3D LES - Error: Divergence detected in AMG solver

leonidassr · February 13, 2014, 11:54

I am working on a 3D LES and after almost 30 iterations I constantly have the continuity residual blowing up.
The message I get is: "Error: Divergence detected in AMG solver".

I was initially using a second order implicit scheme and relaxation factors of 10^(-6).
I tried switching to first order implicit and relaxation factors of 10^(-4), but still the same problem occurs.
Any ideas?

leonidassr · February 14, 2014, 04:50

I should also mention that my mesh is structured and that I am using periodic boundaries. By reading other threads I understand that this might also be a source of the problem.

February 13, 2014, 11:54	3D LES - Error: Divergence detected in AMG solver	#1
leonidassr New Member Leonidas Siozos-Rousoulis Join Date: Jan 2013 Location: Brussels, Belgium Posts: 11 Rep Power: 13	I am working on a 3D LES and after almost 30 iterations I constantly have the continuity residual blowing up. The message I get is: "Error: Divergence detected in AMG solver". I was initially using a second order implicit scheme and relaxation factors of 10^(-6). I tried switching to first order implicit and relaxation factors of 10^(-4), but still the same problem occurs. Any ideas?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Divergence detected in AMG solver: ads-0	Patrino	FLUENT	6	May 12, 2022 03:11
Error: Divergence detected in AMG solver: pressure correction	wanna88	FLUENT	19	April 6, 2016 02:57
Divergence detected in AMG solver: pressure correction	xinquanzhoucn	FLUENT	5	July 21, 2014 04:49
Divergence detected in AMG solver: pressure coupled	n.jithin.1991	FLUENT	6	January 5, 2014 11:43
Error: Divergence detected in AMG solver: x-momentum/ epsilon/ temperature	bubuchacha	FLUENT	6	February 26, 2013 03:30

February 14, 2014, 04:50		#2
leonidassr New Member Leonidas Siozos-Rousoulis Join Date: Jan 2013 Location: Brussels, Belgium Posts: 11 Rep Power: 13	I should also mention that my mesh is structured and that I am using periodic boundaries. By reading other threads I understand that this might also be a source of the problem.