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Old   March 28, 2021, 22:39
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I am trying to write a UDF that relates the diameter to the viscosity through an empirical equation. Viscosity will be continuously changing along the segment's length.

The geometry is 3D irregular geometry (cannot be defined by a function). Maybe if I used the area-averaged velocity I can find the diameter?

Any help on how to find the area-averaged velocity to use it in the UDF function?
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