that violate both inequalities with 50% probability. •Algorithms have been supplied in form of Mathematica programs.

Vongehr, Sascha, E-mail: vongehr@usc.edu

2013-12-15T23:59:59.000Z

488

Numerical modeling of dish-Stirling reflux solar receivers  

SciTech Connect (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

489

Representing Cloud Processing of Aerosol in Numerical Models  

SciTech Connect (OSTI)

The satellite imagery in Figure 1 provides dramatic examples of how aerosol influences the cloud field. Aerosol from ship exhaust can serve as nucleation centers in otherwise cloud-free regions, forming ship tracks (top image), or can enhance the reflectance/albedo in already cloudy regions. This image is a demonstration of the first indirect effect, in which changes in aerosol modulate cloud droplet radius and concentration, which influences albedo. It is thought that, through the effects it has on precipitation (drizzle), aerosol can also affect the structure and persistence of planetary boundary layer (PBL) clouds. Regions of cellular convection, or open pockets of cloudiness (bottom image) are thought to be remnants of strongly drizzling PBL clouds. Pockets of Open Cloudiness (POCs) (Stevens et al. 2005) or Albrecht's ''rifts'' are low cloud fraction regions characterized by anomalously low aerosol concentrations, implying they result from precipitation. These features may in fact be a demonstration of the second indirect effect. To accurately represent these clouds in numerical models, we have to treat the coupled cloud-aerosol system. We present the following series of mesoscale and large eddy simulation (LES) experiments to evaluate the important aspects of treating the coupled cloud-aerosol problem. 1. Drizzling and nondrizzling simulations demonstrate the effect of drizzle on a mesoscale forecast off the California coast. 2. LES experiments with explicit (bin) microphysics gauge the relative importance of the shape of the aerosol spectrum on the 3D dynamics and cloud structure. 3. Idealized mesoscale model simulations evaluate the relative roles of various processes, sources, and sinks.

Mechem, D.B.; Kogan, Y.L.

2005-03-18T23:59:59.000Z

490

Numerical simulation of buoyant turbulent flow. Final report  

SciTech Connect (OSTI)

Two models have been developed for predicting low Reynolds number turbulent flows in the free and mixed convection regimes. One, the KEM model, is based on the notion of eddy diffusivities for momentum and heat. The other, the ASM model, is based on algebraic relations derived for the anisotropic turbulent fluxes by suitable truncation of the parent transport equations. Both formulations apply to variable property flows with high overheat ratios. A comparison between measurements and predictions for the case of the vertical plate shows that both models yield fairly accurate results for the mean flow and heat transfer. As a result, only the simpler of the two models, the KEM, was used to predict the cavity flows. Predictions for the case of the vertical flat plate show excellent agreement with measurements of mean velocity, temperature and Nusselt number. Nearwall results predicted by both models reveal the existence of a 1/3 power-law dependence. Regions of negative buoyant and shear production of turbulence kinetic energy are clearly revealed by the calculations. Calculations of the cavity configuration were performed for the free and mixed flow conditions. Fairly good agreement is obtained between measurements and predictions of the velocity and temperature fields. Many of the complex characteristics of heated cavity flows, revealed experimentally, are resolved numerically. Although differing in absolute value, calculations of the cavity Nusselt number show trends which are in accord with the measurements. Thus, in the free convection regime it is shown that when the cavity is tilted forwards stable stratification of fluid dampens the turbulence fluctuations which works to reduce heat transfer.

Humphrey, J.A.C.; Sherman, F.S.; To, W.M.

1985-08-01T23:59:59.000Z

491

Numerical studies on global buckling of subsea pipelines  

Science Journals Connector (OSTI)

Abstract Subsea pipelines buckle globally because of their movement relative to surrounding soil. Global buckling is often triggered by high operational temperature of the oil in pipelines, initial imperfections in the pipeline, and/or a combination of both. Pipeline global buckling is a failure mode that must be considered in the design and in-service assessment of submarine pipelines because it can jeopardize the structural integrity of the pipelines. Global buckling is increasingly difficult to control as temperature and pressure increase. Therefore, location prediction and buckling control are critical to pipeline design. Finite element analysis (FEA) is often used to analyze the behavior of pipelines subject to extreme pressures and temperatures. Four numerical simulation methods based on the finite element method (FEM) program ABAQUS, i.e., the 2D implicit, 2D explicit, 3D implicit, and 3D explicit methods, are used to simulate pipeline global buckling under different temperatures. The analysis results of the four typical methods were then compared with classical analytical solutions. The comparison indicates that the results obtained using the 2D implicit and 2D explicit methods are similar and the results obtained using the 2D implicit method are closer to those obtained using traditional analytical solutions. The analysis shows that the results of the 3D implicit and 3D explicit methods are similar, but the results obtained using the 3D methods are significantly different from those obtained using the analytical solution. A novel method to introduce initial pipeline imperfections into the FEA model in global buckling analysis is also presented in this paper.

Run Liu; Hao Xiong; Xinli Wu; Shuwang Yan

2014-01-01T23:59:59.000Z

492

Sustainable heat extraction from abandoned mine tunnels: A numerical model  

Science Journals Connector (OSTI)

Abandoned mines are often associated with enduring liabilities which involve significant costs for decades after the decommissioning of the mine. Using a decommissioned mine as a geothermal resource can offset the environmental costs by supplying green heat to the communities living in and around the mine area. In this paper a numerical assessment of geothermal heat extraction from underground mine workings using an open loop geothermal system is carried out. In this study our focus is on fully flooded mines where the heat flow from the rock mass to the mine cavities is dominantly controlled by conduction in the rock mass. The sustainable heat flux into the mine workings is assessed using a transient two-dimensional axisymmetric heat transfer model. Finite volume method is applied to solve the model and simulate the transient temperature fields in the rock mass and within the water (flowing through cavities). The model is capable of controlling the rate of heat extraction through continuous adjustment of the rate of water flow through the mine. Sustainable rate of heat extraction is calculated for seasonally varied heat loads and for different project life cycles. It is shown that with proper resource management each kilometre of a typical deep underground mine tunnel can produce about 150?kW of usable heat in a sustainable manner. The model is validated by comparing its results with other published models and realistic data available from Springhill mine Nova Scotia Canada. It is found that the sustainable heat extraction is controlled dominantly by virgin rock temperature thermal conductivity of the rock mass and seasonal heat load variations.

S. A. Ghoreishi Madiseh; Mory M. Ghomshei; F. P. Hassani; F. Abbasy

2012-01-01T23:59:59.000Z

493

Numerical simulation of wind resonance of a circular profile by means of the vortex element method  

Science Journals Connector (OSTI)

The problem regarding the numerical simulation of a circular profile motion in a ... element method is used. The phenomenon of wind resonance has been examined. The investigation has...

I. K. Marchevskii; O. I. Ivanov

2009-10-01T23:59:59.000Z

494

MATLAB muliplatform research license: Numeric computation, advanced graphics and visualization, and a high-level programming  

E-Print Network [OSTI]

MATLAB muliplatform research license: Numeric computation, advanced graphics and visualization license allows research and includes the following: Feature # of users MATLAB 7 Simulink 6 Control System

Dawson, Jeff W.

495

Numerical Methods for Multiphysics, Multiphase, and Multicomponent Models for Fuel Cells.  

E-Print Network [OSTI]

??In this dissertation, we design and analyze efficient numerical methods for obtaining accurate solutions to model problems arising in fuel cells. A basic fuel cell… (more)

Xue, Guangri

2008-01-01T23:59:59.000Z

496

Numerical Study of Freestream Waves Receptivity and Nonlinear Breakdown in Hypersonic Boundary Layer  

E-Print Network [OSTI]

Numerical Methods for Hypersonic Boundary Layer Stability.of Instability in a Hypersonic Boundary Layer. TheoreticalA. P. , Receptivity of Hypersonic Boundary Layer to Wall

Lei, Jia

2013-01-01T23:59:59.000Z

497

A numerical procedure to model and monitor CO2 sequestration in ...  

E-Print Network [OSTI]

Sep 7, 2012 ... analyze storage integrity, providing early warning should any leakage occurs. A numerical procedure to model and monitor CO2 sequestration ...

santos

498

Numerical and experimental study of hydrodynamics in a compartmented fluidized bed oil palm shell biomass gasifier.  

E-Print Network [OSTI]

??Numerical and experimental studies of hydrodynamic parameters of fluidized beds formed by either a single component system or a binary mixture in a pilot plant… (more)

Wee, Siaw Khur

2011-01-01T23:59:59.000Z

499

Numerical tools for musical instruments acoustics: analysing nonlinear physical models using continuation  

E-Print Network [OSTI]

self-sustained oscillations. Several physical models (clarinet and saxophone) are formulated the dynamical properties of self-sustained musical instruments using tra- ditional numerical techniques

Boyer, Edmond

500

Numerical Analysis and Design of Carbon-Foam-based Garment and Helmet for Firefighters.  

E-Print Network [OSTI]

??Carbon foam is known for its excellent insulation properties and is also regarded as an effective shock absorbing material. In the present work, a numerical… (more)

Mishra, Sarthak

2014-01-01T23:59:59.000Z