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... C_STORAGE_R_XV(c,t,SV_DO_IRRAD,0) Thus, the radiation temperature can be calculated as... pow( C_STORAGE_R_XV(c,t,SV_DO_IRRAD,0) / (4. * SIGMA_SBC), 0.25) 

