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March 7, 2012, 05:23 |
Diverging Eulerian Multiphase
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#1 |
Senior Member
siamak rahimi ardkapan
Join Date: Jul 2010
Location: Copenhagen, Denmark
Posts: 220
Rep Power: 17 |
I am simulating particles in the air.
The geometry is a room and a candle inside. When I try steady state, it shows from the beginning floating point. When I use Unsteady with low relaxation factors, it works to some extent, but whenever I change it to steady state, again it starts to diverge. Any advice is highly appreciated. Thanks |
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March 7, 2012, 17:51 |
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#2 |
Senior Member
Join Date: Oct 2009
Location: Germany
Posts: 636
Rep Power: 21 |
Looks like an Eulerian multiphase simulation, right?
In that case, run it laminar, it's very unstable when running it turbulent. Another try is to reduce under-relaxation factors to very very very low numbers. Or even better: Try both at the same time! I understand that's not satisfying, but unfortunately the Eulerian approach is very unstable under turbulent conditions. There are too much equations affecting each other. |
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March 8, 2012, 01:59 |
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#3 |
Senior Member
siamak rahimi ardkapan
Join Date: Jul 2010
Location: Copenhagen, Denmark
Posts: 220
Rep Power: 17 |
Thanks abdul099, it is so nice of you
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January 2, 2014, 12:12 |
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#4 |
Senior Member
Join Date: May 2011
Posts: 231
Rep Power: 15 |
Hi,
Did you get the solution with steady state? I have the same problem. can you help me! thanks in advance best! Kanarya |
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