Evaluating Heat Release of Reactions using FGM Model

How to evaluate the Heat release (W/m3) of the reactions using the FGM model in Ansys Fluent? Is there a way to access the FGM heat release from UDF?

The heat release rate is stored directly in the FGM tables for post-processing.

This value (in J/m3/s) is the summation over species for (H_f_j/Mw_j)*(w_dot_j) where j is the species index and w_dot_j is the volumetric rate for species j. (That is similar to the energy equation source term due to reaction).

You can also access this value for post-processing from a DEFINE_PDF_TABLE UDF. To do it, just use this call:

real HRR = Get_Pdf_HeatReleaserate (c, t);