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Investigation on the Extendibility of Self-Similar Heat Sink for Cooling Electrical Equipment With Varying Sizes

As a new design of manifold microchannel heat sink (MMHS), a self-similar heat sink (SSHS) is more compact and has better flexibility in layout. Modifications to the structure of original SSHS to mitigate the flow maldistribution inside the heat sink were adopted based on our previous work, inclusive of the tapered inlet header and manifold inlet channels. Numerical work was carried out to validate the extendibility of the modified SSHS in cooling heat release surface with varying sizes by comparing it with traditional designs of MHS and SSHS. The results indicated that an alternative increase and decrease in heating temperature along the manifold inlet channels lead to the potential for SSHS in heat transfer uniformity. Even though, due to nonuniform flow distribution for original SSHS, heat transfer keeps deteriorating as the heat transfer area increases. The modified SSHS has superiority in heat transfer uniformity and good extendibility to the larger cooling area compared with that of the original design due to its uniform flow distribution process.