采用格子Boltzmann方法对真实多孔介质复合腔体内的对流传热进行研究,分析了不同Ra、多孔介质高度Y和厚度δ条件下交界面处的热滑移效应,并确定热滑移系数。利用X-CT技术对真实多孔介质材料进行断层扫描,获得实际材料内部结构图片,并进行图片处理,再导入格子Boltzmann模型中进行求解。计算结果表明:等效热滑移系数随高度Y的影响较大,靠近壁面或固体表面的系数偏大,而间隙处的系数偏小,但两处各自的值基本相同;Ra和厚度δ的变化对等效热滑移系数的作用较小。 The lattice Boltzmann method was used to study the convective heat transfer in the complex porous media chamber. The thermal slippage effects at different interface, the height Y and the thickness δ of the porous media were analyzed and the thermal slip coefficient was determined. The X-CT technique was used to scan the real porous media to get the pictures of the internal structure of the actual material. The images were processed and imported into the lattice Boltzmann model to solve the problem. The calculated results show that the equivalent thermal slip coefficient is greatly affected by the height Y, the coefficient close to the wall or the solid surface is large, and the coefficient at the gap is small, but the two values ​​are basically the same. The values ​​of Ra and thickness δ The effect of the change on the equivalent thermal slip coefficient is small.