Index Catalog // ScholarsArchive@OSU

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:: Abstract approved: Vinod Narayanan The research presented in this thesis is a continuation of

Flow boiling of lithium bromide-water solution in microchannels, with application to desorption

Creator:: Fackrell, Kurt
Abstract:: Recent studies of flow boiling within microchannels have shown high heat fluxes, leading to successful design and testing of compact heat exchangers, cooling systems for electronics and other high efficiency, miniature components. An experimental study of flow boiling of a concentrated salt solution in microchannels is presented. Experiments examined flow...
Resource Type:: Masters Thesis
Full Text:: . Abstract Approved: Vinod Narayanan Recent studies of flow boiling within microchannels have shown high

Application of infrared thermography for temperature measurement in microscale internal and external flows

Creator:: Patil, Vishal
Abstract:: Infrared (IR) thermography is applied to estimate heat transfer rates in external and internal microscale convective flows. The technique and analysis are developed in the context of external jet impingement flow and internal single-phase liquid flows. A heated-thin-foil thermography technique is applied to perform surface temperature visualization on a submerged...
Resource Type:: Masters Thesis
Full Text:: I would like to acknowledge my major advisor, Dr. Vinod Narayanan, for all his support, motivation

Performance characterization of an integrated microscale hydrogen combustor recuperator and oil heat exchanger

Creator:: Haley, David B. (David Brien)
Abstract:: Experiments on a novel, microscale hydrogen combustor heat exchanger (µCHX) are presented in this thesis. The µCHX has been designed to efficiently transfer thermal energy to a heat transfer fluid for use in desorption of hydrogen from a metal hydride storage system of a hydrogen-powered fuel cell vehicle. The experimental...
Resource Type:: Masters Thesis
Full Text:: Heat Exchanger Abstract approved: Vinod Narayanan Experiments on a novel, microscale hydrogen

Lateral fluid motion in nucleate boiling through asymmetric surface structures

Creator:: Kapsenberg, Florian
Abstract:: This thesis presents a feasibility study of a means to passively effect liquid motion parallel to a heated surface though surface geometrical modifications. Such a passive system is beneficial for electronics cooling applications as it reduces the pumping equipment normally required in flow loops and is desired for space applications,...
Resource Type:: Masters Thesis
Full Text:: : ________________________________________________________________________ Vinod Narayanan This thesis presents a feasibility study of a means to passively effect

Study of a constrained-film bubble absorber under cycle operating conditions

Creator:: Cardenas, Ruander
Abstract:: An experimental and numerical study of absorption of ammonia vapor bubbles into a constrained thin film of ammonia-water solution is presented in the context of a potential reduction in size of a heat-actuated heat pump component. A large-aspect-ratio channel with a depth of 600 µm restricts the thickness of the...
Resource Type:: Masters Thesis
Full Text:: . Abstract approved: Vinod Narayanan An experimental and numerical study of absorption of ammonia

Thermally actuated pumping of a single-phase fluid using surface asymmetry

Creator:: Jo, Myeong Chan
Abstract:: An experimental study of thermally actuated pumping of a single-phase, single-component fluid is presented in the context of thermal management of a heat source. The prominent feature of this pumping method is that the very heat that is to be removed from the heat source causes a net fluid motion....
Resource Type:: Masters Thesis
Full Text:: Surface Asymmetry Abstract approved: Vinod Narayanan An experimental study of

A technique for spatially resolved wall temperature measurements in microchannel heat sinks using infrared thermography

Creator:: Krebs, Daniel P.
Abstract:: A non-intrusive measurement technique for direct quantitative thermal visualization of channel wall temperatures in two phase microchannel flows using infrared thermography (IRT) is presented. Specifically, the measurement of top channel wall temperatures in a fractal-like branching microchannel silicon heat sink during flow boiling is demonstrated and thoroughly documented. Obtaining quantitative...
Resource Type:: Masters Thesis
Full Text:: Using Infrared Thermography Abstract approved: Vinod Narayanan A non-intrusive

An experimental study of ammonia-water bubble absorption in a constrained microscale film

Creator:: Jenks, Jeromy W.
Abstract:: An experimental study of absorption of ammonia into a constrained thin film of ammonia-water solution is presented. A large aspect ratio microchannel with one of its walls formed by a porous material is used to constrain the thickness of the liquid film. Experiments were performed at a pressure of 1,...
Resource Type:: Masters Thesis
Full Text:: Constrained Microscale Film Abstract approved: Vinod Narayanan An experimental study of

Characterization of the near-field flow structure of an acoustically self-excited jet in a large enclosure using particle image velocimetry (PIV)

Creator:: Tobias, Jason A.
Abstract:: An experimental study of the near-field flow structure produced by an incompressible turbulent Acoustically Self-Excited Jet (ASEJ) in a large enclosure using Particle Image Velocimetry (PIV) is presented. The salient feature of this jet is that it provides an increase in near-field mixing and turbulence without additional external power input....
Resource Type:: Masters Thesis
Full Text:: approved: Vinod Narayanan An experimental study of the near-field flow structure produced by

ScholarsArchive@OSU

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

Flow boiling of lithium bromide-water solution in microchannels, with application to desorption

Application of infrared thermography for temperature measurement in microscale internal and external flows

Performance characterization of an integrated microscale hydrogen combustor recuperator and oil heat exchanger

Lateral fluid motion in nucleate boiling through asymmetric surface structures

Study of a constrained-film bubble absorber under cycle operating conditions

Thermally actuated pumping of a single-phase fluid using surface asymmetry

A technique for spatially resolved wall temperature measurements in microchannel heat sinks using infrared thermography

An experimental study of ammonia-water bubble absorption in a constrained microscale film

Characterization of the near-field flow structure of an acoustically self-excited jet in a large enclosure using particle image velocimetry (PIV)

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