V-T relaxation for triatomic molecules #132

Hi All,
I would like to ask how V-T relaxation is implemented for triatomic molecules. There are several vibrational modes, how are the sources added up in the equation for vibrational energy? In which source files can I see the implementation of the equation for vibrational energy? And I would also like to ask, is it possible to consider the same molecule as several different chemical components, which correspond to different vibrational modes?