THERMAL PERFORMANCE STUDY OF A RADIAL MICROCHANNEL HEAT SINK USING MULTI-LAYERS DIVERGENT CHANNELS

The fluid flow and heat transfer characteristics of a radial microchannel heat sink (RMCHS) with difference divergent channel have been studied numerically using soft packaged Fluent ANSYS. A five different divergent angles was applied at the side walls of the radial microchannel only, while the upper and bottom walls were remained horizontal. The calculations were conducted for laminar flow with Reynolds number of 50. Results of (RMCHS) with divergence angle 1.15° show that maximum enhancement in heat transfer performance of around 32.4% over that of the uniform channels arrangement and decrease in uniformity temperature about 7.9%.