I've these errors and I tried so long to fix it but I couldn't .. I don't know what's the problem can anyone help me plzzz :-
# Divergence detected in AMG solver: temperature -> Increasing relaxation sweeps! # You may try the enhanced divergence recovery with (rpsetvar 'amg/protective-enhanced? #t)
Error: Divergence detected in AMG solver: temperature
Error: Divergence detected in AMG solver: temperature Error Object: #f
you are using Ansys CFX or Fluent. I think you can remove this error in CFX
Ahmed El-Shafei Can you share more details on the CFD model you are using, like the mesh quality, boundary conditions etc.
This error can be due to multiple reasons like mesh issues (high skewness/aspect ratio), unrealistic boundary conditions, high URF etc.
Are you getting this error immediately once your simulation starts or is it after some iterations?
Thanks & Regards,
Rajesh.
Hmmm. Jet Impingement Cooling? Are you trying to cool a very hot surface with temperature about the Leidenfrost temperature of the liquid? I.e. with a temperature which is substantially above the evaporation temperature? If yes, than I have doubt, that the ANSYS Fluent solver can survive such a situation. But I have seen already such simulations in ANSYS CFX.
@ Rajesh Alayil I think the mesh is good enough for my analysis ( I am getting acceptable orthogonality and skewness within range 0.8522 & 0.24862 respectively ) and the boundary conditions are set both outlet pressure and inlet velocity. I'm getting this error after 9 or 10 iterations.
@ Thomas Frank “ I have done as suggested and used CFX for the first time in my life, the error disappeared like you said and I managed to get some sort of results. the problem is that I can't select v2f turbulence model as there is only two turbulence options available in CFX and I am sorry to say I am not very familiar with the solver so I can't obtain nusselt number from CFD post. and frankly I was wondering is it the same kind of results I can get from a CFD simulation
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