In this paper, a multi-scale numerical simulation method is proposed by the layered method for immersion heat dissipation of high heat flux electronic cooling. The mathematical model of a tetrakaidecahedron is used to simplify structure of the porous medium. The geometry of it constructed by the spin-stacking approach is much closer to realistic single-layer or thin porous materials. The Lattice Boltzmann method (LBM) is used to simulate the boiling process by the modification code of palabos. Macroscopic level of temperature and flow field is obtained by COMSOL. It is verified that the multi-scale numerical simulation method is efficient and easy to deliver in simulation of porous medium at large extent. It has little error (less than 5%) compared with experimental results. Compared with WP model, it can save computing resources (up to 70%).

本文提出了一种基于分层法的高热通量电子冷却浸没散热的多尺度数值模拟方法。使用十四面体的数学模型来简化多孔介质的结构。通过自旋堆叠方法构建的几何形状更接近于现实的单层或薄多孔材料。采用格子玻尔兹曼方法（LBM），通过palabos的修改代码模拟沸腾过程。温度和流场的宏观水平是通过 COMSOL 获得的。验证了多尺度数值模拟方法在多孔介质模拟中的有效性和易于传递性。与实验结果相比误差很小（小于5%）。与WP模型相比，可以节省计算资源（最高70%）。