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Why Stress-strain rate is equal to Vorticity in Boundary Layer? |
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December 27, 2012, 22:17 |
Why Stress-strain rate is equal to Vorticity in Boundary Layer?
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#1 |
New Member
Aladdin
Join Date: Jan 2010
Posts: 26
Rep Power: 16 |
Why Stress-strain rate is equal to Vorticity in Boundary Layer?
Hi friends, Recently, I read some paper that said Stress-strain rate S is equal to Vorticity in Boundary Layer, Who can give me some expression about this. Thx. |
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December 28, 2012, 04:20 |
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#2 | |
Senior Member
Filippo Maria Denaro
Join Date: Jul 2010
Posts: 6,768
Rep Power: 71 |
Quote:
that is quite correct... consider a 2D flow over a flat plate, vorticity is z = du/dy - dv/dx, the stress at the wall is: tau_wall = mu*du/dy|w = mu*(z + dv/dx)|w. For a not permeable wall v=0 and tau_wall = mu*(z)|w |
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