Operateur_IJK_base.cpp

/****************************************************************************
* Copyright (c) 2015 - 2016, CEA
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* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
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#include <Operateur_IJK_base.h>
#include <IJK_Field_vector.h>
#include <Cut_cell_FT_Disc.h>
// Definition of the fluxes
//
//  control volumes for velocity in x direction:
//  this face_i(i,j,k) is located at left of element(i,j,k)
//
//     -------------------------
//     .           |           .
//     .           |           .
//     .           |           .
//     .           |           .
//     .           |----->     .
//     .           |           .
//     .           |           .
//     .           |           .
//     -------------------------
//  face(i,j,k) receives fluxes from all neighbour faces:
//   flux_i(i,j,k) at left
//   flux_j(i,j,k)
//   flux_k(i,j,k)
//   flux_i(i+1,j,k) at right
//   ...
 
static inline void swap_data(IJK_Field_local_double*& a, IJK_Field_local_double*& b)
{
  IJK_Field_local_double *tmp=a;
  a=b;
  b=tmp;
}
 
/*
 * Operateur_IJK_faces_base
 */
 
Implemente_base(Operateur_IJK_faces_base_double,"Operateur_IJK_faces_base_double", Objet_U);
 
Sortie& Operateur_IJK_faces_base_double::printOn(Sortie& os) const
{
  //  Objet_U::printOn(os);
  return os;
}
 
Entree& Operateur_IJK_faces_base_double::readOn(Entree& is)
{
  //  Objet_U::readOn(is);
  return is;
}
 
// Compute the maximum stable timestep for a convection scheme on the local processor.
// The global stability timestep is the minimum of all values on all processors.
// The ghost velocities must be uptodate on the right each subdomain.
double Operateur_IJK_faces_base_double::compute_dtstab_convection_local(IJK_Field_double& vx, IJK_Field_double& vy, IJK_Field_double& vz)
{
  double inverse_dt_conv = 0.;
  const Domaine_IJK& geom = vx.get_domaine();
  const int ni = geom.get_nb_elem_local(DIRECTION_I);
  const int nj = geom.get_nb_elem_local(DIRECTION_J);
  const int nk = geom.get_nb_elem_local(DIRECTION_K);
  const double dx = geom.get_constant_delta(DIRECTION_I);
  const double dy = geom.get_constant_delta(DIRECTION_J);
  const ArrOfDouble& delta_z = geom.get_delta(DIRECTION_K);
  const int k_offset = geom.get_offset_local(DIRECTION_K);
 
  for (int k = 0 ; k < nk ; k++)
    {
      // pointeur pour optimisation du calcul des voisins ( marche pour les derivees)
      ConstIJK_double_ptr ptr_vx(vx, 0, 0, k);
      ConstIJK_double_ptr ptr_vy(vy, 0, 0, k);
      ConstIJK_double_ptr ptr_vz(vz, 0, 0, k);
      const double dz = delta_z[k + k_offset];
      const double inverse_dx = 1. / dx;
      const double inverse_dy = 1. / dy;
      const double inverse_dz = 1. / dz;
 
      for (int j = 0 ; j < nj ; j++)
        {
          for (int i = 0 ; i < ni ; i++)
            {
              // pas de temps de convection
              double vx0 , vx1 , vy0 , vy1 , vz0 , vz1 ; // vitesses face gauche en 0 et face droite en 1
              ptr_vx.get_center_right(DIRECTION::X, i, vx0, vx1);
              ptr_vy.get_center_right(DIRECTION::Y, i, vy0, vy1);
              ptr_vz.get_center_right(DIRECTION::Z, i, vz0, vz1);
              double inverse_dt_conv_loc =
                (std::max(vx0, 0.) - std::min(vx1, 0.)) * inverse_dx
                + (std::max(vy0, 0.) - std::min(vy1, 0.)) * inverse_dy
                + (std::max(vz0, 0.) - std::min(vz1, 0.)) * inverse_dz;
 
              inverse_dt_conv = std::max(inverse_dt_conv, inverse_dt_conv_loc);
            }
          if ( j < nj-1 )
            {
              ptr_vx.next_j();
              ptr_vy.next_j();
              ptr_vz.next_j();
            }
        }
    }
  inverse_dt_conv = std::max(1e-20, inverse_dt_conv);
  return 1. / inverse_dt_conv;
}
 
void Operateur_IJK_faces_base_double::compute_set(IJK_Field_double& dvx, IJK_Field_double& dvy, IJK_Field_double& dvz)
{
  compute_(dvx, dvy, dvz, 0 /* setting */);
}
 
void Operateur_IJK_faces_base_double::compute_add(IJK_Field_double& dvx, IJK_Field_double& dvy, IJK_Field_double& dvz)
{
  compute_(dvx, dvy, dvz, 1 /* adding */);
}
 
void Operateur_IJK_faces_base_double::compute_(IJK_Field_double& dvx, IJK_Field_double& dvy, IJK_Field_double& dvz, bool add)
{
  IJK_Field_local_double storage;
  storage.allocate(dvx.ni()+1, dvy.nj()+1, 6, 0);
  IJK_Field_local_double tmp[6];
  for (int i = 0; i < 6; i++)
    tmp[i].ref_ij(storage, i);
  IJK_Field_local_double *flux_vx_zmin = &tmp[0]; // flux pour la composante x a travers la face zmin des volumes de controles
  IJK_Field_local_double *flux_vy_zmin = &tmp[1]; // flux pour la composante y
  IJK_Field_local_double *flux_vz_zmin = &tmp[2]; // flux pour la composante z
  IJK_Field_local_double *flux_zmax = &tmp[3];    // flux a travers la face zmax des volumes de controles
  IJK_Field_local_double * const flux_x = &tmp[4]; // pointer will not change, content will change
  IJK_Field_local_double * const flux_y = &tmp[5];
 
  compute_flux_z_vx(*flux_vx_zmin, 0);
  compute_flux_z_vy(*flux_vy_zmin, 0);
  compute_flux_z_vz(*flux_vz_zmin, 0);
 
  correct_flux(flux_vx_zmin, 0, 2, 0);
  correct_flux(flux_vy_zmin, 0, 2, 1);
  correct_flux(flux_vz_zmin, 0, 2, 2);
 
  // At the bottom end of the domain, there is more layer of unknowns for vz:
  const int kmax = std::max(std::max(dvx.nk(), dvy.nk()), dvz.nk());
  for (int k = 0; k < kmax ; k++)
    {
      if (k < dvz.nk())
        {
 
          compute_flux_x_vz(*flux_x, k);
          compute_flux_y_vz(*flux_y, k);
          compute_flux_z_vz(*flux_zmax, k+1);
 
          correct_flux(flux_x, k, 0, 2);
          correct_flux(flux_y, k, 1, 2);
          correct_flux(flux_zmax, k+1, 2, 2);
 
          Operator_IJK_div(*flux_x, *flux_y, *flux_vz_zmin, *flux_zmax, dvz, k, add);
 
          exec_after_divergence_flux_z(dvz, k);
          swap_data(flux_vz_zmin, flux_zmax); // conserve le flux en z pour la couche z suivante
        }
      if (k < dvx.nk())
        {
          compute_flux_x_vx(*flux_x, k);
          compute_flux_y_vx(*flux_y, k);
          compute_flux_z_vx(*flux_zmax, k+1);
 
          correct_flux(flux_x, k, 0, 0);
          correct_flux(flux_y, k, 1, 0);
          correct_flux(flux_zmax, k+1, 2, 0);
 
          Operator_IJK_div(*flux_x, *flux_y, *flux_vx_zmin, *flux_zmax, dvx, k, add);
 
          exec_after_divergence_flux_x(dvx, k);
          swap_data(flux_vx_zmin, flux_zmax); // conserve le flux en z pour la couche z suivante
        }
      if (k < dvy.nk())
        {
          compute_flux_x_vy(*flux_x, k);
          compute_flux_y_vy(*flux_y, k);
          compute_flux_z_vy(*flux_zmax, k+1);
 
          correct_flux(flux_x, k, 0, 1);
          correct_flux(flux_y, k, 1, 1);
          correct_flux(flux_zmax, k+1, 2, 1);
 
          Operator_IJK_div(*flux_x, *flux_y, *flux_vy_zmin, *flux_zmax, dvy, k, add);
 
          exec_after_divergence_flux_y(dvy, k);
          swap_data(flux_vy_zmin, flux_zmax); // conserve le flux en z pour la couche z suivante
        }
    }
}
 
// Compute the "- divergence" of the given flux, integrated over control volume
// We assume than flux contain the integral of the flux on the faces of the control volumes
// For "div_set" method:
//  resu(i,j,k) = flux_x(i,j) - flux_x(i+1,j) + flux_y(i,j) - flux_y(i,j+1) + flux_zmin(i,j) - flux_zmax(i,j)
// For "div_add" method: same but
//  resu(i,j,k) += ...
void Operateur_IJK_faces_base_double::Operator_IJK_div(const IJK_Field_local_double& flux_x, const IJK_Field_local_double& flux_y,
                                                       const IJK_Field_local_double& flux_zmin, const IJK_Field_local_double& flux_zmax,
                                                       IJK_Field_double& resu, int k_layer, bool add)
{
  ConstIJK_double_ptr fx(flux_x, 0, 0, 0);
  ConstIJK_double_ptr fy(flux_y, 0, 0, 0);
  ConstIJK_double_ptr fzmin(flux_zmin, 0, 0, 0);
  ConstIJK_double_ptr fzmax(flux_zmax, 0, 0, 0);
  IJK_double_ptr resu_ptr(resu, 0, 0, k_layer);
 
 
  const int imax = resu.ni();
  const int jmax = resu.nj();
  const int vsize = Simd_double::size();
  for (int j = 0; ; j++)
    {
      for (int i = 0; i < imax; i += vsize)
        {
          Simd_double r, a, b;
          fx.get_center_right(DIRECTION::X, i, a, b);
          r = a-b;
 
          fy.get_center_right(DIRECTION::Y,i, a, b);
          r += a-b;
 
          fzmin.get_center(i, a);
          fzmax.get_center(i, b);
          r += a-b;
 
          if (add)
            {
              resu_ptr.get_center(i, a);
              r += a;
            }
          resu_ptr.put_val(i, r);
        }
      // do not execute end_iloop at last iteration (because of assert on valid j+1)
      if (j+1==jmax)
        break;
      fx.next_j();
      fy.next_j();
      fzmin.next_j();
      fzmax.next_j();
      resu_ptr.next_j();
    }
 
}
 
void Operateur_IJK_faces_base_double::correct_flux(IJK_Field_local_double *const flux,  const int k_layer, const int dir, const int compo)
{
}
 
 
/*
 * Operateur_IJK_elem_base
 */
 
Implemente_base(Operateur_IJK_elem_base_double,"Operateur_IJK_elem_base_double",Objet_U);
 
Sortie& Operateur_IJK_elem_base_double::printOn(Sortie& os) const
{
  //  Objet_U::printOn(os);
  return os;
}
 
Entree& Operateur_IJK_elem_base_double::readOn(Entree& is)
{
  //  Objet_U::readOn(is);
  return is;
}
 
void Operateur_IJK_elem_base_double::set_runge_kutta(int rk_step, double dt_tot, IJK_Field_vector3_double& current_fluxes, IJK_Field_vector3_double& RK3_F_fluxes)
{
  if (rk_step == -1)
    {
      runge_kutta_flux_correction_ = false;
      rk_step_ = -1;
      dt_tot_ = 0;
      current_fluxes_ = nullptr;
      RK3_F_fluxes_ = nullptr;
    }
  else
    {
      runge_kutta_flux_correction_ = true;
      rk_step_ = rk_step;
      dt_tot_ = dt_tot;
      current_fluxes_ = &current_fluxes;
      RK3_F_fluxes_ = &RK3_F_fluxes;
    }
}
 
void Operateur_IJK_elem_base_double::compute_set(IJK_Field_double& dx)
{
  compute_(dx, 0);
}
 
void Operateur_IJK_elem_base_double::compute_add(IJK_Field_double& dx)
{
  compute_(dx, 1);
}
 
void Operateur_IJK_elem_base_double::compute_(IJK_Field_double& dx, bool add)
{
  IJK_Field_local_double storage;
  storage.allocate(dx.ni()+1, dx.nj()+1, 4, 0);
  IJK_Field_local_double tmp[4];
  for (int i = 0; i < 4; i++)
    tmp[i].ref_ij(storage, i);
  IJK_Field_local_double *flux_zmin = &tmp[0];
  IJK_Field_local_double *flux_zmax = &tmp[1];    // flux a travers la face zmax des volumes de controles
  IJK_Field_local_double *const flux_x = &tmp[2]; // pointer will not change, content will change
  IJK_Field_local_double *const flux_y = &tmp[3];
 
  compute_flux_z(*flux_zmin, 0);
  correct_flux(flux_zmin, 0, 2);
  /*
   * TODO: correct_flux_z_min();
   * fluxes_to_correct ?
   * Critere fabs(fluxes_to_correct)<DMAX_FLOAT ?
   * Zero valeur admissible
   */
  const int kmax = dx.nk();
  for (int k = 0; k < kmax; k++)
    {
      compute_flux_x(*flux_x, k);
      compute_flux_y(*flux_y, k);
      compute_flux_z(*flux_zmax, k+1);
      /*
       * Correct the fluxes before it is summed
       * with Operator_IJK_div
       */
      correct_flux(flux_x, k, 0);
      correct_flux(flux_y, k, 1);
      correct_flux(flux_zmax, k+1, 2);
      Operator_IJK_div(*flux_x, *flux_y, *flux_zmin, *flux_zmax, dx, k, add);
      swap_data(flux_zmin, flux_zmax); // conserve le flux en z pour la couche z suivante
    }
}
 
void Operateur_IJK_elem_base_double::Operator_IJK_div(const IJK_Field_local_double& flux_x, const IJK_Field_local_double& flux_y,
                                                      const IJK_Field_local_double& flux_zmin, const IJK_Field_local_double& flux_zmax,
                                                      IJK_Field_double& resu, int k_layer, bool add)
{
  ConstIJK_double_ptr fx(flux_x, 0, 0, 0);
  ConstIJK_double_ptr fy(flux_y, 0, 0, 0);
  ConstIJK_double_ptr fzmin(flux_zmin, 0, 0, 0);
  ConstIJK_double_ptr fzmax(flux_zmax, 0, 0, 0);
  IJK_double_ptr resu_ptr(resu, 0, 0, k_layer);
 
 
  const int imax = resu.ni();
  const int jmax = resu.nj();
  const int vsize = Simd_double::size();
  for (int j = 0; ; j++)
    {
      for (int i = 0; i < imax; i += vsize)
        {
          Simd_double r, a, b;
          fx.get_center_right(DIRECTION::X, i, a, b);
          // correct_flux_spherical(a, b, i, j, k_layer, 0);
          r = a-b;
 
          fy.get_center_right(DIRECTION::Y,i, a, b);
          // correct_flux_spherical(a, b, i, j, k_layer, 1);
          r += a-b;
 
          fzmin.get_center(i, a);
          fzmax.get_center(i, b);
          // correct_flux_spherical(a, b, i, j, k_layer, 2);
          r += a-b;
 
          if (add)
            {
              resu_ptr.get_center(i, a);
              r += a;
            }
          resu_ptr.put_val(i, r);
        }
      // do not execute end_iloop at last iteration (because of assert on valid j+1)
      if (j+1==jmax)
        break;
      fx.next_j();
      fy.next_j();
      fzmin.next_j();
      fzmax.next_j();
      resu_ptr.next_j();
    }
 
}
 
void Operateur_IJK_elem_base_double::correct_flux(IJK_Field_local_double *const flux,   const int k_layer, const int dir)
{
  if (runge_kutta_flux_correction_)
    {
      {
        int ni = (dir == 0) ? flux->ni() : flux->ni() - 1;
        int nj = (dir == 1) ? flux->nj() : flux->nj() - 1;
        for (int j = 0; j < nj; j++)
          {
            for (int i = 0; i < ni; i++)
              {
                (*current_fluxes_)[dir](i,j,k_layer) = (*flux)(i,j,0);
              }
          }
      }
 
      runge_kutta3_update_surfacic_fluxes((*current_fluxes_)[dir], (*RK3_F_fluxes_)[dir], rk_step_, k_layer, dt_tot_);
 
      {
        int ni = (dir == 0) ? flux->ni() : flux->ni() - 1;
        int nj = (dir == 1) ? flux->nj() : flux->nj() - 1;
        for (int j = 0; j < nj; j++)
          {
            for (int i = 0; i < ni; i++)
              {
                (*flux)(i,j,0) = (*current_fluxes_)[dir](i,j,k_layer);
              }
          }
      }
    }
}
 
void Operateur_IJK_elem_base_double::compute_grad(IJK_Field_vector3_double& dx)
{
  IJK_Field_local_double storage;
  storage.allocate(dx[0].ni()+1, dx[0].nj()+1, 4, 0);
  IJK_Field_local_double tmp[4];
  for (int i = 0; i < 4; i++)
    tmp[i].ref_ij(storage, i);
  IJK_Field_local_double *flux_zmin = &tmp[0];
  IJK_Field_local_double *flux_zmax = &tmp[1];    // flux a travers la face zmax des volumes de controles
  IJK_Field_local_double *const flux_x = &tmp[2]; // pointer will not change, content will change
  IJK_Field_local_double *const flux_y = &tmp[3];
 
  compute_flux_z(*flux_zmin, 0);
 
  const int kmax = dx[0].nk();
  for (int k = 0; k < kmax; k++)
    {
      compute_flux_x(*flux_x, k);
      compute_flux_y(*flux_y, k);
      compute_flux_z(*flux_zmax, k+1);
      fill_grad_field_x_(*flux_x, dx, k);
      fill_grad_field_y_(*flux_y, dx, k);
      fill_grad_field_z_(*flux_zmin, *flux_zmax, dx, k);
      swap_data(flux_zmin, flux_zmax); // conserve le flux en z pour la couche z suivante
    }
}
 
void Operateur_IJK_elem_base_double::compute_grad_x(IJK_Field_double& dx)
{
  IJK_Field_local_double storage;
  storage.allocate(dx.ni()+1, dx.nj()+1, 1, 0);
  IJK_Field_local_double tmp;
  tmp.ref_ij(storage, 0);
  IJK_Field_local_double *const flux_x = &tmp;
  const int kmax = dx.nk();
  for (int k = 0; k < kmax; k++)
    {
      compute_flux_x(*flux_x, k);
      fill_grad_field_x_y_(*flux_x, dx, k, 0);
    }
}
 
void Operateur_IJK_elem_base_double::compute_grad_y(IJK_Field_double& dx)
{
  IJK_Field_local_double storage;
  storage.allocate(dx.ni()+1, dx.nj()+1, 1, 0);
  IJK_Field_local_double tmp;
  tmp.ref_ij(storage, 0);
  IJK_Field_local_double *const flux_y = &tmp;
  const int kmax = dx.nk();
  for (int k = 0; k < kmax; k++)
    {
      compute_flux_y(*flux_y, k);
      fill_grad_field_x_y_(*flux_y, dx, k, 1);
    }
}
 
void Operateur_IJK_elem_base_double::compute_grad_z(IJK_Field_double& dx)
{
  IJK_Field_local_double storage;
  storage.allocate(dx.ni()+1, dx.nj()+1, 2, 0);
  IJK_Field_local_double tmp[2];
  for (int i = 0; i < 2; i++)
    tmp[i].ref_ij(storage, i);
  IJK_Field_local_double *flux_zmin = &tmp[0];
  IJK_Field_local_double *flux_zmax = &tmp[1];
  compute_flux_z(*flux_zmin, 0);
  const int kmax = dx.nk();
  for (int k = 0; k < kmax; k++)
    {
      compute_flux_z(*flux_zmax, k+1);
      fill_grad_field_z_(*flux_zmin, *flux_zmax, dx, k);
      swap_data(flux_zmin, flux_zmax); // conserve le flux en z pour la couche z suivante
    }
}
 
void Operateur_IJK_elem_base_double::fill_grad_field_x_(IJK_Field_local_double& flux, IJK_Field_vector3_double& resu, int k)
{
  fill_grad_field_x_y_(flux, resu[0], k, 0);
}
 
void Operateur_IJK_elem_base_double::fill_grad_field_y_(IJK_Field_local_double& flux, IJK_Field_vector3_double& resu, int k)
{
  fill_grad_field_x_y_(flux, resu[1], k, 1);
}
 
void Operateur_IJK_elem_base_double::fill_grad_field_z_(IJK_Field_local_double& flux_min, IJK_Field_local_double& flux_max, IJK_Field_vector3_double& resu, int k)
{
  fill_grad_field_z_(flux_min, flux_max, resu[2], k);
}