Rheolef  7.2
an efficient C++ finite element environment
 
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diffusion_tensor_error.cc

The tensor diffusion benchmark – error computation.

The tensor diffusion benchmark – error computation

#include "rheolef.h"
using namespace rheolef;
using namespace std;
int main(int argc, char**argv) {
environment rheolef (argc, argv);
Float tol = (argc > 1) ? atof(argv[1]) : 1e-10;
field sigma_h;
din >> catchmark("sigma") >> sigma_h;
const geo& omega = sigma_h.get_geo();
size_t k = sigma_h.get_space().degree();
iopt.set_family(integrate_option::gauss);
iopt.set_order(3*(k+1));
Float err_l2 = sqrt(integrate (omega, norm2(sigma_h - sigma_exact()), iopt));
space Th1 (omega, "P"+itos(3*(k+1)), "tensor");
field eh = interpolate(Th1, sigma_h - sigma_exact());
Float err_linf = eh.max_abs();
derr << "err_l2 = " << err_l2 << endl
<< "err_linf = " << err_linf << endl;
return (err_l2 < tol) ? 0 : 1;
}
see the Float page for the full documentation
see the field page for the full documentation
see the geo page for the full documentation
see the catchmark page for the full documentation
Definition catchmark.h:67
see the environment page for the full documentation
see the integrate_option page for the full documentation
void set_family(family_type type)
see the space page for the full documentation
The tensorial diffusion benchmark – right-hand-side and exact solution.
int main()
Definition field2bb.cc:58
This file is part of Rheolef.
STL namespace.
rheolef - reference manual