[hbilal1076]

Please senior help me to resolve the shown error.
I will highly appreciate your help.

when I compile UDF and then click calculate, after 772 iteration it give the following error.

Divergence detected in AMG solver: enthalpy
Minimum PDF table enthalpy exceeded in 325733 cells on zone 2.
Maximum PDF table enthalpy exceeded in 17 cells on zone 2.

turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 268951 cells

Error at host: floating point exception

===============Message from the Cortex Process================================

Compute processes interrupted. Processing can be resumed.

================================================== ============================

Error: floating point exception
Error Object: #f

Calculation complete.


I have thesis submission in a week, please do favour and help me in solving this error. TIA

[AlexanderZ]

solution is diverged
there are several possible reasons for that:
1. UDF
2. Your case settings
3. Mesh quality

run simulation without UDF to check your settings and mesh quality
next run case with simplified UDF, clarify that it works
run everything -> now you know for sure that the problem is in UDF

you may share your UDF here, so users can check if everything is ok

[hbilal1076]

Dear Prof. Alexander,
My mesh quality is fine and there is no problem in my UDF. I am using nonpremixed combusion using coupled method, I am using UDF of WSGG radiation model to find the radiation influent on species and soot, I did one change and it's now working, I just changed K-Epsilon model from standard to realizable, however, I don't, know, if this change is correct or not?