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definition norm of strain rate

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Old   September 17, 2010, 09:47
Default definition norm of strain rate
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Matthias Walter
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Hi,

the norm of the strain rate tensor is defined as mag(S) = sqrt( 2 * S_ij S_ij ) where S_ij = 1/2 ((grad(U)+grad(U)^T) = symm(grad(U)). OF defines mag(S) = sqrt(S_ij S_ij) , both expressions differ in the factor of sqrt(2).
However, it could be important for the determination of tau_ij in the turbulence models(i.e. Smagorinsky)!

Is it a possible bug?


best regards

Matthias
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Old   September 17, 2010, 10:07
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Mattijs Janssens
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We've finally got a proper bug reporting system :-)
Please report any OpenFOAM bugs on http://www.openfoam.com/bugs.

Thanks,

Mattijs
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