Perte_Charge_PolyMAC_HFV.cpp

/****************************************************************************
* Copyright (c) 2026, CEA
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*****************************************************************************/
 
#include <Multiplicateur_diphasique_base.h>
#include <Perte_Charge_PolyMAC_HFV.h>
#include <Fluide_Incompressible.h>
#include <Domaine_Cl_PolyMAC_family.h>
#include <Domaine_PolyMAC_MPFA.h>
#include <Champ_Face_PolyMAC_CDO.h>
#include <Schema_Temps_base.h>
#include <Milieu_composite.h>
#include <Champ_Uniforme.h>
#include <QDM_Multiphase.h>
#include <Pb_Multiphase.h>
#include <Probleme_base.h>
#include <Equation_base.h>
#include <Sous_Domaine.h>
#include <Param.h>
 
Implemente_base(Perte_Charge_PolyMAC_HFV, "Perte_Charge_PolyMAC_HFV", Perte_Charge_PolyMAC_CDO);
 
Sortie& Perte_Charge_PolyMAC_HFV::printOn(Sortie& s) const { return s << que_suis_je() << finl; }
 
Entree& Perte_Charge_PolyMAC_HFV::readOn(Entree& is) { return Perte_Charge_PolyMAC_CDO::readOn(is); }
 
void Perte_Charge_PolyMAC_HFV::ajouter_blocs(matrices_t matrices, DoubleTab& secmem, const tabs_t& semi_impl) const
{
  assert(has_interface_blocs());
 
  const Domaine_Poly_base& domaine = ref_cast(Domaine_Poly_base, equation().domaine_dis());
  const Pb_Multiphase *pbm = sub_type(Pb_Multiphase, equation().probleme()) ? &ref_cast(Pb_Multiphase, equation().probleme()) : nullptr;
  const Champ_Face_PolyMAC_CDO& ch = ref_cast(Champ_Face_PolyMAC_CDO, equation().inconnue());
  const Champ_Don_base& dh = diam_hydr;
 
  const DoubleTab& xp = domaine.xp(), &xv = domaine.xv(), &vit = la_vitesse->valeurs(), &pvit = la_vitesse->passe(),
                   &nu = le_fluide->viscosite_cinematique().valeurs(), &vfd = domaine.volumes_entrelaces_dir(),
                    &mu = le_fluide->viscosite_dynamique().valeurs(), &rho = le_fluide->masse_volumique().passe(),
                     *alp = pbm ? &pbm->equation_masse().inconnue().passe() : nullptr;
 
  const DoubleVect& pe = le_fluide->porosite_elem(), &pf = le_fluide->porosite_face(), &fs = domaine.face_surfaces(), &ve = domaine.volumes();
  const Multiplicateur_diphasique_base *fmult = pbm && pbm->has_correlation("multiplicateur_diphasique") ?
                                                &ref_cast(Multiplicateur_diphasique_base, pbm->get_correlation("multiplicateur_diphasique")) : nullptr;
 
  const Sous_Domaine *pssz = sous_domaine ? &le_sous_domaine.valeur() : nullptr;
  const IntTab& e_f = domaine.elem_faces(), &f_e = domaine.face_voisins(), &fcl = ch.fcl();
  Matrice_Morse *mat = matrices.count(ch.le_nom().getString()) ? matrices.at(ch.le_nom().getString()) : nullptr;
 
  int i, j, k, f, d, D = dimension, cN = nu.dimension(0) == 1, cM = mu.dimension(0) == 1, cR = rho.dimension(0) == 1,
                     C_dh = sub_type(Champ_Uniforme, diam_hydr.valeur()), m, n, N = vit.line_size(),
                     poly_v2 = sub_type(Domaine_PolyMAC_MPFA, domaine), nf_tot = domaine.nb_faces_tot();
 
  double t = equation().schema_temps().temps_courant(), v_min = 0.1, Gm, Fm, nvm, arm, C_dir, C_iso, v_dir;
  DoubleTrav pos(D), v(N, D), vm(D), v_ph(D), dir(D), nv(N), Cf(N), Cf_t(N), Fk(N), G(N), mult(N, 2), Sigma_tab;
 
  for (n = 0; n < N; n++)
    mult(n, 0) = 1, mult(n, 1) = 0; //default value of mult
  if (fmult) //if multiplier -> compute sigma
    {
      const Milieu_composite& milc = ref_cast(Milieu_composite, equation().milieu());
      // For the span methods of the Saturation class
      const int ne_tot = domaine.nb_elem_tot(), nb_max_sat =  N * (N-1) /2; // arithmetic series !
      Sigma_tab.resize(ne_tot, nb_max_sat);
      for (k = 0; k < N; k++)
        for (int l = k + 1; l < N; l++)
          if (milc.has_saturation(k, l))
            {
              const Saturation_base& z_sat = milc.get_saturation(k, l);
              const int ind_trav = (k*(N-1)-(k-1)*(k)/2) + (l-k-1); // upper triangular matrix !
              // retrieve Tsat and sigma ...
              const DoubleTab& sig = z_sat.get_sigma_tab();
 
              // fill in the good case
              for (int ii = 0; ii < ne_tot; ii++)
                Sigma_tab(ii, ind_trav) = sig(ii);
            }
    }
 
  /* contribution of each element where the pressure drop is applied */
  for (i = 0; i < (pssz ? pssz->nb_elem_tot() : domaine.nb_elem_tot()); i++)
    {
      int e = pssz ? (*pssz)[i] : i;
      for (d = 0; d < D; d++)
        pos(d) = xp(e, d);
 
      /* velocity vector at element e */
      double dh_e = C_dh ? dh.valeurs()(0, 0) : dh.valeur_a_compo(pos, 0);
      if (poly_v2)
        for (d = 0; d < D; d++)
          for (n = 0; n < N; n++)
            v(n, d) = pvit(nf_tot + D * e + d, n); //velocity via auxiliary variable
      else
        for (v = 0, j = 0; j < e_f.dimension(1) && (f = e_f(e, j)) >= 0; j++)
          for (n = 0; n < N; n++)
            for (d = 0; d < D; d++) /* PolyMAC_HFV V1: velocity to reconstruct */
              v(n, d) += fs(f) * pf(f) / (ve(e) * pe(e)) * (xv(f, d) - xp(e, d)) * (e == f_e(f, 0) ? 1 : -1) * pvit(f, n);
 
      /* norm of v (with threshold), mass flux per phase and total */
      for (n = 0, Gm = 0; n < N; Gm += G(n), n++)
        nv(n) = std::max(v_min, sqrt(domaine.dot(&v(n, 0), &v(n, 0)))), G(n) = (alp ? (*alp)(e, n) : 1) * rho(!cR * e, n) * nv(n);
      for (arm = 0, n = 0; n < N; n++)
        for (arm += (alp ? (*alp)(e, n) : 1) * rho(!cR * e, n), d = 0; d < D; d++)
          vm(d) += (alp ? (*alp)(e, n) : 1) * rho(!cR * e, n) * v(n, d);
      for (d = 0; d < D; d++)
        vm(d) /= arm;
      nvm = std::max(v_min, sqrt(domaine.dot(&vm(0), &vm(0))));
 
      /* friction coefficients per component: Cf(n) (single phase), Cf_t(n) (total flow rate in this phase) */
      for (n = 0; n < N; n++)
        {
          double Re = dh_e * std::max(G(n), 1e-10) / mu(!cM * e, n), Re_m = dh_e * Gm / mu(!cM * e, n);
          for (d = 0; d < D; d++)
            v_ph(d) = v(n, d);
          /* single phase */
          coeffs_perte_charge(v_ph, pos, t, nv(n), dh_e, nu(!cN * e, n), Re, C_iso, C_dir, v_dir, dir);
          Cf(n) = (C_iso + (C_dir - C_iso) * (nv(n) > 1e-8 ? std::pow(domaine.dot(&v(n, 0), &dir(0)), 2) / (nv(n) * nv(n)) : 0)) * 2 * dh_e / std::max(nv(n), 1e-10);
          /* entire mixture in the phase */
          coeffs_perte_charge(vm, pos, t, nvm, dh_e, nu(!cN * e, n), Re_m, C_iso, C_dir, v_dir, dir);
          Cf_t(n) = (C_iso + (C_dir - C_iso) * (nvm > 1e-8 ? std::pow(domaine.dot(&vm(0), &dir(0)), 2) / (nvm * nvm) : 0)) * 2 * dh_e / std::max(nvm, 1e-10);
          Fk(n) = Cf(n) * G(n) * G(n) / rho(!cR * e, n) / 2.0 / dh_e; //force
        }
      Fm = Cf_t(0) * Gm * Gm / rho(!cR * e, 0) / 2.0 / dh_e; //wall force "mixture" (total flow rate, but physical properties of the liquid)
 
      /* call the two-phase multiplier (if it exists) */
      if (fmult) fmult->coefficient(&(*alp)(e, 0), &rho(!cR * e, 0), &nv(0), &Cf_t(0), &mu(!cM * e, 0), dh_e, Sigma_tab(e,0), &Fk(0), Fm, mult);
 
      /* contributions to the faces of element e */
      for (j = 0; j < e_f.dimension(1) && (f = e_f(e, j)) >= 0; j++)
        if (f < domaine.nb_faces() && (!poly_v2 || fcl(f, 0) < 2)) /* contribution to Dirichlet faces in Poly V1 */
          for (n = 0; n < N; n++)
            {
              double fac = pf(f) * vfd(f, e != f_e(f, 0)) * 0.5 / dh_e, fac_n = fac * mult(n, 0) * Cf(n) * nv(n), fac_m = fac * mult(n, 1) * Cf_t(n) * Gm / rho(!cR * e, n);
              for (m = 0; m < N; m++)
                secmem(f, n) -= ((m == n) * fac_n + fac_m) * (alp ? (*alp)(e, m) : 1) * (pbm ? rho(!cR * e, m) : 1) * vit(f, m);
              if (mat)
                for (m = 0; m < N; m++)
                  (*mat)(N * f + n, N * f + m) += ((m == n) * fac_n + fac_m) * (alp ? (*alp)(e, m) : 1) * (pbm ? rho(!cR * e, m) : 1);
            }
 
      if (poly_v2)
        for (d = 0, k = nf_tot + D * e; d < D; d++, k++)
          for (n = 0; n < N; n++) /* PolyMAC_HFV V2: contributions to element equations */
            {
              double fac = pe(e) * ve(e) * 0.5 / dh_e, fac_n = fac * mult(n, 0) * Cf(n) * nv(n), fac_m = fac * mult(n, 1) * Cf_t(n) * Gm / rho(!cR * e, n);
              for (m = 0; m < N; m++)
                secmem(k, n) -= ((m == n) * fac_n + fac_m) * (alp ? (*alp)(e, m) : 1) * (pbm ? rho(!cR * e, m) : 1) * vit(k, m);
              if (mat)
                for (m = 0; m < N; m++)
                  (*mat)(N * k + n, N * k + m) += ((m == n) * fac_n + fac_m) * (alp ? (*alp)(e, m) : 1) * (pbm ? rho(!cR * e, m) : 1);
            }
    }
}