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OGS
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OGS
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<OpenGeoSysProject>
<mesh>Twophase_Lia_quad.vtu</mesh>
<geometry>Twophase_Lia.gml</geometry>
<processes>
<process>
<name>GW23</name>
<type>TWOPHASE_FLOW_PP</type>
<integration_order>2</integration_order>
<jacobian_assembler>
<type>CentralDifferences</type>
<component_magnitudes>1e4 1e+5</component_magnitudes>
<relative_epsilons>1e-7 1e-7</relative_epsilons>
</jacobian_assembler>
<process_variables>
<gas_pressure>gas_pressure</gas_pressure>
<capillary_pressure>capillary_pressure</capillary_pressure>
</process_variables>
<secondary_variables>
<secondary_variable internal_name="saturation" output_name="saturation" />
</secondary_variables>
<specific_body_force>0 -9.81</specific_body_force>
<mass_lumping>true</mass_lumping>
<temperature>temp</temperature>
</process>
</processes>
<media>
<medium id="0">
<phases>
<phase>
<type>AqueousLiquid</type>
<properties>
<property>
<name>density</name>
<type>Constant</type>
<value>1.0e3</value>
</property>
<property>
<name>viscosity</name>
<type>Constant</type>
<value>1e-3</value>
</property>
</properties>
</phase>
<phase>
<type>Gas</type>
<properties>
<property>
<name>density</name>
<type>IdealGasLaw</type>
</property>
<property>
<name>viscosity</name>
<type>Constant</type>
<value>1.8e-5</value>
</property>
<property>
<name>molar_mass</name>
<type>Constant</type>
<value>0.02896</value>
</property>
</properties>
</phase>
</phases>
<properties>
<property>
<name>permeability</name>
<type>Constant</type>
<value>4.5e-13</value>
</property>
<property>
<name>saturation</name>
<type>SaturationLiakopoulos</type>
</property>
<property>
<name>relative_permeability</name>
<type>RelPermLiakopoulos</type>
</property>
<property>
<name>relative_permeability_nonwetting_phase</name>
<type>RelPermBrooksCoreyNonwettingPhase</type>
<residual_liquid_saturation>0.2</residual_liquid_saturation>
<residual_gas_saturation>0.0</residual_gas_saturation>
<min_relative_permeability>1.0e-4</min_relative_permeability>
<lambda>3.0</lambda>
</property>
<property>
<name>porosity</name>
<type>Constant</type>
<value>0.2975</value>
</property>
</properties>
</medium>
</media>
<parameters>
<parameter>
<name>pc_Dirichlet_bottom</name>
<type>Constant</type>
<value>100.0</value>
</parameter>
<parameter>
<name>pg_Dirichlet_bottom</name>
<type>Constant</type>
<value>101325.0</value>
</parameter>
<parameter>
<name>pg_Dirichlet_top</name>
<type>Constant</type>
<value>101325.0</value>
</parameter>
<parameter>
<name>pc_0</name>
<type>Constant</type>
<values>100.0</values>
</parameter>
<parameter>
<name>pg_0</name>
<type>Constant</type>
<value>101325.0</value>
</parameter>
<parameter>
<name>temp</name>
<type>Constant</type>
<value>293.15</value>
</parameter>
<parameter>
<name>constant_porosity_parameter</name>
<type>Constant</type>
<value>2.975000e-001</value>
</parameter>
<parameter>
<name>kappa1</name>
<type>Constant</type>
<values>4.500000e-13</values>
</parameter>
</parameters>
<time_loop>
<processes>
<process ref="GW23">
<nonlinear_solver>basic_newton</nonlinear_solver>
<convergence_criterion>
<type>DeltaX</type>
<norm_type>NORM2</norm_type>
<abstol>1.e-7</abstol>
</convergence_criterion>
<time_discretization>
<type>BackwardEuler</type>
</time_discretization>
<time_stepping>
<type>FixedTimeStepping</type>
<t_initial>0</t_initial>
<t_end>20</t_end>
<timesteps>
<pair>
<repeat>100</repeat>
<delta_t>0.01</delta_t>
</pair>
<pair>
<repeat>40</repeat>
<delta_t>0.2</delta_t>
</pair>
<pair>
<repeat>100</repeat>
<delta_t>0.01</delta_t>
</pair>
<pair>
<repeat>40</repeat>
<delta_t>0.2</delta_t>
</pair>
</timesteps>
</time_stepping>
</process>
</processes>
<output>
<type>VTK</type>
<prefix>twophaseflow</prefix>
<timesteps>
<pair>
<repeat>1</repeat>
<each_steps>290</each_steps>
</pair>
</timesteps>
<output_iteration_results>false</output_iteration_results>
<variables>
<variable>capillary_pressure</variable>
<variable>gas_pressure</variable>
<variable>saturation</variable>
</variables>
<suffix>ts{:timestep}_t_{:time}</suffix>
</output>
</time_loop>
<process_variables>
<process_variable>
<name>gas_pressure</name>
<components>1</components>
<order>1</order>
<initial_condition>pg_0</initial_condition>
<boundary_conditions>
<boundary_condition>
<geometrical_set>Twophase_Lia_Geometry</geometrical_set>
<geometry>TOP</geometry>
<type>Dirichlet</type>
<parameter>pg_Dirichlet_top</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>Twophase_Lia_Geometry</geometrical_set>
<geometry>BOTTOM</geometry>
<type>Dirichlet</type>
<parameter>pg_Dirichlet_bottom</parameter>
</boundary_condition>
</boundary_conditions>
</process_variable>
<process_variable>
<name>capillary_pressure</name>
<components>1</components>
<order>1</order>
<initial_condition>pc_0</initial_condition>
<boundary_conditions>
<boundary_condition>
<geometrical_set>Twophase_Lia_Geometry</geometrical_set>
<geometry>BOTTOM</geometry>
<type>Dirichlet</type>
<parameter>pc_Dirichlet_bottom</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-18 -maxiter 10000</lis>
<eigen>
<solver_type>BiCGSTAB</solver_type>
<precon_type>ILUT</precon_type>
<max_iteration_step>10000</max_iteration_step>
<error_tolerance>1e-18</error_tolerance>
</eigen>
</linear_solver>
</linear_solvers>
</OpenGeoSysProject>
1.11.0