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March 27, 2012, 05:04
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Error message
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#1 |
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New Member
Amir sadeghi pour marvi
Join Date: Dec 2011
Posts: 25
Rep Power: 14  |
hi all
I am a new user for CFX so I might ask some stupid questions here. Sorry for that. my question is when I run the simulation...I got the message: turbulent viscosity limited to viscosity ratio of 1.000000e+005 in 1081594 cells What should I do? |
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March 28, 2012, 10:49
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#2 |
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New Member
Snail
Join Date: Mar 2012
Posts: 9
Rep Power: 14 |
change the viscosity ratio
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May 7, 2012, 02:15
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How we can change viscosity ratio?
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#3 |
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New Member
Himanshu Sharma
Join Date: May 2012
Posts: 8
Rep Power: 13 |
How can the viscosity ratio be changed in FLUENT 6.3?
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May 7, 2012, 02:22
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#4 |
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Senior Member
Join Date: Mar 2009
Location: Indiana, US
Posts: 186
Rep Power: 17 |
Reduce your under-relaxation parameters.
Which turbulence model are you using? Regards Luke |
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May 7, 2012, 02:28
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#5 |
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New Member
Himanshu Sharma
Join Date: May 2012
Posts: 8
Rep Power: 13 |
I have used standard k-omega model and unsteady DES
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May 7, 2012, 03:03
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#6 |
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Senior Member
Join Date: Mar 2009
Location: Indiana, US
Posts: 186
Rep Power: 17 |
By unsteady DES, do you mean a transient simulation?
1) Try reducing your under relaxation factors 2) Start your simulation with the standard k-epsilon model and later switch to k-omega 3) If your run is transient, then try reducing your time step regards Luke |
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May 7, 2012, 05:45
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Done all
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#7 |
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New Member
Himanshu Sharma
Join Date: May 2012
Posts: 8
Rep Power: 13 |
Dear Mr. Luke,
As per your recommendations I have tried: 1) reducing under relaxation factors 2) Started simulation with the standard k-epsilon model but observed oscillations persisted 3) By running transient run solution diverged Kindly acknowledge me with your suggestions regards Himanshu |
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