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divergence detected in AMG solver: temperature

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Old   January 27, 2007, 15:17
Default divergence detected in AMG solver: temperature
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zambroa
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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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Old   January 30, 2007, 00:52
Default Re: divergence detected in AMG solver: temperature
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pinks
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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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Old   September 11, 2009, 09:28
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bitak
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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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Old   September 11, 2009, 09:32
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Svetlin Philipov
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Look at solver options.... V, W.... which parameter is on divergence...
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Old   September 11, 2009, 10:06
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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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