[bijan darbari]

Dear All

How can I calculate dv/dx in openfoam??


As noted in OpenFOAM programming guide, the gradient of a vector is a tensor as follow:



I think for calculating dv/dx, I must access the (2,1) component of tensor grad(U).

How can I access that component??

Best regards

[T.D.]

Hi,

You can access a tensor T value (XY component) at each cell index "i" of the mesh as the following:

forAll(mesh.C(), i)
{
cout << "T[" << i << "].component(tensor::XY) = " << T[i].component(tensor::XY) << std::endl;
}

the other components can be accessed by T[i].component(tensor::XX), T[i].component(tensor::YY), etc..

regards,

T.D.