|May 13, 2010, 18:45||
Friction velocity in Channel flow
Join Date: Dec 2009
Posts: 39Rep Power: 7
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
|April 10, 2013, 10:09||
Join Date: Feb 2011
Posts: 17Rep Power: 6
I'm interested in this as well. Have you found some way to plot u_plus( y+) for channel flow?
|April 11, 2014, 01:33||
Join Date: May 2013
Posts: 46Rep Power: 4
This may be useful to obtain the values you need:
y+ and u+ values with low-Re RANS turbulence models: utility + testcase
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