Saim Memon

Thank you Prof. Memon. Yes, finite element codes can simulate radiative processes but to implement those models it is necessary to know the radiative properties that we want to obtain. Indeed, we are interested in the calculation of the changes of emissivity with concentration in gass mixtures.

Have you looked at the HITRAN and HITEMP databases? They are freely available and might be a good starting point for the calculation of absorption spectra.

Why don't you design an experiment to measure the changes in those properties in the first place? Then you could build/choose a theoretical model.