Hello,
Once you estimate the temperature as part of your solution, you can activate additional viscosity models under material properties. There are some models in Fluent which are dependent on the temperature like the Sutherland model, Power-law model or the simple polynomial model. If the material you are using a different viscosity model, you should be able to use the User Defined Function (UDFs) to code this up in Fluent. Please check out additional details about these models in the Fluent Theory Guide.
Thank you.
Best Regards,
Karthik
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