Navier.h

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#ifndef Navier_included
#define Navier_included
 
#include <Cond_lim_base.h>
 
/*! @brief classe Navier Condition aux limites sur la vitesse de type "Navier" :
 *
 *       - composante normale de la vitesse nulle
 *       - composante tangentielle de la vitesse libre
 *       - contrainte imposee
 *     Exemples : Symetrie (contrainte nulle), Paroi_frottante (contrainte non nulle)
 *
 * @sa Cond_lim_base
 */
class Navier: public Cond_lim_base
{
  Declare_base(Navier);
public:
  int compatible_avec_eqn(const Equation_base&) const override { return 1; }
 
  virtual double coefficient_frottement(int ) const { return 0.; }
  virtual double coefficient_frottement(int , int ) const { return 0.; }
  virtual double coefficient_frottement_grad(int ) const { return 0.; } // Change the coefficient when calculation of gradient : nu = nullptr
  virtual double coefficient_frottement_grad(int , int ) const { return 0.; }
};
 
#endif