Hello Waqas,
Please describe the geometry with screenshots. Please explain your final goal and how you have set-up your model. Please delineate your boundary conditions. Please show a screenshot what your mesh looks like.
Depending on the model, there are multiple reasons why you could be seeing divergence. You have to help us understand your model better so we can help you resolve this issue.
Thank you.
Best Regards,
Karthik
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