有限体积法解多场耦合下散射性非灰介质内的辐射换热

摘要

By using the finite volume method and the spectral band model, the coupled radiative-conductive heat transfer is numerically simulated in an absorbing, emitting, scattering and non-gray medium.The results for a one-dimensional scattering medium and a two-dimensional, cylindrical medium are compared with the results by the ray tracing method and the discrete transfer method, respectively. It is shown that the finite volume method is precise and suitable for the coupled heat transfer of radiation and conduction. The effects of the spectral band model, refractivity and albedo on the coupled radiative-conductive heat transfer is investigated.The spectral band model is suggested for the non-gray medium and the influence of refractivity on heat transfer should be considered.%将有限体积法与谱带模型结合，求解了吸收、散射性非灰介质内的耦合换热.经与光线踪迹法、离散传递法的计算结果比较表明：提出的数值方法具有较高的精度；有限体积法适合辐射导热的多场耦合计算；对非灰介质建议选用谱带模型；并应考虑折射率对传热的影响.