Numerical study of fluid flow and heat transfer in microchannel heat sinks with spiral structures

Three-dimensional numerical investigations were carried outon heat transfer and flow in seven microchannel heat sink(MCHS) configurations and their performance has beencompared with the conventional microchannel heat sink.Seven microchannels including straight, converging-straight,diverging-straight, spiral, converging-spiral, diverging-spiraland a novel double interconnected spiral have beendesigned. Numerical analysis has been performed withconstant heat applied to the bottom surface of each channelat different Reynolds numbers. Converging-spiral has thehighest heat transfer but with large pressure drop trade-off.Double interconnected spiral found to be the best inperformance with higher heat transfer and reasonablepressure drop due to the better vortex generation.