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ISSN Печать: 2152-5102
ISSN Онлайн: 2152-5110
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INHERENT IRREVERSIBILITY IN CU-H2O NANOFLUID COUETTE FLOW WITH VARIABLE VISCOSITY AND NONLINEAR RADIATIVE HEAT TRANSFER
Краткое описание
In this paper, the combined effects of thermal radiation, variable viscosity, nanoparticles shape, and volume fraction on the thermal performance and inherent irreversibility of a water-copper nanofluid Couette flows in a low aspect ratio microchannel have been investigated. The nonlinear governing equations are obtained and tackled numerically using shooting method with Runge-Kutta-Fehlberg integration scheme. The effects of various emerging thermophysical parameters on the nanofluid velocity and temperature profiles, skin friction, Nusselt number, thermal stability criteria with respect to critical Eckert number, entropy generation rate, and Bejan number are presented graphically and discussed. It is observed that both nanoparticles shapes and volume fraction have great influence on the nanofluids thermal stability and entropy generation rate. In addition, thermal radiation enhances the cooling and thermal stability of the nanofluid.
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