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-   -   Maximum Iterations Exceeded while using rhoPorousMRFSimpleFoam (http://www.cfd-online.com/Forums/openfoam/111370-maximum-iterations-exceeded-while-using-rhoporousmrfsimplefoam.html)

 prasant January 5, 2013 04:12

Maximum Iterations Exceeded while using rhoPorousMRFSimpleFoam

Dear Foamers,

I am running the rhoPorousMRFSimpleFoam solver using OpenFOAM-2.1.1. My case is a impeller. I am giving the following boundary conditions:

inlet

U: pressureInletVelocity
p:totalPressure

Outlet

U: flowRateInletVelocity with negative value. So that it will acts as a outflow
p: fixedValue with a value of 101325.

And My case is nonConformal Mesh. say like impeller is hexahedral and casing is tetrahedral. So I had given cyclicAMI boundary condition. In this case I am not getting correct velocity at the inlet. So mass is imbalanced. I have checked at the interfaces. One side of patch that is on the casing side I am getting correct velocity and getting flow rate also. But other side velocity is not coming uniformly. I am using cyclicAMI with trasform noOrdering.

I have tried with snappyHexMesh by converting interfaces in to interior. In this case, Mass is getting balancing but after some iterations like after 126 Iter I am facing the issue like

Time = 126
smoothSolver: Solving for Ux, Initial residual = 0.0028758072, Final residual = 2.5767478e-05, No Iterations 4
smoothSolver: Solving for Uy, Initial residual = 0.002563926, Final residual = 2.3158849e-05, No Iterations 4
smoothSolver: Solving for Uz, Initial residual = 0.0026992734, Final residual = 2.5718448e-05, No Iterations 4
DILUPBiCG: Solving for h, Initial residual = 0.010145466, Final residual = 5.8752864e-07, No Iterations 1
[0]
[0]
[0] --> FOAM FATAL ERROR:
[0] Maximum number of iterations exceeded
[0]
[0] From function specieThermo<Thermo>::T(scalar f, scalar T0, scalar (specieThermo<Thermo>::*F)(const scalar) const, scalar (specieThermo<Thermo>::*dFdT)(const scalar) const) const
[0] in file home/OpenFOAM//OpenFOAM-2.1.1/src/thermophysicalModels/specie/lnInclude/specieThermoI.H at line 69.
[0]
FOAM parallel run aborting

Regards
Prasant.

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