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<?xml version="1.0" encoding="ISO-8859-1"?>
<OpenGeoSysProject>
<meshes>
<mesh>quad_with_half_hole_q.vtu</mesh>
<mesh>x0_up.vtu</mesh>
<mesh>x0_down.vtu</mesh>
<mesh>circ.vtu</mesh>
<mesh>x1.vtu</mesh>
<mesh>y0.vtu</mesh>
<mesh>y1.vtu</mesh>
</meshes>
<processes>
<process>
<name>HM</name>
<type>HYDRO_MECHANICS</type>
<integration_order>3</integration_order>
<dimension>2</dimension>
<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_xx" output_name="sigma_xx"/>
<secondary_variable internal_name="sigma_yy" output_name="sigma_yy"/>
<secondary_variable internal_name="sigma_zz" output_name="sigma_zz"/>
<secondary_variable internal_name="sigma_xy" output_name="sigma_xy"/>
<secondary_variable internal_name="epsilon_xx" output_name="epsilon_xx"/>
<secondary_variable internal_name="epsilon_yy" output_name="epsilon_yy"/>
<secondary_variable internal_name="epsilon_zz" output_name="epsilon_zz"/>
<secondary_variable internal_name="epsilon_xy" output_name="epsilon_xy"/>
<secondary_variable internal_name="velocity" output_name="velocity"/>
</secondary_variables>
<specific_body_force>0 0</specific_body_force>
</process>
</processes>
<time_loop>
<processes>
<process ref="HM">
<nonlinear_solver>basic_newton</nonlinear_solver>
<convergence_criterion>
<type>DeltaX</type>
<norm_type>NORM2</norm_type>
<reltol>1e-13</reltol>
</convergence_criterion>
<time_discretization>
<type>BackwardEuler</type>
</time_discretization>
<time_stepping>
<type>FixedTimeStepping</type>
<t_initial>0</t_initial>
<t_end>1</t_end>
<timesteps>
<pair>
<repeat>1</repeat>
<delta_t>1</delta_t>
</pair>
</timesteps>
</time_stepping>
</process>
</processes>
<output>
<type>VTK</type>
<prefix>quad_with_half_hole</prefix>
<timesteps>
<pair>
<repeat>1</repeat>
<each_steps>1</each_steps>
</pair>
</timesteps>
<variables>
<variable>displacement</variable>
<variable>pressure</variable>
<variable>sigma_xx</variable>
<variable>sigma_yy</variable>
<variable>sigma_zz</variable>
<variable>sigma_xy</variable>
<variable>epsilon_xx</variable>
<variable>epsilon_yy</variable>
<variable>epsilon_zz</variable>
<variable>epsilon_xy</variable>
<variable>velocity</variable>
</variables>
<suffix>_ts_{:timestep}_t_{:time}</suffix>
</output>
</time_loop>
<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>1000</value>
</property>
</properties>
</phase>
<phase>
<type>Solid</type>
<properties>
<property>
<name>porosity</name>
<type>Constant</type>
<value>0.15</value>
</property>
<property>
<name>density</name>
<type>Constant</type>
<value>2.65e+3</value>
</property>
<property>
<name>biot_coefficient</name>
<type>Constant</type>
<value>0.6</value>
</property>
</properties>
</phase>
</phases>
<properties>
<property>
<name>reference_temperature</name>
<type>Constant</type>
<value>293.15</value>
</property>
<property>
<name>permeability</name>
<initial_permeability>permeability0</initial_permeability>
<type>PermeabilityMohrCoulombFailureIndexModel</type>
<reference_permeability>1.0e-19</reference_permeability>
<fitting_factor>3.0</fitting_factor>
<cohesion>1.e+6</cohesion>
<friction_angle>15.0</friction_angle>
<maximum_permeability>1.0e-6</maximum_permeability>
<!--tensile_strength_parameter>0.8*c/tan(phi)</tensile_strength_parameter-->
<tensile_strength_parameter>2.985640646055102e6</tensile_strength_parameter>
</property>
</properties>
</medium>
</media>
<parameters>
<parameter>
<name>E</name>
<type>Constant</type>
<value>6.0e9</value>
</parameter>
<parameter>
<name>nu</name>
<type>Constant</type>
<value>0.3</value>
</parameter>
<parameter>
<name>permeability0</name>
<type>Constant</type>
<value>1.0e-20</value>
</parameter>
<parameter>
<name>displacement0</name>
<type>Constant</type>
<values>0 0</values>
</parameter>
<parameter>
<name>zero_displacement</name>
<type>Constant</type>
<value>0</value>
</parameter>
<parameter>
<name>pressure0</name>
<type>Constant</type>
<values>4.7e+6</values>
</parameter>
<parameter>
<name>p_tunnel</name>
<type>Constant</type>
<value>1.0e+5</value>
</parameter>
<parameter>
<name>stress_v</name>
<type>Constant</type>
<value>-1.2e+7</value>
</parameter>
<parameter>
<name>stress_H</name>
<type>Constant</type>
<value>-1.5e+7</value>
</parameter>
</parameters>
<process_variables>
<process_variable>
<name>displacement</name>
<components>2</components>
<order>2</order>
<initial_condition>displacement0</initial_condition>
<boundary_conditions>
<boundary_condition>
<mesh>y0</mesh>
<type>Dirichlet</type>
<component>1</component>
<parameter>zero_displacement</parameter>
</boundary_condition>
<boundary_condition>
<mesh>y1</mesh>
<type>Neumann</type>
<component>1</component>
<parameter>stress_v</parameter>
</boundary_condition>
<boundary_condition>
<mesh>x0_up</mesh>
<type>Dirichlet</type>
<component>0</component>
<parameter>zero_displacement</parameter>
</boundary_condition>
<boundary_condition>
<mesh>x0_down</mesh>
<type>Dirichlet</type>
<component>0</component>
<parameter>zero_displacement</parameter>
</boundary_condition>
<boundary_condition>
<mesh>x1</mesh>
<type>Neumann</type>
<component>0</component>
<parameter>stress_H</parameter>
</boundary_condition>
</boundary_conditions>
</process_variable>
<process_variable>
<name>pressure</name>
<components>1</components>
<order>2</order>
<initial_condition>pressure0</initial_condition>
<boundary_conditions>
<boundary_condition>
<mesh>circ</mesh>
<type>Dirichlet</type>
<component>0</component>
<parameter>p_tunnel</parameter>
</boundary_condition>
</boundary_conditions>
</process_variable>
</process_variables>
<nonlinear_solvers>
<nonlinear_solver>
<name>basic_newton</name>
<type>Newton</type>
<max_iter>50</max_iter>
<linear_solver>general_linear_solver</linear_solver>
</nonlinear_solver>
</nonlinear_solvers>
<linear_solvers>
<linear_solver>
<name>general_linear_solver</name>
<lis>-i bicgstab -p ilu -tol 1e-16 -maxiter 10000</lis>
<eigen>
<solver_type>BiCGSTAB</solver_type>
<precon_type>ILUT</precon_type>
<max_iteration_step>10000</max_iteration_step>
<error_tolerance>1e-16</error_tolerance>
</eigen>
</linear_solver>
</linear_solvers>
</OpenGeoSysProject>