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Forum: OpenFOAM Programming & Development

August 21, 2015, 12:52

Replies: 8

Magnitude of a tensor

Views: 16,975

Posted By rudolf.hellmuth

I think that I might have figure out the...

I think that I might have figure out the confusion here.

The magnitude of a tensor is:
mag(T) = sqrt(T:T) = sqrt(tr(T·T))

In the case of the strain rate, that is valid as well. However, the...

Forum: OpenFOAM Programming & Development

August 16, 2015, 08:57

Replies: 8

Magnitude of a tensor

Views: 16,975

Posted By rudolf.hellmuth

This is still a mystery for me. I've got to the...

This is still a mystery for me. I've got to the same point as you have. I cannot prove the equality in a reasonable way, just by the sanity check.

I've got to these relations with Einstein's...

Forum: OpenFOAM Programming & Development

February 9, 2015, 09:06

Replies: 8

Magnitude of a tensor

Views: 16,975

Posted By rudolf.hellmuth

I have the same question here. In...

I have the same question here.

In viscosityModel.C, strain rate is defined as

Foam::tmp<Foam::volScalarField> Foam::viscosityModel::strainRate() const
{
return...

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