<OpenGeoSysProject>
  <mesh axially_symmetric="true">SimpleAxisymmetricCreep.vtu</mesh>
  <geometry>boundary.gml</geometry>
  <processes>
    <process>
      <name>Creep</name>
      <type>THERMO_RICHARDS_MECHANICS</type>
      <integration_order>2</integration_order>
      <constitutive_relation>
        <type>CreepBGRa</type>
        <youngs_modulus>E</youngs_modulus>
        <poissons_ratio>nu</poissons_ratio>
        <a>A</a>
        <n>n</n>
        <sigma0>sigma_f</sigma0>
        <q>Q</q>
        <nonlinear_solver>
          <maximum_iterations>1000</maximum_iterations>
          <residuum_tolerance>1e-14</residuum_tolerance>
          <increment_tolerance>0</increment_tolerance>
        </nonlinear_solver>
      </constitutive_relation>
      <process_variables>
        <temperature>temperature</temperature>
        <pressure>pressure</pressure>
        <displacement>displacement</displacement>
      </process_variables>
      <secondary_variables>
        <secondary_variable name="sigma" />
        <secondary_variable name="epsilon" />
      </secondary_variables>
      <specific_body_force>0 0</specific_body_force>
    </process>
  </processes>
  <media>
    <medium>
      <phases>
        <phase>
          <type>AqueousLiquid</type>
          <properties>
            <property>
              <name>specific_heat_capacity</name>
              <type>Constant</type>
              <value>0</value>
            </property>
            <property>
              <name>thermal_conductivity</name>
              <type>Constant</type>
              <value>0.</value>
            </property>
            <property>
              <name>density</name>
              <type>Constant</type>
              <value>1.</value>
            </property>
            <property>
              <name>viscosity</name>
              <type>Constant</type>
              <value>1.e-3</value>
            </property>
          </properties>
        </phase>
        <phase>
          <type>Solid</type>
          <properties>
            <property>
              <name>thermal_conductivity</name>
              <type>Constant</type>
              <value>100</value>
            </property>
            <property>
              <name>density</name>
              <type>Constant</type>
              <value>0.</value>
            </property>
            <property>
              <name>thermal_expansivity</name>
              <type>Constant</type>
              <value>4e-5</value>
            </property>
            <property>
              <name>specific_heat_capacity</name>
              <type>Constant</type>
              <value>0</value>
            </property>
          </properties>
        </phase>
      </phases>
      <properties>
        <property>
          <name>saturation</name>
          <type>Constant</type>
          <value>1</value>
        </property>
        <property>
          <name>relative_permeability</name>
          <type>Constant</type>
          <value>1</value>
        </property>
        <property>
          <name>permeability</name>
          <type>Constant</type>
          <value>1e-12</value>
        </property>
        <property>
          <name>porosity</name>
          <type>Constant</type>
          <value>0.0</value>
        </property>
        <property>
          <name>bishops_effective_stress</name>
          <type>BishopsSaturationCutoff</type>
          <cutoff_value>1.0</cutoff_value>
        </property>
        <property>
          <name>biot_coefficient</name>
          <type>Constant</type>
          <value>1.0</value>
        </property>
        <property>
          <name>thermal_conductivity</name>
          <type>EffectiveThermalConductivityPorosityMixing</type>
        </property>
      </properties>
    </medium>
  </media>
  <time_loop>
    <processes>
      <process ref="Creep">
        <nonlinear_solver>basic_newton</nonlinear_solver>
        <convergence_criterion>
          <type>PerComponentDeltaX</type>
          <norm_type>NORM2</norm_type>
          <abstols>1e-12 1e-8 1e-12 1e-10</abstols>
          <reltols>1e-12 1e-8 1e-12 1e-10</reltols>
        </convergence_criterion>
        <time_discretization>
          <type>BackwardEuler</type>
        </time_discretization>
        <time_stepping>
          <type>FixedTimeStepping</type>
          <t_initial>0</t_initial>
          <t_end>360</t_end>
          <timesteps>
            <pair>
              <repeat>1</repeat>
              <delta_t>1.e-4</delta_t>
            </pair>
            <pair>
              <repeat>10</repeat>
              <delta_t>0.1</delta_t>
            </pair>
            <pair>
              <repeat>359</repeat>
              <delta_t>1.</delta_t>
            </pair>
          </timesteps>
        </time_stepping>
      </process>
    </processes>
    <output>
      <type>VTK</type>
      <prefix>SimpleAxisymmetricCreep</prefix>
      <timesteps>
        <pair>
          <repeat>1</repeat>
          <each_steps>1</each_steps>
        </pair>
        <pair>
          <repeat>1</repeat>
          <each_steps>360</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>0.18</value>
    </parameter>
    <parameter>
      <name>n</name>
      <type>Constant</type>
      <value>5.0</value>
    </parameter>
    <parameter>
      <name>sigma_f</name>
      <type>Constant</type>
      <value>1</value>
    </parameter>
    <parameter>
      <name>Q</name>
      <type>Constant</type>
      <value>54000</value>
    </parameter>
    <parameter>
      <name>E</name>
      <type>Constant</type>
      <value>25000</value>
    </parameter>
    <parameter>
      <name>nu</name>
      <type>Constant</type>
      <value>0.27</value>
    </parameter>
    <parameter>
      <name>temperature_ic</name>
      <type>Constant</type>
      <value>330.15</value>
    </parameter>
    <parameter>
      <name>temperature_bc</name>
      <type>Constant</type>
      <value>323.15</value>
    </parameter>
    <parameter>
      <name>displacement0</name>
      <type>Constant</type>
      <values>0 0</values>
    </parameter>
    <parameter>
      <name>p_bc</name>
      <type>Constant</type>
      <value>0.</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>cpreepBGRA</geometrical_set>
          <geometry>top</geometry>
          <type>Dirichlet</type>
          <component>1</component>
          <parameter>p_bc</parameter>
        </boundary_condition>
        <boundary_condition>
          <geometrical_set>cpreepBGRA</geometrical_set>
          <geometry>bottom</geometry>
          <type>Dirichlet</type>
          <component>1</component>
          <parameter>p_bc</parameter>
        </boundary_condition>
      </boundary_conditions>
    </process_variable>
    <process_variable>
      <name>pressure</name>
      <components>1</components>
      <order>1</order>
      <initial_condition>p_bc</initial_condition>
      <boundary_conditions>
        <boundary_condition>
          <type>Dirichlet</type>
          <mesh>SimpleAxisymmetricCreep</mesh>
          <parameter>p_bc</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>cpreepBGRA</geometrical_set>
          <geometry>top</geometry>
          <type>Dirichlet</type>
          <parameter>temperature_bc</parameter>
        </boundary_condition>
        <boundary_condition>
          <geometrical_set>cpreepBGRA</geometrical_set>
          <geometry>bottom</geometry>
          <type>Dirichlet</type>
          <parameter>temperature_bc</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 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-17</error_tolerance>
      </eigen>
    </linear_solver>
  </linear_solvers>
</OpenGeoSysProject>