Flow field, heat transfer and entropy generation of nanofluid in a microchannel using the finite volume method

摘要

In this study, the finite volume method and the SIMPLER algorithm isemployed to investigate forced convection and entropy generation of Cuwater nanofluid in a parallel plate microchannel. There are four obstaclesthrough the microchannel, and the slip velocity and temperature jumpboundary conditions are considered in the governing equations to increasethe accuracy of modeling. The study is conducted for the Reynolds numbersin the range of 0.1Re10, Knudsen numbers ranging of 0Kn0.1, andvolume fraction of nanoparticles ranging of 0Φ0.04. The results show thatby increasing the Knudsen number, the average Nusselt number and totalentropy generation rate decrease. Moreover, with augmentation of theReynolds number, the average Nusselt number and total entropy generationrate decrease. What’s more, by increasing the volume fraction of nanofluids,the temperature of the nanofluid reduces, and as a result, the temperaturegradient as well as heat transfer increase.