Topology optimization of heat sink based on variable density method

A topology optimization method based on the variable density method is used to optimize the design of the forced convection air heat sink structure, with minimum pressure drop as the optimization objective and heat transfer performance as the constraint, using a two-layer 2D model instead of the traditional 3D model. The technique of changing the interpolation parameters is introduced in the optimization process to effectively avoid the formation of blocking structures in the optimization. The optimized heat sink effectively enhances the heat transfer performance. Compared with the straight fin heat sink, the average temperature of the topology optimized heat sink decreases by 5.76%, indicating a lower temperature with the same pump power. This new type of heat sink contributes to energy saving and emission reduction.