ASPECT
Public Member Functions | Private Member Functions | Private Attributes | List of all members
aspect::MaterialModel::DynamicFriction< dim > Class Template Reference
Inheritance diagram for aspect::MaterialModel::DynamicFriction< dim >:
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Public Member Functions

virtual void evaluate (const MaterialModel::MaterialModelInputs< dim > &in, MaterialModel::MaterialModelOutputs< dim > &out) const
 
Qualitative properties one can ask a material model
virtual bool is_compressible () const
 
Reference quantities
virtual double reference_viscosity () const
 
- Public Member Functions inherited from aspect::MaterialModel::Interface< dim >
virtual ~Interface ()
 
virtual void initialize ()
 
virtual void update ()
 
virtual void create_additional_named_outputs (MaterialModelOutputs &outputs) const
 
virtual void fill_additional_material_model_inputs (MaterialModel::MaterialModelInputs< dim > &input, const LinearAlgebra::BlockVector &solution, const FEValuesBase< dim > &fe_values, const Introspection< dim > &introspection) const
 
const NonlinearDependence::ModelDependenceget_model_dependence () const
 
- Public Member Functions inherited from aspect::SimulatorAccess< dim >
 SimulatorAccess ()
 
 SimulatorAccess (const Simulator< dim > &simulator_object)
 
virtual ~SimulatorAccess ()
 
virtual void initialize_simulator (const Simulator< dim > &simulator_object)
 
template<typename PostprocessorType >
PostprocessorType * find_postprocessor () const
 
const Introspection< dim > & introspection () const
 
const Simulator< dim > & get_simulator () const
 
const Parameters< dim > & get_parameters () const
 
SimulatorSignals< dim > & get_signals () const
 
MPI_Comm get_mpi_communicator () const
 
TimerOutputget_computing_timer () const
 
const ConditionalOStreamget_pcout () const
 
double get_time () const
 
double get_timestep () const
 
double get_old_timestep () const
 
unsigned int get_timestep_number () const
 
unsigned int get_nonlinear_iteration () const
 
const parallel::distributed::Triangulation< dim > & get_triangulation () const
 
double get_volume () const
 
const Mapping< dim > & get_mapping () const
 
std::string get_output_directory () const
 
bool include_adiabatic_heating () const
 
bool include_latent_heat () const
 
bool include_melt_transport () const
 
int get_stokes_velocity_degree () const
 
double get_adiabatic_surface_temperature () const
 
double get_surface_pressure () const
 
bool convert_output_to_years () const
 
unsigned int get_pre_refinement_step () const
 
unsigned int n_compositional_fields () const
 
void get_refinement_criteria (Vector< float > &estimated_error_per_cell) const
 
void get_artificial_viscosity (Vector< float > &viscosity_per_cell, const bool skip_interior_cells=false) const
 
void get_artificial_viscosity_composition (Vector< float > &viscosity_per_cell, const unsigned int compositional_variable) const
 
const LinearAlgebra::BlockVectorget_current_linearization_point () const
 
const LinearAlgebra::BlockVectorget_solution () const
 
const LinearAlgebra::BlockVectorget_old_solution () const
 
const LinearAlgebra::BlockVectorget_old_old_solution () const
 
const LinearAlgebra::BlockVectorget_reaction_vector () const
 
const LinearAlgebra::BlockVectorget_mesh_velocity () const
 
const DoFHandler< dim > & get_dof_handler () const
 
const FiniteElement< dim > & get_fe () const
 
const LinearAlgebra::BlockSparseMatrixget_system_matrix () const
 
const LinearAlgebra::BlockSparseMatrixget_system_preconditioner_matrix () const
 
const MaterialModel::Interface< dim > & get_material_model () const
 
void compute_material_model_input_values (const LinearAlgebra::BlockVector &input_solution, const FEValuesBase< dim, dim > &input_finite_element_values, const typename DoFHandler< dim >::active_cell_iterator &cell, const bool compute_strainrate, MaterialModel::MaterialModelInputs< dim > &material_model_inputs) const
 
const GravityModel::Interface< dim > & get_gravity_model () const
 
const InitialTopographyModel::Interface< dim > & get_initial_topography_model () const
 
const GeometryModel::Interface< dim > & get_geometry_model () const
 
const AdiabaticConditions::Interface< dim > & get_adiabatic_conditions () const
 
bool has_boundary_temperature () const
 
DEAL_II_DEPRECATED const BoundaryTemperature::Interface< dim > & get_boundary_temperature () const
 
const BoundaryTemperature::Manager< dim > & get_boundary_temperature_manager () const
 
const BoundaryHeatFlux::Interface< dim > & get_boundary_heat_flux () const
 
bool has_boundary_composition () const
 
DEAL_II_DEPRECATED const BoundaryComposition::Interface< dim > & get_boundary_composition () const
 
const BoundaryComposition::Manager< dim > & get_boundary_composition_manager () const
 
const std::map< types::boundary_id, std::shared_ptr< BoundaryTraction::Interface< dim > > > & get_boundary_traction () const
 
DEAL_II_DEPRECATED const InitialTemperature::Interface< dim > & get_initial_temperature () const
 
const InitialTemperature::Manager< dim > & get_initial_temperature_manager () const
 
DEAL_II_DEPRECATED const InitialComposition::Interface< dim > & get_initial_composition () const
 
const InitialComposition::Manager< dim > & get_initial_composition_manager () const
 
const std::set< types::boundary_id > & get_fixed_temperature_boundary_indicators () const
 
const std::set< types::boundary_id > & get_fixed_heat_flux_boundary_indicators () const
 
const std::set< types::boundary_id > & get_fixed_composition_boundary_indicators () const
 
const std::set< types::boundary_id > & get_free_surface_boundary_indicators () const
 
DEAL_II_DEPRECATED const std::map< types::boundary_id, std::shared_ptr< BoundaryVelocity::Interface< dim > > > get_prescribed_boundary_velocity () const
 
const BoundaryVelocity::Manager< dim > & get_boundary_velocity_manager () const
 
const HeatingModel::Manager< dim > & get_heating_model_manager () const
 
const MeshRefinement::Manager< dim > & get_mesh_refinement_manager () const
 
const MeltHandler< dim > & get_melt_handler () const
 
const NewtonHandler< dim > & get_newton_handler () const
 
const WorldBuilder::World & get_world_builder () const
 
const FreeSurfaceHandler< dim > & get_free_surface_handler () const
 
const LateralAveraging< dim > & get_lateral_averaging () const
 
const ConstraintMatrix & get_current_constraints () const
 
bool simulator_is_initialized () const
 
double get_pressure_scaling () const
 
bool pressure_rhs_needs_compatibility_modification () const
 
bool model_has_prescribed_stokes_solution () const
 
TableHandlerget_statistics_object () const
 
template<typename PostprocessorType >
DEAL_II_DEPRECATED PostprocessorType * find_postprocessor () const
 
const Postprocess::Manager< dim > & get_postprocess_manager () const
 

Private Member Functions

const std::vector< double > compute_viscosities (const double pressure, const SymmetricTensor< 2, dim > &strain_rate) const
 

Private Attributes

double reference_T
 
MaterialUtilities::CompositionalAveragingOperation viscosity_averaging
 
std::vector< double > densities
 
std::vector< double > mu_d
 
double minimum_viscosity
 
double maximum_viscosity
 
std::vector< double > mu_s
 
std::vector< double > cohesions
 
std::vector< double > background_viscosities
 
double reference_strain_rate
 
double minimum_strain_rate
 
std::vector< double > thermal_expansivities
 
std::vector< double > thermal_conductivities
 
std::vector< double > specific_heats
 

Functions used in dealing with run-time parameters

virtual void parse_parameters (ParameterHandler &prm)
 
static void declare_parameters (ParameterHandler &prm)
 

Additional Inherited Members

- Public Types inherited from aspect::MaterialModel::Interface< dim >
typedef MaterialModel::MaterialModelInputs< dim > MaterialModelInputs
 
typedef MaterialModel::MaterialModelOutputs< dim > MaterialModelOutputs
 
- Static Public Member Functions inherited from aspect::MaterialModel::Interface< dim >
static void declare_parameters (ParameterHandler &prm)
 
- Static Public Member Functions inherited from aspect::SimulatorAccess< dim >
static void get_composition_values_at_q_point (const std::vector< std::vector< double > > &composition_values, const unsigned int q, std::vector< double > &composition_values_at_q_point)
 
- Protected Attributes inherited from aspect::MaterialModel::Interface< dim >
NonlinearDependence::ModelDependence model_dependence
 

Detailed Description

template<int dim>
class aspect::MaterialModel::DynamicFriction< dim >

This model is for use with an arbitrary number of compositional fields, where each field represents a rock type which can have completely different properties from the others. Each rock type itself has constant material properties, with the exception of viscosity which is modified according to a Drucker-Prager yield criterion. Unlike the drucker prager or visco plastic material models, the angle of internal friction is a function of velocity. This relationship is similar to rate-and-state friction constitutive relationships, which are applicable to the strength of rocks during earthquakes. The formulation used here is derived from van Dinther et al. 2013, JGR.

For each material parameter the user supplies a comma delimited list of length N+1, static friction of coefficient, dynamic friction of coefficient, cohesions and background viscosity (to calculate viscous stresses )where N is the number of compositional fields. The additional field corresponds to the value for background mantle. They should be ordered ``background, composition1, composition2...''

If a single value is given, then all the compositional fields are given that value. Other lengths of lists are not allowed. For a given compositional field the material parameters are treated as constant, except density, which varies linearly with temperature according to the thermal expansivity.

When more than one field is present at a point, they are averaged arithmetically. An exception is viscosity, which may be averaged arithmetically, harmonically, geometrically, or by selecting the viscosity of the composition with the greatest volume fraction.

Definition at line 65 of file dynamic_friction.h.

Member Function Documentation

§ evaluate()

template<int dim>
virtual void aspect::MaterialModel::DynamicFriction< dim >::evaluate ( const MaterialModel::MaterialModelInputs< dim > &  in,
MaterialModel::MaterialModelOutputs< dim > &  out 
) const
virtual

Function to compute the material properties in out given the inputs in in. If MaterialModelInputs.strain_rate has the length 0, then the viscosity does not need to be computed.

Implements aspect::MaterialModel::Interface< dim >.

§ is_compressible()

template<int dim>
virtual bool aspect::MaterialModel::DynamicFriction< dim >::is_compressible ( ) const
virtual

This model is not compressible, so this returns false.

Implements aspect::MaterialModel::Interface< dim >.

§ reference_viscosity()

template<int dim>
virtual double aspect::MaterialModel::DynamicFriction< dim >::reference_viscosity ( ) const
virtual

Return a reference value typical of the viscosities that appear in this model. This value is not actually used in the material description itself, but is used in scaling variables to the same numerical order of magnitude when solving linear systems. Specifically, the reference viscosity appears in the factor scaling the pressure against the velocity. It is also used in computing dimension-less quantities. You may want to take a look at the Kronbichler, Heister, Bangerth 2012 paper that describes the design of ASPECT for a description of this pressure scaling.

Note
The reference viscosity should take into account the complete constitutive relationship, defined as the scalar viscosity times the constitutive tensor. In most cases, the constitutive tensor will simply be the identity tensor (this is the default case), but this may become important for material models with anisotropic viscosities, if the constitutive tensor is not normalized.

Implements aspect::MaterialModel::Interface< dim >.

§ declare_parameters()

template<int dim>
static void aspect::MaterialModel::DynamicFriction< dim >::declare_parameters ( ParameterHandler prm)
static

Declare the parameters this class takes through input files.

§ parse_parameters()

template<int dim>
virtual void aspect::MaterialModel::DynamicFriction< dim >::parse_parameters ( ParameterHandler prm)
virtual

Read the parameters this class declares from the parameter file.

Reimplemented from aspect::MaterialModel::Interface< dim >.

§ compute_viscosities()

template<int dim>
const std::vector<double> aspect::MaterialModel::DynamicFriction< dim >::compute_viscosities ( const double  pressure,
const SymmetricTensor< 2, dim > &  strain_rate 
) const
private

From a list of static friction of coefficient, dynamic friction of coefficient, cohesions and background viscosity for N + 1 fields (background mantle and N compositions) , we compute viscosities for drucker prager model with coefficient of friction dependent on the strain rate.

Member Data Documentation

§ reference_T

template<int dim>
double aspect::MaterialModel::DynamicFriction< dim >::reference_T
private

Reference temperature for thermal expansion. All components use the same reference_T.

Definition at line 136 of file dynamic_friction.h.

§ viscosity_averaging

Definition at line 138 of file dynamic_friction.h.

§ densities

template<int dim>
std::vector<double> aspect::MaterialModel::DynamicFriction< dim >::densities
private

Vector for field densities, read from parameter file .

Definition at line 143 of file dynamic_friction.h.

§ mu_d

template<int dim>
std::vector<double> aspect::MaterialModel::DynamicFriction< dim >::mu_d
private

The dynamic coefficient of friction

Definition at line 148 of file dynamic_friction.h.

§ minimum_viscosity

template<int dim>
double aspect::MaterialModel::DynamicFriction< dim >::minimum_viscosity
private

The applied viscosity bounds

Definition at line 153 of file dynamic_friction.h.

§ maximum_viscosity

template<int dim>
double aspect::MaterialModel::DynamicFriction< dim >::maximum_viscosity
private

Definition at line 154 of file dynamic_friction.h.

§ mu_s

template<int dim>
std::vector<double> aspect::MaterialModel::DynamicFriction< dim >::mu_s
private

The static coefficient of friction

Definition at line 159 of file dynamic_friction.h.

§ cohesions

template<int dim>
std::vector<double> aspect::MaterialModel::DynamicFriction< dim >::cohesions
private

Vector for field viscosities, read from parameter file.

Definition at line 164 of file dynamic_friction.h.

§ background_viscosities

template<int dim>
std::vector<double> aspect::MaterialModel::DynamicFriction< dim >::background_viscosities
private

Vector for field viscosities, read from parameter file.

Definition at line 169 of file dynamic_friction.h.

§ reference_strain_rate

template<int dim>
double aspect::MaterialModel::DynamicFriction< dim >::reference_strain_rate
private

The reference strain rate used as a first estimate

Definition at line 174 of file dynamic_friction.h.

§ minimum_strain_rate

template<int dim>
double aspect::MaterialModel::DynamicFriction< dim >::minimum_strain_rate
private

Definition at line 175 of file dynamic_friction.h.

§ thermal_expansivities

template<int dim>
std::vector<double> aspect::MaterialModel::DynamicFriction< dim >::thermal_expansivities
private

Vector for field thermal expnsivities, read from parameter file.

Definition at line 180 of file dynamic_friction.h.

§ thermal_conductivities

template<int dim>
std::vector<double> aspect::MaterialModel::DynamicFriction< dim >::thermal_conductivities
private

Vector for field thermal conductivities, read from parameter file.

Definition at line 185 of file dynamic_friction.h.

§ specific_heats

template<int dim>
std::vector<double> aspect::MaterialModel::DynamicFriction< dim >::specific_heats
private

Vector for field specific heats, read from parameter file.

Definition at line 190 of file dynamic_friction.h.


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