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wall shear stresses equations

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Old   November 20, 2022, 16:37
Question wall shear stresses equations
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Omidreza Taheri
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What are the equations that OpenFOAM calculates the wall shear stresses?
The following equation is mentioned in the OpenFOAM user guide

τ=Rn



R=Shear-stress symmetric tensor

n= Patch normal vector (into the domain)


but what are the equations by which R is calculated?


I need these equations to write in my thesis
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