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Turbulent inlet fluctuation scale

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Old   September 3, 2007, 11:58
Default I'm using the turbulent inlet
Christian Lindbäck
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I'm using the turbulent inlet boundary condition. One is supposed to give a fluctuation scale along with this b c. Could someone please tell me how the fluctuation scale is incorporated into my inlet b c as time goes by. Suppose I have given an x direction inlet velocity of 10 m/s and 0 in the other two directions, what does then a fluctuation scale of (0.05 0.05 0.05) mean? I'm especially interested in the y and z direction. Also, I assume the mass flow is conserved when fluctuating the inlet?

Best regards,
Christian Svensson
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Old   April 2, 2008, 07:08
Default hi to all, I m a beginner i
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hi to all,

I m a beginner in OpenFoam and I want to program fluctuations with
for example I want the following program to do with fluctuations.
magSqr(fvc::grad(U))+ sqr(gradU.component(tensor::YX) +

can someone help me?

best regards Emo
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