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How to model a moving elliptical belt in fluent?

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Old   April 26, 2018, 16:55
Default How to model a moving elliptical belt in fluent?
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Hello everyone,

I am working on modelling mixed convection inside a square cavity. The cavity sides are all stationary except its top surface.

The top surface is an elliptical belt that moves with a constant linear velocity. The problem is that the x and y velocity components of this moving belt are varying with position.

I have the equations of these components as a function of x and y. But these equations contain "tan^-1 (y/x)" and I don't know how to enter it into fluent.

Please help me.
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cavity, moving wall, udf

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