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divergence detected in AMG solver

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Old   February 2, 2009, 01:47
Default divergence detected in AMG solver
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azalina
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what d0es it means by divergence detected in AMG s0luti0n>>is there s0mething t0 d0 with multigrid??h0w can i av0id this thing??
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Old   February 2, 2009, 22:14
Default Re: divergence detected in AMG solver
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zongtwi
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Usually this means your simulation is diverging, which can be caused by many reasons. Mesh quality, discretizing and numerical schemes, initialisation, and others.

Please recheck your simulation, and try again. If that doesn't help, you might want to start with a simpler case, and use this case as the initial condition for your actual case. You can also try to reduce your under relaxation factors.

Hope that helps.
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Old   February 2, 2009, 23:45
Default Re: divergence detected in AMG solver
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azalina
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0whhh...thank y0u f0r y0ur help..u're right..i'd reduced the URF n its w0rk..
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Old   September 20, 2012, 13:33
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even i have the same problem..what do you mean by URF??
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Old   September 20, 2012, 17:50
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Quote:
Originally Posted by jonbonraki View Post
even i have the same problem..what do you mean by URF??
Under relaxation factors, try playing around with them.
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Old   September 20, 2012, 18:57
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Under relaxation factors, try playing around with them.
thanks i did..and it worked
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