[Getdp] non symetric tensor - Hall effect
alain
al1.marty at yahoo.fr
Tue Aug 4 22:33:54 CEST 2009
Dear all,
I discovered recently this very interesting softwares, GMSH+Getdp.
To solve an electric 2D problems involving Hall effect, I started from
the example www.geuz.org/getdp/wiki/Anisotropy2D, but I set
non-symmetric off-diagonal terms in the tensor, ex :
"k[Sur]=Tensor[1,-0.5,0, 0.5,1,0, 0,0, 1];".
So doing the resolution did not converge with :
"Galerkin { [k[]*Dof{d n} ,{d n} ]; ..."
However multiplying the test function by the transposed matrix instead
of the Dof in
"Galerkin { [Dof{d n} ,kt[]*{d n} ]; ..."
or simply multiplying the test function by the identity matrix :
"Galerkin { [k[]*Dof{d n} ,id[]*{d n} ]; ..."
resulted in the convergence of the resolution.
Have you an idea why the test function has to be multiplied by a matrix
when non-symmetric non-diagonal terms ?
Thank's a lot
Alain M.
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