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Divergence detected in AMG solver: pressure correction |
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February 20, 2013, 12:40
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Divergence detected in AMG solver: pressure correction
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#1 |
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New Member
Xinquan
Join Date: Feb 2013
Posts: 4
Rep Power: 13  |
Hi,
I was trying to run multiphase flow simulation with interfacial transfer modeling. When I added more interfacial transfer terms into play and tried to run the calculation. A problem window pops up and the errors are shown below. # Divergence detected in AMG solver: mp-x-momentum -> Decreasing coarsening group size! # Divergence detected in AMG solver: mp-x-momentum -> Increasing relaxation sweeps! Interrupting... # Divergence detected in AMG solver: pressure correction -> Turning off correction scaling! # Divergence detected in AMG solver: pressure correction -> Increasing relaxation sweeps! I was trying to adjust the solution controls-multigrid but it seemed that it didn't work at all. I was wondering if there is anyone knowing how exactly I should tune all these parameters. Thank you a bunch. Your advise will be appreciated! |
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July 18, 2014, 09:31
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pressure correction
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#2 |
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New Member
azadehkhalili
Join Date: Apr 2014
Posts: 5
Rep Power: 12 |
Hi
I have the same problem of: Divergence detected in AMG solver: pressure correction in an Eulerian multiphase model. can you solve it? I don't have any idea about that. could someone explain me more what is it about? thanks. |
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July 21, 2014, 04:38
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#3 |
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New Member
Jackson Sim
Join Date: Apr 2014
Posts: 7
Rep Power: 12 |
I have heard from others that using eulerian model with multiphase flow will result in divergence with steady state flow.
Why not try using transient flow with small step time? |
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July 21, 2014, 04:44
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#4 |
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New Member
azadehkhalili
Join Date: Apr 2014
Posts: 5
Rep Power: 12 |
Hi
thank's for your answer. I have done this case with unsteady flow too but again this error apeared. I don't know what do i do any more. |
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July 21, 2014, 04:47
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divergence detected in AMG Solver
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#5 |
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Member
Join Date: Nov 2012
Location: Kuala Lumpur
Posts: 33
Rep Power: 13  |
Hi,
My idea is problem in your mesh...The same case happened with me also...also try reducing the under relaxation parameters...hope this works..... |
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July 21, 2014, 04:49
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#6 |
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New Member
azadehkhalili
Join Date: Apr 2014
Posts: 5
Rep Power: 12 |
thank's alot for your help.
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