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OGS
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OGS
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<OpenGeoSysProject>
<mesh>cube_1x1x1_hex20_1e0.vtu</mesh>
<geometry>cube_1x1x1.gml</geometry>
<processes>
<process>
<name>RM</name>
<type>RICHARDS_MECHANICS</type>
<integration_order>3</integration_order>
<constitutive_relation>
<type>LinearElasticIsotropic</type>
<youngs_modulus>E</youngs_modulus>
<poissons_ratio>nu</poissons_ratio>
</constitutive_relation>
<process_variables>
<displacement>displacement</displacement>
<pressure>pressure</pressure>
</process_variables>
<secondary_variables>
<secondary_variable internal_name="sigma" output_name="sigma" />
<secondary_variable internal_name="epsilon" output_name="epsilon" />
<secondary_variable internal_name="velocity" output_name="velocity" />
<secondary_variable internal_name="saturation" output_name="saturation" />
<secondary_variable internal_name="porosity" output_name="porosity" />
</secondary_variables>
<specific_body_force>0 0 0</specific_body_force>
</process>
</processes>
<media>
<medium>
<phases>
<phase>
<type>AqueousLiquid</type>
<properties>
<property>
<name>viscosity</name>
<type>Constant</type>
<value>1</value>
</property>
<property>
<name>density</name>
<type>Linear</type>
<reference_value>1</reference_value>
<independent_variable>
<variable_name>liquid_phase_pressure</variable_name>
<reference_condition>0.1</reference_condition>
<slope>1</slope>
</independent_variable>
</property>
</properties>
</phase>
<phase>
<type>Solid</type>
<properties>
<property>
<name>density</name>
<type>Constant</type>
<value>1</value>
</property>
</properties>
</phase>
</phases>
<properties>
<property>
<name>biot_coefficient</name>
<type>Constant</type>
<value>1</value>
</property>
<property>
<name>porosity</name>
<type>PorosityFromMassBalance</type>
<initial_porosity>phi0</initial_porosity>
<minimal_porosity>0</minimal_porosity>
<maximal_porosity>1</maximal_porosity>
</property>
<property>
<name>permeability</name>
<type>Constant</type>
<value>1</value>
</property>
<property>
<name>reference_temperature</name>
<type>Constant</type>
<value>293.15</value>
</property>
<property>
<name>saturation</name>
<type>SaturationVanGenuchten</type>
<residual_liquid_saturation>0.1</residual_liquid_saturation>
<residual_gas_saturation>0.05</residual_gas_saturation>
<exponent>0.8</exponent>
<p_b>0.5</p_b>
</property>
<property>
<name>relative_permeability</name>
<type>Constant</type>
<value>1</value>
</property>
<property>
<name>bishops_effective_stress</name>
<type>BishopsPowerLaw</type>
<exponent>3</exponent>
</property>
</properties>
</medium>
</media>
<time_loop>
<processes>
<process ref="RM">
<nonlinear_solver>nonlinear_solver</nonlinear_solver>
<convergence_criterion>
<type>PerComponentDeltaX</type>
<norm_type>NORM2</norm_type>
<abstols>1e-13 1e-13 1e-13 1e-13</abstols>
</convergence_criterion>
<time_discretization>
<type>BackwardEuler</type>
</time_discretization>
<time_stepping>
<type>FixedTimeStepping</type>
<t_initial>0</t_initial>
<t_end>3</t_end>
<timesteps>
<pair>
<repeat>50</repeat>
<delta_t>.02</delta_t>
</pair>
<pair>
<repeat>4</repeat>
<delta_t>.25</delta_t>
</pair>
<pair>
<repeat>50</repeat>
<delta_t>.02</delta_t>
</pair>
</timesteps>
</time_stepping>
</process>
</processes>
<output>
<type>VTK</type>
<prefix>bishops_effective_stress_power_law</prefix>
<timesteps>
<pair>
<repeat>1000</repeat>
<each_steps>1</each_steps>
</pair>
</timesteps>
<variables>
<variable>displacement</variable>
<variable>pressure</variable>
<variable>sigma</variable>
<variable>epsilon</variable>
<variable>velocity</variable>
<variable>saturation</variable>
<variable>porosity</variable>
<variable>porosity_avg</variable>
</variables>
<suffix>ts{:timestep}_t_{:time}</suffix>
</output>
</time_loop>
<local_coordinate_system>
<basis_vector_0>e0</basis_vector_0>
<basis_vector_1>e1</basis_vector_1>
<basis_vector_2>e2</basis_vector_2>
</local_coordinate_system>
<parameters>
<parameter>
<name>e0</name>
<type>Constant</type>
<values>1 0 0</values>
</parameter>
<parameter>
<name>e1</name>
<type>Constant</type>
<values>0 1 0</values>
</parameter>
<parameter>
<name>e2</name>
<type>Constant</type>
<values>0 0 1</values>
</parameter>
<parameter>
<name>E</name>
<type>Constant</type>
<value>1</value>
</parameter>
<parameter>
<name>nu</name>
<type>Constant</type>
<value>.3</value>
</parameter>
<parameter>
<name>phi0</name>
<type>Constant</type>
<value>0.5</value>
</parameter>
<parameter>
<name>displacement0</name>
<type>Constant</type>
<values>0 0 0</values>
</parameter>
<parameter>
<name>p0</name>
<type>Constant</type>
<value>0.1</value>
</parameter>
<parameter>
<name>dirichlet0</name>
<type>Constant</type>
<values>0</values>
</parameter>
<parameter>
<name>pressure_bc</name>
<type>CurveScaled</type>
<curve>pressure_ramp</curve>
<parameter>p0</parameter>
</parameter>
</parameters>
<curves>
<curve>
<name>pressure_ramp</name>
<coords>0 1 2 3</coords>
<values>1 -10 -10 1</values>
</curve>
</curves>
<process_variables>
<process_variable>
<name>displacement</name>
<components>3</components>
<order>2</order>
<compensate_non_equilibrium_initial_residuum>true</compensate_non_equilibrium_initial_residuum>
<initial_condition>displacement0</initial_condition>
<boundary_conditions>
<boundary_condition>
<geometrical_set>cube_1x1x1_geometry</geometrical_set>
<geometry>left</geometry>
<type>Dirichlet</type>
<component>0</component>
<parameter>dirichlet0</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>cube_1x1x1_geometry</geometrical_set>
<geometry>front</geometry>
<type>Dirichlet</type>
<component>1</component>
<parameter>dirichlet0</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>cube_1x1x1_geometry</geometrical_set>
<geometry>bottom</geometry>
<type>Dirichlet</type>
<component>2</component>
<parameter>dirichlet0</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>cube_1x1x1_geometry</geometrical_set>
<geometry>top</geometry>
<type>Dirichlet</type>
<component>2</component>
<parameter>dirichlet0</parameter>
</boundary_condition>
</boundary_conditions>
</process_variable>
<process_variable>
<name>pressure</name>
<components>1</components>
<order>1</order>
<compensate_non_equilibrium_initial_residuum>true</compensate_non_equilibrium_initial_residuum>
<initial_condition>p0</initial_condition>
<boundary_conditions>
<boundary_condition>
<geometrical_set>cube_1x1x1_geometry</geometrical_set>
<geometry>right</geometry>
<type>Dirichlet</type>
<parameter>pressure_bc</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>cube_1x1x1_geometry</geometrical_set>
<geometry>bottom</geometry>
<type>Dirichlet</type>
<parameter>pressure_bc</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>cube_1x1x1_geometry</geometrical_set>
<geometry>front</geometry>
<type>Dirichlet</type>
<parameter>pressure_bc</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>cube_1x1x1_geometry</geometrical_set>
<geometry>left</geometry>
<type>Dirichlet</type>
<parameter>pressure_bc</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>cube_1x1x1_geometry</geometrical_set>
<geometry>top</geometry>
<type>Dirichlet</type>
<parameter>pressure_bc</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>cube_1x1x1_geometry</geometrical_set>
<geometry>back</geometry>
<type>Dirichlet</type>
<parameter>pressure_bc</parameter>
</boundary_condition>
</boundary_conditions>
</process_variable>
</process_variables>
<nonlinear_solvers>
<nonlinear_solver>
<name>nonlinear_solver</name>
<type>Newton</type>
<max_iter>100</max_iter>
<linear_solver>general_linear_solver</linear_solver>
</nonlinear_solver>
</nonlinear_solvers>
<linear_solvers>
<linear_solver>
<name>general_linear_solver</name>
<eigen>
<solver_type>SparseLU</solver_type>
<scaling>true</scaling>
</eigen>
</linear_solver>
</linear_solvers>
<test_definition>
<vtkdiff>
<regex>bishops_effective_stress_power_law_ts_.*.vtu</regex>
<field>pressure</field>
<absolute_tolerance>1e-15</absolute_tolerance>
<relative_tolerance>0</relative_tolerance>
</vtkdiff>
<vtkdiff>
<regex>bishops_effective_stress_power_law_ts_.*.vtu</regex>
<field>saturation</field>
<absolute_tolerance>1e-14</absolute_tolerance>
<relative_tolerance>1e-15</relative_tolerance>
</vtkdiff>
<vtkdiff>
<regex>bishops_effective_stress_power_law_ts_.*.vtu</regex>
<field>displacement</field>
<absolute_tolerance>1e-15</absolute_tolerance>
<relative_tolerance>0</relative_tolerance>
</vtkdiff>
<vtkdiff>
<regex>bishops_effective_stress_power_law_ts_.*.vtu</regex>
<field>sigma</field>
<absolute_tolerance>5e-15</absolute_tolerance>
<relative_tolerance>0</relative_tolerance>
</vtkdiff>
<vtkdiff>
<regex>bishops_effective_stress_power_law_ts_.*.vtu</regex>
<field>epsilon</field>
<absolute_tolerance>2e-15</absolute_tolerance>
<relative_tolerance>0</relative_tolerance>
</vtkdiff>
<vtkdiff>
<regex>bishops_effective_stress_power_law_ts_.*.vtu</regex>
<field>velocity</field>
<absolute_tolerance>1e-15</absolute_tolerance>
<relative_tolerance>0</relative_tolerance>
</vtkdiff>
<vtkdiff>
<regex>bishops_effective_stress_power_law_ts_.*.vtu</regex>
<field>porosity</field>
<absolute_tolerance>5e-15</absolute_tolerance>
<relative_tolerance>1e-15</relative_tolerance>
</vtkdiff>
<vtkdiff>
<regex>bishops_effective_stress_power_law_ts_.*.vtu</regex>
<field>porosity_avg</field>
<absolute_tolerance>5e-15</absolute_tolerance>
<relative_tolerance>1e-15</relative_tolerance>
</vtkdiff>
</test_definition>
</OpenGeoSysProject>
1.12.0