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1

Accommodations  

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

Accommodations Accommodations Accommodations Los Alamos National Laboratory is situated on a mesatop on the eastern side of the Jemez Mountains, an impressive series of ancient volcanoes with extensive views of the Sangre de Cristo Mountains in the east, where sunsets turn the western slopes a vibrant red. We hope you enjoy your stay in the Land of Enchantment. Update: The La Fonda is now full. Reservations can be made at the overflow hotel, La Posada, which is a short walk from the conference hotel: Contact reservations at 1-855-278-5276 OR Book via the web at be.genares.net/10054 Use group code is GSFAF to obtain the group rate of only $83 per night Rooms must be booked by April 30. La Fonda The Sequencing, Finishing and Analysis in the Future meeting is sponsored and hosted by DOE's Los Alamos National Laboratory. No registration fee is

2

Variability of the Southern Hemisphere Winter Split Flow—A Case of Two-Way Reinforcement between Mean Flow and Eddy Anomalies  

Science Conference Proceedings (OSTI)

A new split-jet index is defined in this study, and composites based on this index show that the split-flow regime is characterized by a cold–warm–cold tripolar temperature anomaly in the South Pacific that extends equatorward from the Southern ...

Xiaosong Yang; Edmund K. M. Chang

2006-02-01T23:59:59.000Z

3

TWO-WAY FREEZE VALVE  

DOE Patents (OSTI)

A valve for closing off the flow of radioactive and corrosive gases and liquids or mixtures thereof and forming a leak tight barrier is described. This valve has no mechanical moving parts which would require design to close tolerances and retention of the usual seal tighthess. Instead, there is provided a cavity in which a fusible metal is contained. Heating and cooling are provided to exercise control over the state of the metal. Baffle chambers are utilized to separate the molten fusible metal from the gas or liquid which is being passed through and return the molten metal to its cavity.

Lantz, K.D.; Clark, P.M.

1960-01-01T23:59:59.000Z

4

Alternating two-way AC-tree automata  

Science Conference Proceedings (OSTI)

We explore the notion of alternating two-way tree automata modulo the theory of finitely many associative-commutative (AC) symbols. This was prompted by questions arising in cryptographic protocol verification, in particular in modeling group key agreement ... Keywords: Alternating tree automata, Associative-commutative, Branching vector addition systems with states, Cryptographic protocols, Resolution, Tree automata, Two-way tree automata

Kumar Neeraj Verma; Jean Goubault-Larrecq

2007-06-01T23:59:59.000Z

5

Definition: Two-Way Communications (High Bandwidth) | Open Energy  

Open Energy Info (EERE)

Two-Way Communications (High Bandwidth) Two-Way Communications (High Bandwidth) Jump to: navigation, search Dictionary.png Two-Way Communications (High Bandwidth) A two-way communications infrastructure that can network one or more parts of the smart grid via secure, high speed, high bandwidth connections. This infrastructure system serves as the backbone of the customer systems, AMI, distribution, and transmission smart grid systems.[1] View on Wikipedia Wikipedia Definition A smart meter is usually an electrical meter that records consumption of electric energy in intervals of an hour or less and communicates that information at least daily back to the utility for monitoring and billing purposes. Smart meters enable two-way communication between the meter and the central system. Unlike home energy monitors,

6

Energy Cooperation in Energy Harvesting Two-Way Communications  

E-Print Network (OSTI)

Energy Cooperation in Energy Harvesting Two-Way Communications Berk Gurakan1 , Omur Ozel1 , Jing energy from nature and energy can be transferred in one-way from one of the users to the other. Energy and users have unlimited batteries to store energy for future use. In addition, there is a separate wireless

Ulukus, Sennur

7

Method of preparing a two-way shape memory alloy  

DOE Patents (OSTI)

A two-way shape memory alloy, a method of training a shape memory alloy, and a heat engine employing the two-way shape memory alloy to do external work during both heating and cooling phases are disclosed. The alloy is heated under a first training stress to a temperature which is above the upper operating temperature of the alloy, then cooled to a cold temperature below the zero-force transition temperature of the alloy, then deformed while applying a second training stress which is greater in magnitude than the stress at which the alloy is to be operated, then heated back to the hot temperature, changing from the second training stress back to the first training stress. 8 figs.

Johnson, A.D.

1984-03-06T23:59:59.000Z

8

Method of preparing a two-way shape memory alloy  

DOE Patents (OSTI)

A two-way shape memory alloy, a method of training a shape memory alloy, and a heat engine employing the two-way shape memory alloy to do external work during both heating and cooling phases. The alloy is heated under a first training stress to a temperature which is above the upper operating temperature of the alloy, then cooled to a cold temperature below the zero-force transition temperature of the alloy, then deformed while applying a second training stress which is greater in magnitude than the stress at which the alloy is to be operated, then heated back to the hot temperature, changing from the second training stress back to the first training stress.

Johnson, Alfred D. (5383 Bancroft Ave., Oakland, CA 94601)

1984-01-01T23:59:59.000Z

9

A two-way algorithm for the entanglement problem  

E-Print Network (OSTI)

We propose an algorithm which proves a given bipartite quantum state to be separable in a finite number of steps. Our approach is based on the search for a decomposition via a countable subset of product states, which is dense within all product states. Performing our algorithm simultaneously with the algorithm by Doherty, Parrilo and Spedalieri (which proves a quantum state to be entangled in a finite number of steps) leads to a two-way algorithm that terminates for any input state. Only for a set of arbitrary small measure near the border between separable and entangled states the result is inconclusive.

Florian Hulpke; Dagmar Bruss

2004-07-22T23:59:59.000Z

10

Two-way data communication between utility and customer  

SciTech Connect

Distribution automation is the remote control of the distribution network that carries power from local substations to customer meters. The system, which seems to be feasible for the near future, provides two-way communication between utility and customer; not only must the utility operator be able to issue commands to automated equipment but the customer's meter must be able to answer the controller, reporting status and relaying data. Although there are other available, three types of communication systems are being investigated at present as the most feasible: power line carrier, telephone, and radio. Each system has its own special capabilities and limitations. Hybrid systems (two or more different communication systems) are also a possibility. Besides fault location and service restoration, distribution automation could facilitate time-of-day metering, load control, voltage control, and even meter reading. Most aspects of this two-way communication are accepted as beneficial by the customer; load control, however, which could selectively interfere with major appliances like water heaters, air conditioners, etc., during peak demand by selectively switching them off to level peak loads, might not be so readily acceptable. (SAC)

Lihach, N.; Blair, W.

1980-05-01T23:59:59.000Z

11

Symmetry breaking in optimal timing of traffic signals on an idealized two-way street  

E-Print Network (OSTI)

Simple physical models based on fluid mechanics have long been used to understand the flow of vehicular traffic on freeways; analytically tractable models of flow on an urban grid, however, have not been as extensively explored. In an ideal world, traffic signals would be timed such that consecutive lights turned green just as vehicles arrived, eliminating the need to stop at each block. Unfortunately, this "green wave" scenario is generally unworkable due to frustration imposed by competing demands of traffic moving in different directions. Until now this has typically been resolved by numerical simulation and optimization. Here, we develop a theory for the flow in an idealized system consisting of a long two-way road with periodic intersections. We show that optimal signal timing can be understood analytically and that there are counter-intuitive asymmetric solutions to this signal coordination problem. We further explore how these theoretical solutions degrade as traffic conditions vary and automotive dens...

Panaggio, Mark J; Hu, Peiguang; Abrams, Daniel M

2013-01-01T23:59:59.000Z

12

Power allocation strategies for distributed space-time codes in two-way relay networks  

Science Conference Proceedings (OSTI)

We study a two-way relay network (TWRN), where distributed space-time codes are constructed across multiple relay terminals in an amplify-and-forward mode. Each relay transmits a scaled linear combination of its received symbols and their conjugates, ... Keywords: distributed space-time codes, power allocation, two-way relay channel

Wenjin Wang; Shi Jin; Xiqi Gao; Kai-Kit Wong; Matthew R. McKay

2010-10-01T23:59:59.000Z

13

Common randomness and secret key capacities of two-way channels  

Science Conference Proceedings (OSTI)

Common Randomness Generation (CRG) and Secret Key Establishment (SKE) are fundamental primitives in information theory and cryptography. We study these two problems over the two-way communication channel model, introduced by Shannon. In this model, the ... Keywords: common randomness capacity, secret key capacity, two-way channel, wiretap channel

Hadi Ahmadi; Reihaneh Safavi-Naini

2011-05-01T23:59:59.000Z

14

Visiting Fermilab - Local Accommodations  

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

Local Accommodations Local Accommodations Aurora Fox Valley Inn 2450 North Farnsworth Avenue Aurora, Illinois (Approx. 4 miles from Fermilab Wilson Hall) Telephone: 630-851-2000 Baymont Inn & Suites 1585 Naperville-Wheaton Road Naperville, Illinois (Approx. 8 miles from Fermilab Wilson Hall) Telephone: 630-357-0022 Comfort Inn & Suites 1555 E. Fabyan Parkway Geneva, IL (Approx. 4 miles from Fermilab Wilson Hall) 630-208-8811 Courtyard by Marriott 1155 E. Diehl Road Naperville, Illinois (Approx. 8 miles from Fermilab Wilson Hall) Telephone: 630-505-0550 Extended Stay America (All rooms have kitchenettes) 1575 Bond Street (Route 59 & Diehl Road) Naperville, Illinois (Approx. 7 miles from Fermilab Wilson Hall) Telephone: 630-983-0000 Lisle Hilton 3303 Corporate West Drive Lisle, Illinois

15

DOE Reasonable Accommodation Procedures  

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

Pursuant to Executive Order 13164, the Department of Energy (hereinafter referred to as the “department”), is charged with establishing written procedures for the facilitation of reasonable accommodation for: (1) individuals with disabilities in the application process for employment with the Department; (2) Department employees with disabilities to perform the essential functions of a position; and (3) Department employees with disabilities to enjoy benefits and privileges of employment equal to those enjoyed by employees without disabilities.

16

Initial Results From The Navy Two-Way Interactive Nested Tropical Cyclone Model  

Science Conference Proceedings (OSTI)

A primitive equation, two-way interactive nested tropical cyclone model has been developed by the Naval Environmental Prediction Research Facility for operational use during the 1980 typhoon season. The fine mesh grid of the model operates ...

Edward J. Harrison Jr.

1981-01-01T23:59:59.000Z

17

Scalar Reconciliation for Gaussian Modulation of Two-Way Continuous-Variable Quantum Key Distribution  

E-Print Network (OSTI)

The two-way continuous-variable quantum key distribution (CVQKD) systems allow higher key rates and improved transmission distances over standard telecommunication networks in comparison to the one-way CVQKD protocols. To exploit the real potential of two-way CVQKD systems a robust reconciliation technique is needed. It is currently unavailable, which makes it impossible to reach the real performance of a two-way CVQKD system. The reconciliation process of correlated Gaussian variables is a complex problem that requires either tomography in the physical layer that is intractable in a practical scenario, or high-cost calculations in the multidimensional spherical space with strict dimensional limitations. To avoid these issues, we propose an efficient logical layer-based reconciliation method for two-way CVQKD to extract binary information from correlated Gaussian variables. We demonstrate that by operating on the raw-data level, the noise of the quantum channel can be corrected in the scalar space and the reconciliation can be extended to arbitrary high dimensions. We prove that the error probability of scalar reconciliation is zero in any practical CVQKD scenario, and provides unconditional security. The results allow to significantly improve the currently available key rates and transmission distances of two-way CVQKD. The proposed scalar reconciliation can also be applied in one-way systems as well, to replace the existing reconciliation schemes.

Laszlo Gyongyosi

2013-08-06T23:59:59.000Z

18

Reasonable Accommodations | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

NNSA Blog Reasonable Accommodations Home > About Us > Our Operations > Management and Budget > Office of Civil Rights > Reasonable Accommodations Reasonable Accommodations For...

19

Conversion of one- to two-way streets in Birmingham downtown: a feasibility study  

Science Conference Proceedings (OSTI)

Many urban areas are looking for ways to attract new businesses and residents in city centers and transform declining downtown areas into vibrant elements of the urban landscape. As a principal revival option, studies are conducted nationwide to understand ... Keywords: one-way operations, signal optimization, traffic impacts analysis, two-way operations

Virginia P. Sisiopiku; Jugnu Chemmannur; James Brown

2010-04-01T23:59:59.000Z

20

Automatic two way synchronization between server and multiple clients for HVAC system  

Science Conference Proceedings (OSTI)

The authors study different two way synchronization methods between a server and distributed clients. Client-server architectures are used to control multiple instances from center. Hard-coded embedded controllers are replaced by embedded controllers ... Keywords: HVAC, data synchronization, embedded systems, multi-agent systems, online file storage, thick client

Anton Tyukov; Adriaan Brebels; Maxim Shcherbakov

2011-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "accommodates two-way flows" 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

Effect of Two-Way Air–Sea Coupling in High and Low Wind Speed Regimes  

Science Conference Proceedings (OSTI)

A recent advance in the Coupled Ocean–Atmosphere Mesoscale Prediction System (COAMPS) is described and used to study two-way air–sea coupling and its impact on two different weather scenarios. The first case examines the impact of a hurricane-...

Sue Chen; Tim J. Campbell; Hao Jin; Saša Gaberšek; Richard M. Hodur; Paul Martin

2010-09-01T23:59:59.000Z

22

An Idealized Comparison of One-Way and Two-Way Grid Nesting  

Science Conference Proceedings (OSTI)

Most mesoscale models can be run with either one-way (parasitic) or two-way (interactive) grid nesting. This paper presents results from a linear 1D shallow-water model to determine whether the choice of nesting method can have a significant ...

Lucas M. Harris; Dale R. Durran

2010-06-01T23:59:59.000Z

23

Accommodation Zone | 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 Page Edit History Facebook icon Twitter icon » Accommodation Zone Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Accommodation Zone Dictionary.png Accommodation Zone: Accommodation zones occur at fault intersections consisting of belts of interlocking, oppositely dipping normal faults. Multiple subsurface fault intersections in these zones are a favorable host for geothermal activity. Other definitions:Wikipedia Reegle Controlling Structures List of controlling structures typically associated with geothermal systems: Major Normal Fault Termination of a Major Normal Fault Stepover or Relay Ramp in Normal Fault Zones

24

Chromatin Regulation and Low Dose Irradiation: A Two-Way Street?  

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

Chromatin Regulation and Low Dose Irradiation: A Two-Way Street? Chromatin Regulation and Low Dose Irradiation: A Two-Way Street? Irene Chiolo Lawrence Berkeley National Lab Abstract Goal: We are trying to understand the impact of exposure to low-dose ionizing radiation on epigenetic mechanisms, chromatin organization and functional responses, and how these processes affect the response to low-dose radiation. Background/Significance: Genomic instability (GI) is one of the hallmarks of cancer that contributes to genetic diversity and has been associated with exposure to ionizing radiation (IR) (1,2). Radiobiology dogma has focused on DNA as the likely target for GI effects of radiation, but until fairly recently, without incorporating roles for chromatin. Eukaryotic genomes contain two major chromatin domains: heterochromatin and

25

Chromatin Regulation and Low Dose Irradiation: A Two-Way Street ?  

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

Chromatin Regulation and Low Dose Irradiation: A Two-Way Street ? Chromatin Regulation and Low Dose Irradiation: A Two-Way Street ? Irene Chiolo, Sylvain Costes and Gary H. Karpen. Lawrence Berkeley National Lab and UC Berkeley, Berkeley, CA Goal: We are trying to understand the impact of exposure to low-dose ionizing radiation on epigenetic mechanisms, chromatin organization and functional responses, and how these processes affect the response to low-dose radiation. Background/Significance: Genomic instability (GI) is one of the hallmarks of cancer that contributes to genetic diversity and has been associated with exposure to ionizing radiation (IR) (1,2). Radiobiology dogma has focused on DNA as the likely target for GI effects of radiation, but until fairly recently, without incorporating roles for chromatin.

26

Battery electrode growth accommodation  

DOE Patents (OSTI)

An electrode for a lead acid flow through battery, the grids including a plastic frame, a plate suspended from the top of the frame to hang freely in the plastic frame and a paste applied to the plate, the paste being free to allow for expansion in the planar direction of the grid.

Bowen, Gerald K. (Cedarburg, WI); Andrew, Michael G. (Wauwatosa, WI); Eskra, Michael D. (Fredonia, WI)

1992-01-01T23:59:59.000Z

27

Passive Faraday-mirror attack in a practical two-way quantum-key-distribution system  

Science Conference Proceedings (OSTI)

The Faraday mirror (FM) plays a very important role in maintaining the stability of two-way plug-and-play quantum key distribution (QKD) systems. However, the practical FM is imperfect, which will not only introduce an additional quantum bit error rate (QBER) but also leave a loophole for Eve to spy the secret key. In this paper we propose a passive Faraday mirror attack in two-way QKD system based on the imperfection of FM. Our analysis shows that if the FM is imperfect, the dimension of Hilbert space spanned by the four states sent by Alice is three instead of two. Thus Eve can distinguish these states with a set of Positive Operator Valued Measure (POVM) operators belonging to three-dimension space, which will reduce the QBER induced by her attack. Furthermore, a relationship between the degree of the imperfection of FM and the transmittance of the practical QKD system is obtained. The results show that the probability that Eve loads her attack successfully depends on the degree of the imperfection of FM rapidly, but the QBER induced by Eve's attack changes slightly with the degree of the FM imperfection.

Sun Shihai; Jiang Musheng; Liang Linmei [Department of Physics, National University of Defense Technology, Changsha 410073 (China)

2011-06-15T23:59:59.000Z

28

Two-way coupling of Presto v2.8 and CTH v8.1.  

SciTech Connect

A loose two-way coupling of SNL's Presto v2.8 and CTH v8.1 analysis code has been developed to support the analysis of explosive loading of structures. Presto is a Lagrangian, three-dimensional explicit, transient dynamics code in the SIERRA mechanics suite for the analysis of structures subjected to impact-like loads. CTH is a hydro code for modeling complex multi-dimensional, multi-material problems that are characterized by large deformations and/or strong shocks. A fundamental assumption in this loose coupling is that the compliance of the structure modeled with Presto is significantly smaller than the compliance of the surrounding medium (e.g. air) modeled with CTH. A current limitation of the coupled code is that the interaction between CTH and thin structures modeled in Presto (e.g. shells) is not supported. Research is in progress to relax this thin-structure limitation.

Bruner, Christopher William Stuteville; Bishop, Joseph E.; Crawford, David A.; Edwards, Harold Carter

2008-07-01T23:59:59.000Z

29

An evaluation of supplemental signing at two-way stop-controlled intersections  

E-Print Network (OSTI)

Drivers entering a two-way stop-controlled (TWSC) intersection with similar approach geometries and volumes may make the incorrect assumption that all approach legs are required to stop at the intersection. To respond to this safety concern, traffic engineers developed supplemental signs to remind drivers on the stop-controlled roadway that vehicles on the major roadway are not required to stop. The signs are generally placed directly underneath the STOP sign with a typical legend "CROSS TRAFFIC DOES NOT STOP." The objective of this thesis was to investigate the effectiveness of these signs in reducing conflicts and accidents at TWSC intersections. Traffic conflict and accident data were obtained for six TWSC intersections in Texas; three locations where supplemental signs had been installed and three locations with only a standard STOP sign. Only cross traffic conflicts/accidents were analyzed. A cross traffic accident/conflict was defined as an incident involving a vehicle on the stopped approach and a vehicle on the through approach. Conflict data were collected with a video camera mounted on 9.1 meter telescoping mast, Accident and conflicts were not significantly different where supplemental signs have been installed. Probability distributions were developed to establish 90 percentile levels for both accidents and conflicts at TWSC intersections with 5,000 to I 0,000 total entering vehicles per day. These values were found to be 18 conflicts per day and a mean accident frequency of five per year. The relationship between conflict and accident frequency was determined to be a positive linear relationship. The recommendations provide guidelines for future evaluations of safety at TWSC intersections.

Schuckel, Clint Edwin

1996-01-01T23:59:59.000Z

30

Implementation of a Two-Way Interactive Atmospheric and Ecological Model and Its Application to the Central United States  

Science Conference Proceedings (OSTI)

A coupled Regional Atmospheric Modeling System (RAMS) and ecosystem (CENTURY) modeling system has been developed to study regional-scale two-way interactions between the atmosphere and biosphere. Both atmospheric forcings and ecological ...

Lixin Lu; Roger A. Pielke Sr.; Glen E. Liston; William J. Parton; Dennis Ojima; Melannie Hartman

2001-03-01T23:59:59.000Z

31

Examining Interior Grid Nudging Techniques Using Two-Way Nesting in the WRF Model for Regional Climate Modeling  

Science Conference Proceedings (OSTI)

This study evaluates interior nudging techniques using the Weather Research and Forecasting (WRF) model for regional climate modeling over the conterminous United States (CONUS) using a two-way nested configuration. NCEP–Department of Energy ...

Jared H. Bowden; Tanya L. Otte; Christopher G. Nolte; Martin J. Otte

2012-04-01T23:59:59.000Z

32

Two-Way Particle-Tracking Model for Specifying Sources of Drifting Objects: Application to the East China Sea Shelf  

Science Conference Proceedings (OSTI)

The two-way Lagrangian particle-tracking model (PTM) is proposed for specifying sources of objects drifting with random-walk processes on the sea surface. First, to determine object source candidates, modeled particles are released from the point ...

Atsuhiko Isobe; Shin’ichiro Kako; Pil-Hun Chang; Takeshi Matsuno

2009-08-01T23:59:59.000Z

33

Reasonable Accommodations | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Reasonable Accommodations | National Nuclear Security Administration Reasonable Accommodations | 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 Reasonable Accommodations Home > About Us > Our Operations > Management and Budget > Office of Civil Rights > Reasonable Accommodations Reasonable Accommodations For information and guidance on Reasonable Accommodations, contact the

34

Headquarters Accommodation Program | Department of Energy  

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

Programs » Headquarters Programs » Headquarters Accommodation Program Headquarters Accommodation Program The Headquarters Accommodation Program Manager works with DOE managers, employees and visitors to provide information and assistance related to persons with disabilities. Areas of assistance include: Auxiliary services, such as sign language interpreting services, readers for the blind, or personal assistants for the physically challenged Guidance and information regarding accommodations, as well as laws and regulations related to persons with disabilities Department-wide coordination of the Computer/Electronic Accommodations Program (CAP) for assistive/adaptive technology removal of physical, environmental or attitudinal barriers for individuals with disabilities All services are confidential

35

Examining Two-Way Grid Nesting for Large Eddy Simulation of the PBL Using the WRF Model  

Science Conference Proceedings (OSTI)

The performance of two-way nesting for large eddy simulation (LES) of PBL turbulence is investigated using the Weather Research and Forecasting model framework. A pair of LES-within-LES experiments are performed where a finer-grid LES covering a ...

C-H. Moeng; Jimy Dudhia; Joe Klemp; Peter Sullivan

2007-06-01T23:59:59.000Z

36

Hotels & Accommodations - Clean Cities Transportation Workshop...  

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

Hotels & Accommodations Workshops Clean Cities Transportation Workshop for Almaty KZ Workshop Home First Announcement (EN), PDF 288KB First Announcement (RU), PDF 404KB Trainers &...

37

Microsoft Word - Accommodates All Generation Storage Options...  

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

13 v 3.0 Accommodates All Generation and Storage Options 3 EXECUTIVE SUMMARY The smart grid is defined by its seven principal characteristics. One of those characteristics...

38

Accommodation Program Contacts | Department of Energy  

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

Accommodation Program Contacts Accommodation Program Contacts Accommodation Program Contacts Section 508 Coordinators: For information with regard to DOE Section 508 Policy and Guidance, contact DOE Section 508 Coordinators: Jeffrey Williams DOE Section 508 Coordinator (Primary) Chief Information Office, Customer Relationship Management Office (202) 586-1305 jeffrey.williams@hq.doe.gov Deborah Urban DOE Section 508 Coordinator (Alternate) Chief Information Office, Customer Relationship Management Office (702) 295-1333 deborah.urban@hq.doe.gov Assistive Technologies Coordinator (ATC) For information and recommendations with regard to assistive devices and or applications, employees should contact the Office of Chief Information Officer (OCIO) Assistive Technologies Coordinator (ATC): Jeffrey Williams

39

Reasonable Accommodation POCs | Department of Energy  

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

Reasonable Accommodation POCs Reasonable Accommodation POCs Reasonable Accommodation POCs Name Organization Phone # E-mail Donna Friend Headquarters Policy 202-586-5880 donna.friend@hq.doe.gov Suzanne Piper Headquarters Operations 202-586-8515 suzanne.piper@hq.doe.gov Dave Penk Bonneville Power Administration 503-230-4184 dppenk@bpa.gov Sharon Hale-Mockley Bonneville Power Administration 503-230-5274 skhale-mockley@bpa.gov Donna Wachter EE/Golden Field Office 303-275-4917 donna.wachter@go.doe.gov Kimberly Dellinger EM/CBC 513-246-0520 kimberly.dellinger@emcbc.doe.gov Shantelle Taylor EM 202-586-8250 shantelle.taylor@hq.doe.gov Santos Ortega EM/Richland Operations Office 509-376-2083 santos.ortega@rl.doe.gov Deanna Yates EM/Savannah River Operations 803-952-6925 deanna.yates@srs.gov

40

Definition: Accommodation Zone | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: Accommodation Zone Jump to: navigation, search Dictionary.png Accommodation Zone Accommodation zones occur at fault intersections consisting of belts of interlocking, oppositely dipping normal faults. Multiple subsurface fault intersections in these zones are a favorable host for geothermal activity.[2] View on Wikipedia Wikipedia Definition References ↑ James E. Faulds,Nicholas H. Hinz,Mark F. Coolbaugh,Patricia H. Cashman,Christopher Kratt,Gregory Dering,Joel Edwards,Brett Mayhew,Holly McLachlan. 2011. Assessment of Favorable Structural Settings of Geothermal Systems in the Great Basin, Western USA. In: Transactions. GRC Anual Meeting; 2011/10/23; San Diego, CA. Davis, CA: Geothermal Resources

Note: This page contains sample records for the topic "accommodates two-way flows" 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

Accommodations for Physical Disabilities | Department of Energy  

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

Physical Disabilities Physical Disabilities Accommodations for Physical Disabilities There are a variety of accommodation solutions available for individuals with various degrees of mobility limitation. In addition to the actual computer or telecommunications access needs, the entire office environment should be reviewed for barriers to access. Some examples would include narrow aisles that do not allow wheelchair passage, workstation surfaces that are too high or low which may result in fatigue or render the work area inaccessible, or doors that are too heavy for the individual to open. Although many individuals with mobility impairments are able to adequately determine which potential accommodation solutions would be most useful for them, others may need additional assistance. For individuals with severe

42

Berkeley Lab: Nearby Short-Term Accommodations  

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

Accommodations Accommodations Visitor Information Maps and Directions to the Lab Offsite Shuttle Bus Service Bay Area Mass Transit Information Site Access Parking Permits and Gate Passes UC Berkeley Campus Map Nearby Short-Term Accommodations Guest House Berkeley Lab Guest House - The Berkeley Lab guest house is conveniently located on the Lawrence Berkeley National Laboratory campus and features 57 tastefully appointed guest rooms, many with spectacular views of the San Francisco bay, skyline, and City of Berkeley. The guest house is only a few minutes away from the University of California Berkeley Campus and the dynamic Berkeley community itself. It is available to visiting researchers and those conducting business with the University. The Faculty Club * U.C. Campus

43

Accommodations for Vision Disabilities | Department of Energy  

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

Vision Disabilities Vision Disabilities Accommodations for Vision Disabilities "Low Vision" Accommodations Glare Protection Screen - Minimizes visual fatigue associated with glare on the monitor. Large Monitor with High Resolution (19" - 25") - Increases character size in proportion to monitor dimensions and provides a crisp, sharp image. Magnified Display of Computer Screen - Either software or hardware solutions exist to present the images on the computer in a larger format. Character size can be increased up to 216 times. Magnified Display of Hardcopy Material - Hardware exists that will magnify any item placed under a CCTV camera. Documents, drawings, phone messages, etc. can be seen enlarged on a CCTV monitor. Large Print Production - Several software packages are available

44

The Influence of Hydrologic Modeling on the Predicted Local Weather: Two-Way Coupling of a Mesoscale Weather Prediction Model and a Land Surface Hydrologic Model  

Science Conference Proceedings (OSTI)

A two-way coupling of the operational mesoscale weather prediction model known as Lokal Modell (LM; German Weather Service) with the land surface hydrologic “TOPMODEL”-Based Land Surface–Atmosphere Transfer Scheme (TOPLATS; Princeton University) ...

G. Seuffert; P. Gross; C. Simmer; E. F. Wood

2002-10-01T23:59:59.000Z

45

Accommodations for Hearing Disabilities | Department of Energy  

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

Hearing Disabilities Hearing Disabilities Accommodations for Hearing Disabilities Although the general term "hearing impaired" is being used to include both deaf and hard of hearing individuals, the needs of these two groups may vary greatly. In general, people who are deaf depend more upon visual skills for communication and information in their environment while hard of hearing people enhance their usable hearing while relying on auditory input more than visual input. This general difference drives many of the concerns and needs mentioned in this section. It is key that the individual participate in the process of identifying the accommodation solution to ensure it is suitable for the individual and their needs. Visual Redundancy on Computers - Ensure that important information

46

LEDS Collaboration in Action Workshop Accommodations | Open Energy  

Open Energy Info (EERE)

LEDS Collaboration in Action Workshop Accommodations LEDS Collaboration in Action Workshop Accommodations Jump to: navigation, search LEDSGP Logo.png Advancing climate-resilient low emission development around the world Home About Tools Expert Assistance Events Publications Join Us ACDS Workshop Participant Pack Agenda Accommodations Participants Location Arrival Form Open Space Sessions Speakers Presentations Links Contact Us Accommodations Accommodation will be provided free of charge for the evenings of Wednesday 21st and Thursday 22nd of March. All meals from Wednesday 21st (lunch time) through Friday 23rd (lunchtime) will be included free of charge. Powered by OpenEI ledsgp.org is built on the same platform as the popular Wikipedia site. Like Wikipedia, it is a "wiki" or website developed collaboratively by a

47

NERC Presentation: Accommodating High Levels of Variable Generation,  

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

NERC Presentation: Accommodating High Levels of Variable NERC Presentation: Accommodating High Levels of Variable Generation, October 29, 2010 NERC Presentation: Accommodating High Levels of Variable Generation, October 29, 2010 North American Electric Reliability Corporation (NERC) presentation to the Electricity Advisory Committee, October 29, 2010, on accommodating high levels of variable electricity eneration. Variable resources are types of electric power generation that rely on an uncontrolled, "variable" fuel (e.g. wind, sunlight, waves, tidal forces, and some types of rivers) to generate electricity. Most renewablesfall into this category. Reliably integrating these resources into the bulk power system will require significant changes to traditional methods used for system planning and operation. Ongoing efforts brought together by NERC and its stakeholders

48

Modeling of Hydraulically Controlled Exchange Flow in the Bosphorus Strait  

Science Conference Proceedings (OSTI)

Recent hydrographic observations obtained in the Bosphorus Strait illustrate several features of the flow that may be related with the internal hydraulics. A two-layer numerical model indicates that the two-way exchange flow may indeed be subject ...

Temel Oguz; Emin Özsoy; Mohammed A. Latif; Halil I. Sur; Ümit Ünlüata

1990-07-01T23:59:59.000Z

49

Graduate Medical Education Committee (GMEC) Policy on Accommodations for Disabilities  

E-Print Network (OSTI)

Graduate Medical Education Committee (GMEC) Policy on Accommodations for Disabilities will be required to provide medical verification of a medical condition that he or she believes is a disability Institutional Requirements Approved by GMEC 1/12/07 II.D.4.n Office of Graduate Medical Education West Virginia

Mohaghegh, Shahab

50

Manifold gasket accommodating differential movement of fuel cell stack  

DOE Patents (OSTI)

A gasket for use in a fuel cell system having at least one externally manifolded fuel cell stack, for sealing the manifold edge and the stack face. In accordance with the present invention, the gasket accommodates differential movement between the stack and manifold by promoting slippage at interfaces between the gasket and the dielectric and between the gasket and the stack face.

Kelley, Dana A. (New Milford, CT); Farooque, Mohammad (Danbury, CT)

2007-11-13T23:59:59.000Z

51

Using FQFD to analyze island accommodation management in fuzzy linguistic preferences  

Science Conference Proceedings (OSTI)

Tourists' service management has become a strategic issue for hospitality industry in tourism management field. By improving accommodation performances, hospitality firms increase customer satisfaction and gain market shares. Nonetheless, most previously ... Keywords: FQFD, Fuzzy linguistic preferences, Island accommodation management

Ling-Zhong Lin; Wen-Chiang Chen; Tsun-Jin Chang

2011-06-01T23:59:59.000Z

52

DOE Electricity Transmission System Workshop  

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

(including regional diversity, AC-DC transmission and distribution solutions, microgrids, energy storage, and centralized-decentralized control) * Accommodates two-way flows...

53

DOE Solar Decathlon: Iowa State University: Accommodating Environmental  

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

Interlock House and its exhibit signage at Solar Decathlon 2009. Interlock House and its exhibit signage at Solar Decathlon 2009. Enlarge image Iowa State's Interlock House continues to educate the public about energy efficiency and renewable energy at its permanent location at Honey Creek Resort State Park. (Credit: Jim Tetro/U.S. Department of Energy Solar Decathlon) Who: Iowa State University What: Interlock House Where: Honey Creek State Park 12633 Resort Drive Moravia, Iowa 52571 Map This House Public tours: For tour information, call 877-677-3344. Solar Decathlon 2009 Iowa State University: Accommodating Environmental Education The Iowa State University team saw its vision become reality when it sold Interlock House to the Iowa Department of Natural Resources after the U.S. Department of Energy Solar Decathlon 2009. This purchase ensured the house

54

Is classroom management possible for disabled teachers, with or without accommodation?.  

E-Print Network (OSTI)

??The central question of the thesis “Is classroom management possible for disabled teachers with or without accommodation?” is addressed through a review of the literature,… (more)

Hazen, Martha A

2012-01-01T23:59:59.000Z

55

Can U.S. Supply Accommodate Shifts to Diesel-Fueled Light-Duty ...  

U.S. Energy Information Administration (EIA)

Can U.S. Supply Accommodate Shifts to Diesel-Fueled Light-Duty Vehicles? ... the automobile manufacturers probably face the largest diesel-vehicle challenges in the ...

56

Microsoft Word - Accommodates All Generation Storage Options_Approved_2009_07_01_DISCLAIMER.docx  

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

ACCOMMODATES ALL ACCOMMODATES ALL GENERATION AND STORAGE OPTIONS Developed for the U.S. Department of Energy Office of Electricity Delivery and Energy Reliability by the National Energy Technology Laboratory June 2009 Office of Electricity Delivery and Energy Reliability v 3.0 Accommodates All Generation and Storage Options 1 DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference therein to any

57

Plasma waves reflection from a boundary with specular accommodative boundary conditions  

E-Print Network (OSTI)

In the present work the linearized problem of plasma wave reflection from a boundary of a half--space is solved analytically. Specular accommodative conditions of plasma wave reflection from plasma boundary are taken into consideration. Wave reflectance is found as function of the given parameters of the problem, and its dependence on the normal electron momentum accommodation coefficient is shown by the authors. The case of resonance when the frequency of self-consistent electric field oscillations is close to the proper (Langmuir) plasma oscillations frequency, namely, the case of long wave limit is analyzed. Refs. 17. Figs. 6.

N. V. Gritsienko; A. V. Latyshev; A. A. Yushkanov

2010-01-06T23:59:59.000Z

58

NEW TERMS OF ACCOMMODATION: BENJAMIN ELMANS ON THEIR OWN TERMS AND EARLY MODERN GLOBAL  

E-Print Network (OSTI)

NEW TERMS OF ACCOMMODATION: BENJAMIN ELMANS ON THEIR OWN TERMS AND EARLY MODERN GLOBAL NETWORK-1850, the subtitle of Benjamin Elmans On Their Terms, hardly captures the depth of the historiographic revision role to science, that the very idea that Chinese developed science ,,on their own terms

Elman, Benjamin

59

Accommodation of Uranium into the Garnet Structure Sergey V.Yudintsev1  

E-Print Network (OSTI)

Accommodation of Uranium into the Garnet Structure Sergey V.Yudintsev1 , Marya I. Lapina1 for uranium, the CaO ­ Fe2O3 ­ Al2O3 ­ SiO2 ­ ZrO2 ­ Gd2O3 ­ UO2 system was studied. Experiments were- corporation of U was found to be greatly dependent on the phase composition. Uranium content decreased from 18

Utsunomiya, Satoshi

60

Industrial fouling: problem characterization, economic assessment, and review of prevention, mitigation, and accommodation techniques  

Science Conference Proceedings (OSTI)

A comprehensive overview of heat exchanger fouling in the manufacturing industries is provided. Specifically, this overview addresses: the characteristics of industrial fouling problems; the mitigation and accommodation techniques currently used by industry; and the types and magnitude of costs associated with industrial fouling. A detailed review of the fouling problems, costs and mitigation techniques is provided for the food, textile, pulp and paper, chemical, petroleum, cement, glass and primary metals industries.

Garrett-Price, B.A.; Smith, S.A.; Watts, R.L.

1984-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "accommodates two-way flows" 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

NIST Time and Frequency Transfer using the Two Way ...  

Science Conference Proceedings (OSTI)

... to the 1 ns level, but this requires a portable earth station ... For questions or more information contact Marc Weiss at mweiss@boulder.nist.gov. Home.

62

Sequence stratigraphic interpretation methods for low-accommodation, alluvial depositional sequences: applications to reservoir characterization of Cut Bank field, Montana  

E-Print Network (OSTI)

In South Central Cut Bank Sand Unit (SCCBSU) of Cut Bank field, primary production and waterflood projects have resulted in recovery of only 29 % of the original oil in place from heterogeneous, fluvial sandstone deposits. Using highresolution sequence stratigraphy and geostatistical analysis, I developed a geologic model that may improve the ultimate recovery of oil from this field. In this study, I assessed sequence stratigraphic concepts for continental settings and extended the techniques to analyze low-accommodation alluvial systems of the Cut Bank and Sunburst members of the lower Kootenai formation (Cretaceous) in Cut Bank field. Identification and delineation of five sequences and their bounding surfaces led to a better understanding of the reservoir distribution and variability. Recognition of stacking patterns allowed for the prediction of reservoir rock quality. Within each systems tract, the best quality reservoir rocks are strongly concentrated in the lowstand systems tract. Erosional events associated with falling baselevel resulted in stacked, communicated (multistory) reservoirs. The lowermost Cut Bank sandstone has the highest reservoir quality and is a braided stream parasequence. Average net-to-gross ratio value (0.6) is greater than in other reservoir intervals. Little additional stratigraphically untapped oil is expected in the lowermost Cut Bank sandstone. Over most of the SCCBSU, the Sunburst and the upper Cut Bank strata are valley-fill complexes with interfluves that may laterally compartmentalize reservoir sands. Basal Sunburst sand (Sunburst 1, average net-to-gross ratio ~0.3) has better reservoir quality than other Sunburst or upper Cut Bank sands, but its reservoir quality is significantly less than that of lower Cut Bank sand. Geostatistical analysis provided equiprobable representations of the heterogeneity of reservoirs. Simulated reservoir geometries resulted in an improved description of reservoir distribution and connectivity, as well as occurrences of flow barriers. The models resulting from this study can be used to improve reservoir management and well placement and to predict reservoir performance in Cut Bank field. The technical approaches and tools from this study can be used to improve descriptions of other oil and gas reservoirs in similar depositional systems.

Ramazanova, Rahila

2006-12-01T23:59:59.000Z

63

Continuum modeling of two-phase flows  

SciTech Connect

Continuum modeling of two-phase flows can essentially be achieved in two ways. The first approach, the so-called continuum theory of mixtures, ignores the details of the flow occurring on the microscopic level, while the second one is the result of some averaging procedure. Although they both lead, as expected, to the same set of basic equations, they differ strongly in their spirit when closure equations have to be found. In the present report, we have attempted to give a brief critical review of both approaches, to compare them and to discuss some of the major difficulties which arise. It is shown that the application of the continuum theory of mixtures is, in most cases, questionable and that the only appropriate way of finding closure equations, besides correlating experimental results, consists in a useful investigation of the microscopic flow pattern associated with an adequate averaging technique.

Bataille, J.; Kestin, J.

1981-12-01T23:59:59.000Z

64

Passive air cooling of liquid metal-cooled reactor with double vessel leak accommodation capability  

DOE Patents (OSTI)

A passive and inherent shutdown heat removal method with a backup air flow path which allows decay heat removal following a postulated double vessel leak event in a liquid metal-cooled nuclear reactor is disclosed. The improved reactor design incorporates the following features: (1) isolation capability of the reactor cavity environment in the event that simultaneous leaks develop in both the reactor and containment vessels; (2) a reactor silo liner tank which insulates the concrete silo from the leaked sodium, thereby preserving the silo`s structural integrity; and (3) a second, independent air cooling flow path via tubes submerged in the leaked sodium which will maintain shutdown heat removal after the normal flow path has been isolated. 5 figures.

Hunsbedt, A.; Boardman, C.E.

1995-04-11T23:59:59.000Z

65

Passive air cooling of liquid metal-cooled reactor with double vessel leak accommodation capability  

SciTech Connect

A passive and inherent shutdown heat removal method with a backup air flow path which allows decay heat removal following a postulated double vessel leak event in a liquid metal-cooled nuclear reactor. The improved reactor design incorporates the following features: (1) isolation capability of the reactor cavity environment in the event that simultaneous leaks develop in both the reactor and containment vessels; (2) a reactor silo liner tank which insulates the concrete silo from the leaked sodium, thereby preserving the silo's structural integrity; and (3) a second, independent air cooling flow path via tubes submerged in the leaked sodium which will maintain shutdown heat removal after the normal flow path has been isolated.

Hunsbedt, Anstein (Los Gatos, CA); Boardman, Charles E. (Saratoga, CA)

1995-01-01T23:59:59.000Z

66

FISCHERPLOTS: An Excel spreadsheet for computing Fischer plots of accommodation change in cyclic carbonate successions in both the time and depth domains  

Science Conference Proceedings (OSTI)

Fischer plots are plots of accommodation (derived by calculating cumulative departure from mean cycle thickness) versus cycle number or stratigraphic distance (proxies for time), for cyclic carbonate platforms. Although many workers have derived programs ... Keywords: Accommodation space, Excel spreadsheet, Fischer plots, Parasequence, Sea level

Antun Husinec; Danko Basch; Brett Rose; J. Fred Read

2008-03-01T23:59:59.000Z

67

Time-resolved fluorescence decay measurements for flowing particles  

DOE Patents (OSTI)

Time-resolved fluorescence decay measurements are disclosed for flowing particles. An apparatus and method for the measurement and analysis of fluorescence for individual cells and particles in flow are described, wherein the rapid measurement capabilities of flow cytometry and the robust measurement and analysis procedures of time-domain fluorescence lifetime spectroscopy are combined. A pulse-modulated CW laser is employed for excitation of the particles. The characteristics and the repetition rate of the excitation pulses can be readily adjusted to accommodate for fluorescence decays having a wide range of lifetimes. 12 figs.

Deka, C.; Steinkamp, J.A.

1999-06-01T23:59:59.000Z

68

Assembly flow simulation of a radar  

Science Conference Proceedings (OSTI)

A discrete event simulation model has been developed to predict the assembly flow time of a new radar product. The simulation was the key tool employed to identify flow constraints. The radar, production facility, and equipment complement were designed, arranged, and selected to provide the most manufacturable assembly possible. A goal was to reduce the assembly and testing cycle time from twenty-six weeks to six weeks. A computer software simulation package (SLAM II) was utilized as the foundation a for simulating the assembly flow time. FORTRAN subroutines were incorporated into the software to deal with unique flow circumstances that were not accommodated by the software. Detailed information relating to the assembly operations was provided by a team selected from the engineering, manufacturing management, inspection, and production assembly staff. The simulation verified that it would be possible to achieve the cycle time goal of six weeks. Equipment and manpower constraints were identified during the simulation process and adjusted as required to achieve the flow with a given monthly production requirement. The simulation is being maintained as a planning tool to be used to identify constraints in the event that monthly output is increased. ``What-if`` studies have been conducted to identify the cost of reducing constraints caused by increases in output requirement.

Rutherford, W.C.; Biggs, P.M.

1993-10-01T23:59:59.000Z

69

FLOW GATING  

DOE Patents (OSTI)

BS>This invention is a fast gating system for eiectronic flipflop circuits. Diodes connect the output of one circuit to the input of another, and the voltage supply for the receiving flip-flop has two alternate levels. When the supply is at its upper level, no current can flow through the diodes, but when the supply is at its lower level, current can flow to set the receiving flip- flop to the same state as that of the circuit to which it is connected. (AEC)

Poppelbaum, W.J.

1962-12-01T23:59:59.000Z

70

Flow cytometer  

DOE Patents (OSTI)

A Faraday cage enclosing the flow chamber of a cytometer and ground planes associated with each field deflection plate in concert therewith inhibit electric fields from varying the charge on designated events/droplets and further concentrates and increases forces applied to a charged event passing therethrough for accurate focus thereof while concomitantly inhibiting a potential shock hazard.

van den Engh, Ger (Seattle, WA)

1995-01-01T23:59:59.000Z

71

Flow cytometer  

DOE Patents (OSTI)

A Faraday cage is described which encloses the flow chamber of a cytometer. Ground planes associated with each field deflection plate inhibit electric fields from varying the charge on designated events/droplets and further concentrates. They also increase forces applied to a passing charged event for accurate focus while concomitantly inhibiting a potential shock hazard. 4 figs.

Van den Engh, G.

1995-11-07T23:59:59.000Z

72

1999 EMC: Accommodations  

Science Conference Proceedings (OSTI)

Jul 2, 1999 ... Therefore, early registration and reservations are essential. ... UCSB residence halls and dining facilities are located within a 5-10 minute walk ...

73

SRI2013 | Hotel Accommodations  

Science Conference Proceedings (OSTI)

... blocks of rooms in two local hotels: ... DC North/Gaithersburg hotel (apparently booked up). ... Cornell High Energy Synchrotron Source; Canadian Light ...

74

AMR for low Mach number reacting flow  

Science Conference Proceedings (OSTI)

We present a summary of recent progress on the development and application of adaptive mesh refinement algorithms for low Mach number reacting flows. Our approach uses a form of the low Mach number equations based on a general equation of state that discretely conserves both mass and energy. The discretization methodology is based on a robust projection formulation that accommodates large density contrasts. The algorithm supports modeling of multicomponent systems and incorporates an operator-split treatment of stiff reaction terms. The basic computational approach is embedded in an adaptive projection framework that uses structured hierarchical grids with subcycling in time that preserves the discrete conservation properties of the underlying single-grid algorithm. We present numerical examples illustrating the application of the methodology to turbulent premixed combustion and nuclear flames in type Ia supernovae.

Bell, John B.

2004-01-16T23:59:59.000Z

75

Hydropower Technology Roundup Report: Accommodating Wear and Tear Effects on Hydroelectric Facilities Operating to Provide Ancillary Services: TR-113584-V4  

Science Conference Proceedings (OSTI)

Ancillary services are special generation services necessary to maintain both power quality and system integrity. This report aims to provide useful information on accommodating wear and tear of hydropower units when operated to produce ancillary services. The information contained in this report can help hydro plant owners and operators: o better understand wear and tear effects, o devise strategies to mitigate these effects, and o determine the costs associated with wear and tear. This information shou...

2001-08-30T23:59:59.000Z

76

Improved Fluid Flow Measurements: Feedwater Flow  

Science Conference Proceedings (OSTI)

This report describes the combined results of a utility survey and site visits concerning feedwater flow measurement in fossil-fueled power plants. In addition, a summary is provided of the technologies available to measure the volumetric feedwater flow rate in plants. This volumetric flow rate can be converted to a mass flow rate by knowing the pressure and temperature of the flow media. Velocity meters, differential pressure meters, and other closed-conduit flowmeters are discussed along with ...

2012-11-28T23:59:59.000Z

77

Use of time history speckle pattern and pulsed photoacoustic techniques to detect the self-accommodating transformation in a Cu-Al-Ni shape memory alloy  

Science Conference Proceedings (OSTI)

Continuous and pulsed electromagnetic radiation was used to detect the self-accommodation mechanism on a polycrystalline Cu-13.83 wt.%Al-2.34 wt.%Ni shape memory alloy. Rectangular samples of this alloy were mechanically polished to observe the austenite and martensite phases. The samples were cooled in liquid nitrogen prior to the experiments to obtain the martensite phase. Using a dynamic speckle technique with a continuous wave laser we obtained the time history of the speckle pattern image and monitored the surface changes caused by the self-accommodation mechanism during the inverse (martensitic to austenitic) transformation. Using a photoacoustic technique based on a pulsed laser source it was also possible to detect the self-accommodation phenomena in a bulk sample. For comparison purposes, we used differential scanning calorimetry (DSC) to detect the critical temperatures of transformation and use these as reference to evaluate the performance of the optical and photoacoustical techniques. In all cases, the same range of temperature was obtained during the inverse transformation. From these results, we conclude that time history speckle pattern (THSP) and pulsed photoacoustic are complementary techniques; they are non-destructive and useful to detect surface and bulk martensitic transformation induced by a temperature change.

Sanchez-Arevalo, F.M., E-mail: fsanchez@iim.unam.mx [CCADET - Universidad Nacional Autonoma de Mexico, A.P. 70-186, Mexico D.F., C.P. 04510 (Mexico); Aldama-Reyna, W. [Departamento Academico de Fisica, Universidad Nacional de Trujillo, Trujillo (Peru); Lara-Rodriguez, A.G. [Instituto de Investigaciones en Materiales, Universidad Nacional Autonoma de Mexico (Mexico); Garcia-Fernandez, T. [Universidad Autonoma de la Ciudad de Mexico (UACM), Prolongacion San Isidro 151, Col. San Lorenzo Tezonco, Mexico DF, C.P. 09790 (Mexico); Pulos, G. [Instituto de Investigaciones en Materiales, Universidad Nacional Autonoma de Mexico (Mexico); Trivi, M. [Centro de Investigaciones Opticas, Universidad de la Plata (Argentina); Villagran-Muniz, M. [CCADET - Universidad Nacional Autonoma de Mexico, A.P. 70-186, Mexico D.F., C.P. 04510 (Mexico)

2010-05-15T23:59:59.000Z

78

Capacitance-based prover for gas flow meters  

E-Print Network (OSTI)

The focus of this research was to examine a novel method for calibrating natural gas flow meters. This new method can accommodate very large flow rates and it avoids common problems associated with current meter proving techniques. In this method, the amount of gas accumulated in a vessel of fixed. volume is determined by measuring the change in capacitance of the vessel with respect to time. Because the accumulator has a fixed volume, the problems inherent with the mechanical motions involved in volumetric provers such as bell provers and piston provers are eliminated. Accurate measurements can also be made in larger vessels than would be feasible for gravimetric provers, especially for in situ calibrations.

Pipkins, Sean Patrick

1995-01-01T23:59:59.000Z

79

Hanford Tank Farms Waste Certification Flow Loop Test Plan  

Science Conference Proceedings (OSTI)

A future requirement of Hanford Tank Farm operations will involve transfer of wastes from double shell tanks to the Waste Treatment Plant. As the U.S. Department of Energy contractor for Tank Farm Operations, Washington River Protection Solutions anticipates the need to certify that waste transfers comply with contractual requirements. This test plan describes the approach for evaluating several instruments that have potential to detect the onset of flow stratification and critical suspension velocity. The testing will be conducted in an existing pipe loop in Pacific Northwest National Laboratory’s facility that is being modified to accommodate the testing of instruments over a range of simulated waste properties and flow conditions. The testing phases, test matrix and types of simulants needed and the range of testing conditions required to evaluate the instruments are described

Bamberger, Judith A.; Meyer, Perry A.; Scott, Paul A.; Adkins, Harold E.; Wells, Beric E.; Blanchard, Jeremy; Denslow, Kayte M.; Greenwood, Margaret S.; Morgen, Gerald P.; Burns, Carolyn A.; Bontha, Jagannadha R.

2010-01-01T23:59:59.000Z

80

flow_measurements_cryogenic  

Science Conference Proceedings (OSTI)

... A dynamic weighing system is used to measure ... using liquid nitrogen at flow rates of 1 ... For volumetric flow rate measurement, the uncertainty in fluid ...

2013-06-17T23:59:59.000Z

Note: This page contains sample records for the topic "accommodates two-way flows" 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

Multiphase flow calculation software  

DOE Patents (OSTI)

Multiphase flow calculation software and computer-readable media carrying computer executable instructions for calculating liquid and gas phase mass flow rates of high void fraction multiphase flows. The multiphase flow calculation software employs various given, or experimentally determined, parameters in conjunction with a plurality of pressure differentials of a multiphase flow, preferably supplied by a differential pressure flowmeter or the like, to determine liquid and gas phase mass flow rates of the high void fraction multiphase flows. Embodiments of the multiphase flow calculation software are suitable for use in a variety of applications, including real-time management and control of an object system.

Fincke, James R. (Idaho Falls, ID)

2003-04-15T23:59:59.000Z

82

Multiphase Flow Modeling Research  

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

Science Chris Guenther, Director Computational Science Division RUA Spring Meeting, Morgantown, WV March 2013 2 NETL's Multiphase Flow Science Team * The Multiphase Flow Science...

83

Carrier sense data highway system. [Patent for a two-way Data Transmission System  

DOE Patents (OSTI)

A data transmission system is disclosed which includes a transmission medium which has a certain propagation delay time over its length. A number of data stations are successively coupled to the transmission medium for communicating with one another. Each of the data stations includes a transmitter for originating signals, each signal beginning with a carrier of a duration which is at least the propagation delay time of the transmission medium. Each data station also includes a receiver which receives other signals from other data stations and inhibits operation of the transmitter at the same data station when a carrier of another signal is received.

Frankel, R.

1981-04-30T23:59:59.000Z

84

Power-Controlled Feedback and Training for Two-way MIMO Channels  

E-Print Network (OSTI)

Most communication systems use some form of feedback, often related to channel state information. The common models used in analyses either assume perfect channel state information at the receiver and/or noiseless state feedback links. However, in practical systems, neither is the channel estimate known perfectly at the receiver and nor is the feedback link perfect. In this paper, we study the diversity multiplexing tradeoff considering the errors in training the receiver and the errors in the feedback link for FDD systems, where the forward and the feedback are independent MIMO channels. Our key result is that diversity-multiplexing performance with one-bit of feedback information is identical to systems with more feedback bits. Thus, asymptotically in SNR, more than one bit of feedback does not improve the system performance. Furthermore, the one-bit performance is identical to the system which has perfect channel state information at the receiver along with noiseless feedback link. This achievability uses ...

Aggarwal, Vaneet

2009-01-01T23:59:59.000Z

85

Bits About the Channel: Multi-round Protocols for Two-way Fading Channels  

E-Print Network (OSTI)

Most communication systems use some form of feedback, often related to channel state information. In this paper, we study diversity multiplexing tradeoff for both FDD and TDD systems, when both receiver and transmitter knowledge about the channel is noisy and potentially mismatched. For FDD systems, we first extend the achievable tradeoff region for 1.5 rounds of message passing to get higher diversity compared to the best known scheme, in the regime of higher multiplexing gains. We then break the mold of all current channel state based protocols by using multiple rounds of conferencing to extract more bits about the actual channel. This iterative refinement of the channel increases the diversity order with every round of communication. The protocols are on-demand in nature, using high powers for training and feedback only when the channel is in poor states. The key result is that the diversity multiplexing tradeoff with perfect training and K levels of perfect feedback can be achieved, even when there are er...

Aggarwal, Vaneet

2009-01-01T23:59:59.000Z

86

Two-Way Feedback Interaction between the Thermohaline and Wind-Driven Circulations  

Science Conference Proceedings (OSTI)

The thermohaline circulation (THC) affects the meridional atmospheric temperature gradient and therefore the atmospheric wind and the wind-driven ocean circulation. The wind-driven circulation (WDC), in turn, affects the THC by the advection of ...

Douglas G. MacMynowski; Eli Tziperman

2006-05-01T23:59:59.000Z

87

Cell Bounds in Two-Way Contingency Tables Based on Conditional Frequencies  

Science Conference Proceedings (OSTI)

Statistical methods for disclosure limitation (or control) have seen coupling of tools from statistical methodologies and operations research. For the summary and release of data in the form of a contingency table some methods have focused on evaluation ... Keywords: Confidentiality, Contingency tables, Integer programming, Linear programming, Statistical disclosure control, Tabular data

Byran Smucker; Aleksandra B. Slavkovi?

2008-09-01T23:59:59.000Z

88

Two-Way Air–Sea Coupling: A Study of the Adriatic  

Science Conference Proceedings (OSTI)

High-resolution numerical simulations of the Adriatic Sea using the Navy Coastal Ocean Model (NCOM) and Coupled Ocean–Atmosphere Mesoscale Prediction System (COAMPS) were conducted to examine the impact of the coupling strategy (one versus two ...

Julie Pullen; James D. Doyle; Richard P. Signell

2006-05-01T23:59:59.000Z

89

Successes and challenges of instructional strategies in two-way bilingual immersion  

E-Print Network (OSTI)

training in the following areas: Learning Headquarters, Focused Approach, Writing for Excellence, WRITE Institute Project, Systematic

Hernández, Ana Margarita

2011-01-01T23:59:59.000Z

90

Capitalizing on Two-Way Communications for Demand Response -- Vendor Overview  

Science Conference Proceedings (OSTI)

This report is part of a two-volume study on communication technologies for demand response. Communications and controls technologies can automate much of the work in a utility's demand response program. This automation can make programs easier for customers to use, therefore making them more attractive and robust. This volume focuses on communication technologies currently available for automated demand response communications. The report also provides an overview of major technology vendors whose produ...

2003-11-25T23:59:59.000Z

91

Commitment is a Two-Way Street: Toyota, California and NUMMI  

E-Print Network (OSTI)

Ohnsman and Kae Inoue, “Toyota Will Shut California Plant inJeffrey Liker and Michael Hoseus, Toyota Culture: The Heartand Soul of the Toyota Way (New York: McGraw- Hill, 2008),

Shaiken, Harley

2010-01-01T23:59:59.000Z

92

Commitment is a Two-Way Street: Toyota, California and NUMMI  

E-Print Network (OSTI)

Golden State still love Prius? ” The Sacramento Bee, Feb.the main market for the Prius, by far,” according to Jesseaccounts for one in four Prius sales in the U.S. NUMMI would

Shaiken, Harley

2010-01-01T23:59:59.000Z

93

Successes and challenges of instructional strategies in two-way bilingual immersion  

E-Print Network (OSTI)

boards Thematic leveled-readers Test taking reading strategies Focus wall Interactive graphic organizers Summarize and sequence Oral

Hernández, Ana Margarita

2011-01-01T23:59:59.000Z

94

A Two-Way Nested Global-Regional Dynamical Core on the Cubed-Sphere Grid  

Science Conference Proceedings (OSTI)

A nested-grid model is constructed using the Geophysical Fluid Dynamics Laboratory finite-volume dynamical core on the cubed sphere. The use of a global grid avoids the need for externally imposed lateral boundary conditions, and the use of the ...

Lucas M. Harris; Shian-Jiann Lin

2013-01-01T23:59:59.000Z

95

Quick Start Guide There are two ways to access COS Funding  

E-Print Network (OSTI)

search terms entered are connected by the Boolean connector OR. In addition, searches retrieve embedded are always ranked by relevancy. 1. Enter your search terms into the text box. 2. Click COS Search. Advanced, or Sponsor). 3. Enter your search terms into the boxes. Additional fields are available to enter more search

Ronquist, Fredrik

96

An Experiment in Two-Way Communication with a Multivariable Moored System in Coastal Waters  

Science Conference Proceedings (OSTI)

An experimental data acquisition system (telepack) was interfaced with a multivariable moored system in order to transmit physical and biooptical data from a coastal mooring site to a shore-based work station. The study site was located off the ...

T. D. Dickey; R. H. Douglass; D. Manov; D. Bogucki; P. C. Walker; P. Petrelis

1993-08-01T23:59:59.000Z

97

Portable wastewater flow meter  

DOE Patents (OSTI)

A portable wastewater flow meter particularly adapted for temporary use at a single location in measuring the rate of liquid flow in a circular entrance conduit of a sewer manhole both under free flow and submerged, open channel conditions and under fill pipe, surcharged conditions, comprising an apparatus having a cylindrical external surface and an inner surface that constricts the flow through the apparatus in such a manner that a relationship exists between (1) the difference between the static pressure head of liquid flowing through the entrance of the apparatus and the static pressure head of liquid flowing through the constriction, and (2) the rate of liquid flow through the apparatus.

Hunter, Robert M. (320 S. Wilson Ave., Bozeman, MT 59715)

1999-02-02T23:59:59.000Z

98

Portable wastewater flow meter  

DOE Patents (OSTI)

A portable wastewater flow meter particularly adapted for temporary use at a single location in measuring the rate of liquid flow in a circular entrance conduit of a sewer manhole both under free flow and submerged, open channel conditions and under full pipe, surcharged conditions, comprising an apparatus having a cylindrical external surface and an inner surface that constricts the flow through the apparatus in such a manner that a relationship exists between (1) the difference between the static pressure head of liquid flowing through the entrance of the apparatus and the static pressure head of liquid flowing through the constriction, and (2) the rate of liquid flow through the apparatus.

Hunter, Robert M. (320 S. Wilson Ave., Bozeman, MT 59715)

1990-01-01T23:59:59.000Z

99

Separator Design for Use in High GVF Multiphase Flow  

E-Print Network (OSTI)

The requirement of bringing an outside coolant source to run through the seals of a multiphase pump has always been a costly endeavor. Using a separator to extract liquid from the exhaust of the pump to use as a coolant is often more expensive than providing an outside source of coolant. This research proposes a cost effective separator design which efficiently separates the liquid from gas, while maintaining a high enough residence time to remove any gas entrainment, and separates only the seal flush requirement by letting any excess liquids carryover with the gas. Conventional multiphase separators operate by substantially decreasing the velocity of the mixture, which reduces the drag force put forth by the gasses and allows gravity to force the liquids downward. Gas-Liquid Cylindrical Cyclones (GLCCs) operate by increasing the velocity of the mixture, using radial force to separate liquids and gasses. This technique requires a smaller diameter vessel to achieve separation. The separator in this research uses gravity as the separation force while maintaining a pipe diameter similar to the GLCC. This way, only standard pipe and pipe fittings are used. The effectiveness of this design is measured two ways. First, efficiency is studied at varying gas volume fractions (GVFs), velocities, pressures, and pipe diameters. Second, the length of air entrainment (LAE) is measured at the same varying conditions. The efficiency and air entrainment studies provide design recommendations to accommodate seal flush requirements and size limitations. The following investigation also offers further areas of research to improve the understanding and modeling of using standard pipe and pipe fittings to create more effective design equations.

Cihak, Daniel

2012-08-01T23:59:59.000Z

100

Unsteady flow volumes  

SciTech Connect

Flow volumes are extended for use in unsteady (time-dependent) flows. The resulting unsteady flow volumes are the 3 dimensional analog of streamlines. There are few examples where methods other than particle tracing have been used to visualize time varying flows. Since particle paths can become convoluted in time there are additional considerations to be made when extending any visualization technique to unsteady flows. We will present some solutions to the problems which occur in subdivision, rendering, and system design. We will apply the unsteady flow volumes to a variety of field types including moving multi-zoned curvilinear grids.

Becker, B.G.; Lane, D.A.; Max, N.L.

1995-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "accommodates two-way flows" 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

Structure of Offshore Flow  

Science Conference Proceedings (OSTI)

The horizontal and vertical structure of the mean flow and turbulent fluxes are examined using aircraft observations taken near a barrier island on the east coast of the United States during offshore flow periods. The spatial structure is ...

Dean Vickers; L. Mahrt; Jielun Sun; Tim Crawford

2001-05-01T23:59:59.000Z

102

Ultrasonic flow metering system  

DOE Patents (OSTI)

A system for determining the density, flow velocity, and mass flow of a fluid comprising at least one sing-around circuit that determines the velocity of a signal in the fluid and that is correlatable to a database for the fluid. A system for determining flow velocity uses two of the inventive circuits with directional transmitters and receivers, one of which is set at an angle to the direction of flow that is different from the others.

Gomm, Tyler J. (Meridian, ID); Kraft, Nancy C. (Idaho Falls, ID); Mauseth, Jason A. (Pocatello, ID); Phelps, Larry D. (Pocatello, ID); Taylor, Steven C. (Idaho Falls, ID)

2002-01-01T23:59:59.000Z

103

Elbow mass flow meter  

SciTech Connect

Elbow mass flow meter. The present invention includes a combination of an elbow pressure drop generator and a shunt-type mass flow sensor for providing an output which gives the mass flow rate of a gas that is nearly independent of the density of the gas. For air, the output is also approximately independent of humidity.

McFarland, Andrew R. (College Station, TX); Rodgers, John C. (Santa Fe, NM); Ortiz, Carlos A. (Bryan, TX); Nelson, David C. (Santa Fe, NM)

1994-01-01T23:59:59.000Z

104

Redox Flow Batteries: a Review  

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

1137-1164 Date Published 102011 ISSN 1572-8838 Keywords Flow battery, Flow cell, Redox, Regenerative fuel cell, Vanadium Abstract Redox flow batteries (RFBs) are enjoying a...

105

Efficient Flow-Sensitive Interprocedural Computation of Pointer-Induced Aliases and Side Effects  

E-Print Network (OSTI)

We present practical approximation methods for computing interprocedural aliases and side effects for a program written in a language that includes pointers, reference parameters and recursion. We present the following results: 1) An algorithm for flow-sensitive interprocedural alias analysis which is more precise and efficient than the best interprocedural method known. 2) An extension of traditional flow-insensitive alias analysis which accommodates pointers and provides a framework for a family of algorithms which trade off precision for efficiency. 3) An algorithm which correctly computes side effects in the presence of pointers. Pointers cannot be correctly handled by conventional methods for side effect analysis. 4) An alias naming technique which handles dynamically allocated objects and guarantees the correctness of data-flow analysis. 5) A compact representation based on transitive reduction which does not result in a loss of precision and improves precision in some cases. 6)...

Jong-deok Choi; Michael Burke; Paul Carini

1993-01-01T23:59:59.000Z

106

Numerical simulation of laminar reacting flows with complex chemistry  

SciTech Connect

We present an adaptive algorithm for low Mach number reacting flows with complex chemistry. Our approach uses a form of the low Mach number equations that discretely conserves both mass and energy. The discretization methodology is based on a robust projection formulation that accommodates large density contrasts. The algorithm uses an operator-split treatment of stiff reaction terms and includes effects of differential diffusion. The basic computational approach is embedded in an adaptive projection framework that uses structured hierarchical grids with subcycling in time that preserves the discrete conservation properties of the underlying single-grid algorithm. We present numerical examples illustrating the performance of the method on both premixed and non-premixed flames.

Day, Marcus S.; Bell, John B.

1999-12-01T23:59:59.000Z

107

Lateral flow strip assay  

DOE Patents (OSTI)

A lateral flow strip assay apparatus comprising a housing; a lateral flow strip in the housing, the lateral flow strip having a receiving portion; a sample collection unit; and a reagent reservoir. Saliva and/or buccal cells are collected from an individual using the sample collection unit. The sample collection unit is immersed in the reagent reservoir. The tip of the lateral flow strip is immersed in the reservoir and the reagent/sample mixture wicks up into the lateral flow strip to perform the assay.

Miles, Robin R. (Danville, CA); Benett, William J. (Livermore, CA); Coleman, Matthew A. (Oakland, CA); Pearson, Francesca S. (Livermore, CA); Nasarabadi, Shanavaz L. (Livermore, CA)

2011-03-08T23:59:59.000Z

108

NETL: Novel Flow Sheet for Low Energy CO2 Capture Enabled by Biocatalyst  

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

Novel Flow Sheet for Low Energy CO2 Capture Enabled by Biocatalyst Delivery System Novel Flow Sheet for Low Energy CO2 Capture Enabled by Biocatalyst Delivery System Project No.: DE-FE0012862 Akermin is conducting laboratory and integrated bench-scale pilot testing to validate the performance of their next generation Biocatalyst Delivery System (BDS). This effort builds upon work conducted under a previous project. The novel system enables on-stream replacement of the catalyst and enables integration with an advanced process flow scheme. Akermin is exploring an enzyme-enabled advanced process flow scheme with non-volatile capture solutions, AKM-24 and potassium carbonate. The advanced process flow scheme is projected to have lower parasitic energy requirements and lower capital costs resulting in greater than 30 percent reduction in the cost of capture. The novel flow sheet enabled by the biocatalyst permits regeneration at lower temperatures allowing heat integration with the lowest grade steam from the power plant and minimizing water consumption. The existing 500 standard liters per minute (SLPM) bench unit will be modified to incorporate the next-generation BDS, accommodate the new process flow scheme, and reduce heat loss for better quantification of energy performance. The modified bench unit will be operated at the National Carbon Capture Center on actual flue gas.

109

Solids mass flow determination  

DOE Patents (OSTI)

Method and apparatus for determining the mass flow rate of solids mixed with a transport fluid to form a flowing mixture. A temperature differential is established between the solids and fluid. The temperature of the transport fluid prior to mixing, the temperature of the solids prior to mixing, and the equilibrium temperature of the mixture are monitored and correlated in a heat balance with the heat capacities of the solids and fluid to determine the solids mass flow rate.

Macko, Joseph E. (Hempfield Township, Westmoreland County, PA)

1981-01-01T23:59:59.000Z

110

Turbulent flow in graphene  

E-Print Network (OSTI)

We demonstrate the possibility of a turbulent flow of electrons in graphene in the hydrodynamic region, by calculating the corresponding turbulent probability density function. This is used to calculate the contribution of the turbulent flow to the conductivity within a quantum Boltzmann approach. The dependence of the conductivity on the system parameters arising from the turbulent flow is very different from that due to scattering.

Kumar S. Gupta; Siddhartha Sen

2009-11-03T23:59:59.000Z

111

Multiple sort flow cytometer  

DOE Patents (OSTI)

A flow cytometer utilizes multiple lasers for excitation and respective fluorescence of identified dyes bonded to specific cells or events to identify and verify multiple events to be sorted from a sheath flow and droplet stream. Once identified, verified and timed in the sheath flow, each event is independently tagged upon separation from the flow by an electrical charge of +60, +120, or +180 volts and passed through oppositely charged deflection plates with ground planes to yield a focused six way deflection of at least six events in a narrow plane.

Van den Engh, Ger (Seattle, WA); Esposito, Richard J. (Seattle, WA)

1996-01-01T23:59:59.000Z

112

Droplet Laden Flow Data  

Science Conference Proceedings (OSTI)

... Flow Past a Heated Cylinder, Atomization and Sprays, 2006, 16(6 ... Numerical Modeling and Experimental Measurements of Water Spray Impact and ...

2013-07-15T23:59:59.000Z

113

Black String Flow  

E-Print Network (OSTI)

We give an exact description of the steady flow of a black string into a planar horizon. The event horizon is out of equilibrium and provides a simple, exact instance of a `flowing black funnel' in any dimension D>=5. It is also an approximation to a smooth intersection between a black string and a black hole, in the limit in which the black hole is much larger than the black string thickness. The construction extends easily to more general flows, in particular charged flows.

Emparan, Roberto

2013-01-01T23:59:59.000Z

114

Visualization of Fluid Flow  

Science Conference Proceedings (OSTI)

... Goujon and J. Devaney, Large Scale Simulations of Single and Multi- Component Flow in Porous Media in Proceedings of SPIE: The International ...

2010-12-15T23:59:59.000Z

115

1997 EMC: Housing Accommodations Information  

Science Conference Proceedings (OSTI)

This form is downloadable as an Adobe Acrobat (.pdf) file. Reservations must be received by May 23, 1997. Residence hall rooms without meals are not ...

116

SLAC National Accelerator Laboratory - Accommodations  

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

4.3 14 Super 8 3200 El Camino Real, Palo Alto 650-493-9085 4.7 15 Hotel California 2431 Ash St., Palo Alto 650-322-7666 5.0 16 Coronet Motel 2455 El Camino Real, Palo Alto...

117

Capabilities for information flow  

Science Conference Proceedings (OSTI)

This paper presents a capability-based mechanism for permissive yet secure enforcement of information-flow policies. Language capabilities have been studied widely, and several popular implementations, such as Caja and Joe-E, are available. By making ... Keywords: capabilities, information flow control

Arnar Birgisson; Alejandro Russo; Andrei Sabelfeld

2011-06-01T23:59:59.000Z

118

Elbow mass flow meter  

DOE Patents (OSTI)

The present invention includes a combination of an elbow pressure drop generator and a shunt-type mass flow sensor for providing an output which gives the mass flow rate of a gas that is nearly independent of the density of the gas. For air, the output is also approximately independent of humidity. 3 figs.

McFarland, A.R.; Rodgers, J.C.; Ortiz, C.A.; Nelson, D.C.

1994-08-16T23:59:59.000Z

119

Heat flow of Oregon  

DOE Green Energy (OSTI)

An extensive new heat flow and geothermal gradient data set for the State of Oregon is presented on a contour map of heat flow at a scale of 1:1,000,000 and is summarized in several figures and tables. The 1:1,000,000 scale heat flow map is contoured at 20 mW/m/sup 2/ (0.5 HFU) intervals. Also presented are maps of heat flow and temperature at a depth of 1 km averaged for 1/sup 0/ x 1/sup 0/ intervals. Histograms and averages of geothermal gradient and heat flow for the State of Oregon and for the various physiographic provinces within Oregon are also included. The unweighted mean flow for Oregon is 81.3 +- 2.7 mW/m/sup 2/ (1.94 +- 0.06 HFU). The average unweighted geothermal gradient is 65.3 +- 2.5/sup 0/C/km. The average heat flow value weighted on the basis of geographic area is 68 +- 5 mW/m/sup 2/ (1.63 +- 0.12 HFU) and the average weighted geothermal gradient is 55.0 +- 5/sup 0/C/km.

Blackwell, D.D.; Hull, D.A.; Bowen, R.G.; Steele, J.L.

1978-01-01T23:59:59.000Z

120

Multiphase Flow Modeling Research  

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

Science Science Chris Guenther, Director Computational Science Division RUA Spring Meeting, Morgantown, WV March 2013 2 NETL's Multiphase Flow Science Team * The Multiphase Flow Science Team develops physics-based simulation models to conduct applied scientific research. - Development of new theory - Extensive on-site and collaborative V&V efforts and testing - Engages in technology transfer - Applies the models to industrial scale problems. 3 Why is Multiphase Flow Science Needed? * Industry is increasingly relying on multiphase technologies to produce clean and affordable energy with carbon capture. * Unfortunately, the presence of a solid phase reduces the operating capacity of a typical energy device from its original design on average by 40% [1].

Note: This page contains sample records for the topic "accommodates two-way flows" 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

Shroud leakage flow discouragers  

SciTech Connect

A turbine assembly includes a plurality of rotor blades comprising a root portion, an airfoil having a pressure sidewall and a suction sidewall, and a top portion having a cap. An outer shroud is concentrically disposed about said rotor blades, said shroud in combination with said tip portions defining a clearance gap. At least one circumferential shroud leakage discourager is disposed within the shroud. The leakage discourager(s) increase the flow resistance and thus reduce the flow of hot gas flow leakage for a given pressure differential across the clearance gap to improve overall turbine efficiency.

Bailey, Jeremy Clyde (Middle Grove, NY); Bunker, Ronald Scott (Niskayuna, NY)

2002-01-01T23:59:59.000Z

122

RMOTC - Testing - Flow Assurance  

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

Flow Assurance Flow Assurance RMOTC Flow Loop Facility Layout Notice: As of July 15th 2013, the Department of Energy announced the intent to sell Naval Petroleum Reserve Number 3 (NPR3). The sale of NPR-3 will also include the sale of all equipment and materials onsite. A decision has been made by the Department of Energy to complete testing at RMOTC by July 1st, 2014. RMOTC will complete testing in the coming year with the currently scheduled testing partners. For more information on the sale of NPR-3 and sale of RMOTC equipment and materials please join our mailing list here. Over a decade ago, RMOTC began cooperatively building a full-scale facility to test new flow assurance technology, mainly in the areas of hydrates and paraffins. Today, RMOTC's test facility consists of five individual loop

123

Maple Sap Flow  

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

I know a little about this topic even though I am from Illinois which is far from the heart of maple syrup country. Sap flows from a maple tree by internal pressure caused by the...

124

Modons in Shear Flow  

Science Conference Proceedings (OSTI)

Modons in shear flow are computed as equilibrium solutions of the equivalent barotropic vorticity equation using a numerical Newton–Kantorovich iterative technique with double Fourier spectral expansion. The model is given a first guess of an ...

Sue Ellen Haupt; James C. McWilliams; Joseph J. Tribbia

1993-05-01T23:59:59.000Z

125

Stochastically scalable flow control  

Science Conference Proceedings (OSTI)

Recent advances in the mathematical analysis of flow control have prompted the creation of the Scalable TCP (STCP) and Exponential RED (E-RED) algorithms. These are designed to be scalable under the popular deterministic delay ...

Thomas Voice

2009-10-01T23:59:59.000Z

126

RG flows and instantons  

Science Conference Proceedings (OSTI)

In these two lectures I discuss RG flow solutions in (1,0) six dimensional supergravity involving SU(2) Yang-Mills instantons. in the conformally flat part of the 6D metric. The solutions interpolate between two (4,0) supersymmetric AdS{sub 3} Multiplication-Sign S{sup 3} backgrounds with different values of AdS{sub 3} and S{sup 3} radii and describe RG flows in the dual 2D SCFT. The flows described are of v.e.v. type, driven by a vacuum expectation value of a (not exactly) marginal operator of dimension 2 in the UV. We give an interpretation of the supergravity solution in terms of the D1/D5 system in type I string theory on K3, whose effective field theory is expected to flow to a (4,0) SCFT in the infrared.

Gava, Edi [INFN, Trieste (Italy)

2012-09-24T23:59:59.000Z

127

Parallel flow diffusion battery  

DOE Patents (OSTI)

A parallel flow diffusion battery for determining the mass distribution of an aerosol has a plurality of diffusion cells mounted in parallel to an aerosol stream, each diffusion cell including a stack of mesh wire screens of different density.

Yeh, Hsu-Chi (Albuquerque, NM); Cheng, Yung-Sung (Albuquerque, NM)

1984-08-07T23:59:59.000Z

128

Islands in Zonal Flow  

Science Conference Proceedings (OSTI)

The impact of a meridional gradient in sea surface temperature (warm toward the equator, cold toward the pole) on the circulation around an island is investigated. The upper-ocean eastward geostrophic flow that balances such a meridional gradient ...

Michael A. Spall

2003-12-01T23:59:59.000Z

129

Parallel flow diffusion battery  

DOE Patents (OSTI)

A parallel flow diffusion battery for determining the mass distribution of an aerosol has a plurality of diffusion cells mounted in parallel to an aerosol stream, each diffusion cell including a stack of mesh wire screens of different density.

Yeh, H.C.; Cheng, Y.S.

1984-01-01T23:59:59.000Z

130

Casting Flow Chart  

Science Conference Proceedings (OSTI)

Figure: ...Fig. 1 Simplified flow diagram of the basic operations for producing a steel casting. Similar diagrams can be applied to other ferrous and nonferrous alloys produced by sand

131

Characterization of hydrotreating catalysts by reversed-flow gas chromatography  

SciTech Connect

A flow perturbation gas chromatographic method, called reversed-flow technique, was introduced in 1980 and has been used to study the kinetics of various surface-catalyzed reactions, as well as for other physicochemical measurements. A review on the method has already been published. The new technique is based on reversing the direction of flow of the carrier gas from time to time. It uses a conventional gas chromatograph with any kind of detector, accommodating in its oven a so-called sampling cell. This consists of a sampling column and a diffusion column and is connected to the carrier gas inlet and the detector via a four-port or six-port valve. By switching the valve from one position to the other, the carrier gas is made to flow through the sampling column either from D{sub 2} to D{sub 1} or in the reversed direction. The sampling column can be filled with a catalyst whereby it plays the role of a catalytic reactor, or it filled with a usual chromatographic material acting as a conventional separation column, or it can contain both kinds of solids. Moreover, this column can be completely empty of any solid material, when it simply acts as a sampling volume to produce chromatographic signals without any separation process. The diffusion column, which was not used in the early papers, is employed either as a device for feeding catalytic or chromatographic beds with a gas diffusion stream, or as a means to study slow rate processes, normally occurring within a gas chromatographic column and usually being described as broadening factors.

Katsanos, N.A. (Univ. of Patras (Greece))

1987-04-01T23:59:59.000Z

132

Three dimensional flow processor  

DOE Patents (OSTI)

The 3D-flow processor is a general purpose programmable data stream pipelined device that allows fast data movement in six directions for digital signal processing applications such as identifying objects in a matrix in a programmable form. The 3D-flow processor can be used in one dimensional, two dimensional, and three dimensional topologies capable of sustaining an input data rate of up to 100 million data (or frames) per second in a parallel processing system.

Crosetto, D.B.

1992-01-01T23:59:59.000Z

133

Increased Power Flow Guidebook  

Science Conference Proceedings (OSTI)

The Increased Power Flow (IPF) Guidebook is a state-of-the-art and best practices guidebook on increasing power flow capacities of existing overhead transmission lines, underground cables, power transformers, and substation equipment without compromising safety and reliability. The Guidebook discusses power system concerns and limiting conditions to increasing capacity, reviews available technology options and methods, illustrates alternatives with case studies, and analyzes costs and benefits of differe...

2005-11-16T23:59:59.000Z

134

Fluid Metrology Calibration Services - Water Flow  

Science Conference Proceedings (OSTI)

Fluid Metrology Calibration Services - Water Flow. Water Flow Calibrations 18020C. ... NIST provides calibration services for water flow meters. ...

2011-10-03T23:59:59.000Z

135

Advanced Flow-Battery Systems  

Science Conference Proceedings (OSTI)

Presentation Title, Advanced Flow-Battery Systems ... Abstract Scope, Flow- battery systems (FBS) were originally developed over 30 years ago and have since ...

136

Meridional Flow Field of Axisymmetric Flows in a Rotating Annulus  

Science Conference Proceedings (OSTI)

Measurements of the flow field were made of the axisymmetric flow in a differentially heated rotating fluid annulus by using a long-term tracking of a tracer particle. Its meridional flow profile is composed of a flow circulating in a large ...

T. Tajima; T. Nakamura

2000-09-01T23:59:59.000Z

137

Gas-liquid two phase flow through a vertical 90 elbow bend  

SciTech Connect

Pressure drop data are reported for two phase air-water flow through a vertical to horizontal 90 elbow bend set in 0.026 m i.d. pipe. The pressure drop in the vertical inlet tangent showed some significant differences to that found for straight vertical pipe. This was caused by the elbow bend partially choking the inflow resulting in a build-up of pressure and liquid in the vertical inlet riser and differences in the structure of the flow regimes when compared to the straight vertical pipe. The horizontal outlet tangent by contrast gave data in general agreement with literature even to exhibiting a drag reduction region at low liquid rates and gas velocities between 1 and 2 m s{sup -1}. The elbow bend pressure drop was best correlated in terms of l{sub e}/d determined using the actual pressure loss in the inlet vertical riser. The data showed a general increase with fluid rates that tapered off at high fluid rates and exhibited a negative pressure region at low rates. The latter was attributed to the flow being smoothly accommodated by the bend when it passed from slug flow in the riser to smooth stratified flow in the outlet tangent. A general correlation was presented for the elbow bend pressure drop in terms of total Reynolds numbers. A modified Lockhart-Martinelli model gave prediction of the data. (author)

Spedding, P.L.; Benard, E. [School of Aeronautical Engineering, Queen's University Belfast, BT9 5AH (United Kingdom)

2007-07-15T23:59:59.000Z

138

Formation flow channel blocking  

SciTech Connect

A method is claimed for selectively blocking high permeability flow channels in an underground hydrocarbon material bearing formation having flow channels of high permeability and having flow channels of lesser permeability. The method includes the following steps: introducing a blocking material fluid comprising a blocking material in a carrier into the flow channels through an injection well in communication with the formation; introducing a buffer fluid into the formation through the injection well for the buffer fluid to displace the blocking material fluid away from the injection well; allowing the blocking material to settle in the channels to resist displacement by fluid flowing through the channels; introducing a quantity of an activating fluid into the channels through the injection well at a sufficient rate for the activating fluid to displace the buffer fluid and finger into the high permeability channels to reach the blocking material in the high permeability channels without reaching the blocking material in the low permeability channels, the activating fluid being adapted to activate the blocking material which it reaches to cause blocking of the high permeability channels.

Kalina, A.I.

1982-11-30T23:59:59.000Z

139

Two-phase flow studies  

DOE Green Energy (OSTI)

The two-phase flow program is directed at understanding the hydrodynamics of two-phase flows. The two-phase flow regime is characterized by a series of flow patterns that are designated as bubble, slug, churn, and annular flow. Churn flow has received very little scientific attention. This lack of attention cannot be justified because calculations predict that the churn flow pattern will exist over a substantial portion of the two-phase flow zone in producing geothermal wells. The University of Houston is experimentally investigating the dynamics of churn flow and is measuring the holdup over the full range of flow space for which churn flow exists. These experiments are being conducted in an air/water vertical two-phase flow loop. Brown University has constructed and is operating a unique two-phase flow research facility specifically designed to address flow problems of relevance to the geothermal industry. An important feature of the facility is that it is dedicated to two-phase flow of a single substance (including evaporation and condensation) as opposed to the case of a two-component two-phase flow. This facility can be operated with horizontal or vertical test sections of constant diameter or with step changes in diameter to simulate a geothermal well profile.

Hanold, R.J.

1983-12-01T23:59:59.000Z

140

Energy Flow Energy Flow Energy Flow A.Ukleja, T.Tymieniecka, I.Skillicorn 1 Azimuthal asymmetry  

E-Print Network (OSTI)

Energy Flow Energy Flow Energy Flow A.Ukleja, T.Tymieniecka, I.Skillicorn 1 Azimuthal asymmetry using energy flow method Azimuthal angle distribution at Q2 >100 GeV2 Energy flow method.Ukleja on behalf of the ZEUS Collaboration #12; Energy Flow Energy Flow Energy Flow A.Ukleja, T.Tymieniecka, I

Note: This page contains sample records for the topic "accommodates two-way flows" 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

Flow Test | Open Energy Information  

Open Energy Info (EERE)

Flow Test Flow Test Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Flow Test Details Activities (38) Areas (33) Regions (1) NEPA(3) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Testing Techniques Parent Exploration Technique: Well Testing Techniques Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Flow tests provide information on permeability, recharge rates, reservoir pressures, fluid chemistry, and scaling. Thermal: Flow tests can measure temperature variations with time to estimate characteristics about the heat source. Dictionary.png Flow Test: Flow tests are typically conducted shortly after a well has been drilled to test its productivity. The well is opened and fluids are released, the

142

Microwave fluid flow meter  

DOE Patents (OSTI)

A microwave fluid flow meter is described utilizing two spaced microwave sensors positioned along a fluid flow path. Each sensor includes a microwave cavity having a frequency of resonance dependent upon the static pressure of the fluid at the sensor locations. The resonant response of each cavity with respect to a variation in pressure of the monitored fluid is represented by a corresponding electrical output which can be calibrated into a direct pressure reading. The pressure drop between sensor locations is then correlated as a measure of fluid velocity. In the preferred embodiment the individual sensor cavities are strategically positioned outside the path of fluid flow and are designed to resonate in two distinct frequency modes yielding a measure of temperature as well as pressure. The temperature response can then be used in correcting for pressure responses of the microwave cavity encountered due to temperature fluctuations.

Billeter, Thomas R. (Richland, WA); Philipp, Lee D. (Richland, WA); Schemmel, Richard R. (Lynchburg, VA)

1976-01-01T23:59:59.000Z

143

Mass-Loaded Flows  

E-Print Network (OSTI)

A key process within astronomy is the exchange of mass, momentum, and energy between diffuse plasmas in many types of astronomical sources (including planetary nebulae, wind-blown bubbles, supernova remnants, starburst superwinds, and the intracluster medium) and dense, embedded clouds or clumps. This transfer affects the large scale flows of the diffuse plasmas as well as the evolution of the clumps. I review our current understanding of mass-injection processes, and examine intermediate-scale structure and the global effect of mass-loading on a flow. I then discuss mass-loading in a variety of diffuse sources.

J. M. Pittard

2006-07-13T23:59:59.000Z

144

Flow cytometry apparatus  

DOE Patents (OSTI)

An obstruction across the flow chamber creates a one-dimensional convergence of a sheath fluid. A passageway in the obstruction directs flat cells near to the area of one-dimensional convergence in the sheath fluid to provide proper orientation of flat cells at fast rates. 6 figs.

Pinkel, D.

1987-11-30T23:59:59.000Z

145

Flow cytometry apparatus  

DOE Patents (OSTI)

An obstruction across the flow chamber creates a one dimensional convergence of a sheath fluid. A passageway in the construction directs flat cells near to the area of one dimensional convergence in the sheath fluid to provide proper orientation of flat cells at fast rates.

Pinkel, Daniel (Walnut Creek, CA)

1991-01-01T23:59:59.000Z

146

US energy flow, 1991  

SciTech Connect

Trends in energy consumption and assessment of energy sources are discussed. Specific topics discussed include: energy flow charts; comparison of energy use with 1990 and earlier years; supply and demand of fossil fuels (oils, natural gas, coal); electrical supply and demand; and nuclear power.

Borg, I.Y.; Briggs, C.K.

1992-06-01T23:59:59.000Z

147

Self-Organized Network Flows  

E-Print Network (OSTI)

A model for traffic flow in street networks or material flows in supply networks is presented, that takes into account the conservation of cars or materials and other significant features of traffic flows such as jam formation, spillovers, and load-dependent transportation times. Furthermore, conflicts or coordination problems of intersecting or merging flows are considered as well. Making assumptions regarding the permeability of the intersection as a function of the conflicting flows and the queue lengths, we find self-organized oscillations in the flows similar to the operation of traffic lights.

Helbing, D; Lämmer, S; Helbing, Dirk; Siegmeier, Jan; L\\"{a}mmer, Stefan

2007-01-01T23:59:59.000Z

148

Designing Axial Flow Fan for Flow and Noise  

E-Print Network (OSTI)

A comprehensive finite element methodology is developed to predict the compressible flow performance of a non-symmetric 7-blade axial flow fan, and to quantify the source strength and sound pressure levels at any location in the system. The acoustic and flow performances of the fan are predicted simultaneously using a computational aero-acoustic technique combining transient flow analysis and noise propagation. The calculated sound power levels compare favorably with the measured sound power data per AMCA 300-96 code.

Subrata Roy; Phillip Cho; Fred Périé; International Off-highway

1999-01-01T23:59:59.000Z

149

Lattice Boltzmann modeling of microchannel flow in slip flow regime  

Science Conference Proceedings (OSTI)

We present the lattice Boltzmann equation (LBE) with multiple relaxation times (MRT) to simulate pressure-driven gaseous flow in a long microchannel. We obtain analytic solutions of the MRT-LBE with various boundary conditions for the incompressible ... Keywords: Gas flow through microchannel, Lattice Boltzmann equation with multiple relaxation times, Slip flow

Frederik Verhaeghe; Li-Shi Luo; Bart Blanpain

2009-01-01T23:59:59.000Z

150

Modeling Turbulent Flow  

National Nuclear Security Administration (NNSA)

Turbulent Turbulent Flow with Implicit LES L.G. Margolin 1 Proceedings of the Joint Russian-American Five Laboratory Conference on Computational Mathematics/Physics 19-23 June, 2005 Vienna, Austria 1 Applied Physics Division, Los Alamos National Laboratory, Los Alamos, NM 87545, len@lanl.gov 1 Abstract Implicit large eddy simulation (ILES) is a methodology for modeling high Reynolds' num- ber flows that combines computational efficiency and ease of implementation with predictive calculations and flexible application. Although ILES has been used for more than fifteen years, it is only recently that significant effort has gone into providing a physical rationale that speaks to its capabilities and its limitations. In this talk, we will present new theoret- ical results aimed toward building a justification and discuss some remaining gaps in our understanding and our practical

151

flow_loop.indd  

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

FLOW ASSURANCE TEST LOOP FLOW ASSURANCE TEST LOOP Objective O ver a decade ago, RMOTC began cooperatively building a full-scale facility to test new fl ow assurance technology, mainly in the areas of hydrates and paraffi ns. Today, RMOTC's test facility consists of fi ve individual loop sections, including chilling and heated pipe-in-pipe water sections, bare lines, and a mixing section. The facility was designed to represent typical deepwater production systems in order to simulate full-scale tests and apply the results to fl ow assurance fi eld applications and technology. The current facility design consists of a 6" x 3,600 maximum allowable operating pressure test pipeline in fi ve separate loops. The test loops begin and ter- minate at a central location just north

152

TEP process flow diagram  

SciTech Connect

This presentation describes the development of the proposed Process Flow Diagram (PFD) for the Tokamak Exhaust Processing System (TEP) of ITER. A brief review of design efforts leading up to the PFD is followed by a description of the hydrogen-like, air-like, and waterlike processes. Two new design values are described; the mostcommon and most-demanding design values. The proposed PFD is shown to meet specifications under the most-common and mostdemanding design values.

Wilms, R Scott [Los Alamos National Laboratory; Carlson, Bryan [Los Alamos National Laboratory; Coons, James [Los Alamos National Laboratory; Kubic, William [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

153

Vanadium Redox Flow Batteries  

Science Conference Proceedings (OSTI)

The vanadium redox flow battery, sometimes abbreviated as VRB, is an energy storage technology with significant potential for application in a wide range of contexts. Vanadium redox batteries have already been used in a number of demonstrations in small-scale utility-scale applications, and it is believed that the technology is close to being viable for more widespread use. This report examines the vanadium redox technology, including technical performance and cost issues that drive its application today...

2007-03-30T23:59:59.000Z

154

Momentum Balance of Gravity Flows  

Science Conference Proceedings (OSTI)

A unified scale analysis of the momentum balance of downslope gravity flows is developed to organize previous theories for the case of negligible ambient flow and fixed temperature deficit scale. The values of several nondimensional parameters ...

L. Mahrt

1982-12-01T23:59:59.000Z

155

HYDROLYZED WOOD SLURRY FLOW MODELING  

E-Print Network (OSTI)

LBL-10090 UC-61 HYDROLYZED WOOD SLURRY FLOW MODELING JimLBL-10090 HYDROLYZED WOOD SLURRY FLOW MODELING Jim Wrathallconversion of hydrolyzed wood slurry to fuel oil, Based on

Wrathall, Jim

2012-01-01T23:59:59.000Z

156

Katabatic Wind in Opposing Flow  

Science Conference Proceedings (OSTI)

This paper presents a one-dimensional model of katabatic winds in ambient flow and examines types of possible solutions. Results presented in dimensionless form indicate that 1) cooling along a slope with upslope ambient flow can lead to tranquil ...

David R. Fitzjarrald

1984-04-01T23:59:59.000Z

157

Convective heat flow probe  

DOE Patents (OSTI)

A convective heat flow probe device is provided which measures heat flow and fluid flow magnitude in the formation surrounding a borehole. The probe comprises an elongate housing adapted to be lowered down into the borehole; a plurality of heaters extending along the probe for heating the formation surrounding the borehole; a plurality of temperature sensors arranged around the periphery of the probe for measuring the temperature of the surrounding formation after heating thereof by the heater elements. The temperature sensors and heater elements are mounted in a plurality of separate heater pads which are supported by the housing and which are adapted to be radially expanded into firm engagement with the walls of the borehole. The heat supplied by the heater elements and the temperatures measured by the temperature sensors are monitored and used in providing the desired measurements. The outer peripheral surfaces of the heater pads are configured as segments of a cylinder and form a full cylinder when taken together. A plurality of temperature sensors are located on each pad so as to extend along the length and across the width thereof, with a heating element being located in each pad beneath the temperature sensors. An expansion mechanism driven by a clamping motor provides expansion and retraction of the heater pads and expandable packet-type seals are provided along the probe above and below the heater pads.

Dunn, J.C.; Hardee, H.C.; Striker, R.P.

1984-01-09T23:59:59.000Z

158

Motivation for a combined data flow-control flow processor  

Science Conference Proceedings (OSTI)

Data flow sequencing and the directed graph program representation provide two important tools for the development of computer architectures which can exploit problem parallelism. Classical (control flow) architecture deal efficiently with other problems such as serial sequences and data storage which are not handled so well by a data flow architecture. A hybrid which incorporates features of a data flow architecture along with features of a control flow architecture has the potential to become an effective parallel architecture for a wide class of problems. 10 references.

Oxley, D.W.

1981-01-01T23:59:59.000Z

159

Information flow analysis for javascript  

Science Conference Proceedings (OSTI)

Modern Web 2.0 pages combine scripts from several sources into a single client-side JavaScript program with almost no isolation. In order to prevent attacks from an untrusted third-party script or cross-site scripting, tracking provenance of data is ... Keywords: eval, hybrid program analysis, implicit flow, information flow control, unstructured control flow

Seth Just; Alan Cleary; Brandon Shirley; Christian Hammer

2011-10-01T23:59:59.000Z

160

A turnstile mechanism for fronts propagating in fluid flows  

E-Print Network (OSTI)

We consider the propagation of fronts in a periodically driven flowing medium. It is shown that the progress of fronts in these systems may be mediated by a turnstile mechanism akin to that found in chaotic advection. We first define the modified ("active") turnstile lobes according to the evolution of point sources across a transport boundary. We then show that the lobe boundaries may be constructed from stable and unstable \\emph{burning invariant manifolds}---one-way barriers to front propagation analogous to traditional invariant manifolds for passive advection. Because the burning invariant manifolds (BIMs) are one-dimensional curves in a three-dimensional ($xy\\theta$) phase space, their projection into $xy$-space exhibits several key differences from their advective counterparts: (lobe) areas are not preserved, BIMs may self-intersect, and an intersection between stable and unstable BIMs does not map to another such intersection. These differences must be accommodated in the correct construction of the new turnstile. As an application, we consider a lobe-based treatment protocol for protecting an ocean bay from an invading algae bloom.

John R. Mahoney; Kevin A. Mitchell

2013-05-22T23:59:59.000Z

Note: This page contains sample records for the topic "accommodates two-way flows" 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

UZ Flow Models and Submodels  

SciTech Connect

The purpose of this report is to document the unsaturated zone (UZ) flow models and submodels, as well as the flow fields that have been generated using the UZ flow model(s) of Yucca Mountain, Nevada. In this report, the term ''UZ model'' refers to the UZ flow model and the several submodels, which include tracer transport, temperature or ambient geothermal, pneumatic or gas flow, and geochemistry (chloride, calcite, and strontium) submodels. The term UZ flow model refers to the three-dimensional models used for calibration and simulation of UZ flow fields. This work was planned in the ''Technical Work Plan (TWP) for: Unsaturated Zone Flow Analysis and Model Report Integration'' (BSC 2004 [DIRS 169654], Section 1.2.7). The table of included Features, Events, and Processes (FEPs), Table 6.2-11, is different from the list of included FEPs assigned to this report in the ''Technical Work Plan for: Unsaturated Zone Flow Analysis and Model Report Integration'' (BSC 2004 [DIRS 169654], Table 2.1.5-1), as discussed in Section 6.2.6. The UZ model has revised, updated, and enhanced the previous UZ model (BSC 2001 [DIRS 158726]) by incorporating the repository design with new grids, recalibration of property sets, and more comprehensive validation effort. The flow fields describe fracture-fracture, matrix-matrix, and fracture-matrix liquid flow rates, and their spatial distributions as well as moisture conditions in the UZ system. These three-dimensional UZ flow fields are used directly by Total System Performance Assessment (TSPA). The model and submodels evaluate important hydrogeologic processes in the UZ as well as geochemistry and geothermal conditions. These provide the necessary framework to test hypotheses of flow and transport at different scales, and predict flow and transport behavior under a variety of climatic conditions. In addition, the limitations of the UZ model are discussed in Section 8.11.

Y. Wu

2004-11-01T23:59:59.000Z

162

Fluid flow monitoring device  

DOE Patents (OSTI)

This invention consists of a flow meter and temperature measuring device comprising a tube with a body centered therein for restricting flow and a sleeve at the upper end of the tube to carry several channels formed longitudinally in the sleeve to the appropriate axial location where they penetrate the tube to allow pressure measurements and temperature measurements with thermocouples. The high pressure measurement is made using a channel penetrating the tube away from the body and the low pressure measurement is made at a location at the widest part of the body. An end plug seals the end of the device and holes at its upper end allow fluid to pass from the interior of the tube into a plenum. The channels are made by cutting grooves in the sleeve, the grooves widened at the surface of the sleeve and then a strip of sleeve material is welded to the grooves closing the channels. Preferably the sleeve is packed with powdered graphite before cutting the grooves and welding the strips.

McKay, M.D.; Sweeney, C.E.

1991-03-05T23:59:59.000Z

163

Ellipsoidal cell flow system  

SciTech Connect

The disclosure relates to a system incorporating an ellipsoidal flow chamber having light reflective walls for low level light detection in practicing cellular analysis. The system increases signal-to-noise ratio by a factor of ten over prior art systems. In operation, laser light passes through the primary focus of the ellipsoid. A controlled flow of cells simultaneously passes through this focus so that the laser light impinges on the cells and is modulated by the cells. The reflective walls of the ellipsoid reflect the cell-modulated light to the secondary focus of the ellipsoid. A tapered light guide at the secondary focus picks up a substantial portion of modulated reflective light and directs it onto a light detector to produce a signal. The signal is processed to obtain the intensity distribution of the modulated light and hence sought after characteristics of the cells. In addition, cells may be dyed so as to fluoresce in response to the laser light and their fluorescence may be processed as cell-modulated light above described. A light discriminating filter would be used to distinguish reflected modulated laser light from reflected fluorescent light.

Salzman, Gary C. (Los Alamos, NM); Mullaney, Paul F. (Los Alamos, NM)

1976-01-01T23:59:59.000Z

164

Radial flow heat exchanger  

DOE Patents (OSTI)

A radial flow heat exchanger (20) having a plurality of first passages (24) for transporting a first fluid (25) and a plurality of second passages (26) for transporting a second fluid (27). The first and second passages are arranged in stacked, alternating relationship, are separated from one another by relatively thin plates (30) and (32), and surround a central axis (22). The thickness of the first and second passages are selected so that the first and second fluids, respectively, are transported with laminar flow through the passages. To enhance thermal energy transfer between first and second passages, the latter are arranged so each first passage is in thermal communication with an associated second passage along substantially its entire length, and vice versa with respect to the second passages. The heat exchangers may be stacked to achieve a modular heat exchange assembly (300). Certain heat exchangers in the assembly may be designed slightly differently than other heat exchangers to address changes in fluid properties during transport through the heat exchanger, so as to enhance overall thermal effectiveness of the assembly.

Valenzuela, Javier (Hanover, NH)

2001-01-01T23:59:59.000Z

165

Application of Neutron Imaging to InvestigateFlow Through Fractures for EGS  

SciTech Connect

This paper will describe ongoing efforts at Oak Ridge National Laboratory to develop a unique experimental capability for investigating flow through porous and fractured geological media using neutron imaging techniques. This capability is expected to support numerous areas of investigation associated with flow processes relevant to EGS including, but not limited to: experimental visualization and measurement of velocity profiles and other flow characteristics to better inform reduced-order modeling of flow through fractures; laboratory scale validation of flow models and simulators; and a 'real-time' tool for studying geochemical rock/fluid interactions by noninvasively measuring material effects such as precipitation and dissolution in EGS representative conditions. Neutron scattering and attenuation based techniques have many distinctive advantages over other radiographic imaging methods for studying certain types of physical processes because cold and thermal neutrons are more highly attenuated by materials with large Hydrogen compositions while they more easily penetrate higher Z materials, such as those used in structural applications. Experiments exploiting this behavior may therefore be devised to study flow behaviors in samples even when thick pressure vessel walls and large sample masses are present. The objective of this project is to develop an experimental setup and methodology for taking EGS representative core samples with engineered fractures and fracture features, subjecting them to a triaxial stress state at EGS representative temperatures (up to 300 degrees C), and pumping high pressure fluid through the sample while imaging and measuring fluid flow characteristics using high flux neutron beams. This effort will take advantage of signature Oak Ridge National Laboratory facilities, including the Spallation Neutron Source and High Flux Isotope Reactor, as well as its core expertise in Neutron Science. Towards this end, a geothermal pressure test cell and flow system has been developed that can accommodate 1.5 diameter, 6 long core samples and apply a radial confining pressure up to 10,000 psi with fluid flow pressures up to 5,000 psi. This cell has been specially designed to optimize the transmission of neutrons and permit improved imaging of the interior of the sample of interest. Proof of principle measurements of the system have been performed and will be discussed in this paper. Techniques for injecting fluid contrast agents to permit visualization and quantification of flow profiles are also being developed and will be described along with future development plans.

Polsky, Yarom [ORNL; Anovitz, Lawrence {Larry} M [ORNL; Bilheux, Hassina Z [ORNL; Bingham, Philip R [ORNL; Carmichael, Justin R [ORNL

2013-01-01T23:59:59.000Z

166

Uranyl Nitrate Flow Loop  

Science Conference Proceedings (OSTI)

The objectives of the work discussed in this report were to: (1) develop a flow loop that would simulate the purified uranium-bearing aqueous stream exiting the solvent extraction process in a natural uranium conversion plant (NUCP); (2) develop a test plan that would simulate normal operation and disturbances that could be anticipated in an NUCP; (3) use the flow loop to test commercially available flowmeters for use as safeguards monitors; and (4) recommend a flowmeter for production-scale testing at an NUCP. There has been interest in safeguarding conversion plants because the intermediate products [uranium dioxide (UO{sub 2}), uranium tetrafluoride (UF{sub 4}), and uranium hexafluoride (UF{sub 6})] are all suitable uranium feedstocks for producing special nuclear materials. Furthermore, if safeguards are not applied virtually any nuclear weapons program can obtain these feedstocks without detection by the International Atomic Energy Agency (IAEA). Historically, IAEA had not implemented safeguards until the purified UF{sub 6} product was declared as feedstock for enrichment plants. H. A. Elayat et al. provide a basic definition of a safeguards system: 'The function of a safeguards system on a chemical conversion plant is in general terms to verify that no useful nuclear material is being diverted to use in a nuclear weapons program'. The IAEA now considers all highly purified uranium compounds as candidates for safeguarding. DOE is currently interested in 'developing instruments, tools, strategies, and methods that could be of use to the IAEA in the application of safeguards' for materials found in the front end of the nuclear fuel cycle-prior to the production of the uranium hexafluoride or oxides that have been the traditional starting point for IAEA safeguards. Several national laboratories, including Oak Ridge, Los Alamos, Lawrence Livermore, and Brookhaven, have been involved in developing tools or techniques for safeguarding conversion plants. This study was sponsored by the U.S. Department of Energy (DOE) NA-241, Office of Dismantlement and Transparency.

Ladd-Lively, Jennifer L [ORNL

2008-10-01T23:59:59.000Z

167

Instrumentation for Increased Power Flow  

Science Conference Proceedings (OSTI)

This report is the second Technical Update of the Instrumentation for Managing Increased Power Flow project, part of EPRI's Increased Power Flow (IPF) program. The project, initiated in 2006 and expected to continue for several years, studies the feasibility of new instrumentation to support increased power flow strategies. In 2007 the work focused on two primary developments: the Backscatter Sensor for the real-time measurement of transmission line temperature and current and the Emissivity Test Instrum...

2007-12-06T23:59:59.000Z

168

HYDROCARBON LIQUID FLOW CALIBRATION SERVICE ...  

Science Conference Proceedings (OSTI)

... and is the cross correlation coefficient ... a NIST Hydrocarbon Liquid Flow Calibration Facility ... FED2004-56790, 2004 Heat Transfer/Fluids Engineering ...

2012-05-21T23:59:59.000Z

169

Flow Batteries: A Historical Perspective  

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

Marvin Warshay *1976 Shunt Current Model, Paul Prokopius *1976 Interfaced an RFB with solar cells *1977 Electrode-Membrane-Flow Battery Testing *Largest polarization @ negative...

170

EPRI Coal-Flow Loop  

Science Conference Proceedings (OSTI)

This report is targeted at plant personnel responsible for coal-flow measurement and mill balancing that are using or are considering the use of online, in situ measurement technologies. Optimum combustion in a boiler requires careful control of coal and air flow to individual burners. Measuring in near real-time the mass flow rate of pneumatically conveyed pulverized coal in burner feed pipes is a critical element of such control. This report summarizes the findings for two online coal-flow instruments ...

2006-12-01T23:59:59.000Z

171

Patterns in Flowing Sand: Understanding the Physics of Granular Flow  

E-Print Network (OSTI)

Dense granular flows are often unstable and form inhomogeneous structures. Although significant advances have been recently made in understanding simple flows, instabilities of such flows are often not understood. We present experimental and numerical results that show the formation of longitudinal stripes that arise from instability of the uniform flowing state of granular media on a rough inclined plane. The form of the stripes depends critically on the mean density of the flow with a robust form of stripes at high density that consists of fast sliding plug-like regions (stripes) on top of highly agitated boiling material - a configuration reminiscent of the Leidenfrost effect when a droplet of liquid lifted by its vapor is hovering above a hot surface.

Tamas Borzsonyi; Robert E. Ecke; Jim N. McElwaine

2009-10-01T23:59:59.000Z

172

Split flow gasifier  

DOE Patents (OSTI)

A-moving bed coal gasifier for the production of tar-free, low ammonia fuel gas is described. The gasifier employs a combustion zone in a free-aboard area above the moving bed to burn coal fines to provide hot combustion gases for pyrolyzing and gasifying coal particulates in the moving bed to form fuel gas as the hot gases move co-currently with the downwardly moving coal particulates. The fuel gas contains entrained tars and ammonia compounds which contact hot char and ash in the moving bed and are cracked so that the fuel gas removed from the gasifier at a midpoint off-take is essentially tar-free and of low ammonia content. Concurrently with this gasification reaction, steam and an oxidant are introduced into a region below the moving bed to flow countercurrently to the downwardly moving bed to contact and react with carbon remaining in the char to create additional fuel gas which is also extracted from the gasifier at the mid-point off-take.

Halow, J.S.

1991-12-31T23:59:59.000Z

173

Turbine blade tip flow discouragers  

SciTech Connect

A turbine assembly comprises a plurality of rotating blade portions in a spaced relation with a stationery shroud. The rotating blade portions comprise a root section, a tip portion and an airfoil. The tip portion has a pressure side wall and a suction side wall. A number of flow discouragers are disposed on the blade tip portion. In one embodiment, the flow discouragers extend circumferentially from the pressure side wall to the suction side wall so as to be aligned generally parallel to the direction of rotation. In an alternative embodiment, the flow discouragers extend circumferentially from the pressure side wall to the suction side wall so as to be aligned at an angle in the range between about 0.degree. to about 60.degree. with respect to a reference axis aligned generally parallel to the direction of rotation. The flow discouragers increase the flow resistance and thus reduce the flow of hot gas flow leakage for a given pressure differential across the blade tip portion so as to improve overall turbine efficiency.

Bunker, Ronald Scott (Niskayuna, NY)

2000-01-01T23:59:59.000Z

174

Physics of two-phase flow: choked flow  

DOE Green Energy (OSTI)

It is shown that the basic equations governing the flow of a two-phase fluid, i.e., liquid and vapor, are natural extensions of those equations that describe single-phase flow. The exact form of the equations depends on the particular assumptions used to characterize the two-phase flow, i.e., the equations depend on the model chosen. In general the mathematical model is selected so as to retain as much of the physics of the phenomena as possible while at the same time permitting solutions to be obtained without undue complexity. The following quantities were computed for saturated water substance over the temperature range 100 to 250/sup 0/C and for saturated Refrigerant -114 over the range -20 to +70/sup 0/C: choking velocity, critical or choking flow density, and saturation properties. Tables of the results are given along with graphs of selected functions.

Maeder, P.F.; DiPippo, R.; Delor, M.; Dickinson, D.

1981-05-01T23:59:59.000Z

175

The transition from two phase bubble flow to slug flow  

E-Print Network (OSTI)

The process of transition from bubble to slug flow in a vertical pipe has been studied analytically and experimentally. An equation is presented which gives the agglomeration time as a function of void fraction, channel ...

Radovcich, Nick A.

1962-01-01T23:59:59.000Z

176

HYDROGEN ELECTROLYZER FLOW DISTRIBUTOR MODEL  

DOE Green Energy (OSTI)

The hybrid sulfur process (HyS) hydrogen electrolyzer consists of a proton exchange membrane (PEM) sandwiched between two porous graphite layers. An aqueous solution of sulfuric acid with dissolved SO{sub 2} gas flows parallel to the PEM through the porous graphite layer on the anode side of the electrolyzer. A flow distributor, consisting of a number of parallel channels acting as headers, promotes uniform flow of the anolyte fluid through the porous graphite layer. A numerical model of the hydraulic behavior of the flow distributor is herein described. This model was developed to be a tool to aid the design of flow distributors. The primary design objective is to minimize spatial variations in the flow through the porous graphite layer. The hydraulic data from electrolyzer tests consists of overall flowrate and pressure drop. Internal pressure and flow distributions are not measured, but these details are provided by the model. The model has been benchmarked against data from tests of the current electrolyzer. The model reasonably predicts the viscosity effect of changing the fluid from water to an aqueous solution of 30 % sulfuric acid. The permeability of the graphite layer was the independent variable used to fit the model to the test data, and the required permeability for a good fit is within the range literature values for carbon paper. The model predicts that reducing the number of parallel channels by 50 % will substantially improve the uniformity of the flow in the porous graphite layer, while maintaining an acceptable pressure drop across the electrolyzer. When the size of the electrolyzer is doubled from 2.75 inches square to 5.5 inches square, the same number of channels as in the current design will be adequate, but it is advisable to increase the channel cross-sectional flow area. This is due to the increased length of the channels.

Shadday, M

2006-09-28T23:59:59.000Z

177

Proper planning improves flow drilling  

Science Conference Proceedings (OSTI)

Underbalanced operations reduce formation damage, especially in horizontal wells where zones are exposed to mud for longer time periods. Benefits, risks, well control concerns, equipment and issues associated with these operations are addressed in this paper. Flow drilling raises many concerns, but little has been published on horizontal well control and flow drilling operations. This article covers planning considerations for flow drilling, but does not address horizontal ''overbalanced'' drilling because considerations and equipment are the same as in vertical overbalanced drilling and many references address that subject. The difference in well control between vertical and horizontal overbalanced drilling is fluid influx behavior and how that behavior affects kill operations.

Collins, G.J. (Marathon Oil Co., Houston, TX (United States))

1994-10-01T23:59:59.000Z

178

Definition: Flow Test | Open Energy Information  

Open Energy Info (EERE)

Flow Test Jump to: navigation, search Dictionary.png Flow Test Flow tests are typically conducted shortly after a well has been drilled to test its productivity. The well is opened...

179

Transitions between Baroclinic Flow Regimes  

Science Conference Proceedings (OSTI)

we use truncated spectral Eady models with two Ekman layers of different strength to investigate the baroclinic flow transitions observed in annulus experiments. Our analysis is both analytical and numerical As the dissipation parameter is varied ...

H-Y. Weng; A. Barcilon; J. Magnan

1986-08-01T23:59:59.000Z

180

Coal flows | OpenEI  

Open Energy Info (EERE)

Coal flows Coal flows Dataset Summary Description This dataset comes from the Energy Information Administration (EIA), and is part of the 2011 Annual Energy Outlook Report (AEO2011). This dataset is table 142, and contains only the reference case. The dataset uses million short tons. The data is broken down into steam coal exports to Europe, Asia and America. Source EIA Date Released April 26th, 2011 (3 years ago) Date Updated Unknown Keywords 2011 AEO Coal flows countries EIA exporting importing Data application/vnd.ms-excel icon AEO2011: World Steam Coal Flows By Importing Regions and Exporting Countries- Reference Case (xls, 103.7 KiB) Quality Metrics Level of Review Peer Reviewed Comment Temporal and Spatial Coverage Frequency Annually Time Period 2008-2035 License

Note: This page contains sample records for the topic "accommodates two-way flows" 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

Essays on international capital flows  

E-Print Network (OSTI)

This dissertation consists of three chapters on international capital flows. Chapter 1 emphasizes the importance of innovations in the investment opportunity set, captured by changes in expected asset returns, as an important ...

Brandão, Tatiana Glindmeier Didier

2008-01-01T23:59:59.000Z

182

Lattice splitting under intermittent flows  

E-Print Network (OSTI)

We study the splitting of regular square lattices subject to stochastic intermittent flows. By extensive Monte Carlo simulations we reveal how the time span until the occurence of a splitting depends on various flow patterns imposed on the lattices. Increasing the flow fluctuation frequencies shortens this time span which reaches a minimum before rising again due to inertia effects incorporated in the model. The size of the largest connected component after the splitting is rather independent of the flow fluctuations but sligthly decreases with the link capacities. Our results are relevant for assessing the robustness of real-life systems, such as electric power grids with a large share of renewable energy sources including wind turbines and photovoltaic systems.

Schläpfer, Markus

2010-01-01T23:59:59.000Z

183

Miniaturized flow injection analysis system  

DOE Patents (OSTI)

A chemical analysis technique known as flow injection analysis, wherein small quantities of chemical reagents and sample are intermixed and reacted within a capillary flow system and the reaction products are detected optically, electrochemically, or by other means. A highly miniaturized version of a flow injection analysis system has been fabricated utilizing microfabrication techniques common to the microelectronics industry. The microflow system uses flow capillaries formed by etching microchannels in a silicon or glass wafer followed by bonding to another wafer, commercially available microvalves bonded directly to the microflow channels, and an optical absorption detector cell formed near the capillary outlet, with light being both delivered and collected with fiber optics. The microflow system is designed mainly for analysis of liquids and currently measures 38.times.25.times.3 mm, but can be designed for gas analysis and be substantially smaller in construction.

Folta, James A. (Livermore, CA)

1997-01-01T23:59:59.000Z

184

Miniaturized flow injection analysis system  

DOE Patents (OSTI)

A chemical analysis technique known as flow injection analysis is described, wherein small quantities of chemical reagents and sample are intermixed and reacted within a capillary flow system and the reaction products are detected optically, electrochemically, or by other means. A highly miniaturized version of a flow injection analysis system has been fabricated utilizing microfabrication techniques common to the microelectronics industry. The microflow system uses flow capillaries formed by etching microchannels in a silicon or glass wafer followed by bonding to another wafer, commercially available microvalves bonded directly to the microflow channels, and an optical absorption detector cell formed near the capillary outlet, with light being both delivered and collected with fiber optics. The microflow system is designed mainly for analysis of liquids and currently measures 38{times}25{times}3 mm, but can be designed for gas analysis and be substantially smaller in construction. 9 figs.

Folta, J.A.

1997-07-01T23:59:59.000Z

185

Flow Acceleration and Mountain Drag*  

Science Conference Proceedings (OSTI)

Dynamic explanations of mountain drag usually invoke viscous effects and/or wave momentum flux by either Rossby or internal gravity waves. This paper explores an alternative mechanism in terms of the unsteadiness of the incident flow. The ...

Peter R. Bannon

1985-12-01T23:59:59.000Z

186

Studies of Flows in Plasmas  

SciTech Connect

Note a pdf document "DOE-flow-final-report' should be attached. If it somehow is not please notify Walter Gekelman (gekelman@physics.ucla.edu) who will e mail it directly

Gekelman, Walter; Morales, George; Maggs, James

2009-03-07T23:59:59.000Z

187

Longitudinal dispersion in vegetated flow  

E-Print Network (OSTI)

Vegetation is ubiquitous in rivers, estuaries and wetlands, strongly influencing both water conveyance and mass transport. The plant canopy affects both mean and turbulent flow structure, and thus both advection and ...

Murphy, Enda

2006-01-01T23:59:59.000Z

188

Parabolic flows on complex manifolds  

E-Print Network (OSTI)

Chapter 2 Convergence of the parabolic complex Monge-Amp`ere65] Streets, J. , Tian, G. A parabolic flow of pluriclosedGill, M. Convergence of the parabolic complex Monge-Amp` ere

Gill, Matthew Franklin

2012-01-01T23:59:59.000Z

189

Multiscale modeling in granular flow  

E-Print Network (OSTI)

Granular materials are common in everyday experience, but have long-resisted a complete theoretical description. Here, we consider the regime of slow, dense granular flow, for which there is no general model, representing ...

Rycroft, Christopher Harley

2007-01-01T23:59:59.000Z

190

Subcooled flow boiling of fluorocarbons  

E-Print Network (OSTI)

A study was conducted of heat transfer and hydrodynamic behavior for subcooled flow boiling of Freon-113, one of a group of fluorocarbons suitable for use in cooling of high-power-density electronic components. Problems ...

Murphy, Richard Walter

1971-01-01T23:59:59.000Z

191

2007 Estimated International Energy Flows  

Science Conference Proceedings (OSTI)

An energy flow chart or 'atlas' for 136 countries has been constructed from data maintained by the International Energy Agency (IEA) and estimates of energy use patterns for the year 2007. Approximately 490 exajoules (460 quadrillion BTU) of primary energy are used in aggregate by these countries each year. While the basic structure of the energy system is consistent from country to country, patterns of resource use and consumption vary. Energy can be visualized as it flows from resources (i.e. coal, petroleum, natural gas) through transformations such as electricity generation to end uses (i.e. residential, commercial, industrial, transportation). These flow patterns are visualized in this atlas of 136 country-level energy flow charts.

Smith, C A; Belles, R D; Simon, A J

2011-03-10T23:59:59.000Z

192

Increased Power Flow Guidebook - 2012  

Science Conference Proceedings (OSTI)

The EPRI Increased Power Flow (IPF) Guidebook is a state-of-the-art and best- practices reference and guidebook on increasing the power flow capacities of existing overhead transmission lines, underground cables, power transformers, and substation equipment, without compromising safety and reliability. The Guidebook discusses power system concerns and limiting conditions to increasing capacity, reviews available technology options and methods, illustrates the alternatives with case ...

2012-12-31T23:59:59.000Z

193

Increased Power Flow Guidebook - 2013  

Science Conference Proceedings (OSTI)

The EPRI Increased Power Flow (IPF) Guidebook is a state-of-the-art and best- practices reference and guidebook on increasing the power flow capacities of existing overhead transmission lines, underground cables, power transformers, and substation equipment, without compromising safety and reliability. The Guidebook discusses power system concerns and limiting conditions to increasing capacity, reviews available technology options and methods, illustrates the alternatives with case ...

2013-11-18T23:59:59.000Z

194

Acoustic concentration of particles in fluid flow  

DOE Patents (OSTI)

An apparatus for acoustic concentration of particles in a fluid flow includes a substantially acoustically transparent membrane and a vibration generator that define a fluid flow path therebetween. The fluid flow path is in fluid communication with a fluid source and a fluid outlet and the vibration generator is disposed adjacent the fluid flow path and is capable of producing an acoustic field in the fluid flow path. The acoustic field produces at least one pressure minima in the fluid flow path at a predetermined location within the fluid flow path and forces predetermined particles in the fluid flow path to the at least one pressure minima.

Ward, Michael D. (Los Alamos, NM); Kaduchak, Gregory (Los Alamos, NM)

2010-11-23T23:59:59.000Z

195

Accuracy of flow hoods in residential applications  

SciTech Connect

To assess whether houses can meet performance expectations, the new practice of residential commissioning will likely use flow hoods to measure supply and return grille airflows in HVAC systems. Depending on hood accuracy, these measurements can be used to determine if individual rooms receive adequate airflow for heating and cooling, to determine flow imbalances between different building spaces, to estimate total air handler flow and supply/return imbalances, and to assess duct air leakage. This paper discusses these flow hood applications and the accuracy requirements in each case. Laboratory tests of several residential flow hoods showed that these hoods can be inadequate to measure flows in residential systems. Potential errors are about 20% to 30% of measured flow, due to poor calibrations, sensitivity to grille flow non-uniformities, and flow changes from added flow resistance. Active flow hoods equipped with measurement devices that are insensitive to grille airflow patterns have an order of magnitude less error, and are more reliable and consistent in most cases. Our tests also show that current calibration procedures for flow hoods do not account for field application problems. As a result, a new standard for flow hood calibration needs to be developed, along with a new measurement standard to address field use of flow hoods. Lastly, field evaluation of a selection of flow hoods showed that it is possible to obtain reasonable results using some flow hoods if the field tests are carefully done, the grilles are appropriate, and grille location does not restrict flow hood placement.

Wray, Craig P.; Walker, Iain S.; Sherman, Max H.

2002-05-01T23:59:59.000Z

196

Flow assurance and multiphase pumping  

E-Print Network (OSTI)

A robust understanding and planning of production enhancement and flow assurance is required as petroleum E&P activities are targeting deepwaters and long distances. Different flow assurance issues and their solutions are put together in this work. The use of multiphase pumps as a flow assurance solution is emphasized. Multiphase pumping aids flow assurance in different ways. However, the problem causing most concern is sand erosion. This work involved a detection-based sand monitoring method. Our objectives are to investigate the reliability of an acoustic sand detector and analyze the feasibility of gel injection as a method to mitigate sand erosion. Use of a sand detector coupled with twin-screw pumps is studied under varying flow conditions. The feasibility of gel injection to reduce slip and transport produced solids through twin-screw pump is investigated. A unique full-scale laboratory with multiphase pumps was utilized to carry out the experimental tests. The test results indicate that acoustic sand detection works in a narrow window around the calibration signature. An empirical correlation for predicting the twin-screw pump performance with viscous fluids was developed. It shows good agreement in the practical operational limits – 50% to 100% speed. The results indicate that viscous gel injection should be an effective erosion mitigation approach as it reduces slip, the principle cause of erosive wear. To correlate the performance of viscous fluid injection to hydroabrasive wear, further experimental investigation is needed.

Nikhar, Hemant G.

2006-12-01T23:59:59.000Z

197

Oxygen Absorption in Cooling Flows  

E-Print Network (OSTI)

The inhomogeneous cooling flow scenario predicts the existence of large quantities of gas in massive elliptical galaxies, groups, and clusters that have cooled and dropped out of the flow. Using spatially resolved, deprojected X-ray spectra from the ROSAT PSPC we have detected strong absorption over energies ~0.4-0.8 keV intrinsic to the central ~1 arcmin of the galaxy, NGC 1399, the group, NGC 5044, and the cluster, A1795. These systems have amongst the largest nearby cooling flows in their respective classes and low Galactic columns. Since no excess absorption is indicated for energies below ~0.4 keV the most reasonable model for the absorber is warm, collisionally ionized gas with T=10^{5-6} K where ionized states of oxygen provide most of the absorption. Attributing the absorption only to ionized gas reconciles the large columns of cold H and He inferred from Einstein and ASCA with the lack of such columns inferred from ROSAT, and also is consistent with the negligible atomic and molecular H inferred from HI, and CO observations of cooling flows. The prediction of warm ionized gas as the product of mass drop-out in these and other cooling flows can be verified by Chandra, XMM, and ASTRO-E.

David A. Buote

2000-01-19T23:59:59.000Z

198

Copper 99/Cobre 99: Accommodations Information  

Science Conference Proceedings (OSTI)

The meeting will build on the success of three preceding conferences: Copper 87 , held in Vina del Mar, Chile; Copper 91/Cobre 91, held in Ottawa, Canada; and ...

199

Accommodation of liquid metal by cavity liners  

Science Conference Proceedings (OSTI)

Present liquid metal breeder reactor cell liner designs appear adequate to contain postulated leakages of lithium-lead alloy in an air or steam atmosphere and to contain lithium when inert atmospheres are present. If an air or steam atmosphere may be present in a cavity where lithium may accumulate under postulated accident conditions, then consideration of stainless steel liners and further testing is recommended. Lithium testing of faulted liners should also be considered. SOFIRE II and WATRE computer codes may be useful in establishing liner design requirements and in determining water release from concrete behind the liners (potential hydrogen production) for postulated leakages to steel-lined concrete cavities. 1 ref., 10 figs.

Jeppson, D.W.

1988-10-01T23:59:59.000Z

200

Accommodation of liquid metal by cavity liners  

Science Conference Proceedings (OSTI)

Present liquid metal breeder reactor cell liner designs appear adequate to contain postulated leakages of lithium-lead alloy in an air or steam atmosphere and to contain lithium when inert atmospheres are present. If an air or steam atmosphere may be present in a cavity where lithium amy accumulate under postulated accident conditions, then consideration of stainless steel liners and further testing is recommended. Lithium testing of faulted liners should also be considered. SOFIRE II and WATRe computer codes may be useful in establishing liner design requirements and in determining water release from concrete behind the liners (potential hydrogen production) for postulated leakages to steel-lined concrete cavities.

Jeppson, D.W.

1989-03-01T23:59:59.000Z

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


201

TMS Fall Meeting '98: Accommodations Information  

Science Conference Proceedings (OSTI)

Two restaurants available, Andiamo, which features renowned American/Italian cuisine and the Gaslight Club which offers steak and seafood in a "roaring ...

202

Materials Week '97: Accommodations Information - TMS  

Science Conference Proceedings (OSTI)

... be made through the Indianapolis Housing Bureau using the hotel reservation form, which is available here in portable document format--a .pdf file that can be ...

203

1998 Electronic Materials Conference: Accommodation Information  

Science Conference Proceedings (OSTI)

Vending machines, a laundry facility and a computer lab are also available inside the resident area. Lambeth Field Residence Hall: Two and three bedroom ...

204

2001 Electronic Materials Conference: Housing Accommodations  

Science Conference Proceedings (OSTI)

Therefore, early registration and reservations are essential. ... Common shower and restroom facilities are designated for men and women on each floor. Guests

205

2000 Electronic Materials Conference: Housing Accommodations  

Science Conference Proceedings (OSTI)

Therefore, early registration and reservations are essential. ... University of Denver residence halls and dining facilities are located within a 7–10 minute walk ...

206

Visualization and Diagnostics of Thermal Plasma Flows  

Science Conference Proceedings (OSTI)

Flow visualization is a key tool for the study of thermal plasma flows. Because of their high temperature and associated self emission, standard and high speed photography is commonly used for flow and temperature field visualization. Tracer techniques ... Keywords: d.c. plasma jet, enthalpy probe techniques, induction plasma, laser strobe, photographic techniques, schlieren, thermal plasma flows

M. I. Boulos

2001-01-01T23:59:59.000Z

207

Numerical length estimation for tubular flow reactors  

Science Conference Proceedings (OSTI)

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

Riccardo Fazio

1992-08-01T23:59:59.000Z

208

Valve for controlling solids flow  

DOE Patents (OSTI)

A valve for controlling the flow of solids comprises a vessel having an overflow point, an inlet line for discharging solids into the vessel positioned within the vessel such that the inlet line's discharge point is lower than the vessel's overflow point, and apparatus for introducing a fluidizing fluid into the vessel. The fluidizing fluid fluidizes the solids within the vessel so that they overflow at the vessel's overflow point. For the removal of nuclear waste product the vessel may be placed within a sealed container having a bottom connected transport line for transporting the solids to storage or other sites. The rate of solids flow is controlled by the flow rate of the fluidizing fluid and by V-notch weirs of different sizes spaced about the top of the vessel.

Staiger, M. Daniel (Idaho Falls, ID)

1985-01-01T23:59:59.000Z

209

Monitoring probe for groundwater flow  

DOE Patents (OSTI)

A monitoring probe for detecting groundwater migration. The monitor features a cylinder made of a permeable membrane carrying an array of electrical conductivity sensors on its outer surface. The cylinder is filled with a fluid that has a conductivity different than the groundwater. The probe is placed in the ground at an area of interest to be monitored. The fluid, typically saltwater, diffuses through the permeable membrane into the groundwater. The flow of groundwater passing around the permeable membrane walls of the cylinder carries the conductive fluid in the same general direction and distorts the conductivity field measured by the sensors. The degree of distortion from top to bottom and around the probe is precisely related to the vertical and horizontal flow rates, respectively. The electrical conductivities measured by the sensors about the outer surface of the probe are analyzed to determine the rate and direction of the groundwater flow.

Looney, Brian B. (Aiken, SC); Ballard, Sanford (Albuquerque, NM)

1994-01-01T23:59:59.000Z

210

Flow in geothermal wells. Part IV. Transition criteria for two-phase flow patterns  

DOE Green Energy (OSTI)

Detailed considerations justifying the criteria for transitions between flow patterns are presented. The following are covered: transition from bubble to plug (or slug) flow, transition from plug flow to froth flow, transition from froth to annular mist flow, and model comparisons. (MHR)

Bilicki, Z.; Kestin, J.

1980-12-01T23:59:59.000Z

211

Rinse trough with improved flow  

SciTech Connect

Novel rinse troughs accomplish thorough uniform rinsing. The troughs are suitable for one or more essentially planar objects having substantially the same shape. The troughs ensure that each surface is rinsed uniformly. The new troughs provide uniform rinse fluid flow over the objects' surfaces to accomplish a more thorough rinse than prior art troughs.

O' Hern, Timothy J. (Albuquerque, NM); Grasser, Thomas W. (Albuquerque, NM)

1998-01-01T23:59:59.000Z

212

Redox flow batteries: a review  

Science Conference Proceedings (OSTI)

Redox flow batteries (RFBs) are enjoying a renaissance due to their ability to store large amounts of electrical energy relatively cheaply and efficiently. In this review, we examine the components of RFBs with a focus on understanding the underlying physical processes. The various transport and kinetic phenomena are discussed along with the most common redox couples.

Weber, Adam Z. [Lawrence Berkeley National Laboratory (LBNL); Mench, Matthew M [ORNL; Meyers, Jeremy [University of Texas, Austin; Ross, Philip N. [Lawrence Berkeley National Laboratory (LBNL); Gostick, Jeffrey T. [McGill University, Montreal, Quebec; Liu, Qinghua [University of Tennessee, Knoxville (UTK)

2011-01-01T23:59:59.000Z

213

Wave–Mean Flow Statistics  

Science Conference Proceedings (OSTI)

A relation between the statistics of large-scale waves and the mean flow is derived from the potential enstrophy equations integrated over an isobaric surface. The difference between time-averaged zonal-mean state and the radiative-dynamical ...

Mark R. Schoeberl

1982-10-01T23:59:59.000Z

214

Shallow Water Flows in Channels  

Science Conference Proceedings (OSTI)

We consider the shallow water equations for flows through channels with arbitrary cross section. The system forms a hyperbolic set of balance laws. Exact steady-state solutions are available and are controlled by the relation between the bottom topography ... Keywords: Balance laws, Hyperbolic conservation laws, Steady-state solutions, Upwind schemes

Gerardo Hernández-Dueñas; Smadar Karni

2011-07-01T23:59:59.000Z

215

Superconducting flux flow digital circuits  

DOE Patents (OSTI)

A NOR/inverter logic gate circuit and a flip flop circuit implemented with superconducting flux flow transistors (SFFTs) are disclosed. Both circuits comprise two SFFTs with feedback lines. They have extremely low power dissipation, very high switching speeds, and the ability to interface between Josephson junction superconductor circuits and conventional microelectronics. 8 figs.

Hietala, V.M.; Martens, J.S.; Zipperian, T.E.

1995-02-14T23:59:59.000Z

216

Superconducting flux flow digital circuits  

DOE Patents (OSTI)

A NOR/inverter logic gate circuit and a flip flop circuit implemented with superconducting flux flow transistors (SFFTs). Both circuits comprise two SFFTs with feedback lines. They have extremely low power dissipation, very high switching speeds, and the ability to interface between Josephson junction superconductor circuits and conventional microelectronics.

Hietala, Vincent M. (Placitas, NM); Martens, Jon S. (Sunnyvale, CA); Zipperian, Thomas E. (Albuquerque, NM)

1995-01-01T23:59:59.000Z

217

Fluid Flow Within Fractured Porous Media  

Science Conference Proceedings (OSTI)

Fractures provide preferential flow paths to subterranean fluid flows. In reservoir scale modeling of geologic flows fractures must be approximated by fairly simple formulations. Often this is accomplished by assuming fractures are parallel plates subjected to an applied pressure gradient. This is known as the cubic law. An induced fracture in Berea sandstone has been digitized to perform numerical flow simulations. A commercially available computational fluid dynamics software package has been used to solve the flow through this model. Single phase flows have been compared to experimental works in the literature to evaluate the accuracy with which this model can be applied. Common methods of fracture geometry classification are also calculated and compared to experimentally obtained values. Flow through regions of the fracture where the upper and lower fracture walls meet (zero aperture) are shown to induce a strong channeling effect on the flow. This model is expanded to include a domain of surrounding porous media through which the flow can travel. The inclusion of a realistic permeability in this media shows that the regions of small and zero apertures contribute to the greatest pressure losses over the fracture length and flow through the porous media is most prevalent in these regions. The flow through the fracture is shown to be the largest contributor to the net flow through the media. From this work, a novel flow relationship is proposed for flow through fractured media.

Crandall, D.M.; Ahmadi, G. (Clarkson Univ., Potsdam, NY); Smith, D.H.; Bromhal, G.S.

2006-10-01T23:59:59.000Z

218

Effect of radial transport on compressor tip clearance flow structures and enhancement of stable flow range  

E-Print Network (OSTI)

The relation between tip clearance flow structure and axial compressor stall is interrogated via numerical simulations, to determine how casing treatment can result in improved flow range. Both geometry changes and flow ...

Nolan, Sean Patrick Rock

2005-01-01T23:59:59.000Z

219

Soluble Lead Flow Battery: Soluble Lead Flow Battery Technology  

SciTech Connect

GRIDS Project: General Atomics is developing a flow battery technology based on chemistry similar to that used in the traditional lead-acid battery found in nearly every car on the road today. Flow batteries store energy in chemicals that are held in tanks outside the battery. When the energy is needed, the chemicals are pumped through the battery. Using the same basic chemistry as a traditional battery but storing its energy outside of the cell allows for the use of very low cost materials. The goal is to develop a system that is far more durable than today’s lead-acid batteries, can be scaled to deliver megawatts of power, and which lowers the cost of energy storage below $100 per kilowatt hour.

None

2010-09-01T23:59:59.000Z

220

A laboratory scale supersonic combustive flow system  

DOE Green Energy (OSTI)

A laboratory scale supersonic flow system [Combustive Flow System (CFS)] which utilizes the gaseous products of methane-air and/or liquid fuel-air combustion has been assembled to provide a propulsion type exhaust flow field for various applications. Such applications include providing a testbed for the study of planar two-dimensional nozzle flow fields with chemistry, three-dimensional flow field mixing near the exit of rectangular nozzles, benchmarking the predictive capability of various computational fluid dynamic codes, and the development and testing of advanced diagnostic techniques. This paper will provide a detailed description of the flow system and data related to its operation.

Sams, E.C.; Zerkle, D.K.; Fry, H.A.; Wantuck, P.J.

1995-02-01T23:59:59.000Z

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


221

Computational Fluid Dynamics Modeling of The Dalles Project: Effects of Spill Flow Distribution Between the Washington Shore and the Tailrace Spillwall  

DOE Green Energy (OSTI)

The U.S. Army Corps of Engineers-Portland District (CENWP) has ongoing work to improve the survival of juvenile salmonids (smolt) migrating past The Dalles Dam. As part of that effort, a spillwall was constructed to improve juvenile egress through the tailrace downstream of the stilling basin. The spillwall was designed to improve smolt survival by decreasing smolt retention time in the spillway tailrace and the exposure to predators on the spillway shelf. The spillwall guides spillway flows, and hence smolt, more quickly into the thalweg. In this study, an existing computational fluid dynamics (CFD) model was modified and used to characterize tailrace hydraulics between the new spillwall and the Washington shore for six different total river flows. The effect of spillway flow distribution was simulated for three spill patterns at the lowest total river flow. The commercial CFD solver, STAR-CD version 4.1, was used to solve the unsteady Reynolds-averaged Navier-Stokes equations together with the k-epsilon turbulence model. Free surface motion was simulated using the volume-of-fluid (VOF) technique. The model results were used in two ways. First, results graphics were provided to CENWP and regional fisheries agency representatives for use and comparison to the same flow conditions at a reduced-scale physical model. The CFD results were very similar in flow pattern to that produced by the reduced-scale physical model but these graphics provided a quantitative view of velocity distribution. During the physical model work, an additional spill pattern was tested. Subsequently, that spill pattern was also simulated in the numerical model. The CFD streamlines showed that the hydraulic conditions were likely to be beneficial to fish egress at the higher total river flows (120 kcfs and greater, uniform flow distribution). At the lowest flow case, 90 kcfs, it was necessary to use a non-uniform distribution. Of the three distributions tested, splitting the flow evenly between Bay 7 and Bay 8 had hydraulics deemed most beneficial for egress by CENWP fisheries biologists and regional fishery agency representatives. The numerical and physical model results were very similar, building confidence in both hydraulic tools.

Rakowski, Cynthia L.; Serkowski, John A.; Richmond, Marshall C.

2010-12-01T23:59:59.000Z

222

Vertical Flow Wetland Pilot Study  

Science Conference Proceedings (OSTI)

This is an interim report to present the preliminary results of a study conducted by Duke Energy to test the potential effectiveness of vertical flow wetlands (VFWs) for the removal of selenium, mercury, and other related compounds from a flue gas desulfurization (FGD) discharge. These compounds commonly are found in and regulated for coal-fired utility water discharges. There is a widespread need for a cost-effective alternative to physiochemical treatment to maintain compliance for these parameters, on...

2008-12-08T23:59:59.000Z

223

Economics of Increased Power Flow  

Science Conference Proceedings (OSTI)

This report focuses on methodologies for evaluating the costs and benefits of the diverse technologies that can be used either individually or jointly to increase the flow of power through the transmission system. It begins by describing a broad slate of potential technologies and approaches for increasing transmission capacity and improving system efficiency and then provides an overall framework for assessing the benefits and costs of these technologies. Later sections cover the practical implementatio...

2010-12-21T23:59:59.000Z

224

Flow duct for nuclear reactors  

DOE Patents (OSTI)

Improved liquid sodium flow ducts for nuclear reactors are described wherein the improvement comprises varying the wall thickness of each of the walls of a polygonal tubular duct structure so that each of the walls is of reduced cross-section along the longitudinal center line and of a greater cross-section along wall junctions with the other walls to form the polygonal tubular configuration.

Straalsund, Jerry L. (Richland, WA)

1978-01-01T23:59:59.000Z

225

Countercurrent flow absorber and desorber  

DOE Patents (OSTI)

Countercurrent flow absorber and desorber devices are provided for use in absorption cycle refrigeration systems and thermal boosting systems. The devices have increased residence time and surface area resulting in improved heat and mass transfer characteristics. The apparatuses may be incorporated into open cycle thermal boosting systems in which steam serves both as the refrigerant vapor which is supplied to the absorber section and as the supply of heat to drive the desorber section of the system. 9 figs.

Wilkinson, W.H.

1984-10-16T23:59:59.000Z

226

The hidden geometry of ocean flows  

E-Print Network (OSTI)

We introduce a new global Lagrangian descriptor that is applied to flows with general time dependence (altimetric datasets). It succeeds in detecting simultaneously, with great accuracy, invariant manifolds, hyperbolic and non-hyperbolic flow regions.

Carolina Mendoza; Ana M Mancho

2010-03-01T23:59:59.000Z

227

Deep-Flow Variability at Drake Passage  

Science Conference Proceedings (OSTI)

A rotary empirical orthogonal function analysis of the currents measured in central Drake Passage during DRAKE 79 shows that the deep (2500 m) flow has the same spatial and temporal structure as the flow at 500 m, suggesting that current ...

John M. Klinck; Eileen E. Hofmann

1986-07-01T23:59:59.000Z

228

Flow interference in bluff body wakes  

Science Conference Proceedings (OSTI)

This paper presents a two-dimensional numerical simulation of fluid flow around a couple of identical circular cylinders aligned, respectively, along and orthogonal to the main-flow direction, at several distances. A lattice-Boltzmann method (LB) is ...

Rodrigo Surmas; Luís Orlando Emerich Dos Santos; Paulo Cesar Philippi

2003-06-01T23:59:59.000Z

229

Regional Drainage Flows in the Pacific Northwest  

Science Conference Proceedings (OSTI)

An analysis of regional drainage flows in the Pacific Northwest is presented using results from a network of surface observations and a series of simulations carried out with a nested mesoscale model. The flows, which occur regularly in ...

J. C. Doran; S. Zhong

1994-06-01T23:59:59.000Z

230

Preservation of probabilistic information flow under refinement  

Science Conference Proceedings (OSTI)

Information flow properties, which describe confidentiality requirements, are not generally preserved under behavior refinement. This article describes a formal framework for refinement relations between nondeterministic probabilistic processes that ... Keywords: CSP, Confidentiality, Information flow property, Information theory, Process calculus, Refinement, Security

Thomas Santen

2008-02-01T23:59:59.000Z

231

Turbulent Channel Flows on a Rotating Earth  

Science Conference Proceedings (OSTI)

This paper deals with flow in a rectilinear channel on a rotating earth. The flow is directed perpendicular to the background planetary vorticity; both an analytical theory and numerical simulations are employed. The analytical approach assumes ...

Robert A. Handler; Richard P. Mied; Gloria J. Lindemann; Thomas E. Evans

2009-04-01T23:59:59.000Z

232

Information Flow in Ensemble Weather Predictions  

Science Conference Proceedings (OSTI)

In a weather prediction, information flows from the initial conditions to a later prediction. The uncertainty in the initial conditions implies that such a flow should be quantified with tools from probability theory. Using several recent ...

Richard Kleeman

2007-03-01T23:59:59.000Z

233

Turbulent Mixing in Stably Stratified Shear Flows  

Science Conference Proceedings (OSTI)

Vertical mixing of momentum and heat is investigated in turbulent stratified shear flows. It is assumed that the flow has uniform shear and stratification with homogeneous turbulence and that an equilibrium is reached between kinetic and ...

U. Schumann; T. Gerz

1995-01-01T23:59:59.000Z

234

Optical flow using phase information for deblurring  

E-Print Network (OSTI)

This thesis presents a method for reconstructing motion-degraded images by using velocity information generated with a phase-based optical flow calculation. The optical flow method applies a set of frequency-tuned Gabor ...

Texin, Cheryl (Cheryl A.)

2007-01-01T23:59:59.000Z

235

Apparatus for monitoring two-phase flow  

DOE Patents (OSTI)

A method and apparatus for monitoring two-phase flow is provided that is particularly related to the monitoring of transient two-phase (liquid-vapor) flow rates such as may occur during a pressurized water reactor core blow-down. The present invention essentially comprises the use of flanged wire screens or similar devices, such as perforated plates, to produce certain desirable effects in the flow regime for monitoring purposes. One desirable effect is a measurable and reproducible pressure drop across the screen. The pressure drop can be characterized for various known flow rates and then used to monitor nonhomogeneous flow regimes. Another useful effect of the use of screens or plates in nonhomogeneous flow is that such apparatus tends to create a uniformly dispersed flow regime in the immediate downstream vicinity. This is a desirable effect because it usually increases the accuracy of flow rate measurements determined by conventional methods.

Sheppard, John D. (Oak Ridge, TN); Tong, Long S. (Gaithersburg, MD)

1977-03-01T23:59:59.000Z

236

Stratified Tidal Flow over a Bump  

Science Conference Proceedings (OSTI)

The interaction of a stratified flow with an isolated topographic feature can introduce numerous disturbances into the flow, including turbulent wakes, internal waves, and eddies. Measurements made near a “bump” east of Race Rocks, Vancouver ...

Richard Dewey; David Richmond; Chris Garrett

2005-10-01T23:59:59.000Z

237

Large Scale Simulation of Particulate Flows  

Science Conference Proceedings (OSTI)

Simulations of particles in fluid flows are of great interest to numerous industries using sedimentation, fluidization, lubricated transport, and hydraulic fracturing of hydrocarbon reservoirs. Simulating incompressible viscoelastic flows with millions ...

Ahmed H. Sameh; Vivek Sarin

1999-04-01T23:59:59.000Z

238

A Simple Heat-Flow Quality Function And Appraisal Of Heat-Flow Measurements  

Open Energy Info (EERE)

Simple Heat-Flow Quality Function And Appraisal Of Heat-Flow Measurements Simple Heat-Flow Quality Function And Appraisal Of Heat-Flow Measurements And Heat-Flow Estimates From The Uk Geothermal Catalogue Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A Simple Heat-Flow Quality Function And Appraisal Of Heat-Flow Measurements And Heat-Flow Estimates From The Uk Geothermal Catalogue Details Activities (0) Areas (0) Regions (0) Abstract: A comprehensive database of temperature, heat flow, thermal conductivity and geochemistry is the basis of geothermal modelling. The latest revision (1987) of the UK Geothermal Catalogue (UKGC) contains over 2600 temperatures at over 1150 sites and over 200 observations of heat flow. About 93% of the temperature data are from depths less than 2000 m and about 50% are Bottom Hole Temperatures (BHT). Heat-flow density

239

NETL: Gasifipedia - Entrained Flow Gasifiers  

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

Entrained Flow Gasifiers Entrained Flow Gasifiers Uhde - Prenflo PRENFLO(tm) is a pressurized (>40 bar), entrained-flow gasification technology first demonstrated in the late 1980s, and currently offered by Uhde (Krupp Koppers merged with Uhde in 1997). Notably, PRENFLO(tm) is the gasification technology used at the world's largest solid feedstock-based gasifier at ELCOGAS's Puertollano IGCC plant in Spain (which is fueled with a 50%/50% mix of petcoke and coal). PRENFLO(tm) is offered in two varieties, the PRENFLO(tm) PSG (with steam generation) depicted in Figures 1 & 2, and PRENFLO(tm) PDQ (direct quench) as depicted in Figures 3 & 4. The gasifier conditions and feed characteristics are similar, but PRENFLO(tm) PSG includes an integrated waste heat boiler and uses compressed recirculated quench gas as illustrated in Figure 2, resulting in relatively low moisture raw syngas at relatively high exit temperature. PRENFLO(tm) PDQ uses direct quench, resulting in considerably lower raw syngas exit temperature (200-250°C) which is saturated. Uhde notes that PDQ has lower investment cost and shorter construction and supply schedule than PSG, though this would be at the performance expense of somewhat lower thermal efficiency and slightly higher concentration of CO2 in raw syngas.

240

Anisotropic collective flow of a Lorentz gas  

E-Print Network (OSTI)

Analytical results for the anisotropic collective flow of a Lorentz gas of massless particles scattering on fixed centres are presented.

Nicolas Borghini; Clement Gombeaud

2011-06-29T23:59:59.000Z

Note: This page contains sample records for the topic "accommodates two-way flows" 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

Toeplitz CAR flows and type I factorizations  

E-Print Network (OSTI)

Toeplitz CAR flows are a class of E_0-semigroups including the first type III example constructed by R. T. Powers. We show that the Toeplitz CAR flows contain uncountably many mutually non cocycle conjugate E_0-semigroups of type III. We also generalize the type III criterion for Toeplitz CAR flows employed by Powers (and later refined by W. Arveson), and show that Toeplitz CAR flows are always either of type I or type III.

Izumi, Masaki

2009-01-01T23:59:59.000Z

242

Multiphase Turbulent Flow Ken Kiger -UMCP  

E-Print Network (OSTI)

of the dispersion: · Size & geometry · Volume fraction #12;Bubbly Pipe Flow ­ heat exchangers in power plants, A/C units Gas-Liquid Flow #12;Aeration: -produced by wave action - used as reactor in chemical processing delivery Liquid-Gas Flow http://www.mywindpowersystem.com/2009/07/wind-power-when-nature

Gruner, Daniel S.

243

Hydromagnetic Instability in Differentially Rotating Flows  

E-Print Network (OSTI)

We study the stability of a compressible differentially rotating flows in the presence of the magnetic field, and we show that the compressibility profoundly alters the previous results for a magnetized incompressible flow. The necessary condition of newly found instability can be easily satisfied in various flows in laboratory and astrophysical conditions and reads $B_{s} B_{\\phi} \\Omega' \

Bonanno, A

2006-01-01T23:59:59.000Z

244

Pebble Flow Experiments For Pebble Bed Reactors  

E-Print Network (OSTI)

Pebble Flow Experiments For Pebble Bed Reactors Andrew C. Kadak1 Department of Nuclear Engineering of Technology 2nd International Topical Meeting on High Temperature Reactor Technology Institute of Nuclear in such a reactor would conform to granular flow theory which suggested rapid mixing as opposed to linear flow lines

Bazant, Martin Z.

245

Liquid cooled counter flow turbine bucket  

DOE Patents (OSTI)

Means and a method are provided whereby liquid coolant flows radially outward through coolant passages in a liquid cooled turbine bucket under the influence of centrifugal force while in contact with countercurrently flowing coolant vapor such that liquid is entrained in the flow of vapor resulting in an increase in the wetted cooling area of the individual passages.

Dakin, James T. (Schenectady, NY)

1982-09-21T23:59:59.000Z

246

Flow dynamics and solute transport in unsaturated rock fractures  

E-Print Network (OSTI)

and H. Brenner, Multiphase flow in porous media, Ann. Rev.to describe multiphase flow in porous media, involvingflow in porous media, can be generalized for multiphase flow

Su, G.W.

2011-01-01T23:59:59.000Z

247

Self-regulating flow control device  

DOE Patents (OSTI)

A variable, self-regulating valve having a hydraulic loss coefficient proportional to a positive exponential power of the flow rate. The device includes two objects in a flow channel and structure which assures that the distance between the two objects is an increasing function of the flow rate. The range of spacing between the objects is such that the hydraulic resistance of the valve is an increasing function of the distance between the two objects so that the desired hydraulic loss coefficient as a function of flow rate is obtained without variation in the flow area.

Humphreys, Duane A. (Pittsburgh, PA)

1984-01-01T23:59:59.000Z

248

Automated flow-temperature-humidity control system  

SciTech Connect

An automated system that controls air flow, temperature, and humidity was developed from a commercially available temperature-humidity indicator and a specially built flow-temperature-humidity control module. Parameters are set using direct-reading dials on the control module. The air flow is maintained using a mass-flow controller while process controllers connected to the indicator regulate humidity and temperature. The system will run indefinitely without need for operator intervention. If the module and indicator are calibrated properly, accurate air flows (+-2% of full scale), temperatures (+-0.3/sup 0/C), and humidities (+-2% RH) can be achieved.

Nelson, G.O.; Taylor, R.D.

1980-10-01T23:59:59.000Z

249

Chemical preconcentrator with integral thermal flow sensor  

DOE Patents (OSTI)

A chemical preconcentrator with integral thermal flow sensor can be used to accurately measure fluid flow rate in a microanalytical system. The thermal flow sensor can be operated in either constant temperature or constant power mode and variants thereof. The chemical preconcentrator with integral thermal flow sensor can be fabricated with the same MEMS technology as the rest of the microanlaytical system. Because of its low heat capacity, low-loss, and small size, the chemical preconcentrator with integral thermal flow sensor is fast and efficient enough to be used in battery-powered, portable microanalytical systems.

Manginell, Ronald P. (Albuquerque, NM); Frye-Mason, Gregory C. (Cedar Crest, NM)

2003-01-01T23:59:59.000Z

250

Liquid hydrogen flow problems in Kiwi reactors  

DOE Green Energy (OSTI)

The Kiwi series of reactors were the first ones tested in the US Rover Program in the development of nuclear rocket engines for space propulsion. The early experiments with liquid hydrogen showed that parallel flow systems were prone to uneven flow distributions and violent fluctuations in pressure and flow that were capable of destroying a reactor core. Kiwi flow distribution problems were solved by using multiple feed lines into the nozzle cooling system and carefully balancing impedance among them. The violent pressure and flow fluctuations were eliminated after their cause was identified as resonance phenomena driven by the response to flow disturbances of heat transfer through a superheated hydrogen layer. Smooth flow operations were assured by rapidly bringing operating pressures beyond several times the critical pressure of hydrogen. After this initial rough start, solid core nuclear rocket engines successfully passed milestones of achievements during the remainder of the Rover program.

Thurston, R.S.

1992-09-01T23:59:59.000Z

251

Momentum Transport in Granular Flows  

E-Print Network (OSTI)

We investigate the error induced by only considering binary collisions in the momentum transport of hard-sphere granular materials, as is done in kinetic theories. In this process, we first present a general microscopic derivation of the momentum transport equation and compare it to the kinetic theory derivation, which relies on the binary collision assumption. These two derivations yield different microscopic expressions for the stress tensor, which we compare using simulations. This provides a quantitative bound on the regime where binary collisions dominate momentum transport and reveals that most realistic granular flows occur in the region of phase space where the binary collision assumption does not apply.

Gregg Lois; Anael Lemaitre; Jean M. Carlson

2006-02-10T23:59:59.000Z

252

DECORRELATION TIMES OF PHOTOSPHERIC FIELDS AND FLOWS  

SciTech Connect

We use autocorrelation to investigate evolution in flow fields inferred by applying Fourier local correlation tracking (FLCT) to a sequence of high-resolution (0.''3), high-cadence ({approx_equal} 2 minute) line-of-sight magnetograms of NOAA active region (AR) 10930 recorded by the narrowband filter imager of the Solar Optical Telescope aboard the Hinode satellite over 2006 December 12 and 13. To baseline the timescales of flow evolution, we also autocorrelated the magnetograms, at several spatial binnings, to characterize the lifetimes of active region magnetic structures versus spatial scale. Autocorrelation of flow maps can be used to optimize tracking parameters, to understand tracking algorithms' susceptibility to noise, and to estimate flow lifetimes. Tracking parameters varied include: time interval {Delta}t between magnetogram pairs tracked, spatial binning applied to the magnetograms, and windowing parameter {sigma} used in FLCT. Flow structures vary over a range of spatial and temporal scales (including unresolved scales), so tracked flows represent a local average of the flow over a particular range of space and time. We define flow lifetime to be the flow decorrelation time, {tau}. For {Delta}t > {tau}, tracking results represent the average velocity over one or more flow lifetimes. We analyze lifetimes of flow components, divergences, and curls as functions of magnetic field strength and spatial scale. We find a significant trend of increasing lifetimes of flow components, divergences, and curls with field strength, consistent with Lorentz forces partially governing flows in the active photosphere, as well as strong trends of increasing flow lifetime and decreasing magnitudes with increases in both spatial scale and {Delta}t.

Welsch, B. T. [Space Sciences Laboratory, University of California, Berkeley, CA 94720-7450 (United States); Kusano, K.; Yamamoto, T. T. [Solar Terrestrial Environment Laboratory, Nagoya University Furo-cho, Chikusa-ku, Nagoya 464-8601 (Japan); Muglach, K. [Code 674, NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States)

2012-03-10T23:59:59.000Z

253

The Pandora Particle Flow Algorithm  

E-Print Network (OSTI)

A high-energy e+e- collider, such as the ILC or CLIC, is arguably the best option to complement and extend the LHC physics programme. A lepton collider will allow for exploration of Standard Model Physics, such as precise measurements of the Higgs, top and gauge sectors, in addition to enabling a multitude of New Physics searches. However, physics analyses at such a collider will place unprecedented demands on calorimetry, with a required jet energy resolution of \\sigma(E)/E energy resolution by fully reconstructing the paths of individual particles through the detector. The energies of charged particles can then be extracted from precise inner detector tracker measurements, whilst photon energies will be measured in the ECAL, and only neutral hadron energies (10% of jet energies) will be measured in the HCAL, largely avoiding the typically poor HCAL resolution. This document introduces the Pandora particle flow algorithms, which offer the current state of the art in particle flow calorimetry for the ILC and CLIC. The performance of the algorithms is investigated by examining the reconstructed jet energy resolution and the ability to separate the hadronic decays of W and Z bosons.

J. S. Marshall; M. A. Thomson

2013-08-21T23:59:59.000Z

254

DYNAMIC MODELING STRATEGY FOR FLOW REGIME TRANSITION IN GAS-LIQUID TWO-PHASE FLOWS  

SciTech Connect

In modeling gas-liquid two-phase flows, the concept of flow regime has been used to characterize the global interfacial structure of the flows. Nearly all constitutive relations that provide closures to the interfacial transfers in two-phase flow models, such as the two-fluid model, are often flow regime dependent. Currently, the determination of the flow regimes is primarily based on flow regime maps or transition criteria, which are developed for steady-state, fully-developed flows and widely applied in nuclear reactor system safety analysis codes, such as RELAP5. As two-phase flows are observed to be dynamic in nature (fully-developed two-phase flows generally do not exist in real applications), it is of importance to model the flow regime transition dynamically for more accurate predictions of two-phase flows. The present work aims to develop a dynamic modeling strategy for determining flow regimes in gas-liquid two-phase flows through the introduction of interfacial area transport equations (IATEs) within the framework of a two-fluid model. The IATE is a transport equation that models the interfacial area concentration by considering the creation and destruction of the interfacial area, such as the fluid particle (bubble or liquid droplet) disintegration, boiling and evaporation; and fluid particle coalescence and condensation, respectively. For the flow regimes beyond bubbly flows, a two-group IATE has been proposed, in which bubbles are divided into two groups based on their size and shape (which are correlated), namely small bubbles and large bubbles. A preliminary approach to dynamically identifying the flow regimes is provided, in which discriminators are based on the predicted information, such as the void fraction and interfacial area concentration of small bubble and large bubble groups. This method is expected to be applied to computer codes to improve their predictive capabilities of gas-liquid two-phase flows, in particular for the applications in which flow regime transition occurs.

X. Wang; X. Sun; H. Zhao

2011-09-01T23:59:59.000Z

255

Thin films flowing down inverted substrates: two dimensional flow  

E-Print Network (OSTI)

We consider free surface instabilities of films flowing on inverted substrates within the framework of lubrication approximation. We allow for the presence of fronts and related contact lines, and explore the role which they play in instability development. It is found that a contact line, modeled by a commonly used precursor film model, leads to free surface instabilities of convective type without any additional natural or excited perturbations. A single parameter D=(3Ca)^{1/3}cot\\alpha, where Ca is the capillary number and \\alpha is the inclination angle, is identified as a governing parameter in the problem. This parameter may be interpreted to reflect the combined effect of inclination angle, film thickness, Reynolds number and the fluid flux. Variation of D leads to change of the wave-like properties of the instabilities, allowing to observe traveling wave behavior, mixed waves, and the waves resembling solitary ones.

Lin, Te-sheng

2009-01-01T23:59:59.000Z

256

Advances in gas-liquid flows 1990  

SciTech Connect

Gas-liquid two-phase flows commonly occur in nature and industrial applications. Rain, clouds, geysers, and waterfalls are examples of natural gas-liquid flow phenomena, whereas industrial applications can be found in nuclear reactors, steam generators, boilers, condensers, evaporators, fuel atomization, heat pipes, electronic equipment cooling, petroleum engineering, chemical process engineering, and many others. The household-variety phenomena such as garden sprinklers, shower, whirlpool bath, dripping faucet, boiling tea pot, and bubbling beer provide daily experience of gas-liquid flows. The papers presented in this volume reflect the variety and richness of gas-liquid two-phase flow and the increasing role it plays in modern technology. This volume contains papers dealing with some recent development in gas-liquid flow science and technology, covering basic gas-liquid flows, measurements and instrumentation, cavitation and flashing flows, countercurrent flow and flooding, flow in various components and geometries liquid metals and thermocapillary effects, heat transfer, nonlinear phenomena, instability, and other special and general topics related to gas-liquid flows.

Kim, J.M. (Texas Univ., Austin, TX (United States). Nuclear Reactor Lab.); Rohatgi, U.S. (Brookhaven National Lab., Upton, NY (United States)); Hashemi, A. (Lockheed Missiles and Space Company (US))

1990-01-01T23:59:59.000Z

257

A constitutive law for dense granular flows  

E-Print Network (OSTI)

A continuum description of granular flows would be of considerable help in predicting natural geophysical hazards or in designing industrial processes. However, the constitutive equations for dry granular flows, which govern how the material moves under shear, are still a matter of debate. One difficulty is that grains can behave like a solid (in a sand pile), a liquid (when poured from a silo) or a gas (when strongly agitated). For the two extreme regimes, constitutive equations have been proposed based on kinetic theory for collisional rapid flows, and soil mechanics for slow plastic flows. However, the intermediate dense regime, where the granular material flows like a liquid, still lacks a unified view and has motivated many studies over the past decade. The main characteristics of granular liquids are: a yield criterion (a critical shear stress below which flow is not possible) and a complex dependence on shear rate when flowing. In this sense, granular matter shares similarities with classical visco-plastic fluids such as Bingham fluids. Here we propose a new constitutive relation for dense granular flows, inspired by this analogy and recent numerical and experimental work. We then test our three-dimensional (3D) model through experiments on granular flows on a pile between rough sidewalls, in which a complex 3D flow pattern develops. We show that, without any fitting parameter, the model gives quantitative predictions for the flow shape and velocity profiles. Our results support the idea that a simple visco-plastic approach can quantitatively capture granular flow properties, and could serve as a basic tool for modelling more complex flows in geophysical or industrial applications.

Pierre Jop; Yoël Forterre; Olivier Pouliquen

2006-12-05T23:59:59.000Z

258

Potential Flow Calculations of Axisymmetric Ducted Wind Turbines  

E-Print Network (OSTI)

An incompressible potential-flow vortex method has been constructed to analyze the flow field of a ducted

Widnall, Sheila

2009-09-02T23:59:59.000Z

259

NIST Pipeline-Scale Flow Measurement Standards for Natural ...  

Science Conference Proceedings (OSTI)

Pipeline-Scale Flow Measurement Standards for Natural Gas. Summary: NIST natural gas flow calibrations are performed ...

2013-01-28T23:59:59.000Z

260

Simulation of air flow in the typical boiler windbox segments  

Science Conference Proceedings (OSTI)

Simulation of turbulent air flow distribution in CFBC furnace, wherein primary air is entrained through inlet duct system called windbox, is attempted through state of art CAD/CFD softwares. Establishment of flow in windbox channel, distributed plate ... Keywords: CFBC boiler, air flow, combustor geometry, distributed plate nozzles, multi-block grids, recirculation flow, simulation of flow, unequal air flow, windbox channel

C. Bhasker

2002-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "accommodates two-way flows" 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

LLNL Energy Flow Charts | Open Energy Information  

Open Energy Info (EERE)

LLNL Energy Flow Charts LLNL Energy Flow Charts Jump to: navigation, search Tool Summary Name: LLNL Energy Flow Charts Agency/Company /Organization: Lawrence Livermore National Lab Sector: Energy Focus Area: Renewable Energy Topics: Pathways analysis References: LLNL Energy Flow Charts [1] Decision makers have long recognized the importance of visualizing energy and material flows in a way that distinguishes between resources, transformations and services. Research priorities can be defined in terms of changes to the flows, and the consequences of policy or technology shifts can be traced both upstream and downstream. The usefulness of this top-down view is limited by the level of detail that can be conveyed in a single image. We use two techniques to balance information content with readability. First we employe visualization

262

NETL: Gasifipedia - Entrained Flow Gasifiers  

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

Siemens Gasifier Siemens Gasifier (source: Siemens) Siemens Gasifiers Siemens gasification technology was originally developed by Deutsches Brennstoffinstitut (DBI) in Freiberg, Germany for the gasification of pulverized local brown coal and other solid feedstocks in 1975. The Noell group acquired the technology in 1991 and developed it further to handle liquid residues and wastes. The gasifier also operated under the name of Babcock Borsig and Future Energy before being acquired by Siemens in 2006. Operation The Siemens gasifier is a dry-feed, pressurized, entrained-flow reactor, which can be supplied with either a refractory lining for low ash feedstocks or with a cooling screen in the gasification section of the gasifier. The cooling screen consists of a gas-tight membrane wall

263

Phase-sensitive flow cytometer  

DOE Patents (OSTI)

This report describes phase-sensitive flow cytometer (FCM) which provides additional FCM capability to use the fluorescence lifetime of one or more fluorochromes bound to single cells to provide additional information regarding the cells. The resulting fluorescence emission can be resolved into individual fluorescence signals if two fluorochromes are present or can be converted directly to a decay lifetime from a single fluorochrome. The excitation light for the fluorochromes is modulated to produce an amplitude modulated fluorescence pulse as the fluorochrome is excited in the FCM. The modulation signal also forms a reference signal that is phase-shifted a selected amount for subsequent mixing with the output modulated fluorescence intensity signal in phase-sensitive detection circuitry. The output from the phase-sensitive circuitry is then an individual resolved fluorochrome signal or a single fluorochrome decay lifetime, depending on the applied phase shifts.

Steinkamp, J.A.

1992-12-31T23:59:59.000Z

264

Flow cytometer jet monitor system  

DOE Patents (OSTI)

A direct jet monitor illuminates the jet of a flow cytometer in a monitor wavelength band which is substantially separate from the substance wavelength band. When a laser is used to cause fluorescence of the substance, it may be appropriate to use an infrared source to illuminate the jet and thus optically monitor the conditions within the jet through a CCD camera or the like. This optical monitoring may be provided to some type of controller or feedback system which automatically changes either the horizontal location of the jet, the point at which droplet separation occurs, or some other condition within the jet in order to maintain optimum conditions. The direct jet monitor may be operated simultaneously with the substance property sensing and analysis system so that continuous monitoring may be achieved without interfering with the substance data gathering and may be configured so as to allow the front of the analysis or free fall area to be unobstructed during processing.

Van den Engh, Ger (Seattle, WA)

1997-01-01T23:59:59.000Z

265

Phase-sensitive flow cytometer  

DOE Patents (OSTI)

A phase-sensitive flow cytometer (FCM) provides additional FCM capability to use the fluorescence lifetime of one or more fluorochromes bound to single cells to provide additional information regarding the cells. The resulting fluorescence emission can be resolved into individual fluorescence signals if two fluorochromes are present or can be converted directly to a decay lifetime from a single fluorochrome. The excitation light for the fluorochromes is modulated to produce an amplitude modulated fluorescence pulse as the fluorochrome is excited in the FCM. The modulation signal also forms a reference signal that is phase-shifted a selected amount for subsequent mixing with the output modulated fluorescence intensity signal in phase-sensitive detection circuitry. The output from the phase-sensitive circuitry is then an individual resolved fluorochrome signal or a single fluorochrome decay lifetime, depending on the applied phase shifts. 15 figures.

Steinkamp, J.A.

1993-12-14T23:59:59.000Z

266

The gradient flow in a twisted box  

E-Print Network (OSTI)

We study the perturbative behavior of the gradient flow in a twisted box. We apply this information to define a running coupling using the energy density of the flow field. We study the step-scaling function and the size of cutoff effects in SU(2) pure gauge theory. We conclude that the twisted gradient flow running coupling scheme is a valid strategy for step-scaling purposes due to the relatively mild cutoff effects and high precision.

Ramos, A

2013-01-01T23:59:59.000Z

267

Impact of a Two-Way Coupling between an Atmospheric and an Ocean-Ice Model over the Gulf of St. Lawrence  

Science Conference Proceedings (OSTI)

The purpose of this study is to present the impacts of a fully interactive coupling between an atmospheric and a sea ice model over the Gulf of St. Lawrence, Canada. The impacts are assessed in terms of the atmospheric and sea ice forecasts ...

Pierre Pellerin; Harold Ritchie; François J. Saucier; François Roy; Serge Desjardins; Michel Valin; Vivian Lee

2004-06-01T23:59:59.000Z

268

Responses of Human-Habituated Wild Atlantic Spotted Dolphins to Play Behaviors Using a Two-Way Human/Dolphin Interface  

E-Print Network (OSTI)

were placed in locations (jars) anchored to the anchor line,but transparent plastic jars that were suspended in theneeded a human to open the jar. To communicate this, the

Herzing, Denise L.; Delfour, Fabienne; Pack, Adam A.

2012-01-01T23:59:59.000Z

269

Segregation of granular particles in suspension flow  

E-Print Network (OSTI)

An experiment was conducted to investigate the development of longitudinal stripes of granular particles due to instabilities in particle suspension flow. Research was conducted to characterize environmental phenomena ...

Tsay, Jessica, 1983-

2004-01-01T23:59:59.000Z

270

Geothermal: Sponsored by OSTI -- Geologic flow characterization...  

Office of Scientific and Technical Information (OSTI)

Geologic flow characterization using tracer techniques Geothermal Technologies Legacy Collection HelpFAQ | Site Map | Contact Us | Admin Log On HomeBasic Search About...

271

Flow-Through Electrode Capacitive Desalination  

LLNL has developed an innovative technology known as flow-through electrode capacitive desalination (FTE-CD) that promises to unlock an almost ...

272

NETL: News Release - Keeping Deepwater Pipelines Flowing  

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

remediation problem for offshore oil producers. Wax deposits can restrict the flow of crude oil and natural gas liquids, curtailing operations from offshore platforms that can...

273

Materials Sustainability: Digital Resource Center - Flow Studies ...  

Science Conference Proceedings (OSTI)

Jun 26, 2008 ... This 2004 circular presents the results of flow studies for recycling of 26 metal commodities, including chromium, magnesium, niobium, ...

274

Probabilistic computation of Poiseuille flow velocity fields  

Science Conference Proceedings (OSTI)

... pipe flux in the “analog” flow problem. ... the torsional rigidity and the cross sectional shape ... we note applications involving heat transfer through pipes ...

2013-07-10T23:59:59.000Z

275

Entrained Flow Gasification of Oil Sand Coke.  

E-Print Network (OSTI)

??The effect of blending woody biomass material with fluid coke and coal on the co-pyrolysis process was investigated in an entrained flow gasifier. The SEM… (more)

Vejahati, Farshid

2012-01-01T23:59:59.000Z

276

VALIDATING UNCERTAINTY ANALYSES FOR GAS FLOW ...  

Science Conference Proceedings (OSTI)

... tank volume to obtain the initial and final mass of gas in the tank ... during a crossover test, but laminar flow elements (LFE) and turbine flowmeters are ...

2012-11-03T23:59:59.000Z

277

Concerted Flows: Infrastructure for Terabits Data Networks |...  

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

Concerted Flows: Infrastructure for Terabits Data Networks High-performance application use of emerging 100G networks and future terabit networks will require substantial and...

278

Flow visualisation in inclined louvered fins  

Science Conference Proceedings (OSTI)

In this study the flow within an interrupted fin design, the inclined louvered fin, is investigated experimentally through visualisation. The inclined louvered fin is a hybrid of the offset strip fin and standard louvered fin, aimed at improved performance at low Reynolds numbers for compact heat exchangers. The flow behaviour is studied in six geometrically different configurations over a range of Reynolds numbers and quantified using the concept of 'fin angle alignment factor'. The transition from steady laminar to unsteady flow was studied in detail. The fin geometry had a very large impact on the transitional flow behaviour, especially on vortex shedding. (author)

T'Joen, C.; De Paepe, M. [Department of Flow, Heat and Combustion Mechanics, Ghent University-UGent, Sint-Pietersnieuwstraat 41, 9000 Gent (Belgium); Jacobi, A. [Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, 1206 West Green Street, Urbana, IL 61801 (United States)

2009-04-15T23:59:59.000Z

279

Flow, Li-Air, and Other Batteries  

Science Conference Proceedings (OSTI)

Oct 18, 2011 ... Large-scale energy storage technologies like redox flow batteries have been sought for renewable integration and smart grid applications.

280

Algebraic Characterizations of Flow-Network Typings  

E-Print Network (OSTI)

A flow network N is a capacited finite directed graph, with multiple input ports/arcs and multiple output ports/arcs. A flow f in N assigns a non-negative real number to every arc and is feasible if it satisfies flow conservation at every node and respects lower-bound/upper-bound capacities at every arc. We develop an algebraic theory of feasible flows in such networks with several beneficial consequences. We define algorithms to infer, from a given flow network N, an algebraic classification, which we call a typing for N, of all assignments f0 of values to the input and output arcs of N that can be extended to a feasible flow f. We then establish necessary and sufficient conditions on an arbitrary typing T guaranteeing that T is a valid typing for some flow network N. Based on these necessary and sufficient conditions, we define operations on typings that preserve their validity (to be typings for flow networks), and examine the implications for a typing theory of flow networks.

Assaf Kfoury

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "accommodates two-way flows" 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

Liquid flow through a reactive packed bed.  

E-Print Network (OSTI)

??The flow phenomena of liquid iron and slag in the lower zone of an iron making blast furnace influences the permeability of the coke bed,… (more)

George, Hazem Labib

2013-01-01T23:59:59.000Z

282

Flow Regimes and Transient Dynamics of Two-Dimensional Stratified Flow over an Isolated Mountain Ridge  

Science Conference Proceedings (OSTI)

Four regimes are identified for two-dimensional, unstructured, nonrotating, continuously stratified, hydrostatic, uniform Boussinesq flow over an isolated mountain ridge: (I) flow with neither wave breaking aloft nor upstream blocking (F?1.12, ...

Yuh-Lang Lin; Ting-An Wang

1996-01-01T23:59:59.000Z

283

DEVELOPMENT OF PLASTICITY MODEL USING NON ASSOCIATED FLOW RULE FOR HCP MATERIALS INCLUDING ZIRCONIUM FOR NUCLEAR APPLICATIONS  

SciTech Connect

In this report (prepared in collaboration with Prof. Jeong Whan Yoon, Deakin University, Melbourne, Australia) a research effort was made to develop a non associated flow rule for zirconium. Since Zr is a hexagonally close packed (hcp) material, it is impossible to describe its plastic response under arbitrary loading conditions with any associated flow rule (e.g. von Mises). As a result of strong tension compression asymmetry of the yield stress and anisotropy, zirconium displays plastic behavior that requires a more sophisticated approach. Consequently, a new general asymmetric yield function has been developed which accommodates mathematically the four directional anisotropies along 0 degrees, 45 degrees, 90 degrees, and biaxial, under tension and compression. Stress anisotropy has been completely decoupled from the r value by using non associated flow plasticity, where yield function and plastic potential have been treated separately to take care of stress and r value directionalities, respectively. This theoretical development has been verified using Zr alloys at room temperature as an example as these materials have very strong SD (Strength Differential) effect. The proposed yield function reasonably well models the evolution of yield surfaces for a zirconium clock rolled plate during in plane and through thickness compression. It has been found that this function can predict both tension and compression asymmetry mathematically without any numerical tolerance and shows the significant improvement compared to any reported functions. Finally, in the end of the report, a program of further research is outlined aimed at constructing tensorial relationships for the temperature and fluence dependent creep surfaces for Zr, Zircaloy 2, and Zircaloy 4.

Michael V. Glazoff; Jeong-Whan Yoon

2013-08-01T23:59:59.000Z

284

A Fast Network Flow Model is used in conjunction with Measurements of Filter Permeability to calculate the Performance of Hot Gas Filters  

SciTech Connect

Two different technologies that are being considered for generating electric power on a large scale by burning coal are Pressurized Fluid Bed Combustion (PFBC) systems and Integrated Gasification and Combined Cycle (IGCC) systems. Particulate emission regulations that have been proposed for future systems may require that these systems be fitted with large scale Hot Gas Clean-Up (HGCU) filtration systems that would remove the fine particulate matter from the hot gas streams that are generated by PFBC and IGCC systems. These hot gas filtration systems are geometrically and aerodynamically complex. They typically are constructed with large arrays of ceramic candle filter elements (CFE). The successful design of these systems require an accurate assessment of the rate at which mechanical energy of the gas flow is dissipated as it passes through the filter containment vessel and the individual candle filter elements that make up the system. Because the filtration medium is typically made of a porous ceramic material having open pore sizes that are much smaller than the dimensions of the containment vessel, the filtration medium is usually considered to be a permeable medium that follows Darcy's law. The permeability constant that is measured in the lab is considered to be a function of the filtration medium only and is usually assumed to apply equally to all the filters in the vessel as if the flow were divided evenly among all the filter elements. In general, the flow of gas through each individual CFE will depend not only on the geometrical characteristics of the filtration medium, but also on the local mean flows in the filter containment vessel that a particular filter element sees. The flow inside the CFE core, through the system manifolds, and inside the containment vessel itself will be coupled to the flow in the filter medium by various Reynolds number effects. For any given filter containment vessel, since the mean flows are different in different locations inside the vessel, the flow of gas through an individual CFE will adjust itself to accommodate the local mean flows that prevail in its general location. In some locations this adjustment will take place at High Reynolds numbers and in other locations this will occur at low Reynolds numbers. The analysis done here investigates the nature of this coupling.

VanOsdol, J.G.; Chiang, T-K.

2002-09-19T23:59:59.000Z

285

Prediction of flow pattern of gas-liquid flow through circular microchannel using probabilistic neural network  

Science Conference Proceedings (OSTI)

The present study attempts to develop a flow pattern indicator for gas-liquid flow in microchannel with the help of artificial neural network (ANN). Out of many neural networks present in literature, probabilistic neural network (PNN) has been chosen ... Keywords: Hydrodynamics, Microchannel, Microstructure, Multiphase flow, Probabilistic neural network, Transition boundary, Turbulence

Seim Timung; Tapas K. Mandal

2013-04-01T23:59:59.000Z

286

DevoFlow: scaling flow management for high-performance networks  

Science Conference Proceedings (OSTI)

OpenFlow is a great concept, but its original design imposes excessive overheads. It can simplify network and traffic management in enterprise and data center environments, because it enables flow-level control over Ethernet switching and provides global ... Keywords: data center, flow-based networking, switch design

Andrew R. Curtis; Jeffrey C. Mogul; Jean Tourrilhes; Praveen Yalagandula; Puneet Sharma; Sujata Banerjee

2011-08-01T23:59:59.000Z

287

Is the five-flow conjecture almost false?  

Science Conference Proceedings (OSTI)

The number of nowhere zero Z"Q flows on a graph G can be shown to be a polynomial in Q, defining the flow polynomial @F"G(Q). According to Tutte@?s five-flow conjecture, @F"G(5)>0 for any bridgeless G. A conjecture by Welsh that @F"G(Q) has no real roots ... Keywords: Flow polynomial, Flow roots, Nowhere zero flows, Petersen graph, Transfer matrix, Tutte's five-flow conjecture

Jesper Lykke Jacobsen, JesúS Salas

2013-07-01T23:59:59.000Z

288

MONOCULAR OPTICAL FLOW FOR REALTIME VISION SYSTEMS  

E-Print Network (OSTI)

MONOCULAR OPTICAL FLOW FOR REAL­TIME VISION SYSTEMS Stephen M. Benoit and Frank P. Ferrie TR­CIM­96 268510 FAX: (514) 398­7348 Email: cim@cim.mcgill.ca #12; MONOCULAR OPTICAL FLOW FOR REAL­TIME VISION

Dudek, Gregory

289

Passenger Flow Model for Airline Networks  

Science Conference Proceedings (OSTI)

We present a model that rapidly finds an approximation of the expected passenger flow on an airline network, given forecast data concerning (1) the distribution of the demand for each itinerary, seen as a random variable; (2) the time distribution of ... Keywords: airline transportation, equilibrium model, passenger flow, recapture, spill

Jonathan Dumas; François Soumis

2008-05-01T23:59:59.000Z

290

Flow and Plate Motion in Compressor Valves  

E-Print Network (OSTI)

Industry,... Mission: #12;15 Group Engineering Fluid Dynamics Rotating-flow machines ­ Centrifugal pumps Machines · pumps · wind turbines · compressors · propellers EFD-FLOW #12;17 Engineering Fluid Dynamics (HWA, visualisation) · ball-on-disc test rig · Starling Resistor ( lung tubes) · CFD-lab servers, PC

Twente, Universiteit

291

Fuel cell system with coolant flow reversal  

DOE Patents (OSTI)

Method and apparatus for cooling electrochemical fuel cell system components. Periodic reversal of the direction of flow of cooling fluid through a fuel cell stack provides greater uniformity and cell operational temperatures. Flow direction through a recirculating coolant fluid circuit is reversed through a two position valve, without requiring modulation of the pumping component.

Kothmann, Richard E. (Pittsburgh, PA)

1986-01-01T23:59:59.000Z

292

Kingsnorth PF Flow Meter Demonstration Trials  

Science Conference Proceedings (OSTI)

A three-month demonstration project at PowerGen's Kingsnorth Power Station tested several new pulverized fuel (PF) flow measurement technologies in the harsh environment of an operational power station. Although further development may be warranted, current on-line PF flow measurement technologies already meet the basic requirements of coal fired boiler operators.

1999-06-30T23:59:59.000Z

293

Structural analysis of network traffic flows  

Science Conference Proceedings (OSTI)

Network traffic arises from the superposition of Origin-Destination (OD) flows. Hence, a thorough understanding of OD flows is essential for modeling network traffic, and for addressing a wide variety of problems including traffic engineering, traffic ... Keywords: network traffic analysis, principal component analysis, traffic engineering

Anukool Lakhina; Konstantina Papagiannaki; Mark Crovella; Christophe Diot; Eric D. Kolaczyk; Nina Taft

2004-06-01T23:59:59.000Z

294

The Turbulence Structure of Nocturnal Slope Flow  

Science Conference Proceedings (OSTI)

Measurements of the turbulence structure of nocturnal slope flow are used to test the hypothesis that slope flow turbulence in the region above the low-level wind maximum is decoupled from the surface and has a local structure similar to that ...

T. W. Horst; J. C. Doran

1988-02-01T23:59:59.000Z

295

A PV View of Zonal Flow Vacillation  

Science Conference Proceedings (OSTI)

It is suggested here that the zonal flow vacillation of the Southern Hemisphere is caused by a mutual interaction between the barotropic shear of the zonal flow and the evolution of baroclinic eddies during the later stages of their lifecycle. An ...

Dennis L. Hartmann

1995-07-01T23:59:59.000Z

296

A compressible flow model with capillary effects  

Science Conference Proceedings (OSTI)

A quasi-conservative formulation for compressible flows with interfaces including both capillary and viscous effects is developed. The model involves: (i) acoustic and convective transport; (ii) surface tension effects introduced as an extension of the ... Keywords: break-up, coalescence, compressibility, conservative formulation, interface capturing, mixture thermodynamics, surface tension, two-phase flows, viscosity

Guillaume Perigaud; Richard Saurel

2005-10-01T23:59:59.000Z

297

Information-flow types for homomorphic encryptions  

Science Conference Proceedings (OSTI)

We develop a flexible information-flow type system for a range of encryption primitives, precisely reflecting their diverse functional and security features. Our rules enable encryption, blinding, homomorphic computation, and decryption, with selective ... Keywords: confidentiality, cryptography, integrity, non-interference, secure information flow, type systems

Cédric Fournet; Jérémy Planul; Tamara Rezk

2011-10-01T23:59:59.000Z

298

Explaining ML type errors by data flows  

Science Conference Proceedings (OSTI)

We present a novel approach to explaining ML type errors: Since the type system inhibits data flows that would abort the program at run-time, our type checker identifies as explanations those data flows that violate the typing rules. It also detects ...

Holger Gast

2004-09-01T23:59:59.000Z

299

Cross flow electrofilter and method  

DOE Patents (OSTI)

A filter for clarifying carbonaceous liquids containing finely divided solid particles of, for instance, unreacted coal, ash and other solids discharged from a coal liquefaction process is presented. The filter includes two passageways separated by a porous filter medium. In one preferred embodiment the filter medium is of tubular shape to form the first passageway and is enclosed within an outer housing to form the second passageway within the annulus. An electrode disposed in the first passageway, for instance along the tube axis, is connected to a source of high voltage for establishing an electric field between the electrode and the filter medium. Slurry feed flows through the first passageway tangentially to the surfaces of the filter medium and the electrode. Particles from the feed slurry are attracted to the electrode within the first passageway to prevent plugging of the porous filter medium while carbonaceous liquid filters into the second passageway for withdrawal. Concentrated slurry is discharged from the first passageway at an end opposite to the feed slurry inlet. Means are also provided for the addition of diluent and a surfactant into the slurry to control relative permittivity and the electrophoretic mobility of the particles.

Gidaspow, Dimitri (Northbrook, IL); Lee, Chang H. (Chicago, IL); Wasan, Darsh T. (Westmont, IL)

1981-01-01T23:59:59.000Z

300

California energy flow in 1992  

DOE Green Energy (OSTI)

For the past 16 years energy flow diagrams for the State of California have been prepared from available data by members of the Lawrence Livermore National Laboratory. They have proven to be useful tools in graphically expressing energy supply and use in the State as well as illustrating the difference between particular years and between the State and the US as a whole. As far as is possible, similar data sources have been used to prepare the diagrams from year to year and identical assumptions{sup la-le} concerning conversion efficiencies have been made in order to minimize inconsistencies in the data and analyses. Sources of data used in this report are given in Appendix B and C; unavoidably the sources used over the 1976--1993 period have varied as some data bases are no longer available. In addition, we continue to see differences in specific data reported by different agencies for a given year. In particular, reported data on supply and usage in industrial/commercial/residential end-use categories have shown variability amongst the data gathering agencies, which bars detailed comparisons from year to year. Nonetheless, taken overall, valid generalizations can be made concerning gross trends and changes.

Borg, I.Y.; Briggs, C.K.

1994-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "accommodates two-way flows" 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

Commodity Flow Survey | Data.gov  

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

Commodity Flow Survey Commodity Flow Survey BusinessUSA Data/Tools Apps Challenges Let's Talk BusinessUSA You are here Data.gov » Communities » BusinessUSA » Data Commodity Flow Survey Dataset Summary Description The Commodity Flow Survey provides information on commodities shipped, their value, weight, and mode of transportation, as well as the origin and destination of shipments of commodities from manufacturing, mining, wholesale, and selected retail and services establishments. It is undertaken through a partnership between the Bureau of the Census, U.S. Department of Commerce, and the Bureau of Transportation Statistics, Research and Innovative Technology Administration. Tags {cfc,commodity,flow," federal",state,local,transportation,facilities,services,energy,safety,environment,Mining,Manufacturing,Wholesale,trade,Retail,Services,auxiliary,establishments,warehouses,industries,export,shipment,distance,tons,weight,hazardous,miles,ton-miles,destination,industry,hazard,ship,intrastate,interstate,"UN number",packaging,"TIH number",u.s.,metropolitan}

302

Flow through electrode with automated calibration  

DOE Patents (OSTI)

The present invention is an improved automated flow through electrode liquid monitoring system. The automated system has a sample inlet to a sample pump, a sample outlet from the sample pump to at least one flow through electrode with a waste port. At least one computer controls the sample pump and records data from the at least one flow through electrode for a liquid sample. The improvement relies upon (a) at least one source of a calibration sample connected to (b) an injection valve connected to said sample outlet and connected to said source, said injection valve further connected to said at least one flow through electrode, wherein said injection valve is controlled by said computer to select between said liquid sample or said calibration sample. Advantages include improved accuracy because of more frequent calibrations, no additional labor for calibration, no need to remove the flow through electrode(s), and minimal interruption of sampling.

Szecsody, James E [Richland, WA; Williams, Mark D [Richland, WA; Vermeul, Vince R [Richland, WA

2002-08-20T23:59:59.000Z

303

Breakthrough Flow Battery Cell Stack: Transformative Electrochemical Flow Storage System (TEFSS)  

SciTech Connect

GRIDS Project: UTRC is developing a flow battery with a unique design that provides significantly more power than today's flow battery systems. A flow battery is a cross between a traditional battery and a fuel cell. Flow batteries store their energy in external tanks instead of inside the cell itself. Flow batteries have traditionally been expensive because the battery cell stack, where the chemical reaction takes place, is costly. In this project, UTRC is developing a new stack design that achieves 10 times higher power than today’s flow batteries. This high power output means the size of the cell stack can be smaller, reducing the amount of expensive materials that are needed. UTRC’s flow battery will reduce the cost of storing electricity for the electric grid, making widespread use feasible.

None

2010-09-09T23:59:59.000Z

304

Breakthrough Flow Battery Cell Stack: Transformative Electrochemical Flow Storage System (TEFSS)  

SciTech Connect

GRIDS Project: UTRC is developing a flow battery with a unique design that provides significantly more power than today's flow battery systems. A flow battery is a cross between a traditional battery and a fuel cell. Flow batteries store their energy in external tanks instead of inside the cell itself. Flow batteries have traditionally been expensive because the battery cell stack, where the chemical reaction takes place, is costly. In this project, UTRC is developing a new stack design that achieves 10 times higher power than today’s flow batteries. This high power output means the size of the cell stack can be smaller, reducing the amount of expensive materials that are needed. UTRC’s flow battery will reduce the cost of storing electricity for the electric grid, making widespread use feasible.

2010-09-09T23:59:59.000Z

305

California energy flow in 1989  

DOE Green Energy (OSTI)

California's energy use showed a modest increase (2.2%) in 1989 over 1988 which was in keeping with the steady increase in population that the state has experienced annually during the decade. All end-use sectors (residential, commercial, industrial, transportation, etc.) contributed to the growth. The larger demand was met by increased imports of all major fuels. Only electrical imports remained close to 1988 levels, in part due to increased output from Diablo Canyon nuclear plant whose performance exceeded expectations. California's per capita energy consumption has traditionally been below the national average due to the relatively benign climate associated with its centers of population. The largest single use for energy in the state was for transportation which overtook industrial usage in the 60's. Use of highway fuels continued to grow and reached all time highs in 1989. Highway congestion, a major problem and concern in the state, is anticipated to grow as the number of licensed drivers increases; in 1989 the increase was 3.4%. Output from the The Geysers Geothermal fields, the largest in the world, continued to falter as the steam output fell. Nonetheless new resources at the Coso Geothermal Resource Area and at the Wendel Geothermal field came on line during the year, and other geothermal areas were under active development. Novel sources of renewable energy (solar, wind, etc.) grew; however, collectively they made only a small contribution to the overall energy supply. Cogenerated electricity sold to the utilities by small power producers inexplicably fell in 1989 although estimates of the total capacity available rose. Energy flow diagrams illustrate energy sources and energy consumption.

Borg, I.Y.; Briggs, C.K.

1991-02-06T23:59:59.000Z

306

Thermal laminarization of a stratified pipe flow  

SciTech Connect

The present work constitutes a new program that grew out of a scoping assessment by ANL to determine the propensity for pipe stratification to occur in the reactor outlet nozzles and hot-leg piping of a generic LMFBR during events producing reverse pipe flow. This paper focuses on the role that thermal buoyancy plays relative to being able to laminarize a turbulent stratified shear zone in a horizontal pipe. The preceeding can influence the behavior of a pipe stratified-backflow-recirculation zone (cold plenum water down into the hot pipe flow) which developes as the result of a temperature difference between the pipe flow and the plenum.

Oras, J.J.; Kasza, K.E.

1984-01-01T23:59:59.000Z

307

Ionization based multi-directional flow sensor  

SciTech Connect

A method, system, and apparatus for conducting real-time monitoring of flow (airflow for example) in a system (a hybrid power generation system for example) is disclosed. The method, system and apparatus measure at least flow direction and velocity with minimal pressure drop and fast response. The apparatus comprises an ion source and a multi-directional collection device proximate the ion source. The ion source is configured to generate charged species (electrons and ions for example). The multi-directional collection source is configured to determine the direction and velocity of the flow in real-time.

Chorpening, Benjamin T. (Morgantown, WV); Casleton, Kent H. (Morgantown, WV)

2009-04-28T23:59:59.000Z

308

Multiphase Flow and Cavern Abandonment in Salt  

Science Conference Proceedings (OSTI)

This report will explore the hypothesis that an underground cavity in gassy salt will eventually be gas filled as is observed on a small scale in some naturally occurring salt inclusions. First, a summary is presented on what is known about gas occurrences, flow mechanisms, and cavern behavior after abandonment. Then, background information is synthesized into theory on how gas can fill a cavern and simultaneously displace cavern fluids into the surrounding salt. Lastly, two-phase (gas and brine) flow visualization experiments are presented that demonstrate some of the associated flow mechanisms and support the theory and hypothesis that a cavity in salt can become gas filled after plugging and abandonment

Ehgartner, Brian; Tidwell, Vince

2001-02-13T23:59:59.000Z

309

Energy flow in acoustic black holes  

SciTech Connect

We present the results of an analysis of superradiant energy flow due to scalar fields incident on an acoustic black hole. In addition to providing independent confirmation of the recent results in [E. Berti, V. Cardoso, and J. P. S. Lemos, Phys. Rev. D 70, 124006 (2004).], we determine in detail the profile of energy flow everywhere outside the horizon. We confirm explicitly that in a suitable frame the energy flow is inward at the horizon and outward at infinity, as expected on physical grounds.

Choy, K.; Kruk, T.; Carrington, M.E.; Fugleberg, T.; Zahn, J.; Kobes, R.; Kunstatter, G.; Pickering, D. [Department of Physics, Brandon University, Brandon, Manitoba, R7A 6A9 (Canada) and Winnipeg Institute for Theoretical Physics, Winnipeg, Manitoba (Canada); Department of Physics, University of Winnipeg, Winnipeg, Manitoba, R7A 6A9 (Canada) and Winnipeg Institute for Theoretical Physics, Winnipeg, Manitoba (Canada); Department of Mathematics, Brandon University, Brandon, Manitoba, R7A 6A9 (Canada)

2006-05-15T23:59:59.000Z

310

Hydromagnetic Instability in plane Couette Flow  

E-Print Network (OSTI)

We study the stability of a compressible magnetic plane Couette flow and show that compressibility profoundly alters the stability properties if the magnetic field has a component perpendicular to the direction of flow. The necessary condition of a newly found instability can be satisfied in a wide variety of flows in laboratory and astrophysical conditions. The instability can operate even in a very strong magnetic field which entirely suppresses other MHD instabilities. The growth time of this instability can be rather short and reach $\\sim 10$ shear timescales.

Bonanno, Alfio

2007-01-01T23:59:59.000Z

311

Geologic flow characterization using tracer techniques  

DOE Green Energy (OSTI)

A new tracer flow-test system has been developed for in situ characterization of geologic formations. This report describes two sets of test equipment: one portable and one for testing in deep formations. Equations are derived for in situ detector calibration, raw data reduction, and flow logging. Data analysis techniques are presented for computing porosity and permeability in unconfined isotropic media, and porosity, permeability and fracture characteristics in media with confined or unconfined two-dimensional flow. The effects of tracer pulse spreading due to divergence, dispersion, and porous formations are also included.

Klett, R. D.; Tyner, C. E.; Hertel, Jr., E. S.

1981-04-01T23:59:59.000Z

312

Multiphase Flow Analysis in Hydra-TH  

SciTech Connect

This talk presents an overview of the multiphase flow efforts with Hydra-TH. The presentation begins with a definition of the requirements and design principles for multiphase flow relevant to CASL-centric problems. A brief survey of existing codes and their solution algorithms is presented before turning the model formulation selected for Hydra-TH. The issues of hyperbolicity and wellposedness are outlined, and a three candidate solution algorithms are discussed. The development status of Hydra-TH for multiphase flow is then presented with a brief summary and discussion of future directions for this work.

Christon, Mark A. [Los Alamos National Laboratory; Bakosi, Jozsef [Los Alamos National Laboratory; Francois, Marianne M. [Los Alamos National Laboratory; Lowrie, Robert B. [Los Alamos National Laboratory; Nourgaliev, Robert [Idaho National Laboratory

2012-06-20T23:59:59.000Z

313

Large volume flow-through scintillating detector  

DOE Patents (OSTI)

A large volume flow through radiation detector for use in large air flow situations such as incinerator stacks or building air systems comprises a plurality of flat plates made of a scintillating material arranged parallel to the air flow. Each scintillating plate has a light guide attached which transfers light generated inside the scintillating plate to an associated photomultiplier tube. The output of the photomultiplier tubes are connected to electronics which can record any radiation and provide an alarm if appropriate for the application.

Gritzo, Russ E. (Los Alamos, NM); Fowler, Malcolm M. (Los Alamos, NM)

1995-01-01T23:59:59.000Z

314

Computational Fluid Dynamics Based Investigation of Sensitivity of Furnace Operational Conditions to Burner Flow Controls  

SciTech Connect

This is the Final Technical Report for DOE Cooperative Agreement No: DE-FC26-02NT41580. The goal of this project was to systematically assess the sensitivity of furnace operational conditions to burner air and fuel flows in coal fired utility boilers. The focus of this project was to quantify the potential impacts of ''fine level'' controls rather than that of ''coarse level'' controls (i.e. combustion tuning). Although it is well accepted that combustion tuning will generally improve efficiency and emissions of an ''out of tune'' boiler, it is not as well understood what benefits can be derived through active multiburner measurement and control systems in boiler that has coarse level controls. The approach used here was to utilize existing baseline furnace models that have been constructed using Reaction Engineering International's (REI) computational fluid dynamics (CFD) software. Using CFD analyses provides the ability to carry out a carefully controlled virtual experiment to characterize the sensitivity of NOx emissions, unburned carbon (UBC), furnace exit CO (FECO), furnace exit temperature (FEGT), and waterwall deposition to burner air and fuel flow rates. The Electric Power Research Institute (EPRI) provided co-funding for this program, and instrument and controls experts from EPRI's Instrument and Controls (I&C) Center have been active participants in this project. CFD simulations were completed for five coal fired boilers as planned: (1) 150 MW wall fired, (2) 500 MW opposed wall fired, (3) 600 MW T-Fired, (4) 330 MW cyclone-fired, and (5) 200 MW T-Fired Twin Furnace. In all cases, the unit selections were made in order to represent units that were descriptive of the utility industry as a whole. For each unit, between 25 and 44 furnace simulations were completed in order to evaluate impacts of burner to burner variations in: (1) coal and primary air flow rate, and (2) secondary air flow rate. The parametric matrices of cases that were completed were defined in order to accommodate sensitivity analyses of the results. The sensitivity analyses provide a strategy for quantifying the rate of change of NOx or unburned carbon in the fly ash to a rate of change in secondary air or fuel or stoichiometric ratio for individual burners or groups of burners in order to assess the value associated with individual burner flow control. In addition, the sensitivity coefficients that were produced provide a basis for quantifying the differences in sensitivities for the different boiler types. In a ranking of the sensitivity of NOx emissions to variations in secondary air flow between the burners at a fixed lower furnace stoichiometric ratio in order of least sensitive to most sensitive, the results were: (1) 600 MW T-Fired Unit; (2) 500 MW Opposed Wall-Fired Unit; (3) 150 MW Wall-Fired Unit; (4) 100 MW T-Fired Unit; and (5) 330 MW Cyclone-Fired Unit.

Marc Cremer; Dave Wang; Connie Senior; Andrew Chiodo; Steven Hardy; Paul Wolff

2005-07-01T23:59:59.000Z

315

Columbia University flow instability experimental program: Volume 3. Single tube parallel flow tests  

SciTech Connect

The coolant in the Savannah River Site (SRS) production nuclear reactor assemblies is circulated as a subcooled liquid under normal operating conditions. This coolant is evenly distributed throughout multiple annular flow channels with a uniform pressure profile across each coolant flow channel. During the postulated Loss of Coolant Accident (LOCA), which is initiated by a hypothetical guillotine pipe break, the coolant flow through the reactor assemblies is significantly reduced. The flow reduction and accompanying power reduction (after shutdown is initiated) occur in the first 1--2 seconds of the LOCA. This portion of the LOCA is referred to as the Flow Instability phase. A series of down flow experiments have been conducted on three different size single tubes. The objective of these experiments was to determine the effect of a parallel flow path on the occurrence of flow instability. In all cases, it has been shown that the point of flow instability (OFI) determined under controlled flow operation does not change when operating in a controlled pressure drop mode (parallel path operation).

Dougherty, T.; Maciuca, C.; McAssey, E.V. Jr.; Reddy, D.G.; Yang, B.W.

1990-06-01T23:59:59.000Z

316

The 8th International Symposium on Flow Visualization: Conference report  

Science Conference Proceedings (OSTI)

The 8th International Symposium on Flow Visualization (8ISFV) was held in Sorrento, Italy, from the 1st to the 4th of September 1998. The Symposium has attracted, by far, the largest number of participants in the history of the meeting. The 313 presented ... Keywords: acoustics, advanced techniques, aircrafts, airfoils, applications, bluff bodies, cavity flows, channel flows, combustion, delta wings, droplets break-up, electrodynamics, engines, flow around cylinders, flow visualization, fluidics, holography, industrial processes, infrared thermography, instability, interferometry, jets, jets in cross flow, liquid crystals, low reynolds number flows, machines, medical applications, multiphase flows, natural convection, numerical visualizations, particle image velocimetry, porous media, rotating fluids, schlieren, shock waves, supersonic flows, three dimensional flows, turbomachines, turbulence, two phase flows, unsteady flow, vortices

G. M. Carlomagno

1999-01-01T23:59:59.000Z

317

Residual Circulations Due to Bottom Roughness Variability under Tidal Flows  

Science Conference Proceedings (OSTI)

Tidal flows over irregular bathymetry are known to produce residual circulation flows due to nonlinear interaction with gradients of depth. Using the depth-averaged vorticity equations, the generation of residual vorticity and residual flows due ...

Thomas F. Gross; Francisco E. Werner

1994-07-01T23:59:59.000Z

318

Global Characteristics of Stream Flow Seasonality and Variability  

Science Conference Proceedings (OSTI)

Monthly stream flow series from 1345 sites around the world are used to characterize geographic differences in the seasonality and year-to-year variability of stream flow. Stream flow seasonality varies regionally, depending on the timing of ...

Michael D. Dettinger; Henry F. Diaz

2000-08-01T23:59:59.000Z

319

GMINC - A MESH GENERATOR FOR FLOW SIMULATIONS IN FRACTURED RESERVOIRS  

E-Print Network (OSTI)

Simulation of Fluid Flow in Fractured Porous Media, Watergovern fluid flow in fractured porous media. These are (i)for Modeling Fluid and Heat Flow in fractured Porous Media,

Pruess, K.

2010-01-01T23:59:59.000Z

320

Dryout droplet distribution and dispersed flow film boiling  

E-Print Network (OSTI)

Dispersed flow film boiling is characterized by liquid-phase droplets entrained in a continuous vapor-phase flow. In a previous work at MIT, a model of dispersed flow heat transfer was developed, called the Local Conditions ...

Hill, Wayne S.

1982-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "accommodates two-way flows" 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

Webinars on Planning for Smart Grid Panel Announced  

Science Conference Proceedings (OSTI)

... The Smart Grid incorporates digital computing and communications technology in the nation's electric power infrastructure, enabling two way flows ...

2011-10-03T23:59:59.000Z

322

Module Development and Simulation of the Variable Refrigerant Flow Air Conditioning System under Cooling Conditions in Energyplus  

E-Print Network (OSTI)

As a high-efficiency air conditioning scheme, the variable refrigerant flow (VRF) air-conditioning system is finding its way into medium-sized office buildings. Based on a generic dynamic building energy simulation environment, EnergyPlus, a new module is developed and the energy usage of the VRF system is investigated. This paper compares the energy consumption of the VRF system with that of two conventional air-conditioning systems, namely, the variable air volume (VAV) system and the fan-coil plus fresh air (FPFA) system. A generic office building is used to accommodate the different types of heating, ventilating, and air conditioning (HVAC) systems. Our objective is to examine the energy consumption of the VRF system applied to office buildings and make suggestions for evaluating and making decisions on HVAC systems in the early stages of building design. Simulation results show that the energy-saving potential of the VRF system is expected to achieve 22.2 percent and 11.7 percent, compared to the VAV system and the FPFA system, respectively. An energy-usage breakdown of electricity end-users in various systems is also presented.

Zhou, Y.; Wu, J.; Wang, R.; Shiochi, S.

2006-01-01T23:59:59.000Z

323

Tutorial on Increased Power Flow Guidebook  

Science Conference Proceedings (OSTI)

This project developed an annotated presentation of key material from the Increased Power Flow Guidebook that was published by EPRI in 2006. The presentation includes both power point and acrobat files on a CD accompanying the report.

2006-12-14T23:59:59.000Z

324

Self-potential modeling from primary flows  

DOE Green Energy (OSTI)

A new method for the calculation of self potentials (SP) based on induced current sources is presented. The induced current sources are due to divergences of the convective current which is driven, in turn, by a primary flow, either heat or fluid. Numerical modeling utilizing this method has been implemented using a two-dimensional transmission surface algorithm. When the primary flow is driven by the gradient of a potential, joint modeling of the primary flow and the resultant SP is possible with this algorithm. Examples of simple geometrical models in the presence of point sources for the primary flow are presented and discussed. Lastly, a field example of the joint modeling of temperature and SP data is illustrated with data from Red Hill Hot Spring, Utah.

Sill, W.R.

1981-03-01T23:59:59.000Z

325

Patterns and instability of grannular flow  

Science Conference Proceedings (OSTI)

Dense granular flows are often observed to become unstable and form inhomogeneous structures in nature or industry. Although recently significant advances have been made in understanding simple flows, instabilities are often not understood in detail. We present experimental and numerical results that show the formation of longitudinal stripes. These arise from instability of the uniform flowing state of granular media on a rough inclined plane. The form of the stripes depends critically on the mean density of the flow with a robust form of stripes at high density that consists of fast sliding plug-like regions (stripes) on top of highly agitated boiling material -- a configuration reminiscent of the Leidenfrost effect when a droplet of liquid lifted by its vapor is hovering above a hot surface.

Ecke, Robert E [Los Alamos National Laboratory; Borzsonyi, Tamas [NON LANL; Mcelwaine, Jim N [U. CAMBRIDGE

2009-01-01T23:59:59.000Z

326

Stochastic Forcing of Planetary Scale Flow  

Science Conference Proceedings (OSTI)

Using geopotential height observations we analyze the fluctuations of the barotropic vorticity transfer from synoptic scale flow (zonal wavenumber m > 5) to planetary scales (m ? 5). We hypothesize that this transfer can be seen as a stochastic ...

Joseph Egger; H-D. Schilling

1984-03-01T23:59:59.000Z

327

DOE Hydrogen Analysis Repository: FLOW Model  

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

FLOW Model FLOW Model Project Summary Full Title: Chemical Engineering Process Simulation Platform - FLOW Project ID: 131 Principal Investigator: Juan Ferrada Brief Description: FLOW is a steady-state chemical process simulator. Modules have been developed for supply chain calculations, micro-economic calculations, and other calculations. Purpose Simulate steady-state chemical processes to support hydrogen infrastructure and transition analysis. Performer Principal Investigator: Juan Ferrada Organization: Oak Ridge National Laboratory (ORNL) Address: Bethel Valley 1, Bldg 5700, N217 Oak Ridge, TN 37831-6166 Telephone: 865-574-4998 Email: ferradajj@ornl.gov Sponsor(s) Name: Fred Joseck Organization: DOE Hydrogen Program Telephone: 202-586-7932 Email: Fred.Joseck@ee.doe.gov

328

Feedback control of separation in unsteady flows  

E-Print Network (OSTI)

Prandtl (1904) showed that in a steady flow past a bluff body, streamlines separate from the boundary where the skin friction (or wall shear) vanishes and admits a negative gradient. Despite initial suggestions, however, ...

Alam, Mohammad-Reza

2005-01-01T23:59:59.000Z

329

Improved modeling techniques for turbomachinery flow fields  

DOE Green Energy (OSTI)

This program has the objective of developing an improved methodology for modeling turbomachinery flow fields, including the prediction of losses and efficiency. Specifically, the program addresses the treatment of the mixing stress tensor terms attributed to deterministic flow field mechanisms required in steady-state Computational Fluid Dynamic (CFD) models for turbomachinery flow fields. These mixing stress tensors arise due to spatial and temporal fluctuations (in an absolute frame of reference) caused by rotor-stator interaction due to various blade rows and by blade-to-blade variation of flow properties. This will be accomplished in a cooperative program by Penn State University and the Allison Engine Company. These tasks include the acquisition of previously unavailable experimental data in a high-speed turbomachinery environment, the use of advanced techniques to analyze the data, and the development of a methodology to treat the deterministic component of the mixing stress tenor.

Lakshminarayana, B.; Fagan, J.R. Jr.

1995-12-31T23:59:59.000Z

330

Catalyst immobilization techniques for continuous flow synthesis  

E-Print Network (OSTI)

Catalytic processes are ubiquitous in both research and industrial settings. As continuous flow processes continue to gain traction in research labs and fine and pharmaceutical chemical processes, new opportunities exist ...

Nagy, Kevin David

2012-01-01T23:59:59.000Z

331

Historical river flow rates for dose calculations  

Science Conference Proceedings (OSTI)

Annual average river flow rates are required input to the LADTAP Computer Code for calculating offsite doses from liquid releases of radioactive materials to the Savannah River. The source of information on annual river flow rates used in dose calculations varies, depending on whether calculations are for retrospective releases or prospective releases. Examples of these types of releases are: Retrospective - releases from routine operations (annual environmental reports) and short term release incidents that have occurred. Prospective - releases that might be expected in the future from routine or abnormal operation of existing or new facilities (EIS`s, EID`S, SAR`S, etc.). This memorandum provides historical flow rates at the downstream gauging station at Highway 301 for use in retrospective dose calculations and derives flow rate data for the Beaufort-Jasper and Port Wentworth water treatment plants.

Carlton, W.H.

1991-06-10T23:59:59.000Z

332

Pressure balanced drag turbine mass flow meter  

DOE Patents (OSTI)

The density of the fluid flowing through a tubular member may be measured by a device comprising a rotor assembly suspended within the tubular member, a fluid bearing medium for the rotor assembly shaft, independent fluid flow lines to each bearing chamber, and a scheme for detection of any difference between the upstream and downstream bearing fluid pressures. The rotor assembly reacts to fluid flow both by rotation and axial displacement; therefore concurrent measurements may be made of the velocity of blade rotation and also bearing pressure changes, where the pressure changes may be equated to the fluid momentum flux imparted to the rotor blades. From these parameters the flow velocity and density of the fluid may be deduced.

Dacus, Michael W. (Gilbert, AR); Cole, Jack H. (Fayetteville, AR)

1982-01-01T23:59:59.000Z

333

Pressure balanced drag turbine mass flow meter  

DOE Patents (OSTI)

The density of the fluid flowing through a tubular member may be measured by a device comprising a rotor assembly suspended within the tubular member, a fluid bearing medium for the rotor assembly shaft, independent fluid flow lines to each bearing chamber, and a scheme for detection of any difference between the upstream and downstream bearing fluid pressures. The rotor assembly reacts to fluid flow both by rotation and axial displacement; therefore concurrent measurements may be made of the velocity of blade rotation and also bearing pressure changes, where the pressure changes may be equated to the fluid momentum flux imparted to the rotor blades. From these parameters the flow velocity and density of the fluid may be deduced.

Dacus, M.W.; Cole, J.H.

1980-04-23T23:59:59.000Z

334

Verifying a secure information flow analyzer  

Science Conference Proceedings (OSTI)

Denotational semantics for a substantial fragment of Java is formalized by deep embedding in PVS, making extensive use of dependent types. A static analyzer for secure information flow for this language is proved correct, that is, it enforces noninterference.

David A. Naumann

2005-08-01T23:59:59.000Z

335

Development of the in vivo flow cytometer  

E-Print Network (OSTI)

An in vivo flow cytometer has been developed that allows the real-time detection and quantification of circulating cells containing fluorescent proteins or labeled with fluorochrome molecules in live animals, without the ...

Novak, John P. (John Peter), 1957-

2004-01-01T23:59:59.000Z

336

Local Energy Generation in Barotropic Flows  

Science Conference Proceedings (OSTI)

The local growth of disturbances to a steady, nondivergent shear flow is investigated in the context of the barotropic vorticity equation (BVE). A new expression for the instantaneous energy generation rate is derived by using a local coordinate ...

R. Iacono

2002-07-01T23:59:59.000Z

337

Instabilities in particle-laden flows  

E-Print Network (OSTI)

Particles are present in many industrial processes and in nature. Dry granular flows and suspensions have been well studied and present a broad range of problems in terms of rheology and instabilities. In both cases, new ...

Dupuy, Benjamin, 1981-

2004-01-01T23:59:59.000Z

338

Magnetic Amplifier for Power Flow Control  

Science Conference Proceedings (OSTI)

GENI Project: ORNL is developing an electromagnet-based, amplifier-like device that will allow for complete control over the flow of power within the electric grid. To date, complete control of power flow within the grid has been prohibitively expensive. ORNL’s controller could provide a reliable, cost-effective solution to this problem. The team is combining two types of pre-existing technologies to assist in flow control, culminating in a prototype iron-based magnetic amplifier. Ordinarily, such a device would require expensive superconductive wire, but the magnetic iron core of ORNL’s device could serve as a low-cost alternative that is equally adept at regulating power flow.

None

2012-02-24T23:59:59.000Z

339

Aqueous carrier waveguide in a flow cytometer  

DOE Patents (OSTI)

The liquid of a flow cytometer itself acts as an optical waveguide, thus transmitting the light to an optical filter/detector combination. This alternative apparatus and method for detecting scattered light in a flow cytometer is provided by a device which views and detects the light trapped within the optical waveguide formed by the flow stream. A fiber optic or other light collecting device is positioned within the flow stream. This provides enormous advantages over the standard light collection technique which uses a microscope objective. The signal-to-noise ratio is greatly increased over that for right-angle-scattered light collected by a microscope objective, and the alignment requirements are simplified.

Mariella, Jr., Raymond P. (Danville, CA); van den Engh, Gerrit (Seattle, WA); Northrup, M. Allen (Berkeley, CA)

1995-01-01T23:59:59.000Z

340

Pollutant Transport and Diffusion in Katabatic Flows  

Science Conference Proceedings (OSTI)

The characteristics of pollutant transport and diffusion of a passive contaminant in a two-dimensional katabatic flow over a simple slope are examined using a primitive equation hydrodynamic model. It is shown that pollutants released above the ...

Carmen J. Nappo; K. Shankar Rao; Jerold A. Herwehe

1989-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "accommodates two-way flows" 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

Chemistry Effects on Flow-Accelerated Corrosion  

Science Conference Proceedings (OSTI)

This report describes an investigation into the accuracy of the hydrazine and oxygen factors used for predicting flow-accelerated corrosion (FAC) in pressurized water reactors (PWRs) using the CHECWORKS Steam/Feedwater Application (SFA).

2005-11-07T23:59:59.000Z

342

Improving application security with data flow assertions  

E-Print Network (OSTI)

Resin is a new language runtime that helps prevent security vulnerabilities, by allowing programmers to specify application-level data flow assertions. Resin provides policy objects, which programmers use to specify assertion ...

Yip, Alexander

343

Continental Slope Flow Northeast of Taiwan  

Science Conference Proceedings (OSTI)

Hydrographic observations and current measurements with a Shipboard Acoustic Doppler Current Profiler over the continental shelf–slope junction northeast of Taiwan during 10–17 August 1994 allow the construction of the mesoscale flow pattern ...

T. Y. Tang; Y. Hsueh; Y. J. Yang; J. C. Ma

1999-06-01T23:59:59.000Z

344

Anelastic Semigeostrophic Flow over a Mountain Ridge  

Science Conference Proceedings (OSTI)

Scale analysis indicates that five nondimensional parameters (R02 ?, ? ? and k?) characterize the disturbance generated by the steady flow of a uniform wind (U0, V0) incident on a mountain ridge of width a in an isothermal, uniformly rotating, ...

Peter R. Bannon; Pe-Cheng Chu

1988-03-01T23:59:59.000Z

345

Magnetohydrodynamic Model Coupling Multiphase Flow in ...  

Science Conference Proceedings (OSTI)

Compact Filter Design for Gas Treatment Centers ... Gas-Solid Flow Applications for Powder Handling in Aluminum Smelters Processes ... Replacement of Damaged Electrical Insulators on Live Cross-Over Busbars inside a Tunnel: A ...

346

Smoothness monitors for compressible flow computation  

SciTech Connect

In [SY04, YS07] and references cited therein, the authors introduced the concept of employing multiresolution wavelet decomposition of computed flow data as smoothness monitors (flow sensors) to indicate the amount and location of built-in numerical dissipation that can be eliminated or further reduced in shock-capturing schemes. Studies indicated that this approach is able to limit the use of numerical dissipation with improved accuracy compared with standard shock-capturing methods. The studies in [SY04, YS07] were limited to low order multiresolution redundant wavelets with low level supports and low order vanishing moments. The objective of this paper is to expand the previous investigation to include higher order redundant wavelets with larger support and higher order vanishing moments for a wider spectrum of flow type and flow speed applications.

Sjogreen, B; Yee, H C

2008-09-02T23:59:59.000Z

347

Flow Properties in Rotating, Stratified Hydraulics  

Science Conference Proceedings (OSTI)

This paper discusses three distinct features of rotating, stratified hydraulics, using a reduced-gravity configuration. First, a new upstream condition is derived corresponding to a wide, almost motionless basin, and this is applied to flow ...

Peter D. Killworth

1992-09-01T23:59:59.000Z

348

Multiscale CFD simulations of entrained flow gasification  

E-Print Network (OSTI)

The design of entrained flow gasifiers and their operation has largely been an experience based enterprise. Most, if not all, industrial scale gasifiers were designed before it was practical to apply CFD models. Moreover, ...

Kumar, Mayank, Ph. D. Massachusetts Institute of Technology

2011-01-01T23:59:59.000Z

349

Free Flow 69 | Open Energy Information  

Open Energy Info (EERE)

Jump to: navigation, search Name Free Flow 69 Address Unit 9 Windmill Ind Est Windmill Place Fowey Zip PL23 1HB Sector Marine and Hydrokinetic Phone number 01726 833337 Website...

350

Wavenumber Transition in Baroclinically Unstable Flows  

Science Conference Proceedings (OSTI)

Using a two-layer model of unstable shear flow, the transition from one dominant baroclinic wave to another is studied. This transition can be smooth, involving an intermediate mixed wave state, or abrupt, thereby displaying hysteresis. It is ...

J. V. Mansbridge

1984-03-01T23:59:59.000Z

351

Summer Surface Flow Characteristics over Northeast Colorado  

Science Conference Proceedings (OSTI)

Surface wind data from the program for Regional Observing and Forecasting Services (PROFS) have been analyzed to investigate the diurnal wind flow pattern over the broad drainage are of the South Platte River in northeast Colorado. A consistent ...

James J. Toth; Richard H. Johnson

1985-09-01T23:59:59.000Z

352

Flow Garden : on paths of least resistance  

E-Print Network (OSTI)

Flow Garden is a proposal for a park architecture in which building becomes pathway. The project conceives of the building as an instrument within its larger urban context which has the capacity to strengthen and unify ...

Ynosencio, Lucille D. (Lucille Diane)

2009-01-01T23:59:59.000Z

353

The FLOWS Automatic Weather Station Network  

Science Conference Proceedings (OSTI)

This report describes in detail the FLOWS (FAA-Lincoln Laboratory Operational Weather Studies) automatic weather station network which is being used in the Terminal Doppler Weather Radar program to assess the radar detectability of wind shear and ...

Marilyn M. Wolfson

1989-04-01T23:59:59.000Z

354

Corner Flows in Free Liquid Films  

E-Print Network (OSTI)

A lubrication-flow model for a free film in a corner is presented. The model, written in the hyperbolic coordinate system ? = x² – y², η = 2xy, applies to films that are thin in the η direction. The lubrication approximation ...

Stocker, Roman

2004-08-24T23:59:59.000Z

355

Multiphase flow in fractured porous media  

Science Conference Proceedings (OSTI)

The major goal of this research project was to improve the understanding of the gas-oil two-phase flow in fractured porous media. In addition, miscible displacement was studied to evaluate its promise for enhanced recovery.

Firoozabadi, A.

1995-02-01T23:59:59.000Z

356

On Nonlinear Flow with Multiple Obstructions  

Science Conference Proceedings (OSTI)

Whereas long-wave theories have proved successful in describing, the nonlinear effects of single obstructions on narrow flows, the theories can fail when several obstructions are present. This failure is demonstrated using a simple laboratory ...

Lawrence J. Pratt

1984-04-01T23:59:59.000Z

357

Hierarchy of Mesoscale Flow Assumptions and Equations  

Science Conference Proceedings (OSTI)

The present research proposes a standard nomenclature for mesoscale meteorological concepts and integrates existing concepts of atmospheric space scales, flow assumptions, governing equations, and resulting motions into a hierarchy useful in ...

P. Thunis; R. Bornstein

1996-02-01T23:59:59.000Z

358

Continuous Flow Multi-Step Organic Synthesis  

E-Print Network (OSTI)

Using continuous flow techniques for multi-step synthesis enables multiple reaction steps to be combined into a single continuous operation. In this mini-review we discuss the current state of the art in this field and ...

Webb, Damien

359

Computer-Aided Light Sheet Flow Visualization  

Science Conference Proceedings (OSTI)

A computer-aided flow visualization process has been developed to analyze video images acquired from rotating and translating light sheet visualization systems.The computer process integrates a mathematical model for image reconstruction, advanced computer ...

Stacy Kathryn; Severance Kurt; Childers Brooks A.

1993-07-01T23:59:59.000Z

360

Vortex-Driven Sensitivity in Deformation Flow  

Science Conference Proceedings (OSTI)

A sensitivity mechanism for the interaction of two vortices in a two-dimensional deformation background flow is explored. A nonlinear model describing the vortex interaction up to a critical merging distance is developed. This model shows that in ...

Zhiyuan Liu; Paul J. Roebber

2008-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "accommodates two-way flows" 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

Scaled Experimental Modeling of VHTR Plenum Flows  

DOE Green Energy (OSTI)

Abstract The Very High Temperature Reactor (VHTR) is the leading candidate for the Next Generation Nuclear Power (NGNP) Project in the U.S. which has the goal of demonstrating the production of emissions free electricity and hydrogen by 2015. Various scaled heated gas and water flow facilities were investigated for modeling VHTR upper and lower plenum flows during the decay heat portion of a pressurized conduction-cooldown scenario and for modeling thermal mixing and stratification (“thermal striping”) in the lower plenum during normal operation. It was concluded, based on phenomena scaling and instrumentation and other practical considerations, that a heated water flow scale model facility is preferable to a heated gas flow facility and to unheated facilities which use fluids with ranges of density to simulate the density effect of heating. For a heated water flow lower plenum model, both the Richardson numbers and Reynolds numbers may be approximately matched for conduction-cooldown natural circulation conditions. Thermal mixing during normal operation may be simulated but at lower, but still fully turbulent, Reynolds numbers than in the prototype. Natural circulation flows in the upper plenum may also be simulated in a separate heated water flow facility that uses the same plumbing as the lower plenum model. However, Reynolds number scaling distortions will occur at matching Richardson numbers due primarily to the necessity of using a reduced number of channels connected to the plenum than in the prototype (which has approximately 11,000 core channels connected to the upper plenum) in an otherwise geometrically scaled model. Experiments conducted in either or both facilities will meet the objectives of providing benchmark data for the validation of codes proposed for NGNP designs and safety studies, as well as providing a better understanding of the complex flow phenomena in the plenums.

ICONE 15

2007-04-01T23:59:59.000Z

362

Plasma flow switch experiment on Procyon  

SciTech Connect

This report presents the results obtained from a series of plasma flow switch experiments done on the Procyon explosive pulse power generator. These experiments involved switching into a fixed inductance dummy load and also into a dynamic implosion load. The results indicated that the switch did fairly well at switching current into the load, but the results for the implosion are more ambiguous. The results are compared to calculations and the implications for future plasma flow switch work are discussed.

Benage, J.F. Jr.; Bowers, R.; Peterson, D. [and others

1995-09-01T23:59:59.000Z

363

Valve for controlling flow of cryogenic fluid  

DOE Patents (OSTI)

A valve is provided for accurately controlling the flow of cryogenic fluids such as liquid nitrogen. The valve comprises a combination of disc and needle valves affixed to a valve stem in such a manner that the disc and needle are free to rotate about the stem, but are constrained in lateral and vertical movements. This arrangement provides accurate and precise fluid flow control and positive fluid isolation.

Knapp, P.A.

1995-12-31T23:59:59.000Z

364

EPRI Increased Power Flow Guidebook -- 2011  

Science Conference Proceedings (OSTI)

The EPRI Increased Power Flow (IPF) Guidebook is a state-of-the-art and best-practices reference and guidebook on increasing the power flow capacities of existing overhead transmission lines, underground cables, power transformers, and substation equipment without compromising safety and reliability. The Guidebook discusses power system concerns and limiting conditions to increasing capacity, reviews available technology options and methods, illustrates the alternatives with case studies, and analyzes th...

2011-12-12T23:59:59.000Z

365

Nuclear Feedwater Flow Measurement Applications Guide  

Science Conference Proceedings (OSTI)

This report is a summary of the technologies available to measure the feedwater mass flow rate in nuclear power plants. Differential pressure meters, three types of ultrasonic flow meters (UFMs) (external transit time, chordal transit time, and cross-correlation), and tracer tests are discussed. For each technology, the report describes operating principles, installation, maintenance requirements, measurement errors, uncertainties, and the results of an industry survey.

1999-07-30T23:59:59.000Z

366

Spark gap switch with spiral gas flow  

DOE Patents (OSTI)

A spark gap switch having a contaminate removal system using an injected gas. An annular plate concentric with an electrode of the switch defines flow paths for the injected gas which form a strong spiral flow of the gas in the housing which is effective to remove contaminates from the switch surfaces. The gas along with the contaminates is exhausted from the housing through one of the ends of the switch.

Brucker, J.P.

1988-03-23T23:59:59.000Z

367

An Interactive Nesting Algorithm for Stretched Grids and Variable Nesting Ratios  

Science Conference Proceedings (OSTI)

An existing two-way interactive grid-nesting technique is generalized to accommodate stretched grids and a spatially variable grid-nesting ratio. The new scheme applies the same reversibility constraint and possesses the same scalar and momentum ...

Robert L. Walko; Craig J. Tremback; Roger A. Pielke; William R. Cotton

1995-04-01T23:59:59.000Z

368

A stochastic flow rule for granular materials  

E-Print Network (OSTI)

There have been many attempts to derive continuum models for dense granular flow, but a general theory is still lacking. Here, we start with Mohr-Coulomb plasticity for quasi-2D granular materials to calculate (average) stresses and slip planes, but we propose a "stochastic flow rule" (SFR) to replace the principle of coaxiality in classical plasticity. The SFR takes into account two crucial features of granular materials - discreteness and randomness - via diffusing "spots" of local fluidization, which act as carriers of plasticity. We postulate that spots perform random walks biased along slip-lines with a drift direction determined by the stress imbalance upon a local switch from static to dynamic friction. In the continuum limit (based on a Fokker-Planck equation for the spot concentration), this simple model is able to predict a variety of granular flow profiles in flat-bottom silos, annular Couette cells, flowing heaps, and plate-dragging experiments -- with essentially no fitting parameters -- although it is only expected to function where material is at incipient failure and slip-lines are inadmissible. For special cases of admissible slip-lines, such as plate dragging under a heavy load or flow down an inclined plane, we postulate a transition to rate-dependent Bagnold rheology, where flow occurs by sliding shear planes. With different yield criteria, the SFR provides a general framework for multiscale modeling of plasticity in amorphous materials, cycling between continuum limit-state stress calculations, meso-scale spot random walks, and microscopic particle relaxation.

Ken Kamrin; Martin Z. Bazant

2006-09-19T23:59:59.000Z

369

Direct Detection of Dark Matter Debris Flows  

E-Print Network (OSTI)

Tidal stripping of dark matter from subhalos falling into the Milky Way produces narrow, cold tidal streams as well as more spatially extended "debris flows" in the form of shells, sheets, and plumes. Here we focus on the debris flow in the Via Lactea II simulation, and show that this incompletely phase-mixed material exhibits distinctive high velocity behavior. Unlike tidal streams, which may not necessarily intersect the Earth's location, debris flow is spatially uniform at 8 kpc and thus guaranteed to be present in the dark matter flux incident on direct detection experiments. At Earth-frame speeds greater than 450 km/s, debris flow comprises more than half of the dark matter at the Sun's location, and up to 80% at even higher speeds. Therefore, debris flow is most important for experiments that are particularly sensitive to the high speed tail of the dark matter distribution, such as searches for light or inelastic dark matter or experiments with directional sensitivity. We show that debris flow yields a distinctive recoil energy spectrum and a broadening of the distribution of incidence direction.

Michael Kuhlen; Mariangela Lisanti; David N. Spergel

2012-01-31T23:59:59.000Z

370

Data flow machine for data driven computing  

DOE Patents (OSTI)

A data flow computer and method of computing is disclosed which utilizes a data driven processor node architecture. The apparatus in a preferred embodiment includes a plurality of First-In-First-Out (FIFO) registers, a plurality of related data flow memories, and a processor. The processor makes the necessary calculations and includes a control unit to generate signals to enable the appropriate FIFO register receiving the result. In a particular embodiment, there are three FIFO registers per node: an input FIFO register to receive input information from an outside source and provide it to the data flow memories; an output FIFO register to provide output information from the processor to an outside recipient; and an internal FIFO register to provide information from the processor back to the data flow memories. The data flow memories are comprised of four commonly addressed memories. A parameter memory holds the A and B parameters used in the calculations; an opcode memory holds the instruction; a target memory holds the output address; and a tag memory contains status bits for each parameter. One status bit indicates whether the corresponding parameter is in the parameter memory and one status bit to indicate whether the stored information in the corresponding data parameter is to be reused. The tag memory outputs a ''fire'' signal (signal R VALID) when all of the necessary information has been stored in the data flow memories, and thus when the instruction is ready to be fired to the processor. 11 figs.

Davidson, G.S.; Grafe, V.G.

1988-07-22T23:59:59.000Z

371

Heat-flow studies in Wyoming, 1979 to 1981  

DOE Green Energy (OSTI)

Thirty heat flow values completed during May 1981 for Wyoming are tabulated and updated maps of heat flow in Wyoming and adjacent areas are presented.

Decker, E.R.; Heasler, H.P.; Buelow, K.L.

1981-12-01T23:59:59.000Z

372

Method and apparatus for measuring flow velocity using matched filters  

DOE Patents (OSTI)

An apparatus and method for measuring the flow velocities of individual phase flow components of a multiphase flow is disclosed. Signals arising from flow noise disturbance are extracted from the flow, at upstream and downstream locations. The signals are processed through pairs of matched filters which are matched to the flow disturbance frequency characteristics of the phase flow component to be measured. The processed signals are then cross-correlated to determine the transit delay time of the phase flow component between sensing positions.

Raptis, A.C.

1981-07-17T23:59:59.000Z

373

Gates/filters in Flow Cytometry Data Visualization  

E-Print Network (OSTI)

The flowViz package provides tools for visualization of flow cytometry data. This document describes the support for visualizing gates (a.k.a. filters). 1

unknown authors

2010-01-01T23:59:59.000Z

374

Gates/filters in Flow Cytometry Data Visualization  

E-Print Network (OSTI)

The flowViz package provides tools for visualization of flow cytometry data. This document describes the support for visualizing gates (a.k.a. filters). 1

unknown authors

2012-01-01T23:59:59.000Z

375

Heat Flow, Heat Transfer And Lithosphere Rheology In Geothermal...  

Open Energy Info (EERE)

Flow, Heat Transfer And Lithosphere Rheology In Geothermal Areas- Features And Examples Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Heat Flow,...

376

ESS 2012 Peer Review - Flow Battery Modeling - Soowhan Kim, PNNL  

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

Pacific Northwest National Laboratory, vilayanur.viswanathan@pnnl.gov Flow Battery Modeling (a) (b) Developed shunt and flow models were used to successfully develop a...

377

Flow Test At Colrado Area (DOE GTP) | Open Energy Information  

Open Energy Info (EERE)

Flow Test At Colrado Area (DOE GTP) Exploration Activity Details Location Colado Geothermal Area Exploration Technique Flow Test Activity Date Usefulness not indicated DOE-funding...

378

Electricity tends to flow south in North America - Today in ...  

U.S. Energy Information Administration (EIA)

The map above shows that electricity tends to flow south in North America. The numbers on the map reflect average net power flows—metered ...

379

Flow-History-Dependent Behavior in Entangled Polymer Melt Flow with Multiscale Simulation  

E-Print Network (OSTI)

Polymer melts represent the flow-history-dependent behavior. To clearly show this behavior, we have investigated flow behavior of an entangled polymer melt around two cylinders placed in tandem along the flow direction in a two dimensional periodic system. In this system, the polymer states around a cylinder in downstream side are different from the ones around another cylinder in upstream side because the former ones have a memory of a strain experienced when passing around the cylinder in upstream side but the latter ones do not have the memory. Therefore, the shear stress distributions around two cylinders are found to be different from each other. Moreover, we have found that the averaged flow velocity decreases accordingly with increasing the distance between two cylinders while the applied external force is constant. While this behavior is consistent with that of the Newtonian fluid, the flow-history-dependent behavior enhances the reduction of the flow resistance.

Takahiro Murashima; Takashi Taniguchi

2011-10-05T23:59:59.000Z

380

Coupled modeling of non-isothermal multiphase flow, solutetransport and reactive chemistry in porous and fractured media: 1. ModelDevelopment and Validation  

Science Conference Proceedings (OSTI)

Coupled modeling of subsurface multiphase fluid and heat flow, solute transport and chemical reactions can be used for the assessment of acid mine drainage remediation, mineral deposition, waste disposal sites, hydrothermal convection, contaminant transport, and groundwater quality. Here they present a numerical simulation model, TOUGHREACT, which considers non-isothermal multi-component chemical transport in both liquid and gas phases. A wide range of subsurface thermo-physical-chemical processes is considered. The model can be applied to one-, two- or three-dimensional porous and fractured media with physical and chemical heterogeneity. The model can accommodate any number of chemical species present in liquid, gas and solid phases. A variety of equilibrium chemical reactions is considered, such as aqueous complexation, gas dissolution/exsolution, cation exchange, and surface complexation. Mineral dissolution/precipitation can proceed either subject to local equilibrium or kinetic conditions. The coupled model employs a sequential iteration approach with reasonable computing efficiency. The development of the governing equations and numerical approach is presented along with the discussion of the model implementation and capabilities. The model is verified for a wide range of subsurface physical and chemical processes. The model is well suited for flow and reactive transport in variably saturated porous and fractured media. In the second of this two-part paper, three applications covering a variety of problems are presented to illustrate the capabilities of the model.

Xu, Tianfu; Pruess, Karsten

1998-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "accommodates two-way flows" 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

Evaluation of uncertainties due to hydrogeological modeling and groundwater flow analysis: Steady flow, transient flow, and thermal studies  

SciTech Connect

Starting with regional geographic, geologic, surface and subsurface hydrologic, and geophysical data for the Tono area in Gifu, Japan, we develop an effective continuum model to simulate subsurface flow and transport in a 4 km by 6 km by 3 km thick fractured granite rock mass overlain by sedimentary layers. Individual fractures are not modeled explicitly. Rather, continuum permeability and porosity distributions are assigned stochastically, based on well-test data and fracture density measurements. Lithologic layering and one major fault, the Tsukiyoshi Fault, are assigned deterministically. We conduct three different studies: (1) the so-called base case, in which the model simulates the steady-state groundwater flow through the site, and then stream trace analysis is used to calculate travel times to the model boundary from specified release points; (2) simulations of transient flow during long term pump tests (LTPT) using the base-case model; and (3) thermal studies in which coupled heat flow and fluid flow are modeled, to examine the effects of the geothermal gradient on groundwater flow. The base-case study indicates that the choice of open or closed lateral boundaries has a strong influence on the regional groundwater flow patterns produced by the models, but no field data exist that can be used to determine which boundary conditions are more realistic. The LTPT study cannot be used to distinguish between the alternative boundary conditions, because the pumping rate is too small to produce an analyzable pressure response at the model boundaries. In contrast, the thermal study shows that the temperature distributions produced by the open and closed models differ greatly. Comparison with borehole temperature data may be used to eliminate the closed model from further consideration.

Doughty, Christine; Karasaki, Kenzi

2002-12-11T23:59:59.000Z

382

Pore-scale modeling of the impact of surrounding flow behavior on multiphase flow properties.  

E-Print Network (OSTI)

??Accurate predictions of macroscopic multiphase flow properties, such as relative permeability and capillary pressure, are necessary for making key decisions in reservoir engineering. These properties… (more)

Petersen, Robert Thomas

2010-01-01T23:59:59.000Z

383

Importance of considering intraborehole flow in solute transport modeling under highly dynamic flow conditions  

SciTech Connect

Correct interpretation of tracer test data is critical for understanding transport processes in the subsurface. This task can be greatly complicated by the presence of intraborehole flows in a highly dynamic flow environment. At a new tracer test site (Hanford IFRC) a dynamic flow field created by changes in the stage of the adjacent Columbia River, coupled with a heterogeneous hydraulic conductivity distribution, leads to considerable variations in vertical hydraulic gradients. These variations, in turn, create intraborehole flows in fully-screened (6.5 m) observation wells with frequently alternating upward and downward movement. This phenomenon, in conjunction with a highly permeable aquifer formation and small horizontal hydraulic gradients, makes modeling analysis and model calibration a formidable challenge. Groundwater head data alone were insufficient to define the flow model boundary conditions, and the movement of the tracer was highly sensitive to the dynamics of the flow field. This study shows that model calibration can be significantly improved by explicitly considering (a) dynamic flow model boundary conditions and (b) intraborehole flow. The findings from this study underscore the difficulties in interpreting tracer tests and understanding solute transport under highly dynamic flow conditions.

Ma, Rui; Zheng, Chunmiao; Tonkin, Matthew J.; Zachara, John M.

2011-04-01T23:59:59.000Z

384

Study the power flow control of a power system with unified power flow controller.  

E-Print Network (OSTI)

??Electrical power systems is a large interconnected network that requires a careful design to maintain the system with continuous power flow operation without any limitations.… (more)

Peesari, Vakula

2010-01-01T23:59:59.000Z

385

Investigations On Flow And Flow-Induced Vibration Of Candu Fuel Bundles.  

E-Print Network (OSTI)

??Excitations induced by three-dimensional unsteady flows of ordinary water coolant through a string of CANDU fuel bundles in a fuel channel are investigated in this… (more)

Bhattacharya, Alokendu

2013-01-01T23:59:59.000Z

386

Characterization of Foam Flow in Pipes Using Two Flow Regime Concept.  

E-Print Network (OSTI)

??The objective of this study is to investigate the characteristics of foam flow behavior in pipes in a wide range of experimental conditions, including two… (more)

Gajbhiye, Rahul Narayanrao

2011-01-01T23:59:59.000Z

387

Efficient Production Optimization Using Flow Network Models  

E-Print Network (OSTI)

Reservoir simulation is an important tool for decision making and field development management. It enables reservoir engineers to predict reservoir production performance, update an existing model to reproduce monitoring data, assess alternative field development scenarios and design robust production optimization strategies by taking into account the existing uncertainties. A big obstacle in automating model calibration and production optimization approaches is the massive computation required to predict the response of real reservoirs under proposed changes in the model inputs. To speed up reservoir response predictions without compromising accuracy, fast surrogate models have been proposed. These models are either derived by preserving the physics of the involved processes (e.g. mass balance equations) to provide reliable long-range predictions or are developed based solely on statistical relations, in which case they can only provide short-range predictions due to the absence of the physical processes that govern the long-term behavior of the reservoir. We present an alternative solution that combines the advantages of both statistics-based and physics-based methods by deriving the flow predictions in complex two-dimensional models from one-dimensional flow network models. The existing injection/production wells in the original model form the nodes or vertices of the flow network. Each pair of wells (nodes) in the flow network is connected using a one-dimensional numerical simulation model; hence, the entire reservoir is reduced to a connected network of one-dimensional simulation models where the coupling between the individual one-dimensional models is enforced at the nodes where network edges intersect. The proposed flow network model provides a useful and fast tool for characterizing inter-well connectivity, estimating drainage volume between each pair of wells, and predicting reservoir production over an extended period of time for optimization purposes. We estimate the parameters of the flow network model using a robust training approach to ensure that the flow network model reproduces the response of the original full model under a wide range of development strategies. This step helps preserve the flow network model's predictive power during the production optimization when development strategies can change at different iterations. The robust networks training and the subsequent production optimization iterations are computationally efficient as they are performed with the faster flow network model. We demonstrate the effectiveness and applicability of our proposed flow network modeling approach to rapid production optimization using two-phase waterflooding simulations in synthetic and benchmark models.

Lerlertpakdee, Pongsathorn

2012-08-01T23:59:59.000Z

388

Evaluation of low flow characteristics of the Vermont Yankee plant  

Science Conference Proceedings (OSTI)

Boiling water reactor (BWR) core flow instrumentation inaccuracies under low-flow conditions have been the subject of both reactor vendor and regulatory communications in response to incidents of the reported core flow being less than the flow corresponding to the natural-circulation line on the power flow map. During single recirculation loop operation, low-flow conditions exist in the idle recirculation loop, and these flow inaccuracies can affect the usefulness of the reported core flow. Accurate core flow indications are needed above 25% power to administer fuel thermal limits and comply with restrictions associated with the potential for thermal-hydraulic instability. While the natural-circulation line on the power flow map is recognized to be a nominal estimate of the flow expected at and near natural-circulation conditions, the boundaries of the stability regions are associated with conditions assumed in safety analyses performed to demonstrate compliance with general design criteria 10 and 12.

Ganther, S.; LeFrancoi, M.; Bergeron, P. [Yankee Atomic Electric Co., Bolton, MA (United States)

1997-12-01T23:59:59.000Z

389

Dynamic Multiscale Averaging (DMA) of Turbulent Flow  

SciTech Connect

A new approach called dynamic multiscale averaging (DMA) for computing the effects of turbulent flow is described. The new method encompasses multiple applications of temporal and spatial averaging, that is, multiscale operations. Initially, a direct numerical simulation (DNS) is performed for a relatively short time; it is envisioned that this short time should be long enough to capture several fluctuating time periods of the smallest scales. The flow field variables are subject to running time averaging during the DNS. After the relatively short time, the time-averaged variables are volume averaged onto a coarser grid. Both time and volume averaging of the describing equations generate correlations in the averaged equations. These correlations are computed from the flow field and added as source terms to the computation on the next coarser mesh. They represent coupling between the two adjacent scales. Since they are computed directly from first principles, there is no modeling involved. However, there is approximation involved in the coupling correlations as the flow field has been computed for only a relatively short time. After the time and spatial averaging operations are applied at a given stage, new computations are performed on the next coarser mesh using a larger time step. The process continues until the coarsest scale needed is reached. New correlations are created for each averaging procedure. The number of averaging operations needed is expected to be problem dependent. The new DMA approach is applied to a relatively low Reynolds number flow in a square duct segment. Time-averaged stream-wise velocity and vorticity contours from the DMA approach appear to be very similar to a full DNS for a similar flow reported in the literature. Expected symmetry for the final results is produced for the DMA method. The results obtained indicate that DMA holds significant potential in being able to accurately compute turbulent flow without modeling for practical engineering applications.

Richard W. Johnson

2012-09-01T23:59:59.000Z

390

Free Flow Power Corporation | Open Energy Information  

Open Energy Info (EERE)

Flow Power Corporation Flow Power Corporation Jump to: navigation, search Name Free Flow Power Corporation Address 239 Causeway St Suite 300 Place Gloucester, Massachusetts Zip 1930 Sector Marine and Hydrokinetic, Ocean Product Massachusetts-based company that has developed a turbine generator designed to extract energy from tides, ocean currents, rivers, streams, canals and conduits. Free Flow has raised some initial funding and is prototype testing in rivers and tanks. Year founded 2007 Number of employees 28 Phone number 978-232-3536 Website http://www.free-flow-power.com Coordinates 37.413962°, -76.526305° 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":37.413962,"lon":-76.526305,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

391

High precision high flow range control valve  

DOE Patents (OSTI)

A fluid control valve is described having a valve housing having first and second valve housing openings for the ingress and egress of fluid through the control valve. Disposed within a void formed by the control valve is a sleeve having at least one sleeve opening to permit the flow of fluid therethrough. A flow restricter travels within the sleeve to progressively block off the sleeve opening and thereby control flow. A fluid passageway is formed between the first valve housing opening and the outer surface of the sleeve. A second fluid passageway is formed between the inside of the sleeve and the second valve housing opening. Neither fluid passageway contains more than one 90.degree. turn. In the preferred embodiment only one of the two fluid passageways contains a 90.degree. turn. In another embodiment, the control valve housing is bifurcated by a control surface having control surface opening disposed therethrough. A flow restricter is in slidable contact with the control surface to restrict flow of fluid through the control surface openings.

McCray, John A. (Idaho Falls, ID)

1999-01-01T23:59:59.000Z

392

Ceramic Cross Flow Recuperator Design Parameters  

E-Print Network (OSTI)

GTE Products Corporation has developed a compact ceramic cross flow recuperator for high temperature industrial heat recovery applications. They recently completed a jointly funded project with the DOE, (Contract #EX-76-C-0 1-2162) to demonstrate the performance of the ceramic recuperator in various industrial furnaces. The ceramic cross flow recuperator core has multiple rectangular flow passages (perpendicular to each other) for the air and gas. Various flow passages are available contingent upon requirements of the particular application. In selecting and sizing a matrix for a given application, one may design a recuperator on the basis of a minimum for one or more of the following parameters; frontal area, length, volume, weight, pressure drop and cost. This paper discusses how the designer can select an optimum design from the various heat exchanger surfaces available and then predict the performance of a recuperator in any given application. The results of wind tunnel tests utilizing a single blow technique, determining a heat transfer parameter, the Colburn factor (j), and a flow friction parameter, Fanning Friction factor (f) are presented and discussed. Methods that illustrate how the (j) and (f) data can be used to compare the relative merits of two or more heat exchanger surface are presented. A typical furnace recuperation example is presented and calculations are detailed to illustrate the design procedures.

Gonzalez, J. M.; Rebello, W. J.

1981-01-01T23:59:59.000Z

393

Catalyst regeneration apparatus with radial flow distribution  

Science Conference Proceedings (OSTI)

Apparatus is described for regenerating spent hydrocarbon conversion catalyst. Catalyst particles in a vertically-elongated movable tapered bed are contacted with a hot oxygen-containing gas stream in order to remove, by means of combustion, coke which accumulated on the catalyst particles while they were used in a hydrocarbon conversion zone. Catalyst moves downward under the influence of gravity. The catalyst bed is tapered such that the thickness of the bed, in a dimension which is transverse to the direction of catalyst movement, varies from a minimum at the top of the tapered bed to a maximum at the bottom of the tapered bed. Gas passes through the tapered bed in a direction which is substantially transverse to the direction of catalyst movement. Substantially, all of the catalyst in the bed is in contact with the flowing gas. The variation in bed thickness causes a varying gas flow rate through the bed, from a maximum flow rate at the top of the tapered bed to a minimum flow rate at the bottom of the tapered bed and reduces the time that catalyst is exposed to high temperature gases. This flow pattern results in the delivery of oxygen in a manner which more closely matches the oxygen requirement for combustion at each point in the tapered bed. Advantages of the invention include increased coke burning capacity and longer catalyst life. Catalytic reforming is an example of a hydrocarbon conversion process in which the invention may be advantageously employed. 9 figs.

Sechrist, P.A.; Koves, W.J.

1994-01-11T23:59:59.000Z

394

Geochemical and Isotopic Interpretations of Groundwater Flow in the Oasis Valley Flow System, Southern Nevada  

SciTech Connect

This report summarizes the findings of a geochemical investigation of the Pahute Mesa-Oasis Valley groundwater flow system in southwestern Nevada. It is intended to provide geochemical data and interpretations in support of flow and contaminant transport modeling for the Western and Central Pahute Mesa Corrective Action Units.

J.M. Thomas; F.C. Benedict, Jr.; T.P. Rose; R.L. Hershey; J.B. Paces; Z.E. Peterman; I.M. Farnham; K.H. Johannesson; A.K. Singh; K.J. Stetzenbach; G.B. Hudson; J.M. Kenneally; G.F. Eaton; D.K. Smith

2003-01-08T23:59:59.000Z

395

A circuit theory based load flow tracing method considering counter-flow contribution  

Science Conference Proceedings (OSTI)

A new method to trace the power flow based on the converged AC power flow solution is proposed in this paper. The method is formulated by using the transmission network structure, the equivalent-current-injection and the load- equivalent-admittances ... Keywords: equivalent current injection, equivalent load impedance, generator contribution, line loss allocation

Whei-Min Lin; Tung-Sheng Zhan; Cong-Hui Huang

2006-04-01T23:59:59.000Z

396

Flow and diffusion distributed structures with noise at the inlet  

Science Conference Proceedings (OSTI)

Flow and diffusion distributed structures (FDS) are stationary spatially periodic patterns that can be observed in reaction-diffusion-advection systems. These structures arise when the flow rate exceeds a certain bifurcation point provided that concentrations ... Keywords: 47.54.-r, 82.40.Ck, Flow and diffusion distributed structures, Flow distributed oscillations, Noise, Pattern formation, Reaction-diffusion-advection system

Pavel V. Kuptsov; Razvan A. Satnoianu

2008-11-01T23:59:59.000Z

397

Time-Dependent Two-Layer Hydraulic Exchange Flows  

Science Conference Proceedings (OSTI)

A theory is presented for time-dependent two-layer hydraulic flows through straits. The theory is used to study exchange flows forced by a periodic barotropic (tidal) flow. For a given strait geometry the resulting flow is a function of two ...

Karl R. Helfrich

1995-03-01T23:59:59.000Z

398

Mathematical Model for Efficient Water Flow Curic Vladimir  

E-Print Network (OSTI)

Industry, Mathematical and Computer Modelling, 39, pp. 1353- 1374, 2004 [6] Jeppson R. Analysis of flow

Krejiæ, Nata�a

399

Future of Hydrogen Fuel Flows Through New NIST Test ...  

Science Conference Proceedings (OSTI)

Future of Hydrogen Fuel Flows Through New NIST Test Facility. For Immediate Release: February 16, 2010. ...

2012-10-15T23:59:59.000Z

400

Information flow analysis of energy management in a smart grid  

Science Conference Proceedings (OSTI)

Information flow security within the context of multilevel security deals with ways to avoid unwanted information flow from a high level domain to a low level domain. Several confidentiality and information flow properties have been formalized in literature. ... Keywords: bisimulation based non-deducibility on compositions, confidentiality, cyber-physical system, information flow, non-inference, security

Ravi Akella; Bruce M. McMillin

2010-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "accommodates two-way flows" 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

U.S. energy flow, 1992  

Science Conference Proceedings (OSTI)

This report discusses energy consumption in the United States which rose slightly in 1992, reflecting partial recovery from the economic recession that prevailed during the previous year. Increases were registered in all major end use sectors with the largest occurring in the industrial sector. Energy consumed for transportation, which reflects improved passenger fleet efficiencies and a growing population as well as economic activity, returned to 1989--1990 levels. The United States depended on petroleum for 41 % of its energy supply. Imports of crude oil and petroleum products increased to compensate for decline in domestic production. Imports rose to 44% of supply. Because domestic production of natural gas was close to 1991`s, increased demand was accommodated by larger (16%) imports from Canada. Coal production was virtually unchanged from 1991 and thus well below 1990 production. Nonetheless coal supplied about one quarter of US energy needs, primarily for electrical generation. For the third year electricity transmitted by utilities departed from historic growth trends; it remained at 1991 levels. The Energy Policy Act of 1992 was signed into law in October. Among its many provisions, this act encourages independent power producers to compete with the utilities in wholesale production of electricity, streamlines the licensing of nuclear power plants, promotes the development of renewable energy sources through tax incentives, imposes efficiency standards on many manufacturing items, requires federal and private fleets to buy vehicles that run on alternative fuels, and requires the Secretary of Energy to develop a plan to decrease oil consumption, increase the use of renewable energy, improve conversion efficiencies, and limit the emission of greenhouse gases.

Borg, I.Y.; Briggs, C.K.

1993-10-01T23:59:59.000Z

402

A Conductivity Relationship for Steady-state Unsaturated Flow Processes under Optimal Flow Conditions  

SciTech Connect

Optimality principles have been used for investigating physical processes in different areas. This work attempts to apply an optimal principle (that water flow resistance is minimized on global scale) to steady-state unsaturated flow processes. Based on the calculus of variations, we show that under optimal conditions, hydraulic conductivity for steady-state unsaturated flow is proportional to a power function of the magnitude of water flux. This relationship is consistent with an intuitive expectation that for an optimal water flow system, locations where relatively large water fluxes occur should correspond to relatively small resistance (or large conductance). Similar results were also obtained for hydraulic structures in river basins and tree leaves, as reported in other studies. Consistence of this theoretical result with observed fingering-flow behavior in unsaturated soils and an existing model is also demonstrated.

Liu, H. H.

2010-09-15T23:59:59.000Z

403

Method and apparatus for monitoring characteristics of a flow path having solid components flowing therethrough  

DOE Patents (OSTI)

A method and apparatus is provided for monitoring a flow path having plurality of different solid components flowing therethrough. For example, in the harvesting of a plant material, many factors surrounding the threshing, separating or cleaning of the plant material and may lead to the inadvertent inclusion of the component being selectively harvested with residual plant materials being discharged or otherwise processed. In accordance with the present invention the detection of the selectively harvested component within residual materials may include the monitoring of a flow path of such residual materials by, for example, directing an excitation signal toward of flow path of material and then detecting a signal initiated by the presence of the selectively harvested component responsive to the excitation signal. The detected signal may be used to determine the presence or absence of a selected plant component within the flow path of residual materials.

Hoskinson, Reed L. (Rigby, ID); Svoboda, John M. (Idaho Falls, ID); Bauer, William F. (Idaho Falls, ID); Elias, Gracy (Idaho Falls, ID)

2008-05-06T23:59:59.000Z

404

Precision Flow Technologies | Open Energy Information  

Open Energy Info (EERE)

Precision Flow Technologies Precision Flow Technologies Jump to: navigation, search Name Precision Flow Technologies Place Saugerties, New York Zip 12477 Product New York-based, firm focused on the design and manufacture of ultra high purity gas and control systems. Coordinates 42.07778°, -73.952459° 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":42.07778,"lon":-73.952459,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

405

Precision Flow Table | Open Energy Information  

Open Energy Info (EERE)

Table Table Jump to: navigation, search Basic Specifications Facility Name Flow Table Overseeing Organization United States Army Corp of Engineers (ERDC) Hydrodynamic Testing Facility Type Flow Table Length(m) 2.4 Beam(m) 1.2 Water Type Freshwater Cost(per day) Contact POC Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities None Channel/Tunnel/Flume Channel/Tunnel/Flume Yes Wind Capabilities Wind Capabilities None Control and Data Acquisition Description Automated data acquisition and control system Cameras None Available Sensors Flow, Pressure Range(psi), Turbulence, Velocity, Wave Probe Data Generation Capability Real-Time No Test Services Test Services Yes Past Pertinent Test Experience Users are District Engineers, Planners, and Engineering Consultants

406

Method for identifying anomalous terrestrial heat flows  

DOE Patents (OSTI)

A method for locating and mapping the magnitude and extent of terrestrial heat-flow anomalies from 5 to 50 times average with a tenfold improved sensitivity over orthodox applications of aerial temperature-sensing surveys as used for geothermal reconnaissance. The method remotely senses surface temperature anomalies such as occur from geothermal resources or oxidizing ore bodies by: measuring the spectral, spatial, statistical, thermal, and temporal features characterizing infrared radiation emitted by natural terrestrial surfaces; deriving from these measurements the true surface temperature with uncertainties as small as 0.05 to 0.5 K; removing effects related to natural temperature variations of topographic, hydrologic, or meteoric origin, the surface composition, detector noise, and atmospheric conditions; factoring out the ambient normal-surface temperature for non-thermally enhanced areas surveyed under otherwise identical environmental conditions; distinguishing significant residual temperature enhancements characteristic of anomalous heat flows and mapping the extent and magnitude of anomalous heat flows where they occur.

Del Grande, Nancy Kerr (San Leandro, CA)

1977-01-25T23:59:59.000Z

407

Estimated Water Flows in 2005: United States  

Science Conference Proceedings (OSTI)

Flow charts depicting water use in the United States have been constructed from publicly available data and estimates of water use patterns. Approximately 410,500 million gallons per day of water are managed throughout the United States for use in farming, power production, residential, commercial, and industrial applications. Water is obtained from four major resource classes: fresh surface-water, saline (ocean) surface-water, fresh groundwater and saline (brackish) groundwater. Water that is not consumed or evaporated during its use is returned to surface bodies of water. The flow patterns are represented in a compact 'visual atlas' of 52 state-level (all 50 states in addition to Puerto Rico and the Virgin Islands) and one national water flow chart representing a comprehensive systems view of national water resources, use, and disposition.

Smith, C A; Belles, R D; Simon, A J

2011-03-16T23:59:59.000Z

408

Fuel cell with internal flow control  

SciTech Connect

A fuel cell stack is provided with a plurality of fuel cell cassettes where each fuel cell cassette has a fuel cell with an anode and cathode. The fuel cell stack includes an anode supply chimney for supplying fuel to the anode of each fuel cell cassette, an anode return chimney for removing anode exhaust from the anode of each fuel cell cassette, a cathode supply chimney for supplying oxidant to the cathode of each fuel cell cassette, and a cathode return chimney for removing cathode exhaust from the cathode of each fuel cell cassette. A first fuel cell cassette includes a flow control member disposed between the anode supply chimney and the anode return chimney or between the cathode supply chimney and the cathode return chimney such that the flow control member provides a flow restriction different from at least one other fuel cell cassettes.

Haltiner, Jr., Karl J. (Fairport, NY); Venkiteswaran, Arun (Karnataka, IN)

2012-06-12T23:59:59.000Z

409

Radial flow nuclear thermal rocket (RFNTR)  

DOE Patents (OSTI)

A radial flow nuclear thermal rocket fuel assembly includes a substantially conical fuel element having an inlet side and an outlet side. An annular channel is disposed in the element for receiving a nuclear propellant, and a second, conical, channel is disposed in the element for discharging the propellant. The first channel is located radially outward from the second channel, and separated from the second channel by an annular fuel bed volume. This fuel bed volume can include a packed bed of loose fuel beads confined by a cold porous inlet frit and a hot porous exit frit. The loose fuel beads include ZrC coated ZrC-UC beads. In this manner, nuclear propellant enters the fuel assembly axially into the first channel at the inlet side of the element, flows axially across the fuel bed volume, and is discharged from the assembly by flowing radially outward from the second channel at the outlet side of the element.

Leyse, Carl F. (Idaho Falls, ID)

1995-01-01T23:59:59.000Z

410

Energy Flow Models for the Steel Industry  

E-Print Network (OSTI)

Energy patterns in the U. S. steel industry are examined using several models. First is an end-use model based on data in the 1994 Manufacturing Energy Consumption Survey (MECS). Then a seven-step process model is presented and material flow through each step is calibrated against Commerce Dept. data. Third, a detailed energy flow model is presented for coke ovens and blast furnaces, two very energy-intensive steps in our seven step model of steelmaking. This process-step model is calibrated against both our energy end use and material flow models. These models can serve as the base case for simulating changes in energy utilization and waste streams for steelmaking spurred by economic or regulatory conditions or technology innovations.

Hyman, B.; Andersen, J. P.

1998-04-01T23:59:59.000Z

411

Real gas effects for compressible nozzle flows  

SciTech Connect

Numerical simulation of compressible nozzle flows of real gas with or without the addition of heat is presented. A generalized real gas method, using an upwind scheme and curvilinear coordinates, is applied to solve the unsteady compressible Euler equations in axisymmetric form. The present method is an extension of a previous 2D method, which was developed to solve the problem for a gas having the general equation of state in the form p=p ([rho], i). In the present work the method is generalized for an arbitrary P-V-T equation of state introducing an iterative procedure for the determination of the temperature from the specific internal energy and the flow variables. The solution procedure is applied for the study of real gas effects in an axisymmetric nozzle flow.

Drikakis, D.; Tsangaris, S. (National Technical Univ. of Athens, (Greece). Dept. of Mechanical Engineering)

1993-03-01T23:59:59.000Z

412

LARGE-SCALE FLOWS IN PROMINENCE CAVITIES  

Science Conference Proceedings (OSTI)

Regions of rarefied density often form cavities above quiescent prominences. We observed two different cavities with the Coronal Multichannel Polarimeter on 2005 April 21 and with Hinode/EIS on 2008 November 8. Inside both of these cavities, we find coherent velocity structures based on spectral Doppler shifts. These flows have speeds of 5-10 km s{sup -1}, occur over length scales of tens of megameters, and persist for at least 1 hr. Flows in cavities are an example of the nonstatic nature of quiescent structures in the solar atmosphere.

Schmit, D. J. [Department of Astrophysical and Planetary Sciences, University of Colorado-Boulder, UCB 391, Boulder, CO 80309 (United States); Gibson, S. E.; Tomczyk, S. [High Altitude Observatory, National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307 (United States); Reeves, K. K. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, MS 58, Cambridge, MA 02138 (United States); Sterling, Alphonse C. [NASA Marshall Space Flight Center, Space Science Office, VP62, Huntsville, AL 35805 (United States); Brooks, D. H. [Space Science Division, Naval Research Laboratory, Washington, DC 20375 (United States); Williams, D. R. [Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey RH5 6NT (United Kingdom); Tripathi, D. [Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA (United Kingdom)

2009-08-01T23:59:59.000Z

413

The Entropy Solutions for the Lighthill-Whitham-Richards Traffic Flow Model with a Discontinuous Flow-Density Relationship  

Science Conference Proceedings (OSTI)

In this paper we explicitly construct the entropy solutions for the Lighthill-Whitham-Richards (LWR) traffic flow model with a flow-density relationship which is piecewise quadratic, concave, but not continuous at the junction points where two quadratic ... Keywords: LWR model, WENO scheme, discontinuous flow-density relationship, entropy solution, traffic flow

Yadong Lu; S. C. Wong; Mengping Zhang; Chi-Wang Shu

2009-11-01T23:59:59.000Z

414

Massively parallel computing simulation of fluid flow in the unsaturated zone of Yucca Mountain, Nevada  

E-Print Network (OSTI)

flows of multiphase, multicomponents in porous and fracturedmultiphase flow and multicomponent transport in porous and

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

2001-01-01T23:59:59.000Z

415

NIST-GCR-92-607 Flow Through Horizontal Vents as Related ...  

Science Conference Proceedings (OSTI)

... drainage system [l?]. Similarly, many environmental and geothermal flow processes, flows in nuclear reactor vessel systems ...

2004-05-25T23:59:59.000Z

416

The effects between two slotted plate flow meter under single, two, three components flow condition  

E-Print Network (OSTI)

In previous work on the slotted flow meter, repeatibility and reproducibility were studied under different flow conditions and different configurations. In accordance with previous work, the effects of the distance between the slotted plate were identified as an area requring further investigation. The preset 5D distance is expanded to the 10D distance. The flow coefficient KY, the pressure drop, and the uncertainty analysis is conducted. There were definite deference in the results between the 5D distance and the 10D distance in many aspects. As a base line, the flow coefficient KY showed 0.8% ~ 2% difference between the 5D and the 10D distance case. Depending upon the upstream flow conditions, the reproducibility of the slotted flow meter was affected. The pressure drop increased as the upstream Reynolds number increased. The result from the analysis of the water cut meter showed that there are definite relationships between the parameteres of the water cut meter and the parameters of the flow.

Park, Sang Hyan

2004-12-01T23:59:59.000Z

417

Flow Stability of Supercritical Water Cooled Systems  

SciTech Connect

Research activities are ongoing worldwide to develop nuclear power plants with supercritical water cooled reactor (SCWR) with the purpose to achieve a high thermal efficiency and to improve their economical competitiveness. However, the strong variation of the thermal-physical properties of water in the vicinity of the pseudo-critical line results in challenging tasks in thermal-hydraulic design of a SCWR. One of the challenging tasks is to understand and to predict the dynamic behavior and flow stability of supercritical water cooled systems. Although extensive thermal-hydraulic research activities have been carried out worldwide, studies on flow stability of SC water cooled systems are scarce. The present study deals with the flow behavior of SC water cooled systems. For this purpose the computer code SASC was developed, which is applied to a simplified cooling system. The effect of various parameters on the flow behavior is investigated. The first results achieved up to now reveals a complicated dynamic performance of a system cooled by supercritical water. (authors)

Cheng, X.; Kuang, B.; Yang, Y.H. [School of Nuclear Science and Engineering, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai 200030 (China)

2006-07-01T23:59:59.000Z

418

Appendix F Stream Flow.xls  

Office of Legacy Management (LM)

Stream Flow Measurement Results Since 2000 Stream Flow Measurement Results Since 2000 This page intentionally left blank Appendix F Stream Flow Measurement Results Since 2000 Collect Date Surface ID Calculated Flow (ft 3 /sec) Comments 1/14/2000 CARB POND TRENCH OUT 0.25 Carb Pond trench outfall 1/14/2000 MNT CR E OF HWY CULV 0.22 MONTEZUMA CREEK 100 FT EAST OF HIGHWAY CULVERT 1/14/2000 MC>CUTOFFTRENCH CLAY 0.19 Montezuma Creek above ground water cutoff trench, clay bottom. 4/14/2000 MIDPOND OUTFALL PIPE 0.26 Middle Pond outfall pipe (groundwater impoundment in old Van Pile area) 4/14/2000 >VANPILE-STEEP/LINED 0.38 Montezuma Creek above old Vanadium Pile, where gradient steepens/lined. 4/14/2000 SW00-01 0.44 MONTEZUMA CREEK 100 FT EAST OF HIGHWAY CULVERT 4/14/2000 SW00-02 0.74 Pipe outfall at east end of millsite

419

Diagram 5. Electricity Flow, 2007 (Quadrillion Btu)  

E-Print Network (OSTI)

generation. f Transmission and distribution losses (electricity losses that occur between the pointDiagram 5. Electricity Flow, 2007 (Quadrillion Btu) Energy Information Administration / Annual Energy Review 2007 221 Coal 20.99 Nuclear Electric Power 8.41 Energy Consumed To Generate Electricity 42

Bensel, Terrence G.

420

Novel additives to retard permeable flow  

Science Conference Proceedings (OSTI)

Low concentrations of surfactant and cosolute in water, can selectively retard permeable flow in high permeability rocks compared to low permeability ones. This represents a way forward for more efficient areal sweep efficiency when water flooding a reservoir during improved oil recovery. (author)

Golombok, Michael [Shell Exploration and Production, Kessler Park 1, 2288 GS Rijswijk (Netherlands); Department of Mechanical Engineering, Technische Universiteit Eindhoven, 5600 MB Eindhoven (Netherlands); Crane, Carel; Ineke, Erik; Welling, Marco [Shell Exploration and Production, Kessler Park 1, 2288 GS Rijswijk (Netherlands); Harris, Jon [Shell Exploration and Production, Kessler Park 1, 2288 GS Rijswijk (Netherlands); Shell UK Ltd., North Anderson Drive, Aberdeen, AB15 6BL (United Kingdom)

2008-09-15T23:59:59.000Z

Note: This page contains sample records for the topic "accommodates two-way flows" 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

Potential Vorticity of Flow along the Alps  

Science Conference Proceedings (OSTI)

Observations from the German Front Experiment are presented here that show the existence—in conditions with a dominant flow component parallel to the main Alpine chain—of a mesoscale region to the north of the Alps where the absolute and ...

Alan J. Thorpe; Hans Volkert; Dietrich Heimann

1993-06-01T23:59:59.000Z

422

Numerical Simulation of Slope and Mountain Flows  

Science Conference Proceedings (OSTI)

Early descriptive models of mountain-valley circulations indicated that the mountain flow (i.e., the along-valley axis component out of the valley) is a true three-dimensional phenomenon. According to these descriptions, at night shallow-down ...

Richard T. McNider; Roger A. Pielke

1984-10-01T23:59:59.000Z

423

Adding parallelism to visual data flow programs  

Science Conference Proceedings (OSTI)

Programming in parallel is an error-prone and complex task compounded by the lack of tool support for both programming and debugging. Recent advances in compiler-directed shared memory APIs, such as OpenMP, have made shared-memory parallelism more widely ... Keywords: data flow, parallel, visual language

Philip Cox; Simon Gauvin; Andrew Rau-Chaplin

2005-05-01T23:59:59.000Z

424

Expressing Belief Flow in Assertion Networks  

Science Conference Proceedings (OSTI)

In the line of some earlier work done on belief dynamics, we propose an abstract model of belief propagation on a graph based on the methodology of the revision theory of truth. A set of postulates is proposed, a dynamic language is developed for portraying ... Keywords: Assertion network, belief flow, belief merging, stability

Sujata Ghosh; Fernando R. Velázquez-Quesada

2009-03-01T23:59:59.000Z

425

EXPERIMENTAL AND THEORETICAL INVESTIGATION OF MULTIPHASE FLOW  

E-Print Network (OSTI)

. A laboratory flow apparatus was built to obtain data on water-air imbibition and oil-water drainage have also been analyzed. In the case of water-air imbibition, the thin fracture system showed a more with a 1mm spacer between the blocks, and a two- block system with no spacer. The blocks were sealed

426

A new structure for bidirectional power flow  

Science Conference Proceedings (OSTI)

In this paper, methods of energy recovery for electric motors in braking mode are presented. Also for motors with low and medium regenerative power, a low cost and simple structure is proposed. In this method, for converting the high voltage of DC bus ... Keywords: bidirectional power flow, energy saving, regenerative brake

Seyed Borhan Azimi; Hassan Ghafoori Fard

2005-03-01T23:59:59.000Z

427

Increased Power Flow Guidebook - Underground Cables  

Science Conference Proceedings (OSTI)

Utilities must consider a number of factors when evaluating uprating and upgrading options for underground transmission cables. This comprehensive guidebook documents the state-of-science for increasing power flow capacities of underground transmission cables. It provides an overview of underground transmission cable ratings and uprating techniques so that the maximum utilization can be obtained from the existing underground transmission infrastructure.

2003-12-01T23:59:59.000Z

428

Flow and Changes in Appearance Julie Dorsey  

E-Print Network (OSTI)

. We model the flow as a particle system, each particle represent- ing a "drop" of water. The motion of the water particles is controlled by parameters such as gravity, friction, wind, roughness, and con- straints that force the particles to maintain contact with the surface. The chemical interaction

Dorsey, Julie

429

Collisions of particles advected in random flows  

E-Print Network (OSTI)

We consider collisions of particles advected in a fluid. As already pointed out by Smoluchowski [Z. f. physik. Chemie XCII, 129-168, (1917)], macroscopic motion of the fluid can significantly enhance the frequency of collisions between the suspended particles. This effect was invoked by Saffman and Turner [J. Fluid Mech. 1, 16-30, (1956)] to estimate collision rates of small water droplets in turbulent rain clouds, the macroscopic motion being caused by turbulence. Here we show that the Saffman-Turner theory is unsatisfactory because it describes an initial transient only. The reason for this failure is that the local flow in the vicinity of a particle is treated as if it were a steady hyperbolic flow, whereas in reality it must fluctuate. We derive exact expressions for the steady-state collision rate for particles suspended in rapidly fluctuating random flows and compute how this steady state is approached. For incompressible flows, the Saffman-Turner expression is an upper bound.

K. Gustavsson; B. Mehlig; M. Wilkinson

2008-01-18T23:59:59.000Z

430

Industrial Structure and Financial Capital Flows ?  

E-Print Network (OSTI)

Commodity trade and financial asset trade are both integral parts of globalization, yet little has been studied on their interplay. In a framework that integrates these two paradigms of trade, a new force driving international capital flows emerges: capital tends to flow towards countries that become more specialized in capital-intensive industries (a composition effect). This force competes with the standard, “convergence force ” which channels capital towards the location where it is more scarce, in response shocks such as globalization, country-specific labor force or labor-technology shock shocks. If the composition effect dominates, capital flows away from the country hit by a positive shock—“a flow reversal”—and asset prices rise globally rather than locally. Two implications arise: rich countries ’ current account deficits may be a consequence of their shifting towards capital-intensive industries; young and fast growing developing countries may help sustain asset prices in an aging industrialized world. Predictions of the current account and specialization patterns are shown to be consistent with the data.

Keyu Jin

2009-01-01T23:59:59.000Z

431

Integrating hardware and software information flow analyses  

Science Conference Proceedings (OSTI)

Security-critical communications devices must be evaluated to the highest possible standards before they can be deployed. This process includes tracing potential information flow through the device's electronic circuitry, for each of the device's operating ... Keywords: communications devices, embedded software, information security evaluation

Colin J. Fidge; Diane Corney

2009-06-01T23:59:59.000Z

432

MATPOWER's Extensible Optimal Power Flow Architecture  

E-Print Network (OSTI)

of MATPOWER's extensible OPF architecture. Index Terms--Load flow analysis, Optimization methods, Power-compiled solvers. A software object is used to encapsulate the definition of the problem formulation, manage tasks. The software design has the advantage of minimizing the coupling between variables, constraints

Tesfatsion, Leigh

433

Modelling Information Flows in Financial Markets  

E-Print Network (OSTI)

This paper presents an overview of information-based asset pricing. In this approach, an asset is defined by its cash-flow structure. The market is assumed to have access to "partial" information about future cash flows. Each cash flow is determined by a collection of independent market factors called X-factors. The market filtration is generated by a set of information processes, each of which carries information about one of the X-factors, and eventually reveals the X-factor. Each information process has two terms, one of which contains a "signal" about the associated X-factor, and the other of which represents "market noise". The price of an asset is given by the expectation of the discounted cash flows in the risk-neutral measure, conditional on the information provided by the market. When the market noise is modelled by a Brownian bridge one is able to construct explicit formulae for asset prices, as well as semi-analytic expressions for the prices and greeks of options and derivatives. In particular, op...

Brody, Dorje C; Macrina, Andrea

2010-01-01T23:59:59.000Z

434

Proper Orthogonal Decomposition for Flow Calculations  

E-Print Network (OSTI)

Proper Orthogonal Decomposition for Flow Calculations and Optimal Control in a Horizontal CVD calculations are discussed. AMS Subject Classification: 76N10, 65K10, 49J20 & 35C10 \\Lambda This research a chemical reaction in the gas phase above the surface of the film to deposit desired materials onto

435

Repeat on input for data flow computers  

DOE Patents (OSTI)

A processing node for a data flow parallel processing computer is activated by an input token from the system. The token or the stored information in the node includes information to cause the node to repeat a specified sequence of operations upon initiation by the token, thereby increasing the efficiency system for some computing operations.

Grafe, V.G.; Hoch, J.E.

1989-12-27T23:59:59.000Z

436

State energy flow patterns. [All 50 states  

SciTech Connect

Highly visual and self-explanatory 1975 energy flow diagrams are presented for each of the 50 states and for the entire United States. Each diagram illustrates the energy produced and how it is consumed or lost. The diagrams are meant to serve as a convenient and useful reference (or starting point) for consideration of energy-related problems.

Kidman, R.B.; Barrett, R.J.

1977-01-01T23:59:59.000Z

437

Optimization neural network for solving flow problems  

Science Conference Proceedings (OSTI)

This paper describes a neural network for solving flow problems, which are of interest in many areas of application as in fuel, hydro, and electric power scheduling. The neural network consist of two layers: a hidden layer and an output layer. The hidden ...

R. Perfetti

1995-09-01T23:59:59.000Z

438

Scale-up of oscillatory flow mixing  

E-Print Network (OSTI)

ratio* Baffle constric- tion % 1989 Brunold et al Flow visualisation 46 3.75 1.5 55 1989 Dickens et al RTD measurement 23 0.67 1.5 68 1990 Howes & Mackley Axial Dispersion 51 2.5 1.5 61 1990 Mackley et al Heat Transfer 12 1 1.5 66 1991 Mackley...

Smith, Keith Buchanan

2000-02-15T23:59:59.000Z

439

LES algorithm for turbulent reactive flows simulation  

Science Conference Proceedings (OSTI)

The paper presents the development and implementation of a Large Eddy Simulation numerical algorithm for simulating turbulent reactive flows. The numerical algorithm is based on a 5 step modified Runge - Kutta numerical scheme with a dual time stepping ... Keywords: Runge - Kutta numerical scheme, large eddy simulation, linear eddy model

Ionut Porumbel; Cristian Cârl?nescu; Florin Gabriel Florean; Constantin Eusebiu Hritcu

2010-10-01T23:59:59.000Z

440

Analog Integrated 2-D Optical Flow Sensor  

Science Conference Proceedings (OSTI)

I present a new focal-plane analog very-large-scale-integrated (aVLSI) sensor that estimates optical flow in two visual dimensions. Its computational architecture consists of a two-layer network of locally connected motion units that collectively ... Keywords: constraint satisfaction, neuromorphic, parallel computation, recurrent network, regularization

Alan A. Stocker

2006-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "accommodates two-way flows" 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

System for measuring multiphase flow using multiple pressure differentials  

DOE Patents (OSTI)

An improved method and system for measuring a multi-phase flow in a pressure flow meter. An extended throat venturi is used and pressure of the multi-phase flow is measured at three or more positions in the venturi, which define two or more pressure differentials in the flow conduit. The differential pressures are then used to calculate the mass flow of the gas phase, the total mass flow, and the liquid phase. The system for determining the mass flow of the high void fraction fluid flow and the gas flow includes taking into account a pressure drop experienced by the gas phase due to work performed by the gas phase in accelerating the liquid phase.

Fincke, James R. (Idaho Falls, ID)

2003-01-01T23:59:59.000Z

442

Collisions of Small Drops in a Turbulent Flow. Part II: Effects of Flow Accelerations  

Science Conference Proceedings (OSTI)

The effects of Lagrangian acceleration on collision efficiency and collision kernels of small cloud droplets in a turbulent flow are investigated using the results of the recent laboratory experiments by La Porta et al., conducted under high Re? ...

M. B. Pinsky; A. P. Khain

2004-08-01T23:59:59.000Z

443

Flow in geothermal wells: Part III. Calculation model for self-flowing well  

DOE Green Energy (OSTI)

The theoretical model described predicts the temperature, pressure, dynamic dryness fraction, and void fraction along the vertical channel of two-phase flow. The existing data from operating wells indicate good agreement with the model. (MHR)

Bilicki, Z.; Kestin, J.; Michaelides, E.E.

1981-06-01T23:59:59.000Z

444

Development of a model to predict flow oscillations in low-flow sodium boiling  

E-Print Network (OSTI)

An experimental and analytical program has been carried out in order to better understand the cause and effect of flow oscillations in boiling sodium systems. These oscillations have been noted in previous experiments with ...

Levin, Alan Edward

1980-01-01T23:59:59.000Z

445

Hydrogen-Bromine Flow Battery: Hydrogen Bromine Flow Batteries for Grid Scale Energy Storage  

SciTech Connect

GRIDS Project: LBNL is designing a flow battery for grid storage that relies on a hydrogen-bromine chemistry which could be more efficient, last longer and cost less than today’s lead-acid batteries. Flow batteries are fundamentally different from traditional lead-acid batteries because the chemical reactants that provide their energy are stored in external tanks instead of inside the battery. A flow battery can provide more energy because all that is required to increase its storage capacity is to increase the size of the external tanks. The hydrogen-bromine reactants used by LBNL in its flow battery are inexpensive, long lasting, and provide power quickly. The cost of the design could be well below $100 per kilowatt hour, which would rival conventional grid-scale battery technologies.

2010-10-01T23:59:59.000Z

446

Investigation of Flow-Accelerated Corrosion Under Two-Phase Flow Conditions  

Science Conference Proceedings (OSTI)

Carbon steel (CS) components in steam systems frequently suffer from flow-accelerated corrosion (FAC). Although the mechanism of FAC in fossil plants has been largely understood for almost 40 years, it remains one of the major safety issues for plant management and personnel. FAC occurs across the feedwater system from the condensate pump to the economizer inlet, with the heater drains systems being particularly susceptible. It is equally dangerous in both the single- and two-phase flow regions. ...

2013-01-30T23:59:59.000Z

447

Evaluation of a slotted orifice plate flow meter using horizontal two phase flow  

E-Print Network (OSTI)

In the past several years, the slotted orifice plate has been evaluated for its performance as a single phase flow meter using air and as a two-phase flow meter using water and air. These previous studies have both shown superior performance to that of the standard orifice plate flow meter. The purpose of this study is to evaluate the slotted orifice plate two-phase flow meter with water and steam as the working fluids and compare this data with previous data taken from other test facilities to further develop the calibration of this new two-phase flow meter. Tests for repeatability will be shown for beta ratios of 0.430, 0.467, and 0.500. Reproducibility will also be evaluated between a water and steam facility and three water and air facilities. This includes comparing data obtained using a set of brass slotted orifice plates and a set of stainless steel slotted orifice plates. The brass plates were tested in one water and air facility in a previous study and the stainless steel plates were tested using two phase data from air and water and also from steam and water. Differential pressure effects using water and steam as a mixture will be considered since there is a change in fluid quality as the fluid drops in pressure across an orifice plate. Reproducibility from six different data sets found using different facilities, different slotted orifice plates, and different working fluids were shown to converge to the same relationship. This relationship contained non-dimensional variables which included the calibration coefficient (KY= flow coefficient (K) multiplied by the expansion factor (Y)), the Euler number, and the beta ratio. These results were analyzed to develop a calibration for the slotted orifice plate two-phase flow meter which can ultimately be used to determine the flow rate of a two-phase mixture.

Flores, Anita Elena

2000-01-01T23:59:59.000Z

448

Turbulent Shear Flows 9: Selected Papers from the Ninth International Symposium on Turbulent Shear Flows, Kyoto, Japan, August 16-18, 1993, 1st edition  

Science Conference Proceedings (OSTI)

This volume from the well-known series on turbulent shear flows contains four parts on closures and fundamentals, free flows, wall flows and combustion and recirculating flows. Each section begins with an invited introductory article followed by a selection ...

Franz Durst; Nobuhide Kasagi; Brian E. Launder; Frank W. Schmidt; Kenjiro Suzuki; James H. Whitelaw

2012-07-01T23:59:59.000Z

449

Flow Cells for Energy Storage Workshop Overview  

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

Electricity Delivery Electricity Delivery & Energy Reliability Organized by: Energy Efficiency & Renewable Energy W i t h h e l p b y : Agenda Day/Time Speaker Subject Wednesday, March 07, 2012 8:45-9:00 Adam Weber, LBNL Welcome and workshop overview 9:00-9:30 Various, EERE, OFCT Background, approach, and reversible fuel cells 9:30-9:55 Michael Perry, UTRC Renaissance in flow cells: opportunities 9:55-10:20 Joe Eto, LBNL Energy storage requirements for the smart grid 10:20-10:35 AM Break 10:35-11:00 Robert Savinell, CWRU Revisiting flow-battery R&D 11:00-11:25 Stephen Clarke, Applied Intellectual Capital Lessons learned and yet to be learned from 20 years in RFB R&D 11:25-11:45 Imre Gyuk, DOE OE Research and deployment of stationary storage at DOE

450

Progress in Grid Scale Flow Batteries  

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

Grid Scale Flow Batteries IMRE GYUK, PROGRAM MANAGER ENERGY STORAGE RESEARCH, DOE FlowBat 03- 07- 12 Without technological breakthroughs in efficient, large scale Energy Storage, it will be difficult to rely on intermittent renewables for much more than 20-30% of our Electricity. Secretary Chu, Feb. 2010 The need for regulation services can dramatically increase as the amount of variable renewable resources is increased. Local storage is among the best means to ensure we can reliably integrate renewable energy resources into the grid. Chairman Wellinghoff, FERC, March 2010 Transmission and storage capacity are key issues for energy resource planning. If you like wind power, you have to love transmission and storage. Terry Boston , CEO, PJM, June 2010

451

Brine flow in heated geologic salt.  

Science Conference Proceedings (OSTI)

This report is a summary of the physical processes, primary governing equations, solution approaches, and historic testing related to brine migration in geologic salt. Although most information presented in this report is not new, we synthesize a large amount of material scattered across dozens of laboratory reports, journal papers, conference proceedings, and textbooks. We present a mathematical description of the governing brine flow mechanisms in geologic salt. We outline the general coupled thermal, multi-phase hydrologic, and mechanical processes. We derive these processes' governing equations, which can be used to predict brine flow. These equations are valid under a wide variety of conditions applicable to radioactive waste disposal in rooms and boreholes excavated into geologic salt.

Kuhlman, Kristopher L.; Malama, Bwalya

2013-03-01T23:59:59.000Z

452

Flow of particle suspensions through porous media  

DOE Green Energy (OSTI)

A new attempt is made to study the mechanisms of particle invasions into porous media. The following subjects are described: A critical survey of the literature indicating that the mechanism of particle invasions is not known in sufficient detail. The pros and cons of existing particle measuring devices are briefly described. Results from a new laboratory study on particle characterizations are given. The results of the laboratory studies on the flow of particle suspensions through porous media (up to 200 md) are discussed. The effects of flow rate and particle concentrations on the amount of damage (i.e., permeability impairment) and depth of penetration (from core inlet towards outlet) are particularly emphasized. Filter methods (e.g., using millipore filter) cannot be used to determine particle invasions into porous medium. Any predictions of the injection problems based on millipore (or any other filter) measurements are useless and should be discarded.

Vetter, O.J.; Kandarpa, V.; Harouaka, A.

1982-06-22T23:59:59.000Z

453

Investigation of flow characteristics of gas turbines  

SciTech Connect

Measurements carried out in the process of assimilation of gas turbine (GT) plants of 16 different types in starting and working conditions to estimate the operational conditions and characteristics of the main elements (in particular of the turbines) have created a basis for generaliztion of flow characteristics of different turbines and for extending them to a wider range of operational conditions. The studies showed that: flow characteristics of the investigated turbines, independently of the number of stages and the degree of reaction, are described by the elliptic flowrate equation; throughput of similar turbines, i.e., of turbines formed of stages with high reaction, which have low design degrees of expansion, can be determined with satisfactory accuracy by the unique function of the degree of expansion; and in operating the gas turbine plants considerable changes in throughput of the turbines are possible.

Ol' khovskii, G.G.; Ol' khovskaya, N.I.

1978-01-01T23:59:59.000Z

454

Numerical models for high beta magnetohydrodynamic flow  

Science Conference Proceedings (OSTI)

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

Brackbill, J.U.

1987-01-01T23:59:59.000Z

455

Can aerosols be trapped in open flows?  

E-Print Network (OSTI)

The fate of aerosols in open flows is relevant in a variety of physical contexts. Previous results are consistent with the assumption that such finite-size particles always escape in open chaotic advection. Here we show that a different behavior is possible. We analyze the dynamics of aerosols both in the absence and presence of gravitational effects, and both when the dynamics of the fluid particles is hyperbolic and nonhyperbolic. Permanent trapping of aerosols much heavier than the advecting fluid is shown to occur in all these cases. This phenomenon is determined by the occurrence of multiple vortices in the flow and is predicted to happen for realistic particle-fluid density ratios.

Rafael D. Vilela; Adilson E. Motter

2007-06-10T23:59:59.000Z

456

Flow simulation in industrial cyclone separator  

Science Conference Proceedings (OSTI)

The problem of ash settling on super-heater tube bank, due to improper velocity distribution, in the cyclone separator used at Circulating Fluidized Bed Combustion (CFBC) has been investigated by means of computational fluid dynamic techniques. With ... Keywords: CAD model, CFD - finite volume technique, Circulating fluidized bed combustion, Flow recirculation - geometry modification, Particle Trajectories, Partition plates, Pressure based algorithms, Pressure drop, Recycle cyclone collector, Structured multi-block grids

C. Bhasker

2010-02-01T23:59:59.000Z

457

Vortex flow visualization using tetrahedral cell subdivision  

Science Conference Proceedings (OSTI)

Proposes an effective technique for searching for critical points, which are points at which the velocity vector is zero. The previous method, using tetrahedral-cell subdivision, often generates multiple critical points in a hexahedral cell, and this ... Keywords: Newton's method, critical point searching technique, hexahedral cell, linear interpolation function, multiple critical points, numerical integration scheme, precise position calculation, tetrahedral cell subdivision, trilinear interpolation function, velocity vector, vortex flow visualization, vortices

A. Doi; S. Suzuki; K. Koyamada; S. Sannakanishi

1997-10-01T23:59:59.000Z

458

Power-Flow Management - Technology Perspectives  

Science Conference Proceedings (OSTI)

The report provides a technical overview for power-flow management technologies with special emphasis on power electronic-based technologies. This includes both thyristor-based and converter-based technologies. The report thoroughly describes the fundamental relationships of alternating current (AC) power transmission at steady-state and dynamic conditions; the document also describes transmission problems and needs. This overview clearly demonstrates the role of power electronic-based Controllers and th...

2007-11-05T23:59:59.000Z

459

Review and selection of unsaturated flow models  

SciTech Connect

Since the 1960`s, ground-water flow models have been used for analysis of water resources problems. In the 1970`s, emphasis began to shift to analysis of waste management problems. This shift in emphasis was largely brought about by site selection activities for geologic repositories for disposal of high-level radioactive wastes. Model development during the 1970`s and well into the 1980`s focused primarily on saturated ground-water flow because geologic repositories in salt, basalt, granite, shale, and tuff were envisioned to be below the water table. Selection of the unsaturated zone at Yucca Mountain, Nevada, for potential disposal of waste began to shift model development toward unsaturated flow models. Under the US Department of Energy (DOE), the Civilian Radioactive Waste Management System Management and Operating Contractor (CRWMS M&O) has the responsibility to review, evaluate, and document existing computer models; to conduct performance assessments; and to develop performance assessment models, where necessary. This document describes the CRWMS M&O approach to model review and evaluation (Chapter 2), and the requirements for unsaturated flow models which are the bases for selection from among the current models (Chapter 3). Chapter 4 identifies existing models, and their characteristics. Through a detailed examination of characteristics, Chapter 5 presents the selection of models for testing. Chapter 6 discusses the testing and verification of selected models. Chapters 7 and 8 give conclusions and make recommendations, respectively. Chapter 9 records the major references for each of the models reviewed. Appendix A, a collection of technical reviews for each model, contains a more complete list of references. Finally, Appendix B characterizes the problems used for model testing.

Reeves, M.; Baker, N.A.; Duguid, J.O. [INTERA, Inc., Las Vegas, NV (United States)

1994-04-04T23:59:59.000Z

460

Fuel Cell Technologies Office: Flow Cells for Energy Storage Workshop  

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

Flow Cells for Energy Flow Cells for Energy Storage Workshop to someone by E-mail Share Fuel Cell Technologies Office: Flow Cells for Energy Storage Workshop on Facebook Tweet about Fuel Cell Technologies Office: Flow Cells for Energy Storage Workshop on Twitter Bookmark Fuel Cell Technologies Office: Flow Cells for Energy Storage Workshop on Google Bookmark Fuel Cell Technologies Office: Flow Cells for Energy Storage Workshop on Delicious Rank Fuel Cell Technologies Office: Flow Cells for Energy Storage Workshop on Digg Find More places to share Fuel Cell Technologies Office: Flow Cells for Energy Storage Workshop on AddThis.com... Publications Program Publications Technical Publications Educational Publications Newsletter Program Presentations Multimedia Conferences & Meetings Annual Merit Review Proceedings

Note: This page contains sample records for the topic "accommodates two-way flows" 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.


461

Water infiltration and intermittent flow in rough-walled fractures  

DOE Green Energy (OSTI)

Flow visualization experiments were conducted in transparent replicas of natural rough-walled fractures. The fracture was inclined to observe the interplay between capillary and gravity forces. Water was introduced into the fracture by a capillary siphon. Preferential flow paths were observed, where intermittent flow frequently occurred. The water infiltration experiments suggest that intermittent flow in fractures appears to be the rule rather than the exception. In order to investigate the mechanism causing intermittent flow in fractures, parallel plates with different apertures were assembled using lucite and glass. A medium-coarse-fine pore structure is believed to cause the intermittency in flow. Intermittent flow was successfully produced in the parallel plate experiments using the lucite plates. After several trials, intermittent flow was also produced in the glass plates.

Su, G.

1995-05-01T23:59:59.000Z

462

Onset Mechanism of Strain-Rate-Induced Flow Stress Upturn  

E-Print Network (OSTI)

The strain-rate response of flow stress in a plastically deforming crystal is formulated through a stress-sensitive dislocation mobility model that can be evaluated by atomistic simulation. For the flow stress of a model ...

Fan, Yue

463

Physical Modeling of Flow Field inside Urban Street Canyons  

Science Conference Proceedings (OSTI)

The flow characteristics inside urban street canyons were studied in a laboratory water channel. The approaching flow direction was horizontal and perpendicular to the street axis. The street width was adjusted to form street canyons of aspect ...

Xian-Xiang Li; Dennis Y. C. Leung; Chun-Ho Liu; K. M. Lam

2008-07-01T23:59:59.000Z

464

DRAFT STAFF PAPER EXPECTED PATH 26 POWER FLOWS  

E-Print Network (OSTI)

under varying temperature conditions. Keywords: Electricity, demand, imports, transmission flows Marshall, Marc Pryor, David Vidaver Electricity Analysis Office Electricity Supply Assessment Division a 2008 staff assessment of electricity flows over Path 26 during heat spells in the summers of 2006

465

Inhomogeneity of fluid flow in Stirling engine regenerators  

SciTech Connect

The literature relating to inhomogeneity of flow regenerators is briefly reviewed. It is noted that, in contrast to other applications of regenerators, relatively little attention has been paid to the consequences of flow inhomogeneity for thermal regeneration in Stirling cycle machines. The construction of regenerator capsules for a large stationary Stirling engine is described. A test rig is developed to measure the gas velocity profile across the face of the packed regenerator capsules under steady flow conditions. Measured flow profiles for a number of different matrix materials and construction techniques are presented, and it is noted that stacked-mesh regenerator matrices tend to display marked inhomogeneities of flow. The consequences of flow inhomogeneity for flow friction and regenerator effectiveness are analyzed theoretically, and approximate formulae deduced. One method for reducing flow inhomogeneity in stacked-screen matrice

Jones, J.D. (School of Engineering Science, Simon Fraser Univ. Burnaby, British Columbia (CA))

1989-10-01T23:59:59.000Z

466

Triaxial thermopile array geo-heat-flow sensor  

DOE Patents (OSTI)

A triaxial thermopile array geothermal heat flow sensor is designed to measure heat flow in three dimensions in a reconstituted or unperturbed subsurface regime. Heat flow can be measured in conductive or permeable convective media. The sensor may be encased in protective pvc tubing and includes a plurality of thermistors and an array of heat flow transducers produce voltage proportional to heat flux along the subsurface regime and permit direct measurement of heat flow in the subsurface regime. The presence of the thermistor array permits a comparison to be made between the heat flow estimates obtained from the transducers and heat flow calculated using temperature differences and Fourier`s Law. The device is extremely sensitive with an accuracy of less than 0.1 Heat Flow Units (HFU) and may be used for long term readings. 6 figs.

Carrigan, C.R.; Hardee, H.C.; Reynolds, G.D.; Steinfort, T.D.

1990-12-31T23:59:59.000Z

467

Triaxial thermopile array geo-heat-flow sensor  

DOE Patents (OSTI)

A triaxial thermopile array geothermal heat flow sensor is designed to measure heat flow in three dimensions in a reconstituted or unperturbed subsurface regime. Heat flow can be measured in conductive or permeable convective media. The sensor may be encased in protective pvc tubing and includes a plurality of thermistors and an array of heat flow transducers produce voltage proportional to heat flux along the subsurface regime and permit direct measurement of heat flow in the subsurface regime. The presence of the thermistor array permits a comparison to be made between the heat flow estimates obtained from the transducers and heat flow calculated using temperature differences and Fourier's Law. The device is extremely sensitive with an accuracy of less than 0.1 Heat Flow Units (HFU) and may be used for long term readings. 6 figs.

Carrigan, C.R.; Hardee, H.C.; Reynolds, G.D.; Steinfort, T.D.

1990-01-01T23:59:59.000Z

468

Triaxial thermopile array geo-heat-flow sensor  

DOE Patents (OSTI)

A triaxial thermopile array geothermal heat flow sensor is designed to measure heat flow in three dimensions in a reconstituted or unperturbed subsurface regime. Heat flow can be measured in conductive or permeable convective media. The sensor may be encased in protective pvc tubing and includes a plurality of thermistors and an array of heat flow transducers arranged in a vertical string. The transducers produce voltage proportional to heat flux along the subsurface regime and permit direct measurement of heat flow in the subsurface regime. The presence of the thermistor array permits a comparison to be made between the heat flow estimates obtained from the transducers and heat flow calculated using temperature differences and Fourier's Law. The device is extremely sensitive with an accuracy of less than 0.1 Heat Flow Units (HFU) and may be used for long term readings.

Carrigan, Charles R. (Tracy, CA); Hardee, Harry C. (Albuquerque, NM); Reynolds, Gerald D. (Tijeras, NM); Steinfort, Terry D. (Tijeras, NM)

1992-01-01T23:59:59.000Z

469

ParFlow User's Manual Reed M. Maxwell1  

E-Print Network (OSTI)

.5.1 Introduction to the ParFlow TCL commands (PFTCL) . . . . . . . . . . . 14 3.5.2 PFTCL Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 3.5.3 Common examples using ParFlow TCL commands (PFTCL) . . . . . . . . 21 3.6 Directory of Test

470

Momentum and scalar transport in vegetated shear flows  

E-Print Network (OSTI)

Environmental aquatic flows are seldom free of vegetative influence. However, the impact of submerged vegetation on the hydrodynamics and mixing processes in aquatic flows remains poorly understood. In this thesis, I present ...

Ghisalberti, Marco (Marco Andrea), 1976-

2005-01-01T23:59:59.000Z

471

Production and Flow of Identified Hadrons at RHIC  

E-Print Network (OSTI)

We review the production and flow of identified hadrons at RHIC with a main emphasis on the intermediate transverse momentum region ($2production and resolve the anomalously large baryon yields and elliptic flow observed in the experiments.

Julia Velkovska

2004-11-18T23:59:59.000Z

472

Fuel Cell Technologies Office: Flow Cells for Energy Storage...  

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

Flow Cells for Energy Storage Workshop The U.S. Department of Energy's (DOE) Lawrence Berkeley National Laboratory (LBNL) held a Flow Cells for Energy Storage Workshop on March...

473

A Study of Barotropic Model Flows: Intermittency, Waves and Predictability  

Science Conference Proceedings (OSTI)

The régime flows corresponding to the barotropic nondivergent equation with forcing, drag and subgrid-scale dissipation are studied using spectral model on the plane and on the sphere. The flow régimes obtained exhibit clear evidence of the ...

C. Basdevant; B. Legras; R. Sadourny; M. Béland

1981-11-01T23:59:59.000Z

474

Safe and Efficient Tetrazole Synthesis in a Continuous Flow Microreactor  

E-Print Network (OSTI)

Safer flow: The synthesis of 5-substituted tetrazoles in flow (see scheme) is safe, efficient, scalable, requires no metal promoter, and uses a near-equimolar amount of NaN[subscript 3], yet nonetheless displays a broad ...

Palde, Prakash B.

475

Smoke Flow Visualization in a Tributary of a Deep Valley  

Science Conference Proceedings (OSTI)

Smoke pot and oil fog smoke tracers have been used to plan meteorological instrument placement and quantitatively estimate air volume flow from a tributary during nocturnal drainage wind conditions. The estimated volume flow agrees well with ...

W. M. Porch; S. Barr; W. E. Clements; J. A. Archuleta; A. B. Fernandez; C. W. King; W. D. Neff; R. P. Hosker

1989-01-01T23:59:59.000Z

476

Heat Flow-Thermodynamic Depth Complexity in Networks  

Science Conference Proceedings (OSTI)

In this paper we establish a formal link between network complexity in terms of Birkhoff-von Newmann decompositions and heat flow complexity (in terms of quantifying the heat flowing through the network at a given inverse temperature). Furthermore, we ...

Francisco Escolano; Miguel A. Lozano; Edwin R. Hancock

2010-08-01T23:59:59.000Z

477

Property:FirstWellFlowComments | Open Energy Information  

Open Energy Info (EERE)

Jump to: navigation, search Property Name FirstWellFlowComments Property Type String Pages using the property "FirstWellFlowComments" Showing 1 page using this property. C...

478

Secondary Flow and Upstream Dynamics in Double Bifurcation Model  

E-Print Network (OSTI)

Flow behavior in bifurcation models is of great importance to health risk assessments and pulmonary drug delivery. This is particularly true of secondary flow behavior in multi-bifurcation models. Previously, both numerical ...

Leong, Fong Yew

479

Bubble-induced damping in displacement-driven microfluidic flows  

E-Print Network (OSTI)

Bubble damping in displacement-driven microfluidic flows was theoretically and experimentally investigated for a Y-channel microfluidic network. The system was found to exhibit linear behavior for typical microfluidic flow ...

Lee, Jongho

480

Wavenumber Selection and Hysteresis in Nonlinear Baroclinic Flows  

Science Conference Proceedings (OSTI)

Wavenumber transition and hysteresis in a highly unstable baroclinic flow are investigated using a high-resolution spectral numerical model. As the flow becomes more supercritical, the dominant wave gradually shifts from the most unstable wave ...

Shin-Hung Chou

1995-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "accommodates two-way flows" 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

Continuous Flow Coupling and Decarboxylation Reactions Promoted by Copper Tubing  

E-Print Network (OSTI)

A convenient and efficient flow method for Ullmann condensations, Sonogashira couplings, and decarboxylation reactions using a commercially available copper tube flow reactor (CTFR) is described. The heated CTFR effects ...

Zhang, Yun

482

Nonlinear dynamics of three dimensional fluid flow separation  

E-Print Network (OSTI)

Flow separation (the detachment of fluid from a no-slip boundary) is a major cause of performance loss in engineering devices, including diffusers, airfoils and jet engines. The systematic study of flow separation dates ...

Surana, Amit

2007-01-01T23:59:59.000Z

483

Instability of Baroclinic Tidal Flow in a Stratified Fjord  

Science Conference Proceedings (OSTI)

The Taylor–Goldstein equation is used to investigate the stability of a baroclinic tidal flow observed in a stratified fjord. The flow is analyzed at hourly intervals when turbulent dissipation measurements were made. The critical gradient ...

Zhiyu Liu

2010-01-01T23:59:59.000Z

484

Incompressible and Anelastic Flow Simulations on Numerically Generated Grids  

Science Conference Proceedings (OSTI)

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

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

1988-05-01T23:59:59.000Z

485

Large Amplitude Flow Anomalies in Northern Hemisphere Midlatitudes  

Science Conference Proceedings (OSTI)

The composite of large amplitude flow anomalies identified from extremely large amplitudes of the planetary-scale waves is examined in terms of the temporal and spatial evolution of both the large-scale flow and the storm tracks. The ...

Anthony R. Hansen; Alfonso Sutera

1995-06-01T23:59:59.000Z

486

Triaxial thermopile array geo-heat-flow sensor  

DOE Green Energy (OSTI)

A triaxial thermopile array geothermal heat flow sensor is designed to measure heat flow in three dimensions in a reconstituted or unperturbed subsurface regime. Heat flow can be measured in conductive or permeable convective media. The sensor may be encased in protective pvc tubing and includes a plurality of thermistors and an array of heat flow transducers produce voltage proportional to heat flux along the subsurface regime and permit direct measurement of heat flow in the subsurface regime. The presence of the thermistor array permits a comparison to be made between the heat flow estimates obtained from the transducers and heat flow calculated using temperature differences and Fourier's Law. The device is extremely sensitive with an accuracy of less than 0.1 Heat Flow Units (HFU) and may be used for long term readings. 6 figs.

Carrigan, C.R.; Hardee, H.C.; Reynolds, G.D.; Steinfort, T.D.

1990-01-01T23:59:59.000Z

487

Engineered and Natural Marine Seep, Bubble-Driven Buoyancy Flows  

Science Conference Proceedings (OSTI)

Bubble-plume upwelling flows were studied in the marine environment through dye releases into engineered plumes and a natural hydrocarbon seep plume. For engineered plumes, these experiments measured the water column–averaged upwelling flow Vup(z...

Ira Leifer; Henrik Jeuthe; Svein Helge Gjøsund; Vegar Johansen

2009-12-01T23:59:59.000Z

488

Active control of tip clearance flow in axial compressors  

E-Print Network (OSTI)

Control of compressor tip clearance flows is explored in a linear cascade using three types of fluidic actuators; Normal Synthetic Jet (NSJ; unsteady jet normal to the mean flow with zero net mass flux), Directed Synthetic ...

Bae, Jinwoo W

2001-01-01T23:59:59.000Z

489

Method and apparatus for monitoring two-phase flow. [PWR  

DOE Patents (OSTI)

A method and apparatus for monitoring two-phase flow is provided that is particularly related to the monitoring of transient two-phase (liquid-vapor) flow rates such as may occur during a pressurized water reactor core blow-down. The present invention essentially comprises the use of flanged wire screens or similar devices, such as perforated plates, to produce certain desirable effects in the flow regime for monitoring purposes. One desirable effect is a measurable and reproducible pressure drop across the screen. The pressure drop can be characterized for various known flow rates and then used to monitor nonhomogeneous flow regimes. Another useful effect of the use of screens or plates in nonhomogeneous flow is that such apparatus tends to create a uniformly dispersed flow regime in the immediate downstream vicinity. This is a desirable effect because it usually increases the accuracy of flow rate measurements determined by conventional methods.

Sheppard, J.D.; Tong, L.S.

1975-12-19T23:59:59.000Z

490

Pseudomomentum Diagnostics for Two-Dimensional Stratified Compressible Flow  

Science Conference Proceedings (OSTI)

Expressions are derived for the local pseudomomentum density in two-dimensional compressible stratified flow and are compared with the expressions for pseudomomentum in two-dimensional Boussinesq and anelastic flow derived by Shepherd and by ...

Dale R. Durran

1995-11-01T23:59:59.000Z

491

Collision Rates of Cloud Droplets in Turbulent Flow  

Science Conference Proceedings (OSTI)

Direct numerical simulations of an evolving turbulent flow field have been performed to explore how turbulence affects the motion and collisions of cloud droplets. Large numbers of droplets are tracked through the flow field and their positions, ...

Charmaine N. Franklin; Paul A. Vaillancourt; M. K. Yau; Peter Bartello

2005-07-01T23:59:59.000Z

492

Smart Grid Conceptual Actors/Data Flow Diagram- Cross Domain...  

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

Smart Grid Conceptual ActorsData Flow Diagram- Cross Domain Network Focued- Open SGSG-Network TF Smart Grid Conceptual ActorsData Flow Diagram- Cross Domain Network Focued- Open...

493

Method of fabricating a flow device  

DOE Patents (OSTI)

This invention is a novel method for fabricating leak-tight tubular articles which have an interior flow channel whose contour must conform very closely with design specifications but which are composed of metal which tends to warp if welded. The method comprises designing two longitudinal half-sections of the article, the half-sections being contoured internally to cooperatively form the desired flow passageway. Each half-section is designed with a pair of opposed side flanges extending between the end flanges and integral therewith. The half-sections are positioned with their various flanges in confronting relation and with elongated metal gaskets extending between the confronting flanges for the length of the array. The gaskets are a deformable metal which is fusion-weldable to the end flanges. The mating side flanges are joined mechanically to deform the gaskets and provide a longitudinally sealed assembly. The portions of the end flanges contiguous with the ends of the gaskets then are welded to provide localized end welds which incorporate ends of the gaskets, thus transversely sealing the assembly. This method of fabrication provides leak-tight articles having the desired precisely contoured flow channels, whereas various conventional methods have been found unsatisfactory.

Hale, Robert L. (Kingston, TN)

1978-01-01T23:59:59.000Z

494

Review of air flow measurement techniques  

SciTech Connect

Airflow measurement techniques are necessary to determine the most basic of indoor air quality questions: ''Is there enough fresh air to provide a healthy environment for the occupants of the building?'' This paper outlines airflow measurement techniques, but it does not make recommendations for techniques that should be used. The airflows that will be discussed are those within a room or zone, those between rooms or zones, such as through doorways (open or closed) or passive vents, those between the building and outdoors, and those through mechanical air distribution systems. Techniques that are highlighted include particle streak velocimetry, hot wire anemometry, fan pressurization (measuring flow at a given pressure), tracer gas, acoustic methods for leak size determination, the Delta Q test to determine duct leakage flows, and flow hood measurements. Because tracer gas techniques are widely used to measure airflow, this topic is broken down into sections as follows: decay, pulse injection, constant injection, constant concentration, passive sampling, and single and multiple gas measurements for multiple zones.

McWilliams, Jennifer

2002-12-01T23:59:59.000Z

495

Flow Patterns Around a Complex Building  

DOE Green Energy (OSTI)

The authors compare the results of a computer simulated flow field around building 170 (B170) at Lawrence Livermore National Laboratory (LLNL) with field measurements. In order to aid in the setup of the field experiments, the simulations were performed first. B170 was chosen because of its architectural complexity and because a relatively simple fetch exists upwind (a field lies southwest of the site). Figure 1 shows a computational model of the building which retains the major architectural features of the real building (e.g., courtyard, alcoves, and a multi-level roof). Several important characteristics of the cases presented here are: (1) the flow was assumed neutral and no heat flux was imposed at the ground, representing cloudy or morning conditions, (2) a simple canopy parameterization was used to model the effect of a large row of eucalyptus trees which is located to the northeast of the building, (3) the wind directions studied were 200, 225, 250 degrees measured clockwise from true north (the prevailing winds at LLNL are from the southwest in the summer), (4) the incoming wind profile was modeled as logarithmic with a maximum of about 3 meters per second. In addition, note that the building is rotated counterclockwise by 25 degrees with respect to the east/west axis. For convenience, the flow is modeled in a coordinate system that has been rotated with the building.

Calhoun, R; Chan, S; Lee, R; Leone, J, Shinn, J; Stevens, D

1999-09-24T23:59:59.000Z

496

Perturbations in high-velocity gas flow  

DOE Green Energy (OSTI)

High velocity explosive products or other low-density gases are often used to accelerate metal plates to high velocities. Perturbations in otherwise uniform flow configurations are sometimes sufficient to cause interactions that can rapidly destroy the integrity of the plates. In this study perturbations were introduced in uniform gas flows of detonated HE products and strongly shocked polyethylene, CH{sub 2}. The primary diagnostics were smear-camera records obtained when these gases impinged on layers of plexiglas separated by small argon-filled gaps. These records show shock-arrival times at various levels and thus determine not only the size of the perturbation but also its strength. Perturbations in HE gases running into H{sub 2} and in CH{sub 2} into H{sub 2} have been studied. Two-dimensional hydrodynamic calculations are in excellent agreement with the experiments, and enable one to study details of the flow not possible from experimental results. 1 ref., 5 figs.

Harvey, W.B.; McQueen, R.G. (Los Alamos National Lab., NM (USA))

1989-01-01T23:59:59.000Z

497

Clustering of Aerosols in Atmospheric Turbulent Flow  

E-Print Network (OSTI)

A mechanism of formation of small-scale inhomogeneities in spatial distributions of aerosols and droplets associated with clustering instability in the atmospheric turbulent flow is discussed. The particle clustering is a consequence of a spontaneous breakdown of their homogeneous space distribution due to the clustering instability, and is caused by a combined effect of the particle inertia and a finite correlation time of the turbulent velocity field. In this paper a theoretical approach proposed in Phys. Rev. E 66, 036302 (2002) is further developed and applied to investigate the mechanisms of formation of small-scale aerosol inhomogeneities in the atmospheric turbulent flow. The theory of the particle clustering instability is extended to the case when the particle Stokes time is larger than the Kolmogorov time scale, but is much smaller than the correlation time at the integral scale of turbulence. We determined the criterion of the clustering instability for the Stokes number larger than 1. We discussed applications of the analyzed effects to the dynamics of aerosols and droplets in the atmospheric turbulent flow.

T. Elperin; N. Kleeorin; M. A. Liberman; V. L'vov; I. Rogachevskii

2007-02-15T23:59:59.000Z

498

EPRI Coal Flow Loop: Evaluation of Extractive Methods  

Science Conference Proceedings (OSTI)

Extractive coal sampling methodologies are currently the principal method to estimate the flow of pulverized coal on the individual conveying lines of power boilers. The measurement uncertainty associated with the common methodologies is not well known. Parameters suspected to influence these types of measurement — such as distance from flow disturbances, flow regime, and air-to-coal ratio, among others — are difficult to control at a power plant. The Coal Flow Control and Measurement Laborat...

2005-03-24T23:59:59.000Z

499

Directed and elliptic flow in Au + Au at intermediate energies  

E-Print Network (OSTI)

Directed and elliptic flow for the Au + Au system at incident energies between 40 and 150 MeV per nucleon has been measured using the INDRA 4 pi multi-detector. For semi-central collisions, the elliptic flow of Z directed flow changes sign at a bombarding energy between 50 and 60 MeV per nucleon and remains negative at lower energies. The conditions for the appearance and possible origins of negative flow are discussed.

J. Lukasik; G. Auger; M. L. Begemann-Blaich; N. Bellaize; R. Bittiger; F. Bocage; B. Borderie; R. Bougault; B. Bouriquet; J. L. Charvet; A. Chbihi; R. Dayras; D. Durand; J. D. Frankland; E. Galichet; D. Gourio; D. Guinet; S. Hudan; P. Lautesse; F. Lavaud; A. Le Fevre; R. Legrain; O. Lopez; U. Lynen; W. F. J. Mueller; L. Nalpas; H. Orth; E. Plagnol; E. Rosato; A. Saija; C. Schwarz; C. Sfienti; B. Tamain; W. Trautmann; A. Trzcinski; K. Turzo; E. Vient; M. Vigilante; C. Volant; B. Zwieglinski

2004-10-20T23:59:59.000Z

500

Two-dimensional Ricci flow as a stochastic process  

E-Print Network (OSTI)

We prove that, for a two-dimensional Riemannian manifold, the Ricci flow is obtained by a Wiener process.

Marco Frasca

2009-01-29T23:59:59.000Z