Flow and Heat Transfer in a Trapezoidal Cross-Sectional Microchannel Heat Sink Using Nanofluid

In this study, the effects of microchannel number, volume concentration, Reynolds and nanofluid type on heat transfer flow characteristics in sink consisting trapezoidal microchannels are investigated numerically. Governing equations solved by assuming three-dimensional, incompressible, steady laminar flow. The channel material is chosen as copper, a constant flux boundary condition defined upper wall sink. For two different nanofluids, CuO-water Al2O3-water, parameters number channels (n=3-5) sink, (Re=200-1500), concentration (=0-4%). Results show that using nanoparticles base fluid causes to increase both coefficient pressure drop. Heat increases with increasing cross-sectional number. Pressure drop enhances enhancing do not importantly affect friction factor. According performance index, it seen adding CuO water convenient, but Al2O3 appropriate. It observed for affects thermal performance, Al2O3-water does affect.