coupling vibrational relaxation to fluid flow

 Dear Gurus,
 I need help... One of our customers needs a piece of software.
 The problem involves coupling vibrational relaxation effects to
 fluid flow of a gas (say oxygen). Is there a piece of software which
 would perform vibrational kinetics using SSH theory (or whatever which
 works well enough), so it is possible to solve conservation equation for
 oxygen along with the equation of motion. The conservation equation for
 oxygen will have source term made up of v-t and v-v energy transfers.
 They would like to model these energy transfers using the latest
 modeling approaches in this field.
 If you have any pointers, I will die (hopefully not before I can relay
 this information) indebted.
 Jan Labanowski
 jkl -x- at -x-