Variation of heat transfer characteristics of a microchannel heat sink with geometry

In this paper, variation of heat transfer characteristics has been studied for a microchannel heat sink. A curvature has been added to the geometry of rectangular microchannel heat sinks to improve its heat transfer characteristics. Simulations have been performed by solving the governing equations along with boundary condition using the Ansys Fluent. Two types of cross sections, characterised by their hydraulic diameters, and a range of reynold’s number varying from 100 to 800 has been used in this study to understand the effects of geometry on heat transfer. The results of the curved and rectangular microchannels have been plotted and compared with each other. From the results, it was observed that by adding a curvature to the microchannel, better heat removal performances can be obtained. Curved channels showed better performance in the temperature gain between the inlet and outlet, and have a higher value of heat transfer coefficient. Further, the channel having less hydraulic diameter has better performance than the one with more hydraulic diameter.