Divergence in non-Newtonian fluid UDF -- CFD Online Discussion Forums

June 24, 2016, 07:48

Divergence in non-Newtonian fluid UDF

moabdi

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mohsen

Join Date: Jun 2015

Posts: 25

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Hi every body

I have written an UDF for define the viscosity for non-Newtonian fluid (Herschel-Baulkley). During run the project in steady state mode and after about 400 iteration divergence is accrued. what is your idea about that and what should i do?
how could reach convergence?

residual plot is attached.

Best Regards

Attached Images

Residuals.png (21.5 KB, 7 views)

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