Hello! I implemented the turbulence modelling including temperature source term near the wall.(in case of standard k-epsilon model). Thus, I wish to compare calculated result with other published data concerning the natural convection problem. Would you like to inform me the simplest model. Again, It is the turbulence natural convection problem that I want to look for. Thank you.

At high temeperatures, a radiation model provides temperature source term (radiative energy source term)

you can use discrete ordinates method as radiation model for incorporation into your CFD code. It gives acceptable accuracy with computational economy.

NURAY KAYAKOL