In 2D Model, Reaction in porous Zone, Error occurs on hooking UDF , DEFINE_VR_RATE in Fluent, .The error spikes just after running calculation after 1st iteration.
Divergence detected in AMG Solver:TEMPERATURE
Divergence detected in AMG solver species 0
and Divergence detected in AMG solver species 1...2..3..4
Floating point exception error object #f
Any solution for this, Any one come across such a situation in using UDF in FLuent?
It may be due to licences problem.
It's better to uninstall the software ANSYS and reinstall.
The same problem I had face, then I flow the above process.
It may be that the relaxation factor is too large, or the mesh quality is not enough, or the boundary type and boundary conditions are not given properly, or the solver is not suitable for porous media. There seems to be no authoritative explanation for this type of error.
Nasim Hasan and Yuan Tang Thank you for your reply.
Yes the divergence error can be due to the above-mentioned issues. But in my case it was due to the reaction rate too big. The temperature varies a lot during switching on the reaction and iterating. Due to this the reaction rate reaches a big value which is not realistic. In the UDF i made some min and max limit criteria and the issue solved now.
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