Index Catalog // ScholarsArchive@OSU

Time-domain modeling of heaving point absorber wave energy converters, including power take-off and mooring

Creator:: Ruehl, Kelley
Abstract:: Wave energy conversion is still in its infancy, and in order for it to become a commercially viable technology, developers, investors and utilities need to estimate a Wave Energy Converter's (WEC's) performance for the wave climate of a potential installation site. With the goal of estimating a design's power output...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Kelley Ruehl for the

Modelling Thin Liquid Film Draining of Bubbles on Porous Media in Confined Geometry

Creator:: Bahm, Jared S.
Abstract:: The behavior of the thin liquid ﬁlm formed between a bubble and hydrophobic membrane is of high interest in applications where separating two-phase mixtures is beneﬁcial. One such application is in-situ vapor extraction heat sinks. In these systems, high heat transfer rates are accomplished by taking advantage of the high...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Jared S. Bahm for the degree of

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

On the optimization of performance in fractal-like branching microchannel heat transfer devices

Creator:: Heymann, Douglas Benjamin
Abstract:: Fractal-like branching microchannel flow networks have been found to improve wall temperature uniformity and decrease both pressure drop and flow power compared to arrays of straight microchannels. The present study seeks to maximize the benefits of fractal-like branching channels by means of a gradient-based optimization algorithm. The algorithm identifies the...
Resource Type:: Dissertation
Full Text:: Abstract approved: Deborah V. Pence Fractal-like branching microchannel flow networks have been found to

Experimental study of two-phase gas-liquid flow in a microscale fractal-like branching flow network

Creator:: Kwak, Younghoon
Abstract:: Two-phase gas-liquid flows in microscale fractal-like branching channel flow networks were experimentally studied to assess the validity of existing void fraction correlations and flow regimes based on superficial gas and liquid velocities. Void fractions were assessed using two different methods. First, void fraction data were acquired using a High-Speed-High-Resolution (HSHR)...
Resource Type:: Dissertation
Full Text:: Deborah V. Pence Two-phase gas-liquid flows in microscale fractal-like branching channel flow

Spatio – temporal temperature variations during droplet impingement evaporation : effects of nanofluid and nano-structured surface

Creator:: Graber, Christof
Abstract:: Droplet and spray impingement cooling are typically used in high heat flux thermal management. In this thesis, droplet impingement and evaporation heat transfer characteristics are determined from measured spatially- and temporally- varying fluid and surface temperatures. Unique to this study is the documentation of the effects of using a nanofluid...
Resource Type:: Masters Thesis
Full Text:: Evaporation: Effects of Nanofluid and Nano-structured Surface Abstract approved: Deborah V. Pence

Proportional integral derivative control of an oil-heated fractal-like branching microchannel desorber

Creator:: Davis, Keith R.
Abstract:: A PID controller was designed to control the performance of an oil-heated fractal-like branching microchannel desorber for use in an ammonia-absorption refrigeration system. Both the amount and concentration of ammonia refrigerant generated at the desorber can be controlled by choosing the rectified circulation ratio as the controlled variable in a...
Resource Type:: Masters Thesis
Full Text:: Deborah V. Pence A PID controller was designed to control the performance of an oil-heated fractal

Experimental study of subcooled water spray cooling using flow symmetric micro-structured surfaces

Creator:: Tulchinsky, Alex M.
Abstract:: Spray impingement cooling has been shown to be a leading candidate for future high heat flux cooling applications. In general, spray cooling curves consist of three heat flux regimes; single-phase, two-phase and critical heat flux (CHF). CHF is considered the design limit for almost all two-phase cooling applications, as a...
Resource Type:: Masters Thesis
Full Text:: : Deborah V. Pence James Liburdy Spray impingement cooling has been shown to be a

Modeling of Non-Spherical Particle Dynamics in a Non-Uniform Flow

Creator:: Alshehri, Ahmad S.
Abstract:: Turbulent flow with suspended, non-spherical particles can be found in nature and several industrial applications. Although turbulence with dispersed spherical particles has been studied extensively, modeling the dynamics of non-spherical particles in a turbulent flow has not been studied extensively. Motion of spherical particles in complex flows is typically captured...
Resource Type:: Masters Thesis
Full Text:: master’s thesis committee: Dr. Deborah Pence, Dr. James Liburdy, and Dr. Jonathan Istok. I would like to

Simulation of drag reduction due to multi-aligned spheres

Creator:: Lindqvist, Varna
Abstract:: A method was sought to predict the flight paths and collisions for closely spaced ink droplets of various sizes as a design aid for ink-jet printing development. Computational fluid dynamics models of two rigid aligned spheres, as a proxy for ink droplets, were initiated in atmospheric pressure air at constant...
Resource Type:: Masters Thesis
Full Text:: . Abstract approved: ____________________________________________________________________ Deborah V

ScholarsArchive@OSU

Time-domain modeling of heaving point absorber wave energy converters, including power take-off and mooring

Modelling Thin Liquid Film Draining of Bubbles on Porous Media in Confined Geometry

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

On the optimization of performance in fractal-like branching microchannel heat transfer devices

Experimental study of two-phase gas-liquid flow in a microscale fractal-like branching flow network

Spatio – temporal temperature variations during droplet impingement evaporation : effects of nanofluid and nano-structured surface

Proportional integral derivative control of an oil-heated fractal-like branching microchannel desorber

Experimental study of subcooled water spray cooling using flow symmetric micro-structured surfaces

Modeling of Non-Spherical Particle Dynamics in a Non-Uniform Flow

Simulation of drag reduction due to multi-aligned spheres

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