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UDf and custom field variables

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Old   February 7, 2024, 15:32
Default UDf and custom field variables
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Hello everyone,


I want to write a UDF to obtain the velocity gradients G=dy/dx, then insert them into an equation, for example, R=G*effective_viscosity. My doubt is if I can do it in the UDF or if I can take G as an custom field variable to create the equation R.
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