OpenFOAM_FOAM FATAL ERROR

[Trần Văn Quang]

Hi guy,

I am running radiation heat transfer in buildings with solver "buoyantSimpleFoam". But I meet this problem."FOAM FATAL ERROR:

Maximum number of iterations exceeded: 100"

(I have attached the picture)

Could I ask you a question? how to handle this issue?

Thank you in advance.

I hope you are doing well

Best regard

[haruka tsubota]

The error message ("FATAL ERROR: Maximum number of iterations exceeded: 100") means that the calculation diverged.
I think you have 2 options to fix the problem.

1.
Changing relaxationFactors for each variable to be smaller in system/fvSolution file.

2.

Changing gradSchemes and divSchemes to be more stable in system/fvSchemes file.

I think the following settings may be more stable.

- gradSchemes: "faceLimited Gauss linear 1"
- divSchemes for div grad U: "Gauss linear"
- divSchemes  for other (U, k, epsilon...): "bounded Gauss upwind"

Good luck with your work.

2021年6月24日木曜日 2:28:27 UTC+9 tranvanq...@gmail.com:

[Trần Văn Quang]

Hi Haruka,

Thank you very much for your advice I have changed the relaxation factor and I fixed this error.