Perte_Charge_Circulaire_VDF_Face.h

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#ifndef Perte_Charge_Circulaire_VDF_Face_included
#define Perte_Charge_Circulaire_VDF_Face_included
 
#include <Perte_Charge_VDF_base.h>
 
//!  Anisotropic pressure drop (along a unit vector v and in the plane orthogonal to it)
/**
   Corresponds to the sum of a pressure drop of intensity lambda in
   the direction of v, and a pressure drop of intensity
   lambda_ortho for any direction orthogonal to v.
 
   Or equivalently, the sum of an isotropic pressure drop of
   intensity lambda_ortho, and a directional pressure drop
   of vector v and intensity lambda - lambda_ortho. This is how
   the computation is coded.
 
   du/dt =
   - lambda_ortho(Re,x,y,z,t) * u * ||u|| / 2 Dh
   - (lambda(Re,x,y,z,t)-lambda_ortho(Re,x,y,z,t))
   * u.v * v * ||u|| / 2 Dh ||v||^2
 
   Reading arguments:
 
   Perte_Charge_Circulaire_VDF_Face diametre_hydraulique {
   lambda expression(Re,x,y,z,t)
   lambda_ortho expression(Re,x,y,z,t)
   diam_hydr champ_don
   direction champ_don
   [sous_domaine nom]
   }
 
*/
 
class Perte_Charge_Circulaire_VDF_Face: public Perte_Charge_VDF_base
{
  Declare_instanciable(Perte_Charge_Circulaire_VDF_Face);
public:
  void mettre_a_jour(double temps) override
  {
    diam_hydr->mettre_a_jour(temps);
    diam_hydr_ortho->mettre_a_jour(temps);
    v->mettre_a_jour(temps);
  }
 
protected:
  void set_param(Param& titi) const override;
  int lire_motcle_non_standard(const Motcle&, Entree&) override;
  //! Implements the effective pressure loss computation for a given location
  void coeffs_perte_charge(const DoubleVect& u, const DoubleVect& pos, double t, double norme_u, double dh, double nu, double reynolds, double& coeff_ortho, double& coeff_long, double& u_l,
                           DoubleVect& v_valeur) const override;
private:
  OWN_PTR(Champ_Don_base) diam_hydr_ortho;
  mutable Parser_U lambda_ortho;
  mutable DoubleVect v_valeur;
  OWN_PTR(Champ_Don_base) v; //!< Vecteur directeur de la perte de charge.
};
 
#endif /* Perte_Charge_Circulaire_VDF_Face_included */