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Numerical simulation of three-dimensional combined convective radiative heat transfer in rectangular channels

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dc.contributor.advisor Anand, N.K en_US
dc.creator Ko, Min Seok en_US
dc.date.accessioned 2010-01-15T00:11:58Z en_US
dc.date.accessioned 2010-01-16T00:40:04Z
dc.date.available 2010-01-15T00:11:58Z en_US
dc.date.available 2010-01-16T00:40:04Z
dc.date.created 2007-12 en_US
dc.date.issued 2009-05-15 en_US
dc.identifier.uri http://hdl.handle.net/1969.1/ETD-TAMU-2542
dc.description.abstract This dissertation presents a numerical simulation of three-dimensional flow and heat transfer in a channel with a backward-facing step. Flow was considered to be steady, incompressible, and laminar. The flow medium was treated to be radiatively participating. Governing momentum equations, energy equation, and the radiative equation were solved by a finite volume method. Extensive validation studies were carried out. As part of the validation study, three-dimensional combined convection and radiation in a rectangular channel without a backward-facing step was studied. The SIMPLE algorithm was used to link pressure and velocity fields. The combined convective-radiative heat transfer were studied by varying three parameters, i.e. optical thickness ( H τ =0.1, 0.2, and 0.4) and scattering albedo ( ω=0, 0.25, 0.5, 0.75 and 1). Variation of thermophysical properties with temperature was considered in this study. In this work consideration was given only to cooling. Effects of those radiative parameters on velocity, bulk temperature, and Nusselt number are presented in detail. The fluid with a hot inlet compared to a cold wall was cooled in a relatively short distance from the channel inlet because of the radiation effect. The thermal penetration decreased with a decrease in optical thickness and an increase in scattering albedo. Thermal penetration increased with increasing optical thickness and decreasing scattering albedo. The reattachment length varied with temperature due to variation of thermophysical properties with temperature. en_US
dc.format.medium electronic en_US
dc.format.mimetype application/pdf en_US
dc.language.iso en_US en_US
dc.subject Combined mode heat transfer en_US
dc.subject Radiation en_US
dc.subject backward-facing step en_US
dc.subject Xu line en_US
dc.title Numerical simulation of three-dimensional combined convective radiative heat transfer in rectangular channels en_US
dc.type Book en
dc.type Thesis en
thesis.degree.department Mechanical Engineering en_US
thesis.degree.discipline Mechanical Engineering en_US
thesis.degree.grantor Texas A&M University en_US
thesis.degree.name Doctor of Philosophy en_US
thesis.degree.level Doctoral en_US
dc.contributor.committeeMember Annamalai, Kalyan en_US
dc.contributor.committeeMember Chen, Hamn-Ching en_US
dc.contributor.committeeMember Lau, Sai en_US
dc.type.genre Electronic Dissertation en_US
dc.type.material text en_US
dc.format.digitalOrigin born digital en_US

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