有限体积法求散射性介质辐射传递及耦合换热

Analysis of conductive-radiative coupling heat transfer in scatting, semi-teansparent media using finite volume method

由于对不规则边界适应性强及处理各向异性散射方便等优点 ,有限体积法近年成为求解复杂几何形状、散射性介质内辐射传递的有力方法之一 .利用有限体积法计算了一维各向异性纯散射介质内的辐射传递 ,其结果与理论解吻合较好 .此外 ,借助该有限体积法模型 ,计算了吸收、散射性半透明介质内的导热和辐射耦合换热温度场 ,分析了散射相函数对温度分布的影响 ,与各向同性散射相比 ,前向散射使介质低温侧的温度升高 ,而使介质高温侧的温度降低 ,而后向散射的作用相反 .

The finite-volume method for radiation is applied to solve the radiative transfer in pure anistropically scatting, plane-parallel media. The result fit well with theoretical result. According to calculating the coupled conduction-radiation temperature profile in the absorbing, scatting, semi-transparent media, the effect of anisotropic scattering on temperature field is studied as well. Compared with the isotropic scatting, the forward scatting raises the temperature near low temperature boundary, while it decreases the temperature near high temperature boundary. For the backward scatting, it shows opposite regulation.