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April 11, 2010, 09:39 |
Plotting u+ versus y+
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#1 |
Senior Member
Join Date: Nov 2009
Posts: 111
Rep Power: 16 |
Hi everybody
I would like to plot u+ against y+ to have the velocity profile near the walls. Did anybody already try that? Normally this shouldn't be too difficult but I don't know how I cant get certain values : y+ = U_tau * y / nu u+ = U/U_tau with U_tau = sqrt (Tau_wall / rho) I think that : Since I'm in a incompressible case rho & nu are no problem Tau_wall : wallShearStress command in openfoam y : I can create it myself if needed U : How can i get it as U(y) (since it's what I need for the plot) ? Thanks for your help |
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December 18, 2012, 02:18 |
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#2 |
New Member
Reza Rastan
Join Date: Dec 2012
Location: Shanghai, China
Posts: 1
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Hi
That's my problem too.how can I achieve the first grid data from wall? |
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December 18, 2012, 05:00 |
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#3 |
Senior Member
Bernhard
Join Date: Sep 2009
Location: Delft
Posts: 790
Rep Power: 21 |
On this forum you will be able to find some threads about calculating yPlus. But I assume you can also do it in a post-processing step when you extract (y,u) data from your case?
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January 22, 2013, 22:03 |
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#4 |
Senior Member
Daniel P. Combest
Join Date: Mar 2009
Location: St. Louis, USA
Posts: 621
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As Bernhard mentioned, there are threads where this is discussed. Try for instance the thread http://www.cfd-online.com/Forums/ope...-testcase.html
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