Residuals in inviscid solution not converging

ari003 · June 24, 2019, 06:49

Problem statement- There are two airfoil separated by some specified amount of distance and I am supposed to take the reading of Cl of both of the airfoil at different angle of attack while the interaction of one airfoil over the other persists.
I started with inviscid model but the result is very dissatisfying. The residuals are not converging, Cl monitor is oscillating heavily but the mass flux is under control. I tried the successive attempt by reducing the Pressure and momentum relaxation factor but the problem still continued. In the console window the statement is appearing " Stabilizing pressure coupled to enhance linear solver robustness.", don't know what does it mean. Any kind of help will be really appreciated.

ngoctm · June 25, 2019, 05:22

Hi Arijit,

Your problem may be the same here:

Divergence detected in AMG solver: temperature

June 24, 2019, 06:49	Residuals in inviscid solution not converging	#1
ari003 Senior Member Arijit Saha Join Date: Feb 2019 Location: Singapore Posts: 132 Rep Power: 7	Problem statement- There are two airfoil separated by some specified amount of distance and I am supposed to take the reading of Cl of both of the airfoil at different angle of attack while the interaction of one airfoil over the other persists. I started with inviscid model but the result is very dissatisfying. The residuals are not converging, Cl monitor is oscillating heavily but the mass flux is under control. I tried the successive attempt by reducing the Pressure and momentum relaxation factor but the problem still continued. In the console window the statement is appearing " Stabilizing pressure coupled to enhance linear solver robustness.", don't know what does it mean. Any kind of help will be really appreciated.

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June 25, 2019, 05:22		#2
ngoctm Member Join Date: Mar 2009 Location: Vietnam Posts: 36 Rep Power: 18	Hi Arijit, Your problem may be the same here: Divergence detected in AMG solver: temperature