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divergence detected in AMG solver: temperature |
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January 27, 2007, 14:17 |
divergence detected in AMG solver: temperature
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#1 |
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i am simulating an ejector..in the initial part of the iteration..i get messages indicating reserved flow in 3 boundaries that i've set...the iteration stop when error occurs..the error says that divergence has been detected in AMG solver: temperature...can anyone tell me what that's mean...thank you
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January 29, 2007, 23:52 |
Re: divergence detected in AMG solver: temperature
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#2 |
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try to reduce URF of energy equations, say .9/.8. Use multigrid techniques/settings for initialisation and then start your run... Refer user guide for more details on multigrid settings.
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September 11, 2009, 09:28 |
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#3 |
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bitak
Join Date: Jul 2009
Posts: 56
Rep Power: 17 |
Hi.
I work on project about subsonic ejector like you. My solve is :air - couple - axisymetric - k-e rng - pressure inlet and outlet ideal gas - my presure inlet are 150 ,250 ,350 ,450 Kpa and out let is atmosphere. unfortunately my solve is divergence!!!!!!!!! really I need to your help. I change k-e to k-omega and pressure inlet to mass flow but devegence again.I know i have a shoke and so reverse flow in fluent. |
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September 11, 2009, 09:32 |
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#4 |
Senior Member
Svetlin Filipov
Join Date: Mar 2009
Location: United Kingdom
Posts: 176
Rep Power: 17 |
Look at solver options.... V, W.... which parameter is on divergence...
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September 11, 2009, 10:06 |
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#5 |
Member
bitak
Join Date: Jul 2009
Posts: 56
Rep Power: 17 |
temprature become really more!!! or absolute pressure become really less!
after doing some changes in my solve at now iteration is really more (>90000)!! how I can change my URF? you think what I do? my base solve is false? |
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