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Entropy generation due to laminar incompressible forced convection flow through parallel-plates microchannel. (English) Zbl 1130.76421
Summary: The entropy generation due to steady laminar forced convection fluid flow through parallel plates microchannel is investigated numerically. The effects of Knudsen, Reynolds, Prandtl, Eckert numbers and the nondimensional temperature difference on entropy generation within the microchannel are discussed. The fraction of the entropy generation due to heat transfer to the total entropy generation within the microchannel is studied in terms of Bejan number. The entropy generation within the microchannel is found to decrease as Knudsen number increases, and it is found to increase as Reynolds, Prandtl, Eckert numbers and the nondimensional temperature difference increase. The contribution of viscous dissipation to the total entropy generation increases as Knudsen number increases over wide ranges of the flow controlling parameters.

MSC:
76R05 Forced convection
80A20 Heat and mass transfer, heat flow (MSC2010)
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