Index Catalog // ScholarsArchive@OSU

Condensation of a zeotropic mixture, R-454C, and its individual components, R-1234yf and R-32, in microfin tubes

Creator:: Matty, Ethan P.
Abstract:: This work compares the condensation heat transfer and pressure drop for zeotropic refrigerant R-454C and its individual components, R-32 and R-1234yf, in horizontal microfin tubes. One microfin tube has a 4 mm outer diameter, 0.18 mm wall thickness, and a surface area ratio of 1.56. The second tube has a...
Resource Type:: Masters Thesis
Full Text:: a Zeotropic Mixture, R-454C, and its Individual Components, R-1234yf and R-32, in Microfin Tubes

A computer imaging method for fluid motion studies in metal casting

Creator:: Poland, John H.
Abstract:: Significant reductions in the number of defects in parts produced by investment casting can be obtained by improving the flow of the molten metal during pouring. Studies have been done at Oregon State University with simulated casting techniques to determine optimal mold configurations. Better mold layouts have been shown to...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF John H. Poland for the degree

Using Digital Human Modeling to Evaluate and Improve Car Pillar Design: A Proof of Concept and Design of Experiments

Creator:: Mellon, Taylor R. P.
Abstract:: Considering human factors in early engineering design stages can improve expensive late stage processes, facilitate user safety, improve product quality and help reduce the need for physical prototyping. Currently, car pillar design (the vertical pillars between windows which connect the roof and car body) provide safety for the passengers in...
Resource Type:: Masters Thesis
Full Text:: Evaluate and Improve Car Pillar Design: A Proof of Concept and Design of Experiments Abstract approved: H

Effect of lateral force on passenger comfort during a mechanically assisteddependent transfer

Creator:: Mast, Jonathan J.
Abstract:: Air travel presents several problems for passengers with disabilities. One in particular is how they get from their wheelchair and to an aircraft seat. The commonly used manual transfer method is hazardous to the assistants and the passenger. There are other alternatives, but they have plenty of room for improvement....
Resource Type:: Masters Thesis
Full Text:: . Abstract approved: ________________________________________________ Joseph R. Zaworski Air

Integrated forward light scattering as a measure of aerosol mass concentration

Creator:: Tomine, Chris Shinya
Abstract:: A mathematical model was developed that relates the ratio, R, of two light flux measurements to the mass concentration, m, of the atmospheric aerosol particles between a source of parallel light (e.g., the sun) and the measuring system. R is defined as the ratio of the light fluxes passing through...
Resource Type:: Dissertation
Full Text:: . Foubel Aba.iract approved: A mathematical model was developed that relrtes the ratio, R, of two light

Modeling hop kilning with respect to energy consumption and drying kinetics

Creator:: Thomas, Matthew W.
Abstract:: Currently, little work has been performed studying energy consumption in hop kilning. This thesis explores drying with an alternative drying schedule that extends the initially elevated drying temperature currently used by growers and examines its impact on drying time and energy use. Extending the time of the initially elevated drying...
Resource Type:: Masters Thesis
Full Text:: : _____________________________________________________ Brian M. Fronk Karl R

Heat transfer in magnetic fluids at low Reynolds number

Creator:: Choi, Sang Hyouk
Abstract:: This study was concerned with the flow of a magnetic self-propelled ferrohydrodynamic fluid in a horizontal circular tube subjected to axially varying temperature and magnetic field. The first phase of the study involved the analytical solution to the governing equations for the velocity and temperature profiles within the fully developed...
Resource Type:: Dissertation
Full Text:: - laxation time is so small that the spin energy becomes frozen soon to its domain. H = r , He, H z l

Optimization of staged rankine energy conversion cycles for high efficiency

Creator:: Simmons, Larry Dean
Abstract:: Because of the fuel crisis and problems associated with thermal pollution there is new impetus and urgency for developing more efficient energy conversion systems for power generation. A preliminary analysis was undertaken to determine the potential of staged Rankine cycle systems for substantially higher efficiency. It was necessary to optimize...
Resource Type:: Dissertation
Full Text:: approved: Redacted for privacy -Dr. R. J. Zaworski Because of the fuel crisis and problems associated with

An experimental investigation of the thermomechanics of pipe flow of magnetic fluids in response to heating and applied magnetic fields

Creator:: Hamedani, Hooshyar M.
Abstract:: An experimental investigation was carried out to determine the thermodynamics and fluid mechanics of the pipe flow of magnetic fluids. A water-based magnetic fluid was synthesized in the laboratory and its relative viscosity and magnetic properties were determined as a function of temperature. A "thermomagnetic pump" was built and tested...
Resource Type:: Dissertation
Full Text:: equation is: H(r) p(r,h) + pgh(r) - Ao M(To,c)dc = p(oo,h) + pgh(ce) - Ao M(To,c)dc . (3-1) Along the

Evaluation of the predictive capability of two-phase flow maps for microchannel condensation of R-134a at low mass flux conditions

Creator:: VanderPutten, Michael A.
Abstract:: Predicting condensation flow regimes and the associated heat transfer and pressure drop in microchannels is critical for designing terrestrial and space systems for heating, cooling, power generation, and advanced manufacturing. It is well established that in flows approaching the microscale (Dh < 1 mm) gravity-dominated flow regimes become less relevant,...
Resource Type:: Masters Thesis
Full Text:: : Evaluation of the Predictive Capability of Two-Phase Flow Maps for Microchannel Condensation of R-134a at

ScholarsArchive@OSU

Condensation of a zeotropic mixture, R-454C, and its individual components, R-1234yf and R-32, in microfin tubes

A computer imaging method for fluid motion studies in metal casting

Using Digital Human Modeling to Evaluate and Improve Car Pillar Design: A Proof of Concept and Design of Experiments

Effect of lateral force on passenger comfort during a mechanically assisteddependent transfer

Integrated forward light scattering as a measure of aerosol mass concentration

Modeling hop kilning with respect to energy consumption and drying kinetics

Heat transfer in magnetic fluids at low Reynolds number

Optimization of staged rankine energy conversion cycles for high efficiency

An experimental investigation of the thermomechanics of pipe flow of magnetic fluids in response to heating and applied magnetic fields

Evaluation of the predictive capability of two-phase flow maps for microchannel condensation of R-134a at low mass flux conditions

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