Op_Diff_VEF_base.h

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#ifndef Op_Diff_VEF_base_included
#define Op_Diff_VEF_base_included
 
#include <Operateur_Diff_base.h>
 
#include <Domaine_VEF.h>
 
#include <Op_VEF_Face.h>
#include <Milieu_base.h>
#include <TRUST_Ref.h>
 
class Domaine_Cl_VEF;
class Champ_Inc_base;
class Sortie;
 
/*! @brief class Op_Diff_VEF_base
 *
 *  @brief Base class for VEF diffusion operators.
 *
 *
 */
 
class Op_Diff_VEF_base : public Operateur_Diff_base, public Op_VEF_Face
{
  Declare_base(Op_Diff_VEF_base);
public:
 
  int impr(Sortie& os) const override;
  void associer(const Domaine_dis_base& , const Domaine_Cl_dis_base& ,const Champ_Inc_base& ) override;
 
  template <typename _TYPE_>
  double viscA(int face_i, int face_j, int num_elem, const _TYPE_& diffu) const;
  template <typename _TYPE_>
  KOKKOS_INLINE_FUNCTION double viscA(int face_i, int face_j, int num_elem, const _TYPE_& diffu, CIntTabView face_voisins_v, CDoubleTabView face_normales_v, CDoubleArrView inverse_volumes_v) const;
 
  double calculer_dt_stab() const override;
  void calculer_pour_post(Champ_base& espace_stockage,const Nom& option,int comp) const override;
  Motcle get_localisation_pour_post(const Nom& option) const override;
  virtual void remplir_nu(DoubleTab&) const;
  int phi_psi_diffuse(const Equation_base& eq) const;
 
  const Domaine_VEF& domaine_vef() const { return le_dom_vef.valeur(); }
  const Domaine_Cl_VEF& domaine_cl_vef() const { return la_zcl_vef.valeur(); }
 
protected:
 
  OBS_PTR(Domaine_VEF) le_dom_vef;
  OBS_PTR(Domaine_Cl_VEF) la_zcl_vef;
  OBS_PTR(Champ_Inc_base) inconnue_;
  //DoubleVect porosite_face;
  mutable DoubleTab nu_;
 
private:
  template<typename _TYPE_> std::enable_if_t< std::is_same<_TYPE_, double>::value , double>
  inline diffu__(const int comp, const int num_elem, const _TYPE_ &diffu) const { return diffu; }
 
  template<typename _TYPE_> std::enable_if_t< std::is_same<_TYPE_, TRUSTTab<double>>::value , double>
  inline diffu__(const int comp, const int num_elem, const _TYPE_ &diffu) const { return diffu(num_elem, comp); }
 
  template<typename _TYPE_> std::enable_if_t< std::is_same<_TYPE_, TRUSTArray<double>>::value , double>
  inline diffu__(const int comp, const int num_elem, const _TYPE_ &diffu) const { return diffu(comp); }
 
  template<typename _TYPE_> std::enable_if_t< std::is_same<_TYPE_, double>::value , double>
  KOKKOS_INLINE_FUNCTION diffu__view(const int comp, const int num_elem, const _TYPE_ &diffu) const { return diffu; }
 
  template<typename _TYPE_> std::enable_if_t< std::is_same<_TYPE_, TRUSTTab<double>>::value , double>
  KOKKOS_INLINE_FUNCTION diffu__view(const int comp, const int num_elem, const _TYPE_ &diffu) const { return diffu(num_elem, comp); }
 
  template<typename _TYPE_> std::enable_if_t< std::is_same<_TYPE_, TRUSTArray<double>>::value , double>
  KOKKOS_INLINE_FUNCTION diffu__view(const int comp, const int num_elem, const _TYPE_ &diffu) const { return diffu(comp); }
};
 
// WARNING the diffu used in the functions is only LOCAL (d_nu is called afterwards)
// Useful function viscA
// nu <Si, Sj> / |K|
template<typename _TYPE_>
inline double Op_Diff_VEF_base::viscA(int i, int j, int num_elem, const _TYPE_ &diffu) const
{
  constexpr bool is_double = std::is_same<_TYPE_, double>::value;
  const Domaine_VEF& domaine = le_dom_vef.valeur();
  const IntTab& face_voisins = domaine.face_voisins();
  const DoubleTab& face_normales = domaine.face_normales();
  const DoubleVect& inverse_volumes = domaine.inverse_volumes();
 
  double DSiSj = 0.;
  if (is_double)
    {
      for (int k = 0; k < dimension; k++)
        DSiSj += diffu__(k * dimension + k, num_elem, diffu) * face_normales(i, k) * face_normales(j, k);
    }
  else
    {
      for (int k = 0; k < dimension; k++)
        for (int l = 0; l < dimension; l++)
          DSiSj += diffu__(k * dimension + l, num_elem, diffu) * face_normales(i, k) * face_normales(j, l);
    }
 
  if ((face_voisins(i, 0) == face_voisins(j, 0)) || (face_voisins(i, 1) == face_voisins(j, 1)))
    return -DSiSj * inverse_volumes(num_elem);
  else
    return DSiSj * inverse_volumes(num_elem);
}
 
template<typename _TYPE_>
KOKKOS_INLINE_FUNCTION double Op_Diff_VEF_base::viscA(int i, int j, int num_elem, const _TYPE_ &diffu, CIntTabView face_voisins_v, CDoubleTabView face_normales_v, CDoubleArrView inverse_volumes_v) const
{
  constexpr bool is_double = std::is_same<_TYPE_, double>::value;
  int dim = (int)face_normales_v.extent(1);
  double DSiSj = 0.;
  if (is_double)
    {
      for (int k = 0; k < dim; k++)
        DSiSj += diffu__view(k * dim + k, num_elem, diffu) * face_normales_v(i, k) * face_normales_v(j, k);
    }
  else
    {
      for (int k = 0; k < dim; k++)
        for (int l = 0; l < dim; l++)
          DSiSj += diffu__view(k * dim + l, num_elem, diffu) * face_normales_v(i, k) * face_normales_v(j, l);
    }
 
  if ((face_voisins_v(i, 0) == face_voisins_v(j, 0)) || (face_voisins_v(i, 1) == face_voisins_v(j, 1)))
    return -DSiSj * inverse_volumes_v(num_elem);
  else
    return DSiSj * inverse_volumes_v(num_elem);
}
#endif /* Op_Diff_VEF_base_included */