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June 5, 2010, 11:09
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Reynolds Stresses in Fluent
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#1 |
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New Member
Join Date: Jun 2010
Posts: 4
Rep Power: 5  |
Hello,
I am working the Re=3900 2-D cylinder problem for a turbulence class in graduate school. We were to use the k-e and k-w turbulence models and plot uu Reynolds stress profiles to compare to Kravchenko's paper. How do I back out the Reynolds stress components I need from the turbulent quantities given by these two models? I imagine I just use the Bouss Approx, and write a UDF to plot them, but I've never used the UDF's. Can someone give me some idiot-proof step by step instructions on how to do this? Thanks! |
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January 10, 2011, 14:31
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#2 |
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New Member
Smith, John
Join Date: Nov 2010
Posts: 8
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i have the same question right now
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February 1, 2012, 09:50
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Same doubt
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#3 |
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New Member
Andre Novgorodcev
Join Date: Jan 2012
Posts: 3
Rep Power: 3 |
I'm facing the same problem right now.
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February 1, 2012, 12:57
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#4 |
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New Member
Join Date: Mar 2011
Posts: 6
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You have to use Bous. Approx.
Use the Define->Custom Field Functions to calculate delu=dx-velocity-dx + dy-velocity-dy + dz-velocity-dz then calculate strain rate tensor S_uu S_uu=dx-velocity-dx - 1 / 3 * dukxk Then use -u'u'=2*viscosity-turb*S_uu/density - 2/3*turb-kinetic-energy |
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| Tags |
| boussinesq, reynolds, stress |
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