Abstract
Facing the challenge of high heat flux in electronic devices, effective heat dissipation with low consumption has drawn great attention. Based on the constructal theory, the optimal structures of fractal heat sinks are obtained by genetic algorithm (GA) optimization. The optimal branching level is 4. Furthermore, the Taguchi experimental design is employed to conduct the CFD simulation, and the grey analysis and variance analysis are used to investigate the influence rank and contribution of impact factors (branching levels, fractal number, heat flux, and flow rate) on the performance parameters (maximum temperature, pressure drop and comprehensive performance). It is found that the heat flux exhibits the highest contributions of 74.75% and 79.26% on the performance value of maximum temperature and comprehensive performance, respectively. For the pressure drop, the fractal number show the highest contribution of 67.99%. This work provides a novel method and guidance for the design and analysis of heat sinks.
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