APPROXIMATE FORMULATION FOR COUPLED CONDUCTION AND RADIATION THROUGH A MEDIUM WITH ARBITRARY OPTICAL THICKNESS
APPROXIMATE FORMULATION FOR COUPLED CONDUCTION AND RADIATION THROUGH A MEDIUM WITH ARBITRARY OPTICAL THICKNESS
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DOI：
10.1115/1.2822655
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发表时间：
1995-08
影响因子：
--
通讯作者：
S. Q. Zeng;A. Hunt;R. Greif;W. Cao
中科院分区：
文献类型：
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作者：
S. Q. Zeng;A. Hunt;R. Greif;W. Cao
在评估一些多孔介质（如气凝胶）的热性能时，由于以下原因会出现困难：(1)介质在某些光谱区间是透明的，而在其他区间是不透明的，因此不能将其视为光学薄或光学厚；(2)导热与辐射传热耦合。一般来说，非灰壁非灰介质中的耦合传导和辐射输运是用非线性的积分微分方程来描述的，该方程很难求解。参9。图1。
In evaluating the thermal properties of some porous media, such as aerogels, difficulties arise due to the following: (1) The media are transparent in some spectral intervals and opaque over other intervals and cannot therefore be treated as optically thin or as optically thick; (2) the conductive and the radiative heat transfer are coupled. In general, the coupled conduction and radiation transport in a nongray medium with nongray walls is described mathematically by a nonlinear, integrodifferential equation, which is difficult to solve. 9 refs., 1 fig.