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How to apply a function as boundary condition

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Old   January 13, 2009, 04:50
Default Dear Foamers, I'm a newbie
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Chuang Gao
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Dear Foamers,
I'm a newbie here. For my question, I want to add a function with time and circumferential position as the variables for the inlet boundary condition.
The study object is a circular ring and the inlet radius is R2 while the outlet one is R3. The inlet condition should be V2=V_mean+sin(Omega*t+phi), in which the Omega is the angular velocity and a constant in this expression. V_mean and phi (initial position) are also constants, t is the time for unsteady calculation. Can such kind of boundary condition be given? For fluent, this is very easy through using the UDF.
Thanks all.
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