Residuals of continuity not converging

hjxy2012 · August 25, 2016, 22:45

Well, I'm solving a case like "flow over a cylinder". The residuals of continuity is not converging. Maybe there's not a steady state solution for this case. But I want to know the pressure drop. So how about performing a unsteady case?
I wonder if I can get a precise answer. Thank you.

D.M · August 26, 2016, 00:33

Hello ,
send a picture of your mesh here to see if it is a mesh problem or not.

hjxy2012 · August 26, 2016, 02:49

Quote:

Originally Posted by D.M

Hello ,
send a picture of your mesh here to see if it is a mesh problem or not.

The mesh is posted here. I didn't use inflations to keep the number of elements within a reasonable range. Thank you.

hjxy2012 · August 26, 2016, 23:30

Well, I set a monitor of inlet pressure and change the solution method from simple to coupled and the result is more stable.

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August 26, 2016, 00:33		#2
D.M Member Davoud Malekian Join Date: Jan 2016 Posts: 53 Rep Power: 10	Hello , send a picture of your mesh here to see if it is a mesh problem or not.

August 26, 2016, 23:30		#4
hjxy2012 New Member Green Join Date: Apr 2016 Posts: 27 Rep Power: 10	Well, I set a monitor of inlet pressure and change the solution method from simple to coupled and the result is more stable.