!SRADIATE¶

Defines the radiation coefficient by surface group.

Parameters¶

AMP1 = radiation coefficient history table name (specified with !AMPLITUDE)
AMP2 = ambient temperature history table name (specified with !AMPLITUDE)

** Second and subsequent lines **

(2nd line) SURFACE_GRP_NAME, Value, Sink

Example¶

!SRADIATE
  RSURF, 1.0E-9, 800.0
!SRADIATE, AMP2=TSRAD
  RSURF, 1.0E-9, 1.0

Notes¶

• Radiation boundary conditions are based on the Stefan-Boltzmann law, and the heat flux is calculated by converting the temperature to absolute temperature. The absolute zero used for the conversion is specified by !ZERO in the mesh file, not in the analysis control file.
• When temperatures are entered in degrees Celsius, !ZERO may be omitted (default value: -273.15). When temperatures are entered in kelvins, specify 0.0 for !ZERO.
• Value (radiation coefficient) must also be specified in the same unit system as the input temperature.

See Also¶

• !RADIATE
• !ZERO
• !SFILM