Index Catalog // ScholarsArchive@OSU

Design and testing of intrusive conductivity probes for the measurement of two-phase flow parameters

Creator:: McCreary, David M.
Abstract:: This thesis examines two techniques for measuring two-phase flow parameters in an air/water system using intrusive conductivity probes. Specifically, the theoretical derivation for measuring void fraction and interfacial area using a two-sensor needle-type probe is derived, and a statistical analysis of the accuracy using the two-sensor probe for measuring interfacial...
Resource Type:: Masters Thesis
Full Text:: measurement of two-phase flow parameters AN ABSTRACT OF THE THESIS OF David M. McCreary for the degree of

Axial development of two-phase flow parameters in a vertical column

Creator:: Abel, Kent C.
Abstract:: The next generation of nuclear safety analysis computer codes will include detailed modeling of the interfacial area concentration. The interfacial area concentration is the essence of the two-fluid model. It is the most accurate of the two-phase models since it considers each phase independently and links the two phases together...
Resource Type:: Masters Thesis
Full Text:: two-fluid model. With proper characterization of two-phase flow, the next generation of nuclear

Viscosity of liquid - liquid dispersions in laminar and turbulent flow

Creator:: John Anthony Cengel
Resource Type:: Masters Thesis

Motion picture study of a vertical climbing film in an annular duct

Creator:: Scott, Bruce Douglas
Abstract:: This paper describes a study of two-phase gas-liquid vertical annular climbing film flow. Using a high speed Fastax movie camera, motion was slowed sufficiently to facilitate detailed analysis of the climbing film structure, based on single frame projections. The dynamic characteristics of the liquid film could likewise be obtained, though...
Resource Type:: Masters Thesis
Full Text:: CLIMBING FILM IN AN ANNULAR DUCT INTRODUCTION Two-phase gas-liquid flow can be broken down into several

Phase distribution parameter determination by neutron radiography

Creator:: Skinner, Jesse B.
Abstract:: A phase distribution parameter has been added to the one-dimensional two-phase horizontal flow conservation equations. The phase distribution parameter was incorporated into the conservation equations in an attempt to add stability and remove correlation switching by incorporating gravity. Determination of the phase distribution parameter requires an average void fraction profile...
Resource Type:: Masters Thesis
Full Text:: A phase distribution parameter has been added to the one-dimensional two-phase horizontal flow

Microscale thermal management utilizing vapor extraction from a fractal-like branching heat sink

Creator:: Apreotesi, Mario A.
Abstract:: It is hypothesized that increases in pressure drop due to vapor generation during boiling in microchannels can be reduced by extraction of vapor at its point of inception. Ultimately, this local vapor extraction decreases the pressure drop required to drive the flow through a fractal-like branching, microchannel flow network within...
Resource Type:: Masters Thesis
Full Text:: ................................................................................. 100 LIST OF FIGURES Figure Page 2.1 Typical two-phase flow patterns in horizontal

The experimental characterization of membrane behavior in two-phase gas extraction

Creator:: Cappello, Nicholas C.
Abstract:: Understanding the behavior of hydrophobic membranes is important for applications where separating a gas from a liquid-gas mixture is beneficial. For example, in-situ vapor extraction can be used in microscale heat sinks to improve heat transfer and flow stability. In this study, gas is experimentally evaluated flowing through flexible polytetrafluoroethylene...
Resource Type:: Masters Thesis
Full Text:: insufficient to predict gas extraction flow rates from two-phase mixtures, even when accounting for membrane

Modeling convective boiling flow with in-situ local vapor extraction

Creator:: Salakij, Saran
Abstract:: The pressure drop of convective boiling flow may be reduced by extracting vapor locally since the entire generated vapor does not have to travel through the entire channel length. In this study, the theoretical model was developed to simulate a convective boiling flow through a fractal-like branching microchannel network with...
Resource Type:: Masters Thesis
Full Text:: 2 Literature review 3 2.1 Fractal-like branching flow geometry 3 2.2 Two-phase pressure drop

Numerical study of flow maldistribution in microchannels using fully resolved simulation

Creator:: Martin, Mathieu Georges Charles
Abstract:: This thesis addresses numerical simulation of flow maldistribution in microchannels. Microchannels are often associated with two phase-flows which can generate many problems such as plugging the channel or perturbing the flow. In this study we have used CFD and fully resolved technique to simulate what would happen in the case...
Resource Type:: Masters Thesis
Full Text:: to solve the two-phase flow problem is crucial. Since the simulation is dealing with both freely

CFD simulation of single-phase and flow boiling in confined jet impingement with in-situ vapor extraction using two kinds of multiphase models

Creator:: He, Xiaoliang
Abstract:: With continued development of the electronic industry, the demand for highly efficient heat removal solutions requires innovative cooling technologies. A computational fluid dynamic (CFD) study, including heat transfer, is performed for an axisymmetric, confined jet impingement experiencing boiling and coupled with vapor extraction. Boiling occurs at the target surface while...
Resource Type:: Masters Thesis
Full Text:: negative influence of flow instabilities resulting from two-phase flow within a confined region. A

Two-phase fluid break flow measurements and scaling in the advanced plant experiment (APEX)

Creator:: Pimentel, David Alan
Abstract:: The Oregon State University (OSU) Advanced Plant Experiment (APEX) is a one-fourth height, one-half time scale, reduced pressure integral systems test facility designed to model the long-term cooling capabilities of the emergency core cooling systems of the Westinghouse AP600. This study provides a brief description of the APEX test facility,...
Resource Type:: Masters Thesis
Full Text:: . Title: Two-Phase Fluid Break Flow Measurements and Scaling in the Advanced Plant Experiment (APEX

Experimental investigation of liquid entrainment in a reactor hot-leg with a vertical branch

Creator:: Welter, Kent B.
Abstract:: A literature review of current phase separation publications was conducted. Data sets were collected and compiled into a Two-Phase Flow Separation Database. Examination of this database indicating a need for further investigation into the liquid entertainment phenomena for smaller hot-leg to branch diameters and intermittent flow regimes. A detailed analysis...
Resource Type:: Masters Thesis

Performance and flow stability characteristics in two-phase confined impinging jets

Creator:: Sabo, Michael D.
Abstract:: Advances in electronics fabrication, coupled with the demand for increased computing power, have driven the demand for innovative cooling solutions to dissipate waste heat generated by these devices. To meet future demands, research and development has focused on robust and stable two-phase heat transfer devices. A confined impinging jet is...
Resource Type:: Masters Thesis
Full Text:: and Flow Stability Characteristics in Two-Phase Confined Impinging Jets. Abstract approved: Deborah

Passive pumping in pool and open channel configurations via meso-scale asymmetric surface patterning

Creator:: Strid, Logan
Abstract:: The research presented in this thesis is a continuation of collaboration between Oregon State University and Auburn University studying the feasibility of passively pumping liquid during boiling in a preferential direction using meso-scaled asymmetric surface patterns. Such a passive phase-change mechanism has great potential for thermal management in spacecraft and...
Resource Type:: Masters Thesis
Full Text:: advantage of two-phase heat transfer. Two phase heat transfer has the advantage over single-phase heat

Analyzing the Relationship between Capillary Pressure, Saturation, and Interfacial Area for a Three-Phase Flow System in Porous Media

Creator:: Paustian, Rebecca L.
Abstract:: Multi-phase flow in porous media includes many instances of subsurface flow. Three-phase flow in particular is important in situations of enhanced oil recovery, CO2 sequestration, and groundwater remediation. Many studies have been performed on how two fluid phases (oil/water or air/water) behave in porous media, but very few studies exist...
Resource Type:: Masters Thesis
Full Text:: ............................................................................18 3.2 Two-Phase Flow Experiments

ScholarsArchive@OSU

Design and testing of intrusive conductivity probes for the measurement of two-phase flow parameters

Axial development of two-phase flow parameters in a vertical column

Viscosity of liquid - liquid dispersions in laminar and turbulent flow

Motion picture study of a vertical climbing film in an annular duct

Phase distribution parameter determination by neutron radiography

Microscale thermal management utilizing vapor extraction from a fractal-like branching heat sink

The experimental characterization of membrane behavior in two-phase gas extraction

Modeling convective boiling flow with in-situ local vapor extraction

Numerical study of flow maldistribution in microchannels using fully resolved simulation

CFD simulation of single-phase and flow boiling in confined jet impingement with in-situ vapor extraction using two kinds of multiphase models

Two-phase fluid break flow measurements and scaling in the advanced plant experiment (APEX)

Experimental investigation of liquid entrainment in a reactor hot-leg with a vertical branch

Performance and flow stability characteristics in two-phase confined impinging jets

Passive pumping in pool and open channel configurations via meso-scale asymmetric surface patterning

Analyzing the Relationship between Capillary Pressure, Saturation, and Interfacial Area for a Three-Phase Flow System in Porous Media

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