OpConvDiscQuickIJKScalar.h

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#ifndef OpConvDiscQuickIJKScalar_included
#define OpConvDiscQuickIJKScalar_included
 
#include <Operateur_IJK_elem_conv_base.h>
#include <IJK_ptr.h>
 
class OpConvDiscQuickIJKScalar_double : public Operateur_IJK_elem_conv_base_double
{
  Declare_instanciable_sans_constructeur(OpConvDiscQuickIJKScalar_double);
public:
  OpConvDiscQuickIJKScalar_double() : Operateur_IJK_elem_conv_base_double() {  };
  void calculer(const IJK_Field_double& field,
                const IJK_Field_double& vx, const IJK_Field_double& vy, const IJK_Field_double& vz,
                IJK_Field_double& result) override;
  void ajouter(const IJK_Field_double& field,
               const IJK_Field_double& vx, const IJK_Field_double& vy, const IJK_Field_double& vz,
               IJK_Field_double& result) override;
protected:
 
  inline void compute_flux_x(IJK_Field_local_double& resu, const int k_layer) override
  {
    compute_flux_<DIRECTION::X>(resu,k_layer);
  }
  inline void compute_flux_y(IJK_Field_local_double& resu, const int k_layer) override
  {
    compute_flux_<DIRECTION::Y>(resu,k_layer);
  }
  inline void compute_flux_z(IJK_Field_local_double& resu, const int k_layer) override
  {
    compute_flux_<DIRECTION::Z>(resu,k_layer);
  }
 
  const IJK_Field_local_double *input_indicatrice_=0;
 
private:
 
  template <DIRECTION _DIR_>
  void compute_flux_(IJK_Field_local_double& resu, const int k_layer);
 
};
 
 
template <DIRECTION _DIR_>
void OpConvDiscQuickIJKScalar_double::compute_flux_(IJK_Field_local_double& resu, const int k_layer)
{
  if(_DIR_==DIRECTION::Z)
    {
      // The previous layer of curv and fram values might have been computed already
      if (stored_curv_fram_layer_z_ != k_layer-1)
        {
          compute_curv_fram(_DIR_, k_layer-1);
          shift_curv_fram(tmp_curv_fram_);
        }
    }
  compute_curv_fram(_DIR_, k_layer);
 
  ConstIJK_double_ptr velocity_dir(get_input_velocity(_DIR_), 0, 0, k_layer);
  ConstIJK_double_ptr input_field(*input_field_, 0, 0, k_layer);
  ConstIJK_double_ptr input_indicatrice(*input_indicatrice_, 0, 0, k_layer);
  ConstIJK_double_ptr curv_values(tmp_curv_fram_, 0, 0, 1); /* if z direction, "left" will be in layer 0 */
  ConstIJK_double_ptr fram_values(tmp_curv_fram_, 0, 0, 3); /* if z direction, "left" is in layer 2 */
  IJK_double_ptr resu_ptr(resu, 0, 0, 0);
  const int nx = _DIR_==DIRECTION::X ? input_field_->ni() + 1 : input_field_->ni();
  const int ny = _DIR_==DIRECTION::Y ? input_field_->nj() + 1 : input_field_->nj();
 
  double dx = 0.0;
  double surface = 0.0;
  if(_DIR_==DIRECTION::X)
    {
      dx = channel_data_.get_delta_x();
      surface = channel_data_.get_delta_y() * channel_data_.get_delta_z()[k_layer];
    }
  if(_DIR_==DIRECTION::Y)
    {
      dx = channel_data_.get_delta_y();
      surface = channel_data_.get_delta_x() * channel_data_.get_delta_z()[k_layer];
 
    }
  if(_DIR_==DIRECTION::Z)
    {
      dx = (channel_data_.get_delta_z()[k_layer-1] + channel_data_.get_delta_z()[k_layer]) * 0.5;
      surface = channel_data_.get_delta_x() * channel_data_.get_delta_y();
    }
 
  const double dx_squared_over_8 = dx * dx * 0.125;
 
  if(_DIR_==DIRECTION::Z)
    {
      // Are we on the wall ?
      const int global_k_layer = k_layer + channel_data_.offset_to_global_k_layer();
      // global index of the layer of flux of the wall
      //  (assume one walls at zmin and zmax)
      const int first_global_k_layer = 0;
      const int last_global_k_layer = channel_data_.nb_elem_k_tot();
 
      // GB 21/12/2020 : Similarly to velocity, we make the same adjustments.
      // if (global_k_layer == first_global_k_layer || global_k_layer == last_global_k_layer) {
      // ie (i) replace the former "==" by "<=" and ">=" to be identic to the condition in OpCentre4IJK
      // and (ii) add the condition on perio_k
      if (!perio_k_ && (global_k_layer <= first_global_k_layer || global_k_layer >= last_global_k_layer))
        {
          // We are on (or worse inside) the wall, zero flux
          putzero(resu);
          return;
        }
    }
 
  const int imax = nx;
  const int jmax = ny;
  const int vsize = Simd_double::size();
  for (int j = 0; ; j++)
    {
      for (int i = 0; i < imax; i += vsize)
        {
          Simd_double velocity;
          velocity_dir.get_center(i, velocity);
          double indm1, ind0, ind1, ind2;
          input_indicatrice.get_leftleft_left_center_right(_DIR_,i, indm1, ind0, ind1, ind2);
          const double diphm1 = indm1*(1-indm1)<DMINFLOAT?0:1;
          const double diph0 = ind0*(1-ind0)<DMINFLOAT?0:1;
          const double diph1 = ind1*(1-ind1)<DMINFLOAT?0:1;
          const double diph2 = ind2*(1-ind2)<DMINFLOAT?0:1;
          //TODO: completer les conditions
          if ((!diphm1) && (!diph0) && (!diph1) && (!diph2)) //normal
            {
              Simd_double T0, T1; // scalar value at left and at right of the computed flux
              Simd_double fram0, fram1;
              Simd_double curv0, curv1;
              input_field.get_left_center(_DIR_, i, T0, T1);
              fram_values.get_left_center(_DIR_, i, fram0, fram1);
              curv_values.get_left_center(_DIR_, i, curv0, curv1);
              Simd_double fram = SimdMax(fram0, fram1);
              Simd_double curv    = SimdSelect<double>(velocity, 0., curv1, curv0);
              Simd_double T_amont = SimdSelect<double>(velocity, 0., T1 /* if velocity < 0 */, T0 /* if velocity > 0 */);
              Simd_double flux = (T0 + T1) * 0.5 - dx_squared_over_8 * curv;
              flux = ((1. - fram) * flux + fram * T_amont) * velocity * surface;
              resu_ptr.put_val(i, flux);
            }
          else if (((diph0) && (diph1)) || ((!diph0) && (!diph1) && (diph2 || diphm1))) // cas centre
            {
              Simd_double T0, T1; // scalar value at left and at right of the computed flux
              input_field.get_left_center(_DIR_, i, T0, T1);
              Simd_double flux = (T0 + T1) * 0.5 ;
              flux = flux * velocity * surface;
              resu_ptr.put_val(i, flux);
            }
          else if ((diph1) && (!diph0) && (!diphm1))//schema decentre a gauche
            {
              Simd_double Tm1, T0, T1, T2; // scalar value at left and at right of the computed flux
              input_field.get_leftleft_left_center_right(_DIR_, i, Tm1, T0, T1, T2);
              Simd_double flux = T0 + (T0 - Tm1)*0.5 ;
              flux = flux * velocity * surface;
              resu_ptr.put_val(i, flux);
            }
          else if ((diph0) && (!diph1) && (!diph2))//schema decentre a droite
            {
              Simd_double T0, T1, T2; // scalar value at left and at right of the computed flux
              input_field.get_left_center_right(_DIR_, i, T0, T1, T2);
              Simd_double flux = T1 - (T2 - T1)*0.5 ;
              flux = flux * velocity * surface;
              resu_ptr.put_val(i, flux);
            }
          else if ((diph1) && (!diph0) && (diphm1))//cas particulier diphasique - mono - diph, on extrapole la valeur mono  gauche
            {
              Simd_double T0, T1; // scalar value at left and at right of the computed flux
              input_field.get_left_center(_DIR_, i, T0, T1);
              Simd_double flux = T0;
              flux = flux * velocity * surface;
              resu_ptr.put_val(i, flux);
            }
          else if ((diph0) && (!diph1) && (diph2))//cas particulier diphasique - mono - diph, on extrapole la valeur mono  droite
            {
              Simd_double T0, T1; // scalar value at left and at right of the computed flux
              input_field.get_left_center(_DIR_, i, T0, T1);
              Simd_double flux = T1;
              flux = flux * velocity * surface;
              resu_ptr.put_val(i, flux);
            }
        }
      // do not execute end_iloop at last iteration (because of assert on valid j+1)
      if (j+1==jmax)
        break;
      input_field.next_j();
      velocity_dir.next_j();
      fram_values.next_j();
      curv_values.next_j();
      resu_ptr.next_j();
    }
 
}
 
#endif /* OpConvDiscQuickIJKScalar_included */