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OGS
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OGS
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<OpenGeoSysProject>
<mesh>mesh.vtu</mesh>
<geometry>geometry.gml</geometry>
<search_length_algorithm>
<type>fixed</type>
<value>1e-1</value>
</search_length_algorithm>
<processes>
<process>
<name>ThermoMechanics</name>
<type>THERMO_MECHANICS</type>
<integration_order>2</integration_order>
<constitutive_relation id="0">
<type>LinearElasticIsotropic</type>
<youngs_modulus>E0</youngs_modulus>
<poissons_ratio>nu0</poissons_ratio>
</constitutive_relation>
<constitutive_relation id="1">
<type>CreepBGRa</type>
<youngs_modulus>E1</youngs_modulus>
<poissons_ratio>nu1</poissons_ratio>
<a>A</a>
<n>n</n>
<sigma0>sigma_f</sigma0>
<q>Q</q>
<nonlinear_solver>
<maximum_iterations>1000</maximum_iterations>
<residuum_tolerance>2e-8</residuum_tolerance>
<increment_tolerance>0</increment_tolerance>
</nonlinear_solver>
</constitutive_relation>
<process_variables>
<displacement>displacement</displacement>
<temperature>temperature</temperature>
</process_variables>
<secondary_variables>
<secondary_variable internal_name="sigma" output_name="sigma" />
<secondary_variable internal_name="epsilon" output_name="epsilon" />
</secondary_variables>
<specific_body_force>0 -9.81</specific_body_force>
</process>
</processes>
<media>
<medium id="0">
<phases>
<phase>
<type>Solid</type>
<properties>
<property>
<name>thermal_expansivity</name>
<type>Constant</type>
<value>4e-5</value>
</property>
<property>
<name>thermal_conductivity</name>
<type>Constant</type>
<value>5</value>
</property>
<property>
<name>density</name>
<type>Exponential</type>
<reference_value>2000</reference_value>
<exponent>
<variable_name>temperature</variable_name>
<reference_condition>283.15</reference_condition>
<factor>-1.2e-5</factor>
</exponent>
<offset>0.0</offset>
</property>
<property>
<name>specific_heat_capacity</name>
<type>Constant</type>
<value>0.</value>
</property>
</properties>
</phase>
</phases>
</medium>
<medium id="1">
<phases>
<phase>
<type>Solid</type>
<properties>
<property>
<name>thermal_expansivity</name>
<type>Constant</type>
<value>4e-5</value>
</property>
<property>
<name>thermal_conductivity</name>
<type>Constant</type>
<value>5</value>
</property>
<property>
<name>density</name>
<type>Exponential</type>
<reference_value>2170</reference_value>
<exponent>
<variable_name>temperature</variable_name>
<reference_condition>283.15</reference_condition>
<factor>-1.2e-5</factor>
</exponent>
<offset>0.0</offset>
</property>
<property>
<name>specific_heat_capacity</name>
<type>Constant</type>
<value>0.</value>
</property>
</properties>
</phase>
</phases>
</medium>
</media>
<time_loop>
<processes>
<process ref="ThermoMechanics">
<nonlinear_solver>basic_newton</nonlinear_solver>
<convergence_criterion>
<type>DeltaX</type>
<norm_type>NORM2</norm_type>
<abstol>1e-11</abstol>
</convergence_criterion>
<time_discretization>
<type>BackwardEuler</type>
</time_discretization>
<time_stepping>
<type>FixedTimeStepping</type>
<t_initial>0</t_initial>
<t_end>43200e+2</t_end>
<timesteps>
<pair>
<repeat>1</repeat>
<delta_t>86400.0e-3</delta_t>
</pair>
<pair>
<repeat>10</repeat>
<delta_t>86400.0e-2</delta_t>
</pair>
<pair>
<repeat>500</repeat>
<delta_t>86400.0</delta_t>
</pair>
</timesteps>
</time_stepping>
</process>
</processes>
<output>
<type>VTK</type>
<prefix>CreepAfterExcavation</prefix>
<timesteps>
<pair>
<repeat>10</repeat>
<each_steps>2</each_steps>
</pair>
<pair>
<repeat>1</repeat>
<each_steps>10</each_steps>
</pair>
</timesteps>
<variables>
<variable>displacement</variable>
<variable>temperature</variable>
<variable>sigma</variable>
<variable>epsilon</variable>
</variables>
<suffix>ts{:timestep}_t_{:time}</suffix>
</output>
</time_loop>
<parameters>
<parameter>
<name>A</name>
<type>Constant</type>
<value>2.0833333333333333e-6</value>
</parameter>
<parameter>
<name>n</name>
<type>Constant</type>
<value>4.9</value>
</parameter>
<parameter>
<name>sigma_f</name>
<type>Constant</type>
<value>1.0e+6</value>
</parameter>
<parameter>
<name>Q</name>
<type>Constant</type>
<value>54000</value>
</parameter>
<parameter>
<name>E1</name>
<type>Constant</type>
<value>7.65e9</value>
</parameter>
<parameter>
<name>nu1</name>
<type>Constant</type>
<value>0.27</value>
</parameter>
<parameter>
<name>nu0</name>
<type>Constant</type>
<value>0.3</value>
</parameter>
<parameter>
<name>E0</name>
<type>Constant</type>
<value>7e9</value>
</parameter>
<parameter>
<name>temperature_ic</name>
<type>MeshNode</type>
<field_name>T0</field_name>
</parameter>
<parameter>
<name>temperature_t</name>
<type>Constant</type>
<value>310</value>
</parameter>
<parameter>
<name>temperature_circ</name>
<type>Constant</type>
<value>300</value>
</parameter>
<parameter>
<name>temperature_b</name>
<type>Constant</type>
<value>320</value>
</parameter>
<parameter>
<name>displacement0</name>
<type>Constant</type>
<values>0 0</values>
</parameter>
<parameter>
<name>u_bc</name>
<type>Constant</type>
<value>0.</value>
</parameter>
<parameter>
<name>s_top</name>
<type>Constant</type>
<value>-1.0e+7</value>
</parameter>
</parameters>
<process_variables>
<process_variable>
<name>displacement</name>
<components>2</components>
<order>1</order>
<initial_condition>displacement0</initial_condition>
<boundary_conditions>
<boundary_condition>
<geometrical_set>geo</geometrical_set>
<geometry>left</geometry>
<type>Dirichlet</type>
<component>0</component>
<parameter>u_bc</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>geo</geometrical_set>
<geometry>right</geometry>
<type>Dirichlet</type>
<component>0</component>
<parameter>u_bc</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>geo</geometrical_set>
<geometry>bottom</geometry>
<type>Dirichlet</type>
<component>1</component>
<parameter>u_bc</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>geo</geometrical_set>
<geometry>top</geometry>
<type>Neumann</type>
<component>1</component>
<parameter>s_top</parameter>
</boundary_condition>
</boundary_conditions>
</process_variable>
<process_variable>
<name>temperature</name>
<components>1</components>
<order>1</order>
<initial_condition>temperature_ic</initial_condition>
<boundary_conditions>
<boundary_condition>
<geometrical_set>geo</geometrical_set>
<geometry>top</geometry>
<type>Dirichlet</type>
<parameter>temperature_t</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>geo</geometrical_set>
<geometry>bottom</geometry>
<type>Dirichlet</type>
<parameter>temperature_b</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>geo</geometrical_set>
<geometry>circle</geometry>
<type>Dirichlet</type>
<parameter>temperature_circ</parameter>
</boundary_condition>
</boundary_conditions>
</process_variable>
</process_variables>
<nonlinear_solvers>
<nonlinear_solver>
<name>basic_newton</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>
<lis>-i bicgstab -p jacobi -tol 1e-11 -maxiter 10000</lis>
<eigen>
<solver_type>BiCGSTAB</solver_type>
<precon_type>DIAGONAL</precon_type>
<max_iteration_step>10000</max_iteration_step>
<error_tolerance>1e-16</error_tolerance>
</eigen>
</linear_solver>
</linear_solvers>
</OpenGeoSysProject>
1.12.0