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to find the residing time of fluid particle

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Old   December 30, 2008, 03:47
Default to find the residing time of fluid particle
Er. Remith
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Hi friends, I am using CFX5 for CFD analysis of fluid pump.One of the main parameters is time of particles flowing inside the pump. But there is no inbuilt variable as time or age. I create an user defined function with initial value zero at inlet. But the result is zero seconds at every point of the domain.Can anyone suggest a proper solution.?

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