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Why negative wall shear stress for flow past plate? |
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October 27, 2022, 23:06
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Why negative wall shear stress for flow past plate?
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Senior Member
TWB
Join Date: Mar 2009
Posts: 400
Rep Power: 19  |
Hi,
I simulated a simple case of flow past flat plate using simpleFoam 2D. Re is 100 It starts with slip BC 1st before encountering the flat plate wall. I enabled the calculation of wall shear stress too. However, the results on Paraview shows that the wall shear stress x is negative. May I know why this is so? Shouldn't it be positive? There's no flow separation. I have attached a figure |
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