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Old   June 28, 2013, 08:48
Default Maximum Number of Iteration exceeded
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Rahul Soni
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Hello Everybody,

I am trying to solve supersonic flow over backstep using rhoCentralFoam and sonicFoambut I m faced with this strange problem :

The error is:
--> FOAM FATAL ERROR : Maximum number of iterations exceeded

From function specieThermo<thermo>::T(scalar f, scalar T0, scalar (specieThermo<thermo>::*F)(const scalar) const, scalar (specieThermo<thermo>::*dFdT)(const scalar) const) const
in file /home/liu/OpenFOAM/OpenFOAM-1.2/src/thermophysicalModels/specie/lnInclude/specie ThermoI.H at line 83.

FOAM aborting

Looking forward to constructive suggestions.

Thanks
Rahul
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Old   June 28, 2013, 09:30
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Hi Rahul,

Are you creating your mesh with some other software and importing it to OpenFoam?
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Old   June 29, 2013, 02:06
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Hello kilroy,

Thanks for posting, I am creating mesh in gambit.
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Old   June 29, 2013, 02:09
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You may want to look into Dinesh's post below:

FOAM FATAL ERROR Maximum number of iterations exceeded

"This problem came when I was using the number of interval more than 150 or so, in gambit, the exported mesh to OpenFoam was showing that error message i. e ..Maximum number of iterations exceeded..bla bla.......
before this it was running upto clock time 5 or 6 and than the error message. If I change the mesh intervals, the clock time of getting that massage had been changing accordingly. When I change the mesh intervals in gambit in 100 it worked i.e upto requried time ( ..which I had set in controlDict .....

Conclusion : change (decrease) the mess interval count in gambit. the exported mesh shall let u find the way...."

Hope this helps,

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Old   June 29, 2013, 03:12
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Rahul Soni
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Hi

I have aleardy referred to this post, however I had no luck.

Thanks
Rahul
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Old   June 29, 2013, 03:15
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Rahul,

Have you ever tried creating your own mesh by OpenFoam's utilities (blockMesh, snappyHexMesh, etc.)?
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Old   June 29, 2013, 03:48
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Hi,

I haven't tried that, but there's guy in my lab he works with that and he too faced similar problem.

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