Abstract

An anisotropic gas–surface interaction model is examined for its possible use as a boundary condition in solving a kinetic equation. The surface aerodynamic coefficients and the temperatures obtained by applying a two-parameter anisotropic reflection model and the Cercignani–Lampis boundary condition for external flow problems with various Knudsen numbers and accommodation coefficients are numerically compared. It is shown that the geometry of the body influences the degree of the difference between the solutions for different models of boundary conditions.

中文翻译：

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广义麦克斯韦和切尔西尼亚尼-兰皮斯模型的数值比较

摘要

研究了各向异性的气体-表面相互作用模型作为求解动力学方程的边界条件的可能用途。比较了通过应用两参数各向异性反射模型和Cercignani–Lampis边界条件获得的表面空气动力学系数和温度，该温度条件适用于具有各种Knudsen数和调节系数的外部流动问题。结果表明，物体的几何形状影响边界条件不同模型的解之间的差异程度。