PISM's SSA solver: the finite element method implementation written by Jed and David. More...

#include <SSAFEM.hh>

Inheritance diagram for pism::stressbalance::SSAFEM:

Classes
struct	CallbackData
	Adaptor for gluing SNESDAFormFunction callbacks to an SSAFEM. More...

struct	Coefficients

Public Member Functions
	SSAFEM (std::shared_ptr< const Grid > g)

virtual	~SSAFEM ()=default

Public Member Functions inherited from pism::stressbalance::SSA
	SSA (std::shared_ptr< const Grid > g)

virtual	~SSA ()

virtual void	update (const Inputs &inputs, bool full_update)
	Update the SSA solution.

virtual std::string	stdout_report () const
	Produce a report string for the standard output.

Public Member Functions inherited from pism::stressbalance::ShallowStressBalance
	ShallowStressBalance (std::shared_ptr< const Grid > g)

virtual	~ShallowStressBalance ()

void	init ()

const array::Vector1 &	velocity () const
	Get the thickness-advective 2D velocity.

const array::Scalar &	basal_frictional_heating ()
	Get the basal frictional heating (for the adaptive energy time-stepping).

void	compute_basal_frictional_heating (const array::Vector &velocity, const array::Scalar &tauc, const array::CellType &mask, array::Scalar &result) const
	Compute the basal frictional heating.

std::shared_ptr< const rheology::FlowLaw >	flow_law () const

EnthalpyConverter::Ptr	enthalpy_converter () const

const IceBasalResistancePlasticLaw *	sliding_law () const

double	flow_enhancement_factor () const

Public Member Functions inherited from pism::Component
	Component (std::shared_ptr< const Grid > grid)

virtual	~Component ()=default

DiagnosticList	diagnostics () const

TSDiagnosticList	ts_diagnostics () const

std::shared_ptr< const Grid >	grid () const

const Time &	time () const

const Profiling &	profiling () const

void	define_model_state (const File &output) const
	Define model state variables in an output file.

void	write_model_state (const File &output) const
	Write model state variables to an output file.

MaxTimestep	max_timestep (double t) const
	Reports the maximum time-step the model can take at time t.

Protected Member Functions
virtual void	init_impl ()
	Initialize a generic regular-grid SSA solver.

void	cache_inputs (const Inputs &inputs)
	Initialize stored data from the coefficients in the SSA. Called by SSAFEM::solve.

void	quad_point_values (const fem::Element &E, const Coefficients x, int mask, double thickness, double tauc, double *hardness) const
	Compute quadrature point values of various coefficients given a quadrature `Q` and nodal values.

void	driving_stress (const fem::Element &E, const Coefficients x, Vector2d result) const

void	PointwiseNuHAndBeta (double thickness, double hardness, int mask, double tauc, const Vector2d &U, const Vector2d &U_x, const Vector2d &U_y, double nuH, double dnuH, double beta, double dbeta)
	Compute the "(regularized effective viscosity) x (ice thickness)" and effective viscous bed strength from the current solution, at a single quadrature point.

void	compute_local_function (Vector2d const const velocity, Vector2d **residual)
	Implements the callback for computing the residual.

void	compute_local_jacobian (Vector2d const const velocity, Mat J)
	Implements the callback for computing the Jacobian.

virtual void	solve (const Inputs &inputs)

std::shared_ptr< TerminationReason >	solve_with_reason (const Inputs &inputs)

std::shared_ptr< TerminationReason >	solve_nocache ()

Protected Member Functions inherited from pism::stressbalance::SSA
virtual void	define_model_state_impl (const File &output) const
	The default (empty implementation).

virtual void	write_model_state_impl (const File &output) const
	The default (empty implementation).

void	extrapolate_velocity (const array::CellType1 &cell_type, array::Vector1 &velocity) const

Protected Member Functions inherited from pism::stressbalance::ShallowStressBalance
virtual DiagnosticList	diagnostics_impl () const

Protected Member Functions inherited from pism::Component
virtual MaxTimestep	max_timestep_impl (double t) const

virtual TSDiagnosticList	ts_diagnostics_impl () const

void	regrid (const std::string &module_name, array::Array &variable, RegriddingFlag flag=NO_REGRID_WITHOUT_REGRID_VARS)

Static Protected Member Functions
static void	explicit_driving_stress (const fem::Element &E, const Coefficients x, Vector2d result)

Protected Attributes
array::Scalar1	m_bc_mask

array::Vector1	m_bc_values

GeometryCalculator	m_gc

double	m_alpha

double	m_rho_g

array::Array2D< Coefficients >	m_coefficients

CallbackData	m_callback_data

petsc::SNES	m_snes

array::Scalar1	m_node_type
	Storage for node types (interior, boundary, exterior).

array::Vector1	m_boundary_integral
	Boundary integral (CFBC contribution to the residual).

double	m_dirichletScale

double	m_beta_ice_free_bedrock

double	m_epsilon_ssa

fem::ElementIterator	m_element_index

fem::Q1Element2	m_q1_element

const array::Scalar *	m_driving_stress_x

const array::Scalar *	m_driving_stress_y

Protected Attributes inherited from pism::stressbalance::SSA
std::string	m_stdout_ssa

array::Vector	m_velocity_global

Protected Attributes inherited from pism::stressbalance::ShallowStressBalance
IceBasalResistancePlasticLaw *	m_basal_sliding_law

std::shared_ptr< rheology::FlowLaw >	m_flow_law

EnthalpyConverter::Ptr	m_EC

array::Vector2	m_velocity

array::Scalar	m_basal_frictional_heating

double	m_e_factor
	flow enhancement factor

Protected Attributes inherited from pism::Component
const std::shared_ptr< const Grid >	m_grid
	grid used by this component

const Config::ConstPtr	m_config
	configuration database used by this component

const units::System::Ptr	m_sys
	unit system used by this component

const Logger::ConstPtr	m_log
	logger (for easy access)

Private Member Functions
void	cache_residual_cfbc (const Inputs &inputs)
	Compute and cache residual contributions from the integral over the lateral boundary.

void	monitor_jacobian (Mat Jac)

void	monitor_function (Vector2d const const velocity_global, Vector2d const const residual_global)

Static Private Member Functions
static PetscErrorCode	function_callback (DMDALocalInfo info, Vector2d const const velocity, Vector2d residual, CallbackData fe)
	SNES callbacks.

static PetscErrorCode	jacobian_callback (DMDALocalInfo info, Vector2d const const velocity, Mat A, Mat J, CallbackData fe)

Additional Inherited Members
Public Attributes inherited from pism::stressbalance::SSA
SSAStrengthExtension *	strength_extension

Protected Types inherited from pism::Component
enum	RegriddingFlag { REGRID_WITHOUT_REGRID_VARS , NO_REGRID_WITHOUT_REGRID_VARS }
	This flag determines whether a variable is read from the `-regrid_file` file even if it is not listed among variables in `-regrid_vars`. More...

Detailed Description

PISM's SSA solver: the finite element method implementation written by Jed and David.

Jed's original code is in rev 831: src/base/ssaJed/... The SSAFEM duplicates most of the functionality of SSAFD, using the finite element method.

Definition at line 38 of file SSAFEM.hh.

The documentation for this class was generated from the following files:

src/stressbalance/ssa/SSAFEM.hh
src/stressbalance/ssa/SSAFEM.cc

Classes

Public Member Functions

Protected Member Functions

Static Protected Member Functions

Protected Attributes

Private Member Functions

Static Private Member Functions

Additional Inherited Members

Detailed Description