How to plot a gradient.
in my study about a turbulent couette flow (including the energy equation for an incompressible flow) I would like to plot the heat flux in paraFoam (like U for instance). That's equivalent to plot the gradient of the temperature T. That's why I've tried to create a new field I call "gradT" which is a Volume vector Field and I've tried to solve the equation "gradT"=fvc::grad(T). But it doesn't work(It nevers works the first time ;)) and I receive the following error mesage:
Beta.C: In function ‘int main(int, char**)’:
Beta.C:140: error: no matching function for call to ‘Foam::fvMatrix<Foam::Vector<double> >::fvMatrix(Foam::tmp<Foam::GeometricField<Foam::V ector<double>, Foam::fvPatchField, Foam::volMesh> >)’
And I want to solve the following equation:
Maybe is there a better way to plot the gradient? I hope you will have some hints concerning my operator error message.
P.S: I'm not sure if that's the good section of the forum.
Thanks Santos that was the command I required.
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