Analysis of streamwise conduction in forced convection of microchannels using fin approach |
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Authors: | Suhandran Muniandy and Yew Mun Hung |
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Institution: | (1) Department of Thermal Machines and Transportation, Faculty of Mechanical Engineering, University Politehnica Timisoara, B-dul Mihai Viteazu nr. 1, 300222 Timisoara, Romania |
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Abstract: | The effects induced by streamwise conduction on the thermal characteristics of forced convection for single-phase liquid flow
in rectangular microchannel heat sinks under imposed constant wall temperature have been studied. By employing the fin approach
in the first law of analysis, models with and without streamwise conduction term in the energy equation were developed for
hydrodynamically and thermally fully-developed flow under local thermal non-equilibrium for the solid and fluid phases. These
two models were solved to obtain closed form analytical solutions for the fluid and solid temperature distributions and the
analysis emphasized details of the variations induced by the streamwise conduction on the fluid temperature distributions.
The effects of the Peclet number, aspect ratio, and thermal conductivity ratio on the thermal characteristics of forced convection
in microchannel heat sinks were analyzed and discussed. This study reveals the conditions under which the effect of streamwise
conduction is significant and should not be neglected in the forced convective heat transfer analysis of microchannel heat
sinks. |
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Keywords: | |
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