Problem with convergence

Abhinand · July 20, 2017, 07:30

Hello guys,
I am simulating a supersonic flow over a flat plate with secondary injection. I have a good mesh (fully structured with good quality). I am using the density based solver to simulate the problem. I would need your help to sort out the convergence problem. The scaled residuals of energy continuity always keep shooting up and stay in high orders or magnitude.
Can you suggest any ideas how to converge the solution. I have tried increasing the courant number and changing the flux type to AUSM.

BCs
Inlet= Pres inlet
Outlet = Press outlet
Sides= Symmetry (No slip condn)
Plate = wall

Any help would be highly appreciated.
Thank you for your time

MayTheFlowBeWithYou · July 20, 2017, 07:55

Your outlet is a pressure inlet? really?

Abhinand · July 20, 2017, 10:02

Sorry about that, its pressure outlet

July 20, 2017, 07:30	Problem with convergence	#1
Abhinand Member Abhinand Join Date: Jun 2016 Posts: 75 Rep Power: 9	Hello guys, I am simulating a supersonic flow over a flat plate with secondary injection. I have a good mesh (fully structured with good quality). I am using the density based solver to simulate the problem. I would need your help to sort out the convergence problem. The scaled residuals of energy continuity always keep shooting up and stay in high orders or magnitude. Can you suggest any ideas how to converge the solution. I have tried increasing the courant number and changing the flux type to AUSM. BCs Inlet= Pres inlet Outlet = Press outlet Sides= Symmetry (No slip condn) Plate = wall Any help would be highly appreciated. Thank you for your time Last edited by Abhinand; July 20, 2017 at 10:01. Reason: Typo

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July 20, 2017, 07:55		#2
MayTheFlowBeWithYou Member I have to remain anonymous, I'm sorry. Join Date: Jun 2017 Location: The Netherlands, Delft University of Technology Posts: 48 Rep Power: 8	Your outlet is a pressure inlet? really?

July 20, 2017, 10:02		#3
Abhinand Member Abhinand Join Date: Jun 2016 Posts: 75 Rep Power: 9	Sorry about that, its pressure outlet