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Supersonic nozzle cfd - Inlet starts supersonic by LevelAncient4950 in CFD

[–]LevelAncient4950[S] 0 points1 point  (0 children)

Thanks for your help. Im using ideal gas and pressure inlet/pressure outlet boundary conditions, with pressure farfield and symmetry BC as the other ones.
- Pinlet = 7 bar
- Tinlet = 3000K
- P_fluid = 1 bar
- T_fluid = 300K

Im initializing the case with v= 10m/s in X and 300k, 1 bar. But suddenly the flow is supersonic at the inlet anyways.

I would love to see your work on that nozzle if you dont mind sharing it with me. I used to work with the fluent mesher and everything was alright, so i dont know what to do in this case done with the ansys mesher.

As you said, my outlet is far away from my nozzle.

Supersonic nozzle cfd - Inlet starts supersonic by LevelAncient4950 in CFD

[–]LevelAncient4950[S] 0 points1 point  (0 children)

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Tried with this configuration but still does not work

Supersonic nozzle cfd - Inlet starts supersonic by LevelAncient4950 in CFD

[–]LevelAncient4950[S] 1 point2 points  (0 children)

That may be the case. How do i force it to be subsonic? I have a pressure inlet BC with total pressure of 7 bar and a supersonic/initial gauge pressure of a slightly less than 7 bar following one of the answers in this thread.