Supersonic Outlet Boundary Conditions

dysd · February 24, 2020, 05:24

Hi everyone, I am a college student and I am working with SU2 as my end-of-degree project.

I am having trouble imposing the right BC in the outlet end when adapting the flatplate test case to a supersonic flow. I am trying to put Riemann BC but that's not working. I've also tried the MARKER_SUPERSONIC_OUTLET BC, but that doesn't seem to work either.

Could someone suggest how to approach this case?

wallym · February 24, 2020, 14:08

Hi Dylan,

What seems to not be working in your simulation?

In any case, I would suggest using MARKER_OUTLET. The supersonic outlet will not properly work since there should be an area of subsonic flow. Let me know if this helps.

Best,
Wally

dysd · February 25, 2020, 03:08

Thank you for your reply!

What happens is that the simulation converges to a wrong solution when I try with the Riemann BC. I've already tried the MARKER_OUTLET but in that case the simulation didn't even converge.

I could attach the .cfg file in case it helps.

February 24, 2020, 05:24	Supersonic Outlet Boundary Conditions	#1
dysd New Member Dylan Join Date: Feb 2020 Posts: 3 Rep Power: 6	Hi everyone, I am a college student and I am working with SU2 as my end-of-degree project. I am having trouble imposing the right BC in the outlet end when adapting the flatplate test case to a supersonic flow. I am trying to put Riemann BC but that's not working. I've also tried the MARKER_SUPERSONIC_OUTLET BC, but that doesn't seem to work either. Could someone suggest how to approach this case?

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February 24, 2020, 14:08		#2
wallym Senior Member Wally Maier Join Date: Apr 2019 Posts: 123 Rep Power: 7	Hi Dylan, What seems to not be working in your simulation? In any case, I would suggest using MARKER_OUTLET. The supersonic outlet will not properly work since there should be an area of subsonic flow. Let me know if this helps. Best, Wally

February 25, 2020, 03:08		#3
dysd New Member Dylan Join Date: Feb 2020 Posts: 3 Rep Power: 6	Thank you for your reply! What happens is that the simulation converges to a wrong solution when I try with the Riemann BC. I've already tried the MARKER_OUTLET but in that case the simulation didn't even converge. I could attach the .cfg file in case it helps.