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turbulent channel flow with spanwise oscillating velocity boundary condition

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Old   August 5, 2013, 07:13
Question turbulent channel flow with spanwise oscillating velocity boundary condition
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Hello foamers,

I'm trying to validate Stokes second problem, which is a turbulent channel flow with the bottom and top walls in spanwise oscillation. To do this, I have changed the oscillatingFixedValue already implemented in the software.
I have changed from Vwall=1+Asinwt to Vwall=Asinwt in the 0/U directory for the bottom and top walls. My results are not so good and I am currently wondering whether I should change the 0/k file ?
As the turbulent kinetic energy k is only linked to the fluctuations, k=1/2*(u'2 +v'2+w'2), do the wall movements keep k=0 on the walls? Or does it introduce a sinusoidal value of k?

Thanks for your help !

Last edited by arnaud6; August 5, 2013 at 14:16.
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Old   August 5, 2013, 14:18
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I precise that I am using LES with OneEqEddy (like in the channel395 tutorial case) and working at a Retau=200.
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boundary condition, channel flow, oscillatingfixedvalue, spanwise, value of k

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