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Divergence detected in AMG solver: ads-0

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Old   August 25, 2011, 08:04
Default Divergence detected in AMG solver: ads-0
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hello,

i try to simluate a normal supersonic nozzle. everything worked fine before i wanted to improve my y+ value. therefore i increased the mesh size near the wall. if i run it now with the same values, i always get the error

Divergence detected in AMG solver: ads-0
Divergence detected in AMG solver: ads-1
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Divergence detected in AMG solver: ads-0
Error: floating point exception
Error Object: #f

would be glad if anyone could help me

br
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Old   August 25, 2011, 20:48
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Hi

Are you using the density based solver? Implicit or Explicit?

What AMG cycles are you running? V, W, F or flexi? Also did you increase the number of levels when you went up a mesh size?

Stu
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Old   August 26, 2011, 08:28
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Hello,

I'm using density based solver implicit. Also using standard V cycles and I didn't improve the levels when i increased the mesh size. I only increased the mesh size near the wall so I get a lower y+ value.
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Old   April 9, 2014, 10:40
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Hello Dear FRiends can you tell me what does level means
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Old   April 18, 2014, 01:53
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jake sawn
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how‘s going that error? hey,brother,i need your help
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Old   November 25, 2015, 09:04
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hey, i am facing the same problem. have u got the solution with uniform mesh size. before refining mesh near wall. and one more thing it is a problem with axi-symmetric case only. it work fine for planner case.
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Old   May 12, 2022, 03:11
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How to check AMG cycle type in fluent and how to change it?
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