[CMHR]

Hi all,

I am performing a supersonic simulation where the fluid medium is N2 (nitrogen) gas rather than air.

I have changed the materials to nitrogen under the materials section; however, it just adds to the nitrogen and does not delete air. In addition to this I can not also delete air since it says that it is "still in use by created_material_7". This material is an interior part of the BC (boundary condition).

The warning that pops up is, " Pressure far-field boundary condition can only be used with ideal gas law. Please change either the boundary condition type or enable ideal gas law. Solver cannot proceed until this is fixed." This shows that it is taking air as a medium instead of nitrogen, and I don't want that to happen.

I would really appreciate if anyone can kindly assist me in this matter.

Thank you very much.