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OGS
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OGS
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<OpenGeoSysProject>
<meshes>
<mesh>octant12_normal_domain.vtu</mesh>
<mesh>octant12_normal_physical_group_r.vtu</mesh>
<mesh>octant12_normal_physical_group_x.vtu</mesh>
<mesh>octant12_normal_physical_group_y.vtu</mesh>
<mesh>octant12_normal_physical_group_z.vtu</mesh>
</meshes>
<processes>
<process>
<name>MandelCryer</name>
<type>HYDRO_MECHANICS</type>
<coupling_scheme>
<type>staggered</type>
<fixed_stress_stabilization_parameter>0.7774</fixed_stress_stabilization_parameter>
</coupling_scheme>
<integration_order>3</integration_order>
<constitutive_relation>
<type>LinearElasticIsotropic</type>
<youngs_modulus>E</youngs_modulus>
<poissons_ratio>nu</poissons_ratio>
</constitutive_relation>
<process_variables>
<pressure>pressure</pressure>
<displacement>displacement</displacement>
</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_variables>
<specific_body_force>0 0 0</specific_body_force>
</process>
</processes>
<media>
<medium>
<phases>
<phase>
<type>Gas</type>
<properties>
<property>
<name>viscosity</name>
<type>Constant</type>
<value>1e-3</value>
</property>
<property>
<name>density</name>
<type>Constant</type>
<value>1e3</value>
</property>
</properties>
</phase>
<phase>
<type>Solid</type>
<properties>
<property>
<name>density</name>
<type>Constant</type>
<value>2500</value>
</property>
</properties>
</phase>
</phases>
<properties>
<property>
<name>porosity</name>
<type>Constant</type>
<value>0.2</value>
</property>
<property>
<name>biot_coefficient</name>
<type>Constant</type>
<value>1</value>
</property>
<property>
<name>reference_temperature</name>
<type>Constant</type>
<value>293.15</value>
</property>
<property>
<name>permeability</name>
<type>Constant</type>
<value>1e-11</value>
</property>
</properties>
</medium>
</media>
<time_loop>
<global_process_coupling>
<max_iter>250</max_iter>
<convergence_criteria>
<convergence_criterion>
<type>DeltaX</type>
<norm_type>NORM2</norm_type>
<abstol>1e-2</abstol>
</convergence_criterion>
<convergence_criterion>
<type>DeltaX</type>
<norm_type>NORM2</norm_type>
<abstol>1e-5</abstol>
</convergence_criterion>
</convergence_criteria>
</global_process_coupling>
<processes>
<process ref="MandelCryer">
<nonlinear_solver>basic_newton_p</nonlinear_solver>
<convergence_criterion>
<type>DeltaX</type>
<norm_type>NORM2</norm_type>
<abstol>1e-4</abstol>
</convergence_criterion>
<time_discretization>
<type>BackwardEuler</type>
</time_discretization>
<time_stepping>
<type>FixedTimeStepping</type>
<t_initial>0</t_initial>
<t_end>1e-2</t_end>
<timesteps>
<pair>
<repeat>10</repeat>
<delta_t>1e-2</delta_t>
</pair>
<pair>
<repeat>1</repeat>
<delta_t>1e-1</delta_t>
</pair>
</timesteps>
</time_stepping>
</process>
<process ref="MandelCryer">
<nonlinear_solver>basic_newton_u</nonlinear_solver>
<convergence_criterion>
<type>PerComponentDeltaX</type>
<norm_type>NORM2</norm_type>
<abstols>1e-7 1e-7 1e-7</abstols>
</convergence_criterion>
<time_discretization>
<type>BackwardEuler</type>
</time_discretization>
<time_stepping>
<type>FixedTimeStepping</type>
<t_initial>0</t_initial>
<t_end>1e-2</t_end>
<timesteps>
<pair>
<repeat>10</repeat>
<delta_t>1e-2</delta_t>
</pair>
<pair>
<repeat>1</repeat>
<delta_t>1e-1</delta_t>
</pair>
</timesteps>
</time_stepping>
</process>
</processes>
<output>
<type>VTK</type>
<prefix>results_MandelCryerStaggered</prefix>
<variables>
<variable>displacement</variable>
<variable>pressure</variable>
<variable>sigma</variable>
<variable>epsilon</variable>
<variable>velocity</variable>
</variables>
<suffix>ts{:timestep}_t_{:time}</suffix>
</output>
</time_loop>
<parameters>
<parameter>
<name>E</name>
<type>Constant</type>
<value>1e7</value>
</parameter>
<parameter>
<name>nu</name>
<type>Constant</type>
<value>0.1</value>
</parameter>
<parameter>
<name>zero_vector_3d</name>
<type>Constant</type>
<values>0 0 0</values>
</parameter>
<parameter>
<name>pressure_ic</name>
<type>Constant</type>
<values>0</values>
</parameter>
<parameter>
<name>pressure_bc</name>
<type>Constant</type>
<values>0</values>
</parameter>
<parameter>
<name>zero_scalar</name>
<type>Constant</type>
<value>0</value>
</parameter>
<parameter>
<name>overburden</name>
<type>Constant</type>
<value>-1000</value>
</parameter>
</parameters>
<process_variables>
<process_variable>
<name>pressure</name>
<components>1</components>
<order>1</order>
<initial_condition>pressure_ic</initial_condition>
<boundary_conditions>
<boundary_condition>
<mesh>octant12_normal_physical_group_r</mesh>
<type>Dirichlet</type>
<parameter>pressure_bc</parameter>
</boundary_condition>
</boundary_conditions>
</process_variable>
<process_variable>
<name>displacement</name>
<components>3</components>
<order>2</order>
<initial_condition>zero_vector_3d</initial_condition>
<boundary_conditions>
<boundary_condition>
<mesh>octant12_normal_physical_group_x</mesh>
<type>Dirichlet</type>
<component>0</component>
<parameter>zero_scalar</parameter>
</boundary_condition>
<boundary_condition>
<mesh>octant12_normal_physical_group_y</mesh>
<type>Dirichlet</type>
<component>1</component>
<parameter>zero_scalar</parameter>
</boundary_condition>
<boundary_condition>
<mesh>octant12_normal_physical_group_z</mesh>
<type>Dirichlet</type>
<component>2</component>
<parameter>zero_scalar</parameter>
</boundary_condition>
<boundary_condition>
<mesh>octant12_normal_physical_group_r</mesh>
<type>NormalTraction</type>
<parameter>overburden</parameter>
</boundary_condition>
</boundary_conditions>
</process_variable>
</process_variables>
<nonlinear_solvers>
<nonlinear_solver>
<name>basic_newton_p</name>
<type>Newton</type>
<max_iter>100</max_iter>
<linear_solver>linear_solver_p</linear_solver>
</nonlinear_solver>
<nonlinear_solver>
<name>basic_newton_u</name>
<type>Newton</type>
<max_iter>100</max_iter>
<linear_solver>linear_solver_u</linear_solver>
</nonlinear_solver>
</nonlinear_solvers>
<linear_solvers>
<linear_solver>
<name>linear_solver_p</name>
<lis>-i cg -p jacobi -tol 1e-14 -maxiter 10000</lis>
<eigen>
<solver_type>CG</solver_type>
<precon_type>DIAGONAL</precon_type>
<max_iteration_step>10000</max_iteration_step>
<error_tolerance>1e-14</error_tolerance>
</eigen>
<petsc>
<prefix>sd</prefix>
<parameters>-sd_ksp_type cg -sd_pc_type bjacobi -sd_ksp_rtol 1e-14 -sd_ksp_max_it 10000</parameters>
</petsc>
</linear_solver>
<linear_solver>
<name>linear_solver_u</name>
<lis>-i cg -p jacobi -tol 1e-16 -maxiter 10000</lis>
<eigen>
<solver_type>CG</solver_type>
<precon_type>DIAGONAL</precon_type>
<max_iteration_step>10000</max_iteration_step>
<error_tolerance>1e-16</error_tolerance>
</eigen>
<petsc>
<prefix>sd</prefix>
<parameters>-sd_ksp_type cg -sd_pc_type bjacobi -sd_ksp_rtol 1e-16 -sd_ksp_max_it 10000</parameters>
</petsc>
</linear_solver>
</linear_solvers>
</OpenGeoSysProject>
1.12.0