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Maximum number of iterations exceeded chtmultiregionsimpleFoam |
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#21 | |
Member
Vishnu
Join Date: May 2019
Location: Tamilnadu, India
Posts: 55
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Hi Peter,
Before setting the case, I need a clarification and solution for solid-fluid coupled interface creation. Quote:
Thank you, Vishsel Last edited by Vishsel; December 23, 2019 at 05:14. |
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#22 |
Senior Member
Peter Hess
Join Date: Apr 2011
Location: Austria
Posts: 250
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Are you executing toposet before you separate or not?
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#23 |
Member
Vishnu
Join Date: May 2019
Location: Tamilnadu, India
Posts: 55
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No I am not using topoSetDict.. Before that may i know purpose of the topoSet ?
If there are two solid region (s1 & s2) and one fluid region (f).. how to use it ? |
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#24 |
Senior Member
Peter Hess
Join Date: Apr 2011
Location: Austria
Posts: 250
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Well, you need to tell the splitMesh what is what.
Yes. You need to use topoSet. How do you generate the mesh? blockMesh? |
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#25 |
Member
Vishnu
Join Date: May 2019
Location: Tamilnadu, India
Posts: 55
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No i have generated the mesh in Ansys workbench
And i have used fluent3DMeshToFoam command for conversion |
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#26 |
Senior Member
Peter Hess
Join Date: Apr 2011
Location: Austria
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I see...
Did you use cutcell method? May be the Problem ist here? No, in this case you do not need topoSet! In the case you uploaded, in regionProberties there are Just two regions by the way. You need to add all regions by name there... Meshing and split regions from ansys Last edited by peterhess; December 26, 2019 at 13:21. |
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#27 |
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Pu Gong
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#28 |
New Member
Join Date: Jan 2020
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I have a similar issue. I run my calculation (one fluid (water) and two solids (pipe and soil)) on OF6 with chtMultiRegionFoam and with Euler and steady state I have the problem of negative initial temperatures or exceeded number of maximum iterations after certain timesteps. Depending on the settings of pressure it works fine for 500-2000 seconds, later it crashes.
I tried to use the bcs you mentioned Peter, but it is still not working. The mesh I checked already and it seems to be fine to me. In OF7 the same case is working without any error, but the timeoutput seems to be wrong. My fluid is flowing with 1m/s, but after 100 seconds it advanced in the pipe only a few centimeters and not 100 meters as it should do. I still believe the solution is hidden in the boundary conditions of pressure, but so far I could not figure out how to solve it. Could you be so kind and have a look at my case @Peterhess? Thank you in advance! |
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#29 |
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Derek Mitchell
Join Date: Mar 2014
Location: UK, Reading
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