I am working on a Flame Combustor, I want to add "radiation" to my model. my supervisor suggested me to use P1 radiation modeling using User Define Scalars (UDS) from fluent manual under three different conditions i.e. (1) Optical Thin Assumption Model (OTA) (2) Narrow Band Correlated K- Distribution Model (NBCK) and (3) Full Spectrum Correlated K- Distribution Model (FSCK).

Although I have fluent manual but as I don't have any programing knowledge/skill to use "User Define Function (UDF)" for above three condition.

In summary, how radiative source term can be added into energy equation for above model using macro define source?

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