Shape Optimization of Grooved Micro-Channel Heat Sink

초록

Micro-channel heat sink with groove structure has been optimized by using multi-objective evolutionary algorithm. The thermal resistance and pumping power characteristics of the micro-channel heat sink have been investigated numerically. For optimization, four design variables, i.e., the ratios of the groove depth to the micro-channel height, the groove pitch to the micro-channel height, the groove diameter to pitch, and the micro-channel width to height, are selected. The thermal resistance and the pumping power are the objective functions. The Navier-Stokes and energy equations for laminar flow and conjugate heat transfer are solved using a finite-volume solver. Grooved micro-channel shows decrease in thermal resistance and increase in Nusselt number over smooth micro-channel. The thermal resistance in a grooved micro-channel is lower than that in a smooth micro-channel for a fixed pumping power.