OptTillphiYieldStress.hh

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// Copyright (C) 2011--2021 PISM Authors
//
// This file is part of PISM.
//
// PISM is free software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the Free Software
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// version.
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// FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
// details.
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
#ifndef _PISMOPTTILLPHIYIELDSTRESS_H_
#define _PISMOPTTILLPHIYIELDSTRESS_H_
 
#include "MohrCoulombYieldStress.hh"
 
#include "pism/util/iceModelVec.hh"
 
namespace pism {
 
class IceModelVec2CellType;
 
//! Iterative optimization of the till friction angle.
class OptTillphiYieldStress : public MohrCoulombYieldStress {
public:
  OptTillphiYieldStress(IceGrid::ConstPtr g);
  virtual ~OptTillphiYieldStress() = default;
 
private:
  DiagnosticList diagnostics_impl() const;
 
  void update_tillphi(const IceModelVec2S &ice_surface_elevation,
                      const IceModelVec2S &bed_topography,
                      const IceModelVec2CellType &mask);
 
  void init_t_last(const File &input_file);
  void init_usurf_target(const File &input_file);
 
  void init_impl(const YieldStressInputs &inputs);
  void bootstrap_impl(const File &input_file, const YieldStressInputs &inputs);
  void restart_impl(const File &input_file, int record);
  void update_impl(const YieldStressInputs &inputs, double t, double dt);
 
  MaxTimestep max_timestep_impl(double t) const;
 
  void define_model_state_impl(const File &output) const;
  void write_model_state_impl(const File &output) const;
 
  IceModelVec2S m_mask;
  IceModelVec2S m_usurf_difference;
  IceModelVec2S m_usurf_target;
 
  double m_dphi_scale;
 
  // convergence threshold:
  double m_dhdt_min;
 
  // lower and upper bounds of a tillphi adjustment:
  double m_dphi_min;
  double m_dphi_max;
 
  // constants defining the lower bound of tillphi:
  double m_phi0_min;
  double m_phi0_max;
  double m_topg_min;
  double m_topg_max;
 
  // the upper bound of tillphi:
  double m_phi_max;
 
  //! time of the last till friction angle update
  double m_t_last;
  //! Update interval in seconds
  double m_update_interval;
  //! Temporal resolution to use when checking whether it's time to update
  double m_t_eps;
  //! Name of the variable used to store the last update time.
  std::string m_time_name;
};
 
} // end of namespace pism
 
#endif /* _PISMOPTTILLPHIYIELDSTRESS_H_ */