[impecca]

Dear Foamers.

I use a pisoFoam based solver and have turbulent inlet boundary(using LES), I hope the turbulence doesn't decay or develop through channel.(like channelFoam)

To normalize the result, I need to know the friction velocity(u_tau or u*).
when I use channelFoam, I can output the dpdx in each time, so from there I could calculate the friction velocity. but pisoFoam case, I have no idea.
So, I am wondering is there any utility to calculate friction velocity.
or equivalent properties. (i.e. u_tau^2 = dp/dx*h = tau_w/rho, where h is half depth of channel)

Thank you very much
Yusik