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Error: Divergence detected in AMG solver: uds-0

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Old   September 25, 2013, 12:44
Default Error: Divergence detected in AMG solver: uds-0
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C.C
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CC
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Hi all,

I'm trying to modify the k and e equations in the k-e turbulence model using user defined scalars.
I obtained this error "Error: Divergence detected in AMG solver: uds-0
Error Object: #f" when I modify the viscosity to a non-newtonian viscosity.
The viscosity expression is:
viscosity=10*ShearRate^(-0.7).
The residuals for the continuity increases until the simulation stops.
If I teste an expression for viscosity like that viscosity=0.2*ShearRate^(-0.4)
the solution converges.
Please someone can help me? It is very important for me solve this question and I don't have any ideia why it is happening
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Old   June 29, 2015, 06:32
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Hello,
Did you got the solution to your problem
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Old   June 29, 2015, 08:09
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hi dear friend
i see this error when mesh isnt good. do u check your mesh?
is your mesh is suitable?
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