Hooke.cc

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 * This file is part of PISM.
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#include <cmath>
 
#include "pism/rheology/Hooke.hh"
#include "pism/util/Config.hh"
 
namespace pism {
namespace rheology {
 
// Hooke
 
Hooke::Hooke(double exponent,
             const Config &config, std::shared_ptr<EnthalpyConverter> ec)
  : PatersonBudd(exponent, config, ec) {
  m_name = "Hooke";
 
  m_Q_Hooke  = config.get_number("flow_law.Hooke.Q");
  m_A_Hooke  = config.get_number("flow_law.Hooke.A");
  m_C_Hooke  = config.get_number("flow_law.Hooke.C");
  m_K_Hooke  = config.get_number("flow_law.Hooke.k");
  m_Tr_Hooke = config.get_number("flow_law.Hooke.Tr");
}
 
double Hooke::softness_from_temp(double T_pa) const {
  return m_A_Hooke * exp(-m_Q_Hooke/(m_ideal_gas_constant * T_pa)
                         + 3.0 * m_C_Hooke * pow(m_Tr_Hooke - T_pa, -m_K_Hooke));
}
 
} // end of namespace rheology
} // end of namespace pism