CFD Online Discussion Forums

CFD Online Discussion Forums (
-   OpenFOAM Running, Solving & CFD (
-   -   Turbulent inlet fluctuation scale (

christian September 3, 2007 10:58

I'm using the turbulent inlet
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

kanarya April 2, 2008 06:08

hi to all, I m a beginner i
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

All times are GMT -4. The time now is 15:01.