<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>