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A Wireless Fluid-Level Measurement Technique

A Wireless Fluid-Level Measurement Technique

This paper presents the application of a recently developed wireless measurement acquisition system to fluid-level measurement. This type of fluid-level measurement system alleviates many shortcomings of fluid-level measurement methods currently being used, including limited applicability of any one fluid-level sensor design. Measurement acquisition shortcomings include the necessity for power to be supplied to each sensor and for the measurement to be extracted from each sensor via a physical connection..

DKK 130.95
1

Cryogenic Fluid Storage Technology Development - Recent and Planned Efforts at NASA - Matthew E Moran

Cryogenic Fluid Storage Technology Development - Recent and Planned Efforts at NASA - Matthew E Moran

Recent technology development work conducted at NASA in the area of Cryogenic Fluid Management (CFM) storage is highlighted, including summary results, key impacts, and ongoing efforts. Thermodynamic vent system (TVS) ground test results are shown for hydrogen, methane, and oxygen. Joule-Thomson (J-T) device tests related to clogging in hydrogen are summarized, along with the absence of clogging in oxygen and methane tests. Confirmation of analytical relations and bonding techniques for broad area..

DKK 129.95
1

Numerical, Analytical, Experimental Study of Fluid Dynamic Forces in Seals Volume 6 - Description of Scientific Cfd Code Sciseal - Mahesh Athavale

Numerical, Analytical, Experimental Study of Fluid Dynamic Forces in Seals Volume 6 - Description of Scientific Cfd Code Sciseal - Mahesh Athavale

The objectives of the program were to develop computational fluid dynamics (CFD) codes and simpler industrial codes for analyzing and designing advanced seals for air-breathing and space propulsion engines. The CFD code SCISEAL is capable of producing full three-dimensional flow field information for a variety of cylindrical configurations. An implicit multidomain capability allow the division of complex flow domains to allow optimum use of computational cells. SCISEAL also has the unique capability..

DKK 185.95
1

Numerical, Analytical, Experimental Study of Fluid Dynamic Forces in Seals - Volume 2; Description of Gas Seal Codes Gcylt and Gface - Anita D Liang

Numerical, Analytical, Experimental Study of Fluid Dynamic Forces in Seals - Volume 2; Description of Gas Seal Codes Gcylt and Gface - Anita D Liang

The objectives of the program were to develop computational fluid dynamics (CFD) codes and simpler industrial codes for analyzing and designing advanced seals for air-breathing and space propulsion engines. The CFD code SCISEAL is capable of producing full three-dimensional flow field information for a variety of cylindrical configurations. An implicit multidomain capability allow the division of complex flow domains to allow optimum use of computational cells. SCISEAL also has the unique capability..

DKK 222.95
1

Analytic Modeling of the Hydrodynamic, Thermal, and Structural Behavior of Foil Thrust Bearings - Robert J Bruckner

Analytic Modeling of the Hydrodynamic, Thermal, and Structural Behavior of Foil Thrust Bearings - Robert J Bruckner

A simulation and modeling effort is conducted on gas foil thrust bearings. A foil bearing is a self acting hydrodynamic device capable of separating stationary and rotating components of rotating machinery by a film of air or other gaseous lubricant. Although simple in appearance these bearings have proven to be complicated devices in analysis. They are sensitive to fluid structure interaction, use a compressible gas as a lubricant, may not be in the fully continuum range of fluid mechanics, and..

DKK 149.95
1

Physical Laws for Mechanobiology

Physical Laws for Mechanobiology

Higher-level physical laws applicable to biological tissues are presented that will permit the modeling of metabolic activity at the cellular level, including variations in the mass of a tissue. Here the tissue is represented as a fluid/solid mixture, wherein molecular solutes transport within the fluid, and cells can migrate throughout the porous solid. Variations in mass can arise via exchanges in mass between the constituent phases within a control volume such that mass is conserved in the tissue..

DKK 159.95
1

Lecture Series Boundary Layer Theory Part I - Laminar Flow

Lecture Series Boundary Layer Theory Part I - Laminar Flow

In the lecture series starting today author want to give a survey of a field of aerodynamics which has for a number of years been attracting an ever growing interest. The subject is the theory of flows with friction, and, within that field, particularly the theory of friction layers, or boundary layers. A great many considerations of aerodynamics are based on the ideal fluid, that is the frictionless incompressibility and fluid. By neglect of compressibility and friction the extensive mathematical..

DKK 234.95
1

Guideline for Fluid Modeling of Atmospheric Diffusion

Guideline for Fluid Modeling of Atmospheric Diffusion

The U.S. Environmental Protection Agency (EPA) was introduced on December 2, 1970 by President Richard Nixon. The agency is charged with protecting human health and the environment, by writing and enforcing regulations based on laws passed by Congress. The EPA's struggle to protect health and the environment is seen through each of its official publications. These publications outline new policies, detail problems with enforcing laws, document the need for new legislation, and describe new tactics..

DKK 255.95
1

Dairy Industry - Information on Marketing Channels and Prices for Fluid Milk

Dairy Industry - Information on Marketing Channels and Prices for Fluid Milk

The BiblioGov Project is an effort to expand awareness of the public documents and records of the U.S. Government via print publications. In broadening the public understanding of government and its work, an enlightened democracy can grow and prosper. Ranging from historic Congressional Bills to the most recent Budget of the United States Government, the BiblioGov Project spans a wealth of government information. These works are now made available through an environmentally friendly, print-on-demand..

DKK 180.95
1

EPA Drilling Fluid Hazard Assessment Research Program - Index and Abstracts to Publications

EPA Drilling Fluid Hazard Assessment Research Program - Index and Abstracts to Publications

The U.S. Environmental Protection Agency (EPA) was introduced on December 2, 1970 by President Richard Nixon. The agency is charged with protecting human health and the environment, by writing and enforcing regulations based on laws passed by Congress. The EPA's struggle to protect health and the environment is seen through each of its official publications. These publications outline new policies, detail problems with enforcing laws, document the need for new legislation, and describe new tactics..

DKK 202.95
1

Technology Activities in the Aerodynamics and Hydrodynamics of Propulsion Elements at Msfc - Roberto García

Technology Activities in the Aerodynamics and Hydrodynamics of Propulsion Elements at Msfc - Roberto García

This presentation discusses the work towards a second generation reusable launch vehicle (RLV). The goals of the second generation RLV program are reviewed. These include cost, safety, and propulsion advances. The Fluid dynamics technologies under development are discussed. These include the altitude compensating nozzle technology, the Aerospike plume induced base heating, the inducer testing technology. Pictures of altitude compensating nozzles Aerospike Plume Induced Base Heating results and Inducer..

DKK 158.95
1

Nutritional Biochemistry - Scott M Smith

Nutritional Biochemistry - Scott M Smith

This slide presentation reviews some of the effects that space flight has on humans nutritional biochemistry. Particular attention is devoted to the study of protein breakdown, inflammation, hypercatabolism, omega 3 fatty acids, vitamin D, calcium, urine, folate and nutrient stability of certain vitamins, the fluid shift and renal stone risk, acidosis, iron/hematology, and the effects on bone of dietary protein, potassium. inflammation, and omega-3 fatty acids

DKK 149.95
1

Mathematical Metaphors - Problem Reformulation and Analysis Strategies - David E Thompson

Mathematical Metaphors - Problem Reformulation and Analysis Strategies - David E Thompson

This paper addresses the critical need for the development of intelligent or assisting software tools for the scientist who is working in the initial problem formulation and mathematical model representation stage of research. In particular, examples of that representation in fluid dynamics and instability theory are discussed. The creation of a mathematical model that is ready for application of certain solution strategies requires extensive symbolic manipulation of the original mathematical model...

DKK 130.95
1

Characterizing Hydraulic Properties and Ground-Water Chemistry in Fractured-Rock Aquifers - A User's Manual for the Multifunction Bedrock-Aquifer Tran

Characterizing Hydraulic Properties and Ground-Water Chemistry in Fractured-Rock Aquifers - A User's Manual for the Multifunction Bedrock-Aquifer Tran

A borehole testing apparatus has been designed to isolate discrete intervals of a bedrock borehole and conduct hydraulic tests or collect water samples for geochemical analyses. This borehole testing apparatus, referred to as the Multifunction Bedrock-Aquifer Transportable Testing Tool (BAT3), includes two borehole packers, which when inflated can form a pressure-tight seal against smooth borehole walls; a pump apparatus to withdraw water from between the two packers; a fluid-injection apparatus..

DKK 213.95
1

Pegasus 5 - An Automated Pre-Processor for Overset-Grid Cfd - Norman E Suhs

Pegasus 5 - An Automated Pre-Processor for Overset-Grid Cfd - Norman E Suhs

An all new, automated version of the PEGASUS software has been developed and tested. PEGASUS provides the hole-cutting and connectivity information between overlapping grids, and is used as the final part of the grid generation process for overset-grid computational fluid dynamics approaches. The new PEGASUS code (Version 5) has many new features: automated hole cutting; a projection scheme for fixing gaps in overset surfaces; more efficient interpolation search methods using an alternating digital..

DKK 130.95
1

Airshow 1.0 Cfd Software Users' Guide - Stanley R Mohler

Airshow 1.0 Cfd Software Users' Guide - Stanley R Mohler

AirShow is visualization post-processing software for Computational Fluid Dynamics (CFD). Upon reading binary PLOT3D grid and solution files into AirShow, the engineer can quickly see how hundreds of complex 3-D structured blocks are arranged and numbered. Additionally, chosen grid planes can be displayed and colored according to various aerodynamic flow quantities such as Mach number and pressure. The user may interactively rotate and translate the graphical objects using the mouse. The software..

DKK 159.95
1

Cfd Analysis of 1/7th Scale Steam Generator Inlet Plenum Mixing During a Pwr Severe Accident - Nureg-1781

Cfd Analysis of 1/7th Scale Steam Generator Inlet Plenum Mixing During a Pwr Severe Accident - Nureg-1781

Computational fluid dynamics (CFD) is used to predict steam generator inlet plenum mixing during a severe accident scenario in a pressurized water reactor. Comparisons are made to 1/7th scale data. Qualitatively, the code predicts the experimental flow patterns and mixing phenomena. Quantitatively, comparisons are made with key temperatures, mass flows, and mixing parameters. The best estimate prediction is generally within 5% of the reported values. Key temperature predictions are within a few degrees..

DKK 179.95
1

Axial and Centrifugal Compressor Mean Line Flow Analysis Method

Axial and Centrifugal Compressor Mean Line Flow Analysis Method

This paper describes a method to estimate key aerodynamic parameters of single and multistage axial and centrifugal compressors. This mean-line compressor code COMDES provides the capability of sizing single and multistage compressors quickly during the conceptual design process. Based on the compressible fluid flow equations and the Euler equation, the code can estimate rotor inlet and exit blade angles when run in the design mode. The design point rotor efficiency and stator losses are inputs to..

DKK 159.95
1

Textbook Multigrid Efficiency for Leading Edge Stagnation - Boris Diskin

Textbook Multigrid Efficiency for Leading Edge Stagnation - Boris Diskin

A multigrid solver is defined as having textbook multigrid efficiency (TME) if the solutions to the governing system of equations are attained in a computational work which is a small (less than 10) multiple of the operation count in evaluating the discrete residuals. TME in solving the incompressible inviscid fluid equations is demonstrated for leading-edge stagnation flows. The contributions of this paper include (1) a special formulation of the boundary conditions near stagnation allowing convergence..

DKK 178.95
1

Wind-Us Unstructured Flow Solutions for a Transonic Diffuser - Stanley R Mohler

Wind-Us Unstructured Flow Solutions for a Transonic Diffuser - Stanley R Mohler

The Wind-US Computational Fluid Dynamics flow solver computed flow solutions for a transonic diffusing duct. The calculations used an unstructured (hexahedral) grid. The Spalart-Allmaras turbulence model was used. Static pressures along the upper and lower wall agreed well with experiment, as did velocity profiles. The effect of the smoothing input parameters on convergence and solution accuracy was investigated. The meaning and proper use of these parameters are discussed for the benefit of Wind-US..

DKK 234.00
1

Geologic Criteria for the Assessment of Sedimentary Exhalative (Sedex) Zn-PB-AG Deposits - Open-File Report 2009-1209 - Poul Emsbo

Geologic Criteria for the Assessment of Sedimentary Exhalative (Sedex) Zn-PB-AG Deposits - Open-File Report 2009-1209 - Poul Emsbo

Sedex deposits account for more than 50 percent of the world's zinc and lead reserves and furnish more than 25 percent of the world's production of these two metals. This report draws on previous syntheses as well as on topical studies of deposits in sedex basins to determine the characteristics and processes that produced sedex deposits. This analysis also uses studies of the tectonic, sedimentary, and fluid evolution of modern and ancient sedimentary basins and mass balance constraints to identify..

DKK 158.95
1

Boundary Layer Theory - Part 2 Turbulent Flows

Boundary Layer Theory - Part 2 Turbulent Flows

The flow laws of the actual flows at high Reynolds numbers differ considerably from those of the laminar flows treated in the preceding part. These actual flows show a special characteristic, denoted as turbulence. The character of a turbulent flow is most easily understood the case of the pipe flow. Consider the flow through a straight pipe of circular cross section and with a smooth wall. For laminar flow each fluid particle moves with uniform velocity along a rectilinear path. Because of viscosity,..

DKK 214.95
1

Construction and Utilization of a Beowulf Computing Cluster - A User's Perspective

Construction and Utilization of a Beowulf Computing Cluster - A User's Perspective

Lockheed Martin Space Operations - Stennis Programs (LMSO) at the John C Stennis Space Center (NASA/SSC) has designed and built a Beowulf computer cluster which is owned by NASA/SSC and operated by LMSO. The design and construction of the cluster are detailed in this paper. The cluster is currently used for Computational Fluid Dynamics (CFD) simulations. The CFD codes in use and their applications are discussed. Examples of some of the work are also presented. Performance benchmark studies have been..

DKK 160.95
1

An Unsteady Long Bearing Squeeze Film Damper Model, Part 1 - Circular Centered Orbits - P a Schallhorn

An Unsteady Long Bearing Squeeze Film Damper Model, Part 1 - Circular Centered Orbits - P a Schallhorn

This paper, the first of a two-part series, presents results of an unsteady rotordynamic analysis of a long-bearing squeeze film damper executing circular centered orbits using a fluid circuit approach. A series of nodes and branches represent the geometry of the flow circuit. The mass and momentum conservation equations are solved to predict the pressure distribution in the squeeze film. The motion of the bearing is simulated by the variation of geometry within the flow path. The modeling methodology..

DKK 159.95
1