*EMIS
r11, r12
r21, r22
...
r11: r*8: Emissivity value at temperature r12
r21: r*8: Emissivity value at temperature r22
This card assigns temperature dependent emissivity to account for heat loss via thermal radiation. For auto generated meshes (using *AUTM), radiation will be applied to all free surfaces. For manually generated meshes (using *INPU), if no surface convection is defined in the Patran input file, no radiation is applied even if the *EMIS card is used. Refer to the Units of Measure topic for questions about the units to use for this input.
A convection with zero convection coefficient can be applied on surfaces where there is no surface convection (e.g. in a vacuum).