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Strain rate tensor

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Old   October 26, 2017, 05:15
Question Magnitude of Strain rate tensor
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Hi there,

Is there anyone know the correct formula for magnitude of strain rate tensor. Currently I'm using (sqrt(2)*mag(symm(fvc::grad(U))) but some said above equation is for second invariant of the strain rate tensor. The question is, should I stick with the equation above or there is another formula to determine magnitude of strain rate tensor.

Thank You

Last edited by kee555; October 30, 2017 at 10:05.
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