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Old   September 25, 2012, 06:30
Default About div(tensor)
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M Mallikarjuna Reddy
Join Date: Jul 2012
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Hi Foamers,
I have a doubt about laplacian and divergence. For many problems we write div(nu, grad(T)) simply as laplacian(nu, T).
For my application i need to write div(tensor), Which gives a vector field. But i am getting some error message as follows.

UEqn:-
tmp<fvVectorMatrix> UEqn
(
fvm::div(phi, U)
- fvc::div(2*nu*pow(1-T/0.68,-1.82), symm(grad(U)))
);


Error:-
UEqn.H:7:62: error: no matching function for call to ‘div(Foam::tmp<Foam::GeometricField<double, Foam::fvPatchField, Foam::volMesh> >, Foam::tmp<Foam::GeometricField<Foam::SymmTensor<do uble>, Foam::fvPatchField, Foam::volMesh> >)’
make: *** [Make/linuxGccDPOpt/sbm1Foam.o] Error 1

where symm(grad(U)) is rate of strain tensor.(1/2*(grad(U)+grad(U).T)).

please guide me to rectify this problem..

Thanks
Regards
Mallikarjuna
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