PISM, A Parallel Ice Sheet Model  stable v2.1-1-g6902d5502 committed by Ed Bueler on 2023-12-20 08:38:27 -0800
IsothermalGlen.cc
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19 
20 #include <cmath>
21 
22 #include "pism/rheology/IsothermalGlen.hh"
23 #include "pism/util/ConfigInterface.hh"
24 
25 namespace pism {
26 namespace rheology {
27 
28 IsothermalGlen::IsothermalGlen(const std::string &prefix,
29  const Config &config, EnthalpyConverter::Ptr ec)
30  : PatersonBudd(prefix, config, ec) {
31  m_name = "isothermal Glen";
32 
33  m_softness_A = config.get_number("flow_law.isothermal_Glen.ice_softness");
35 }
36 
37 double IsothermalGlen::flow_impl(double stress, double, double, double) const {
38  return m_softness_A * pow(stress, m_n-1);
39 }
40 
41 double IsothermalGlen::softness_impl(double, double) const {
42  return m_softness_A;
43 }
44 
45 double IsothermalGlen::hardness_impl(double, double) const {
46  return m_hardness_B;
47 }
48 
49 double IsothermalGlen::flow_from_temp(double stress, double, double, double) const {
50  return m_softness_A * pow(stress,m_n-1);
51 }
52 
53 } // end of namespace rheology
54 } // end of namespace pism
double get_number(const std::string &name, UseFlag flag=REMEMBER_THIS_USE) const
A class for storing and accessing PISM configuration flags and parameters.
std::shared_ptr< EnthalpyConverter > Ptr
std::string m_name
Definition: FlowLaw.hh:117
double m_hardness_power
; used to compute hardness
Definition: FlowLaw.hh:136
double m_n
power law exponent
Definition: FlowLaw.hh:154
double flow_impl(double stress, double, double, double) const
double flow_from_temp(double stress, double, double, double) const
The flow law (temperature-dependent version).
double hardness_impl(double, double) const
double softness_impl(double, double) const
IsothermalGlen(const std::string &prefix, const Config &config, EnthalpyConverter::Ptr EC)
Derived class of FlowLaw for Paterson-Budd (1982)-Glen ice.
Definition: PatersonBudd.hh:32