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OGS
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OGS
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<OpenGeoSysProject>
<mesh>tm1_1Dbeam.vtu</mesh>
<geometry>tm1_1Dbeam.gml</geometry>
<processes>
<process>
<name>ThermoMechanics</name>
<type>THERMO_MECHANICS</type>
<integration_order>3</integration_order>
<constitutive_relation>
<type>LinearElasticIsotropic</type>
<youngs_modulus>E</youngs_modulus>
<poissons_ratio>nu</poissons_ratio>
</constitutive_relation>
<specific_body_force>0 0 -9.81</specific_body_force>
<process_variables>
<temperature>temperature</temperature>
<displacement>displacement</displacement>
</process_variables>
<secondary_variables>
<secondary_variable internal_name="epsilon" output_name="epsilon" />
<secondary_variable internal_name="sigma" output_name="sigma" />
</secondary_variables>
</process>
</processes>
<media>
<medium>
<phases>
<phase>
<type>Solid</type>
<properties>
<property>
<name>density</name>
<type>Constant</type>
<value>0.</value>
</property>
<property>
<name>thermal_expansivity</name>
<type>Constant</type>
<value>3e-5</value>
</property>
<property>
<name>thermal_conductivity</name>
<type>Constant</type>
<value>1</value>
</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>PerComponentDeltaX</type>
<norm_type>NORM2</norm_type>
<reltols>1e-9 1e-9 1e+15 1e+15</reltols>
</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>tm1_1Dbeam</prefix>
<data_mode>Ascii</data_mode>
<compress_output>false</compress_output>
<timesteps>
<pair>
<repeat>1</repeat>
<each_steps>1</each_steps>
</pair>
</timesteps>
<variables>
<variable>temperature</variable>
<variable>displacement</variable>
<variable>sigma</variable>
<variable>epsilon</variable>
</variables>
<suffix>ts{:timestep}_t_{:time}</suffix>
</output>
</time_loop>
<parameters>
<parameter>
<name>E</name>
<type>Group</type>
<group_id_property>MaterialIDs</group_id_property>
<index_values>
<index>0</index>
<value>2.5e+10</value>
</index_values>
</parameter>
<parameter>
<name>nu</name>
<type>Group</type>
<group_id_property>MaterialIDs</group_id_property>
<index_values>
<index>0</index>
<value>0.25</value>
</index_values>
</parameter>
<parameter>
<name>zero</name>
<type>Constant</type>
<value>0.0</value>
</parameter>
<parameter>
<name>initial_temperature</name>
<type>Constant</type>
<value>0</value>
</parameter>
<parameter>
<name>initial_displacement</name>
<type>Constant</type>
<values>0 0 0</values>
</parameter>
<parameter>
<name>T0</name>
<type>Constant</type>
<value>0</value>
</parameter>
<parameter>
<name>T1</name>
<type>Constant</type>
<value>10</value>
</parameter>
</parameters>
<process_variables>
<process_variable>
<name>displacement</name>
<components>3</components>
<order>2</order>
<initial_condition>initial_displacement</initial_condition>
<boundary_conditions>
<boundary_condition>
<geometrical_set>geometry</geometrical_set>
<geometry>SURFACE1</geometry>
<type>Dirichlet</type>
<component>0</component>
<parameter>zero</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>geometry</geometrical_set>
<geometry>SURFACE2</geometry>
<type>Dirichlet</type>
<component>1</component>
<parameter>zero</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>geometry</geometrical_set>
<geometry>SURFACE3</geometry>
<type>Dirichlet</type>
<component>1</component>
<parameter>zero</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>geometry</geometrical_set>
<geometry>SURFACE4</geometry>
<type>Dirichlet</type>
<component>2</component>
<parameter>zero</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>geometry</geometrical_set>
<geometry>SURFACE5</geometry>
<type>Dirichlet</type>
<component>2</component>
<parameter>zero</parameter>
</boundary_condition>
</boundary_conditions>
</process_variable>
<process_variable>
<name>temperature</name>
<components>1</components>
<order>1</order>
<initial_condition>initial_temperature</initial_condition>
<boundary_conditions>
<boundary_condition>
<geometrical_set>geometry</geometrical_set>
<geometry>SURFACE6</geometry>
<type>Dirichlet</type>
<component>0</component>
<parameter>T0</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>geometry</geometrical_set>
<geometry>SURFACE7</geometry>
<type>Dirichlet</type>
<component>0</component>
<parameter>T1</parameter>
</boundary_condition>
</boundary_conditions>
</process_variable>
</process_variables>
<nonlinear_solvers>
<nonlinear_solver>
<name>basic_newton</name>
<type>Newton</type>
<max_iter>10</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-2 -maxiter 10000</lis>
<eigen>
<solver_type>BiCGSTAB</solver_type>
<precon_type>DIAGONAL</precon_type>
<max_iteration_step>10000</max_iteration_step>
<error_tolerance>1e-2</error_tolerance>
</eigen>
<petsc>
<prefix>tm</prefix>
<parameters>-tm_ksp_type cg -tm_pc_type bjacobi -tm_ksp_rtol 1e-10 -tm_ksp_max_it 10000</parameters>
</petsc>
</linear_solver>
</linear_solvers>
</OpenGeoSysProject>
1.12.0