FLUENT - How to access radiation temperature in a UDF

A user wants to access the radiation temperature in a UDF.
Solutions are available for P1 and DOM radiation models.
Radiation Temperature in a given cell (c,t)
- using the P1 radiation model:

pow(C_P1(c,t) / (4. * SIGMA_SBC), 0.25);

Herein, "C_P1(c,t)" is the "incident radiation".

- using the discrete ordinate ("disco") radiation model (DOM):

The incident radiation can be found in...


Thus, the radiation temperature can be calculated as...

pow( C_STORAGE_R_XV(c,t,SV_DO_IRRAD,0) / (4. * SIGMA_SBC), 0.25)

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