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Numerical simulation of buoyancy induced flow and heat transfer in a vertical channel with discrete heat sources

Effective cooling of electronic components arranged in vertically oriented parallel boards is considered. The objective of the present investigation is to examine the effects of global flow in a channel upon the local heat transfer from a flush mounted source. The concept of adiabatic heat transfer coefficient and its application is clarified by reviewing its origins and examining a series of numerical experiments on a well-defined model problem. Simulations are conducted in the regions of laminar forced flow, mixed forced and local buoyant convection and buoyancy-induced flow. Local buoyancy effects cause a departure of adiabatic heat transfer coefficient from its value for pure forced convection. Calculations cover the range 10-3 at Pr = 0.7. The superposition principle for temperature fields is validated for forced convection. The effects of mixed convection upon this phenomenon is subsequently examined.

Identiferoai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/278169
Date January 1992
CreatorsLall, Balwant Singh, 1969-
ContributorsOrtega, Alfonso
PublisherThe University of Arizona.
Source SetsUniversity of Arizona
Languageen_US
Detected LanguageEnglish
Typetext, Thesis-Reproduction (electronic)
RightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.

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