ALE_BeamCoupling.cpp

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#include <ALE_BeamCoupling.h>
#include <Domaine_VEF.h>
#include <Navier_Stokes_std.h>
#include <Operateur_Diff.h>
#include <Operateur_Grad.h>
#include <Equation_base.h>
#include <Process.h>
#include <communications.h>
#include <Objet_U.h>
 
void ALE_BeamCoupling::read(Entree& is, int nb_bords_ALE, const Bords& les_bords_ALE)
{
  Motcle accolade_ouverte("{"), accolade_fermee("}"), motlu;
  Nom nomlu, beam_name = "none";
 
  is >> motlu;
  if (motlu != accolade_ouverte)
    {
      Cerr << "Error reading the beam model block: expected "
           << accolade_ouverte << ", got " << motlu << finl;
      Process::exit();
    }
 
  is >> nomlu;
  motlu = nomlu;
  if (motlu == "nb_beam")
    {
      is >> nbBeam_;
      if (nbBeam_ > 0) beam_ = std::vector<Beam_model>(nbBeam_);
      Cerr << "Beam number : " << nbBeam_ << finl;
    }
  else
    {
      Cerr << "Error reading the beam model block: expected 'nb_beam', got "
           << motlu << finl;
      Process::exit();
    }
 
  int count = 0;
  while (1)
    {
      is >> nomlu;
      motlu = nomlu;
      if (motlu == "Name")
        {
          is >> beam_name;
          // Verify the beam name matches a declared moving boundary
          bool found = false;
          for (int n = 0; n < nb_bords_ALE; n++)
            if (les_bords_ALE(n).le_nom() == beam_name)
              found = true;
 
          if (!found)
            {
              Cerr << "Beam name '" << beam_name
                   << "' must match a moving boundary declared in 'Imposer_vit_bords_ALE'." << finl;
              Process::exit();
            }
 
          beam_[count].setBeamName(beam_name);
          Cerr << "Beam name : " << beam_[count].getBeamName() << finl;
          beam_[count].read_beam(is);
          count++;
        }
      else if (motlu == accolade_fermee)
        {
          if (count != nbBeam_)
            {
              Cerr << "Read " << count << " beam model(s) but expected " << nbBeam_ << finl;
              Process::exit();
            }
          break;
        }
      else
        {
          Cerr << "Error reading the beam model: unexpected keyword " << motlu << finl;
          Process::exit();
        }
    }
}
 
DoubleTab& ALE_BeamCoupling::getVelocity(const int& i, const double& tps, const double& dt,
                                         Equation_base* eqn, bool is_resumption,
                                         int nb_bords_ALE, const Bords& les_bords_ALE)
{
  const double tempsLast = beam_[i].getTempsComputeForceOnBeam();
  if (tps != tempsLast && dt != 0.)
    {
      // eqn is guaranteed non-null when dt != 0 (Domaine_ALE::initialiser has run by then)
      assert(eqn != nullptr);
      computeFluidForce(i, *eqn, is_resumption, nb_bords_ALE, les_bords_ALE);
      beam_[i].setTempsComputeForceOnBeam(tps);
    }
  return beam_[i].getVelocity(tps, dt);
}
 
 
void ALE_BeamCoupling::computeFluidForce(const int& i, Equation_base& eqn,
                                         bool is_resumption,
                                         int nb_bords_ALE, const Bords& les_bords_ALE)
{
  const Navier_Stokes_std& eqn_hydr = ref_cast(Navier_Stokes_std, eqn);
  const Operateur_base& op_grad = eqn_hydr.operateur_gradient().l_op_base();
  const Operateur_base& op_diff = eqn_hydr.operateur_diff().l_op_base();
  const Domaine_VEF& le_dom_vef = ref_cast(Domaine_VEF, op_grad.equation().domaine_dis());
  const DoubleTab& xv           = le_dom_vef.xv();
  DoubleTab& flux_bords_grad    = op_grad.flux_bords();
  DoubleTab& flux_bords_diff    = op_diff.flux_bords();
 
  const int nbModes        = getNbModes(i);
  const int nb_planes      = getNbPlanes(i);
  const int modes_per_plane = nbModes / nb_planes;
 
  // On resumption the diffusive flux is zero until the end of the first time step.
  // Force an update via op_diff.ajouter() to get a meaningful value.
  if (is_resumption && mp_norme_vect(flux_bords_diff) == 0.)
    {
      DoubleTab resu = eqn_hydr.vitesse().valeurs();
      resu = 0.;
      op_diff.ajouter(eqn_hydr.vitesse().valeurs(), resu);
    }
 
  // Accumulate modal force contributions  [modes_per_plane, nb_planes]
  DoubleTab fluidForceOnBeam(modes_per_plane, nb_planes);
  fluidForceOnBeam = 0.;
 
  if (flux_bords_grad.size() == flux_bords_diff.size() && flux_bords_grad.size() > 0)
    {
      for (int n = 0; n < nb_bords_ALE; n++)
        {
          if (les_bords_ALE(n).le_nom() != beam_[i].getBeamName()) continue;
 
          const int ndeb = les_bords_ALE(n).num_premiere_face();
          const int nfin = ndeb + les_bords_ALE(n).nb_faces();
 
          for (int face = ndeb; face < nfin; face++)
            for (int plane = 0; plane < nb_planes; ++plane)
              for (int mode = 0; mode < modes_per_plane; ++mode)
                {
                  const DoubleTab& u = getDisplacement(i, mode);
                  const int comp     = getBendingDirection(i, plane);
                  const double phi   = interpolationPhiOnThe3DSurface(
                                         i, xv(face,0), xv(face,1), xv(face,2), plane, u);
                  fluidForceOnBeam(mode, plane) +=
                    (flux_bords_grad(face, comp) + flux_bords_diff(face, comp)) * phi;
                }
        }
    }
 
  Process::mp_sum_for_each_item(fluidForceOnBeam);
  beam_[i].setFluidForceOnBeam(fluidForceOnBeam);
 
  if (Process::je_suis_maitre())
    beam_[i].printOutputFluidForceOnBeam();
}
 
 
double ALE_BeamCoupling::computeDt(Domaine_dis_base& le_domaine_dis, const int& i) const
{
  const Domaine_VEF& domaine_VEF = ref_cast(Domaine_VEF, le_domaine_dis);
  const DoubleVect& surfaces = domaine_VEF.face_surfaces();
  const double minSurf = Process::mp_min(mp_min_vect(surfaces));
  // getSoundSpeed() is not const in Beam_model; const_cast is safe (read-only).
  return 0.5 * (minSurf / const_cast<Beam_model&>(beam_[i]).getSoundSpeed());
}
 
 
DoubleTab ALE_BeamCoupling::interpolationOnThe3DSurface(
  const int& i, const double& x, const double& y, const double& z,
  const DoubleTab& u, const DoubleTab& R) const
{
  return beam_[i].interpolationOnThe3DSurface(x, y, z, u, R);
}
 
double ALE_BeamCoupling::interpolationPhiOnThe3DSurface(
  const int& i, const double& x, const double& y, const double& z,
  const int& comp, const DoubleTab& u) const
{
  return beam_[i].interpolationPhiOnThe3DSurface(x, y, z, comp, u);
}