Index Catalog // ScholarsArchive@OSU

Applications of the thermal wave technique in liquid thermal conductivity measurements and flow field diagnostics

Creator:: Wang, Zhefu
Abstract:: The thermal wave technique has been explored for the use of liquid thermal conductivity measurement and flow property diagnostics in this dissertation. For liquid thermal conductivity measurements, an experimental technique based on the thermal wave approach is developed. A stainless steel strip functions as both a heating element and a...
Resource Type:: Dissertation
Full Text:: Firstly, I would like to thank my advisor, Dr. R. Peterson, for his guidance throughout my research, for

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:: ................................................... 90 7.3 Droplet equivalent diameter, dequiv, as a function of non- dimensional time, t/tev, for a

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:: al. [13] performed experiments with R-113 on a number of space shuttle flights and observed that

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:: Electrical Power (kW ) q′′ Heat flux (W/m2) r Radius (m) Re Reynolds number Sy,x Standard error estimate

An experimental study of flow boiling heat transfer enhancement in minichannels with porous mesh heating wall

Creator:: Wang, Hailei
Abstract:: A unique channel surface enhancement technique via diffusion-bonding a layer of conductive fine wire mesh onto the heating wall was developed and used to experimentally study flow boiling enhancement in parallel microchannels. Each channel was 1000 μm wide and 510 μm high. A dielectric working fluid, HFE 7000, was used...
Resource Type:: Dissertation
Full Text:: Flux g Gravity Acceleration q"0 Measured Local Heat Flux G Mass Flux r Mouth Radius of Cavity h Heat

Design, modeling and performance of miniature reciprocating expander for a heat actuated heat pump

Creator:: Herron, Thomas G.
Abstract:: A miniature reciprocating expander is being developed as part of a larger program to develop a heat actuated heat pump for portable applications. By utilizing the higher energy density of liquid hydrocarbon fuels relative to batteries, a heat actuated heat pump would be able to provide cooling for much longer...
Resource Type:: Masters Thesis
Full Text:: of the ratio of inlet to exhaust pressure, r, the inlet temperature, and the ratio of specific heats

Flow characteristics of semi-confined impinging jet arrays

Creator:: Dano, Bertrand P. E.
Abstract:: The present study proposes to investigate the flow structure of different arrays of jets impinging on a flat surface enclosed by three walls, creating a channel that forces the air to leave in one preferential direction, generating a self sustain crossflow. Details of both the mean and some turbulence quantities...
Resource Type:: Masters Thesis
Full Text:: surface. The jet orifice aspect ratio was set to the values r=2 and 3. The jet hydraulic diameter was DH

An experimental study of fluid flow and heat transfer in rectangular microchannels

Creator:: Popescu, Aristotel
Resource Type:: Dissertation
Full Text:: Flow and Heat Transfer in Rectangular Microchannels. Abstract approved: James R. This thesis reports

Effects of orifice geometry and surface boundary condition on heat transfer of impinging jet array

Creator:: Kanokjaruvijit, Koonlaya.
Abstract:: The effects of the orifice geometry and the surface boundary condition on the heat transfer distribution to a flat surface of an impinging jet array were investigated. The jet array impinged normally onto the surface which was either isothermal or had a uniform heat flux. The experiments were performed for...
Resource Type:: Masters Thesis
Full Text:: Flow Rate, m 3/s R Resistance, .Q Re Reynolds number, rh Dh/AjJ..l S Spacing from jet

An experimental study of friction factors and mixed convection in the thermal entrance region of vertically narrow, horizontal rectangular channels for different heating conditions and aspect ratios

Creator:: Hong, Seung-Ho
Abstract:: Heat transfer and fluid mechanical behavior of water flowing horizontally in vertically-narrow rectangular channels was studied in this work. Friction factor and Nusselt number variations were determined experimentally for four different wall heating conditions, and for aspect ratios(height to width) of 5, 4, 3, 2, and 1. Wall heating conditions...
Resource Type:: Dissertation
Full Text:: privacy ACKNOWLEDGMENTS I would like to thank my major professor, Dr. James R. Welty, who guided me

ScholarsArchive@OSU

Applications of the thermal wave technique in liquid thermal conductivity measurements and flow field diagnostics

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

Lateral fluid motion in nucleate boiling through asymmetric surface structures

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

An experimental study of flow boiling heat transfer enhancement in minichannels with porous mesh heating wall

Design, modeling and performance of miniature reciprocating expander for a heat actuated heat pump

Flow characteristics of semi-confined impinging jet arrays

An experimental study of fluid flow and heat transfer in rectangular microchannels

Effects of orifice geometry and surface boundary condition on heat transfer of impinging jet array

An experimental study of friction factors and mixed convection in the thermal entrance region of vertically narrow, horizontal rectangular channels for different heating conditions and aspect ratios

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