Numerical simulation of heat transfer in rectangular microchannel

Yao, Jun, Yao, Yufeng, Mason, Peter J. and Patel, Mayur K. (2009) Numerical simulation of heat transfer in rectangular microchannel. Journal of Advances in Applied Mathematics and Mechanics, 1 (2). pp. 231-241. ISSN 2070-0733

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Numerical simulation of heat transfer in a high aspect ratio rectangular
microchannel with heat sinks has been conducted, similar to an experimental study.
Three channel heights measuring 0.3 mm, 0.6mmand 1mmare considered and the
Reynolds number varies from 300 to 2360, based on the hydraulic diameter. Simulation
starts with the validation study on the Nusselt number and the Poiseuille
number variations along the channel streamwise direction. It is found that the predicted
Nusselt number has shown very good agreement with the theoretical estimation,
but some discrepancies are noted in the Poiseuille number comparison. This
observation however is in consistent with conclusions made by other researchers
for the same flow problem. Simulation continues on the evaluation of heat transfer
characteristics, namely the friction factor and the thermal resistance. It is found
that noticeable scaling effect happens at small channel height of 0.3 mm and the
predicted friction factor agrees fairly well with an experimental based correlation.
Present simulation further reveals that the thermal resistance is low at small channel
height, indicating that the heat transfer performance can be enhanced with the
decrease of the channel height.

Keywords:Computational fluid dynamics, rectangular microchannel, scaling effect, thermal resistance.
Subjects:H Engineering > H611 Microelectronic Engineering
Divisions:College of Science > School of Engineering
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ID Code:5425
Deposited On:07 May 2012 15:39

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