Radiation matrix method

这些 AUX12 命令用于计算辐射视图系数，并为辐射矩阵法创建辐射子结构。

Mapdl.emis([mat, evalu])	Specifies emissivity as a material property for the Radiation Matrix
Mapdl.geom([k2d, ndiv])	Defines the geometry specifications for the radiation matrix
Mapdl.mprint([key])	Specifies that radiation matrices are to be printed.
Mapdl.space([node])	Defines a space node for radiation using the Radiation Matrix method.
Mapdl.vtype([nohid, nzone])	Specifies the viewing procedure used to determine the form factors for
Mapdl.write([fname])	Writes the radiation matrix file.