|May 13, 2010, 18:45||
Friction velocity in Channel flow
Join Date: Dec 2009
Posts: 39Rep Power: 8
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: 18Rep Power: 7
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: 5
This may be useful to obtain the values you need:
y+ and u+ values with low-Re RANS turbulence models: utility + testcase
|Thread||Thread Starter||Forum||Replies||Last Post|
|Problem with laminar 2d channel flow||Quarkz||Main CFD Forum||6||October 7, 2015 12:24|
|Steady pipe flow mean velocity higher than inlet velocity||anita||OpenFOAM Running, Solving & CFD||7||September 25, 2012 05:35|
|LES In Turbulent in channel flow||pankaj saha||Main CFD Forum||8||April 15, 2009 11:34|
|Complex problem: Open Channel Flow||lett||FLUENT||17||April 9, 2009 10:56|
|what the result is negatif pressure at inlet||chong chee nan||FLUENT||0||December 29, 2001 06:13|