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首页> 外文期刊>International Journal of Heat and Mass Transfer >Conservation of asymmetry factor in phase function discretization for radiative transfer analysis in anisotropic scattering media
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Conservation of asymmetry factor in phase function discretization for radiative transfer analysis in anisotropic scattering media

机译：各向异性散射介质中辐射传递分析的相函数离散化中的不对称因子守恒

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摘要

A new phase function normalization technique is developed for use with anisotropic scattering media and is applied to the conventional discrete-ordinates method. The new approach is shown to ensure conservation of both scattered energy and phase function asymmetry factor after directional discretization when considering the Henyey-Greenstein phase function approximation. Results show the necessity of conservation of the asymmetry factor as well as of the scattered energy. Lack of either conservation can lead to false results for radiation analysis in highly anisotropic media. Wall flux profiles predicted by the normalized DOM in a highly anisotropic scattering cylinder are compared with FVM and isotropic scaling profiles. The effect of scattering albedo and optical thickness is examined. For the tested benchmark problem, it is found that heat flux profiles generated with the present normalization approach conform more accurately to both FVM and isotropic scaling profiles than when the previous normalization techniques are implemented.
机译：开发了一种新的用于各向异性散射介质的相函数归一化技术，并将其应用于常规的离散坐标方法。当考虑到Henyey-Greenstein相函数逼近时，新方法表明可以确保方向离散后既保留了散射能量，又保留了相函数不对称因子。结果表明，必须保存不对称因子以及散射能量。在高度各向异性的介质中，缺少任何一种保护都会导致错误的辐射分析结果。将高度各向异性的散射圆柱体中归一化DOM预测的壁通量分布与FVM和各向同性缩放分布进行比较。检查散射反照率和光学厚度的影响。对于经过测试的基准问题，发现与实施以前的标准化技术相比，使用本标准化方法生成的热通量分布图更准确地符合FVM和各向同性缩放分布图。

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