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problem with Axisymmetry simulation

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Old   October 16, 2013, 07:28
Default problem with Axisymmetry simulation
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I'm working on simulation of fluid in cylindrical vessel . I used Axisymmetric for that . when i run the calculation it keep giving (Error: Divergence detected in AMG solver: x-momentum) ,i used a fine mesh and reduced under relaxtion factor to 0.1 and it still give the same error .
when i switched to cartesian with the same setting it give the solution and the convergence was established !
can u help me please with this
thanx in advance
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