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Difference between Wall Shear Stress of No-slip and Rough Walls |
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March 3, 2018, 19:20 |
Difference between Wall Shear Stress of No-slip and Rough Walls
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#1 |
New Member
A E
Join Date: Dec 2015
Posts: 29
Rep Power: 10 |
Hi,
I have a very general question, does having a rough wall increase the wall shear stress value? I am using a sst k-w closure if that matters. Thanks, A E |
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March 4, 2018, 08:24 |
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#2 | |
Senior Member
Join Date: Dec 2017
Posts: 153
Rep Power: 8 |
Quote:
Well, it depends on the type of roughness. If its scale is small compared with the viscous some layer size, you can have skin friction drag reduction and this is called riblet effect. The topic is very well explained into the works by Jimenez (Turbulent flows over rough walls) and Garcia-Mayoral (drag reduction by riblets). Hope this help, AliE |
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March 5, 2018, 12:57 |
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#3 |
New Member
A E
Join Date: Dec 2015
Posts: 29
Rep Power: 10 |
Thanks for your reply. I will check out those.
Best, A E |
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Tags |
no slip condition, rough wall, sst k-omega, wall shear stress |
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