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udf problem (urgent)

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Old   April 12, 2009, 12:05
Exclamation udf problem (urgent)
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I am working on a vof case in which i have a tank filled with water up to 50%. i want to define a function to put a sinusoidal velocity for the first 30 seconds. I have tryed with the function showed bellow, but it does not work. I have two question:
Is this the correct way to get variable time?
Do you have to define in your source code, x_velocity if you know that it already exist for fluent program?

real current_time;
real x_velocity;

thanks in advance
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