Domaine_PolyMAC_MPFA.h

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#ifndef Domaine_PolyMAC_MPFA_included
#define Domaine_PolyMAC_MPFA_included
 
#include <Domaine_PolyMAC_HFV.h>
 
class Domaine_PolyMAC_MPFA : public Domaine_PolyMAC_HFV
{
  Declare_instanciable(Domaine_PolyMAC_MPFA);
public :
  void discretiser() override;
 
  //stencil of the face gradient fgrad: fsten_eb([fsten_d(f), fsten_d(f + 1)[]) -> elements e, boundary faces ne_tot + f
  void init_stencils() const;
  mutable IntTab fsten_d, fsten_eb;
 
  //for a scalar field T at elements, interpolates [n_f.nu.grad T]_f
  //while exactly preserving fields satisfying [nu grad T]_e = const.
  //Inputs : N             : number of components
  //         is_p          : 1 if treating the pressure field (swap Neumann / Dirichlet)
  //         cls           : boundary conditions
  //         fcl(f, 0/1/2) : boundary condition data (type, index, local index) (cf. Champ_{P0,Face}_PolyMAC_MPFA)
  //         nu(e, n, ..)  : diffusivity at elements (optional)
  //         som_ext       : list of vertices to skip (e.g. direct treatment of Echange_Contact in Op_Diff_PolyMAC_MPFA_Elem)
  //         virt          : 1 if also wanting flux at virtual faces
  //         full_stencil  : 1 if wanting the full stencil (for dimensionner())
  //Outputs: phif_d(f, 0/1)                       : indices in phif_{e,c} / phif_{pe,pc} of the flux at f in [phif_d(f, 0/1), phif_d(f + 1, 0/1)[
  //         phif_e(i), phif_c(i, n, c)           : local indices/coefficients (no Echange_contact) and diagonal (independent components)
  void fgrad(int N, int is_p, const Conds_lim& cls, const IntTab& fcl, const DoubleTab *nu, const IntTab *som_ext,
             int virt, int full_stencil, IntTab& phif_d, IntTab& phif_e, DoubleTab& phif_c) const;
 
  //MD_Vectors for Champ_Face_PolyMAC_MPFA (faces + d x elems)
  MD_Vector mdv_ch_face;
 
protected:
  mutable int first_fgrad_ = 1; //to print the "MPFA-O MPFA-O(h) VFSYM" message only once per computation
};
 
#endif /* Domaine_PolyMAC_MPFA_included */