Ansys normally takes the Bulk Viscosity Coefficient (mu_b) as zero in all simulations. However, there are some cases of supersonic flows where mu_b is non-negligible. For such a case, how can we modify the momentum equations in Ansys to add the contribution of bulk viscosity ?
Prashant Grewal
I think in the density-based solver, there is a viscosity model like Sunderland 3 coefficient are given. You can chase as per your case setup.
0 votes
0 thanks
Prateek Gupta
Dear Prashant,
I checked out the Sutherland model. Apparently, it only takes into account the shear viscosity, not the bulk viscosity.
Will writing the bulk viscosity contribution as a source term UDF help?
1 votes
0 thanks
Prashant Grewal
Yes, if there is no option for bulk viscosity to add, then you may proceed with UDF.
0 votes
0 thanks
- Badges
- Science topic
More Prateek Gupta's questions See All
Similar questions and discussions