BlatterTestvanderVeen.hh

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*/
 
#ifndef BLATTERTESTVANDERVEEN_H
#define BLATTERTESTVANDERVEEN_H
 
#include "pism/stressbalance/blatter/Blatter.hh"
 
namespace pism {
namespace stressbalance {
 
/*!
 * Implements the Dirichlet BC at the inflow boundary and the stress BC at the calving
 * front boundary for the X-Z van der Veen shelf setup.
 *
 * The basal drag coefficient beta is x-dependent but its values are passed in using the
 * basal yield stress input field.
 */
class BlatterTestvanderVeen : public Blatter {
public:
  BlatterTestvanderVeen(std::shared_ptr<const Grid> grid, int Mz, int coarsening_factor);
 
  // Exact ice velocity
  Vector2d u_exact(double x) const;
 
  // Exact ice thickness
  double H_exact(double x) const;
 
  // Exact bed elevation
  double b_exact(double x) const;
 
  // Exact sliding coefficient beta
  double beta_exact(double x) const;
private:
  bool dirichlet_node(const DMDALocalInfo &info, const fem::Element3::GlobalIndex& I);
 
  bool marine_boundary(int face,
                       const int *node_type,
                       const double *ice_bottom,
                       const double *sea_level);
 
  Vector2d u_bc(double x, double y, double z) const;
 
  void residual_lateral(const fem::Q1Element3 &element,
                        const fem::Q1Element3Face &face,
                        const double *surface_nodal,
                        const double *z_nodal,
                        const double *sl_nodal,
                        Vector2d *residual);
 
  void residual_surface(const fem::Q1Element3 &element,
                        const fem::Q1Element3Face &face,
                        Vector2d *residual);
 
  // constant ice hardness
  double m_B;
 
  // thickness at the inflow boundary
  double m_H0;
 
  // velocity at the inflow boundary
  double m_V0;
 
  // ratio of surface elevation to ice thickness
  double m_alpha;
 
  // ice density
  double m_rho_ice;
 
  // gravitational acceleration
  double m_g;
};
 
} // end of namespace stressbalance
} // end of namespace pism
 
#endif /* BLATTERTESTVANDERVEEN_H */