Hello Amine:

Thank you for your response. 

1) Its a single phase multicomponent problem.

2) I did not set any reference density. The two components are Ethanol/Co2. Any ideas on what to use for their reference density?

3) Ansys Fluent.

4) Yes, if I neglect the overshoots the model result matches reasonably well with the exp data.

5) Yes. I am using UDF to specify the density & diffusion coefficient as a function of mass fraction.


Thank you again.