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Alternatives for InterFoam - High Viscosity Ratio Problem |
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November 13, 2012, 15:30 |
Alternatives for InterFoam - High Viscosity Ratio Problem
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#1 |
Member
Saba Saeb
Join Date: Dec 2010
Location: Erlangen, Germany
Posts: 32
Rep Power: 16 |
Hi all,
The problem of InterFoam solver when it comes to two different materials with high viscosity ratio has been already discussed in another topic and is confirmed according to the following (bug) report : http://www.openfoam.org/mantisbt/view.php?id=156 Now, is there any other solver that can be used instead of InterFoam which doesn't make any problem in this special case? Your help and suggestions would be much appreciated. Cheers, Saba |
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November 13, 2012, 16:05 |
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#2 |
Senior Member
Kyle Mooney
Join Date: Jul 2009
Location: San Francisco, CA USA
Posts: 323
Rep Power: 18 |
Have you tried to implement additional PISO iterations or switch to a PIMPLE mode as the mantis report recommends?
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November 13, 2012, 16:12 |
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#3 |
Member
Saba Saeb
Join Date: Dec 2010
Location: Erlangen, Germany
Posts: 32
Rep Power: 16 |
Hi Kyle,
I tried both approaches suggested in the report, but as it is mentioned, it takes too much time and even worse, the problem doesn't converge at all when the viscosity ratio gets higher, like 10e5! Cheers, Saba |
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November 13, 2012, 17:57 |
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#4 |
Senior Member
Kent Wardle
Join Date: Mar 2009
Location: Illinois, USA
Posts: 219
Rep Power: 21 |
Not sure about this, but if you are looking for options you might try multiphaseEulerFoam instead. In that case each phase has it's own momentum equation rather than a shared velocity field as in interFoam. Not sure if this will help or hurt the problem, but it is another thing to try. I would be curious to hear of your results.
-Kent |
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