Neumann.h

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#ifndef Neumann_included
#define Neumann_included
 
#include <Cond_lim_base.h>
 
/*! @brief Classe Neumann This class is the base class of the hierarchy of Neumann-type boundary conditions.
 *
 *     A Neumann boundary condition imposes the value of the derivative of an unknown field at a boundary, which corresponds to:
 *
 *       - imposed flux for the scalar transport equation
 *       - imposed stress for the momentum equation
 *
 * @sa Cond_lim_base Neumann_homogene
 */
class Neumann: public Cond_lim_base
{
  Declare_base(Neumann);
public:
  virtual double flux_impose(int i) const;
  virtual double flux_impose(int i, int j) const;
  const DoubleTab& flux_impose(bool nb_faces_tot=false) const;
 
protected:
  mutable DoubleTab flux_impose_; // Stores all flux values on all faces of the boundary (no assumption of a uniform field). Useful for GPU.
};
 
#endif