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OGS
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OGS
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<OpenGeoSysProject>
<meshes>
<mesh>mesh_2D.vtu</mesh>
<mesh>geometry_right.vtu</mesh>
<mesh>geometry_left.vtu</mesh>
</meshes>
<processes>
<process>
<name>HC</name>
<type>ComponentTransport</type>
<integration_order>4</integration_order>
<process_variables>
<concentration>C</concentration>
<pressure>pressure</pressure>
</process_variables>
<secondary_variables>
<secondary_variable internal_name="darcy_velocity" output_name="darcy_velocity" />
<secondary_variable internal_name="CFlux" output_name="CFlux" />
</secondary_variables>
<specific_body_force>0 0</specific_body_force>
</process>
</processes>
<media>
<medium id="0">
<phases>
<phase>
<type>AqueousLiquid</type>
<components>
<component>
<name>C</name>
<properties>
<property>
<name>pore_diffusion</name>
<type>Constant</type>
<value>1.e-9</value>
</property>
<property>
<name>retardation_factor</name>
<type>Constant</type>
<value>1.0</value>
</property>
<property>
<name>decay_rate</name>
<type>Parameter</type>
<parameter_name>decay</parameter_name>
</property>
</properties>
</component>
</components>
<properties>
<property>
<name>density</name>
<type>Constant</type>
<value>1</value>
</property>
<property>
<name>viscosity</name>
<type>Constant</type>
<value>1.0</value>
</property>
</properties>
</phase>
</phases>
<properties>
<property>
<name>permeability</name>
<type>Constant</type>
<value>1.e-9</value>
</property>
<property>
<name>porosity</name>
<type>Constant</type>
<value>0.15</value>
</property>
<property>
<name>longitudinal_dispersivity</name>
<type>Constant</type>
<value>0</value>
</property>
<property>
<name>transversal_dispersivity</name>
<type>Constant</type>
<value>0.0</value>
</property>
</properties>
</medium>
<medium id="1">
<phases>
<phase>
<type>AqueousLiquid</type>
<components>
<component>
<name>C</name>
<properties>
<property>
<name>pore_diffusion</name>
<type>Constant</type>
<value>1.e-9</value>
</property>
<property>
<name>retardation_factor</name>
<type>Constant</type>
<value>1.0</value>
</property>
<property>
<name>decay_rate</name>
<type>Parameter</type>
<parameter_name>decay</parameter_name>
</property>
</properties>
</component>
</components>
<properties>
<property>
<name>density</name>
<type>Constant</type>
<value>1</value>
</property>
<property>
<name>viscosity</name>
<type>Constant</type>
<value>1.0</value>
</property>
</properties>
</phase>
</phases>
<properties>
<property>
<name>permeability</name>
<type>Constant</type>
<value>1.e-9</value>
</property>
<property>
<name>porosity</name>
<type>Constant</type>
<value>0.65</value>
</property>
<property>
<name>longitudinal_dispersivity</name>
<type>Constant</type>
<value>0</value>
</property>
<property>
<name>transversal_dispersivity</name>
<type>Constant</type>
<value>0.0</value>
</property>
</properties>
</medium>
</media>
<parameters>
<parameter>
<name>decay</name>
<type>Constant</type>
<value>0</value>
</parameter>
<parameter>
<name>C_right</name>
<type>Constant</type>
<value>1</value>
</parameter>
<parameter>
<name>C_left</name>
<type>Constant</type>
<value>0</value>
</parameter>
<parameter>
<name>C_ini</name>
<type>Function</type>
<expression>var c1 := 1; var c0 := 0; var phi1 := 0.65; var phi0 := 0.15; var L := 0.8; var a0 := (c1 - c0) / (1 + phi0/phi1) * 2 / L; var a1 := (c1 - c0) / (1 + phi1/phi0) * 2 / L; var b0 := c0; var b1 := (2*c0 + c1 * (phi1/phi0 - 1)) / (1 + phi1/phi0); x < L/2 ? a0 * x + b0 : a1 * x + b1;</expression>
</parameter>
<parameter>
<name>p0</name>
<type>Constant</type>
<value>0</value>
</parameter>
<parameter>
<name>p1</name>
<type>Constant</type>
<value>0</value>
</parameter>
</parameters>
<process_variables>
<process_variable>
<name>pressure</name>
<components>1</components>
<order>1</order>
<initial_condition>p0</initial_condition>
<boundary_conditions>
<boundary_condition>
<mesh>geometry_left</mesh>
<type>Dirichlet</type>
<parameter>p1</parameter>
</boundary_condition>
<boundary_condition>
<mesh>geometry_right</mesh>
<type>Dirichlet</type>
<parameter>p0</parameter>
</boundary_condition>
</boundary_conditions>
</process_variable>
<process_variable>
<name>C</name>
<components>1</components>
<order>1</order>
<initial_condition>C_ini</initial_condition>
<boundary_conditions>
<boundary_condition>
<mesh>geometry_right</mesh>
<type>Dirichlet</type>
<parameter>C_right</parameter>
</boundary_condition>
<boundary_condition>
<mesh>geometry_left</mesh>
<type>Dirichlet</type>
<parameter>C_left</parameter>
</boundary_condition>
</boundary_conditions>
</process_variable>
</process_variables>
<time_loop>
<processes>
<process ref="HC">
<nonlinear_solver>basic_picard</nonlinear_solver>
<convergence_criterion>
<type>PerComponentDeltaX</type>
<norm_type>INFINITY_N</norm_type>
<abstols>1e-15 1e-15</abstols>
</convergence_criterion>
<time_discretization>
<type>BackwardEuler</type>
</time_discretization>
<time_stepping>
<type>FixedTimeStepping</type>
<t_initial>0.0</t_initial>
<t_end>4e8</t_end>
<timesteps>
<pair>
<repeat>4</repeat>
<delta_t>1e8</delta_t>
</pair>
</timesteps>
</time_stepping>
</process>
</processes>
<output>
<type>VTK</type>
<prefix>only_grad_c</prefix>
<timesteps>
<pair>
<repeat>1000</repeat>
<each_steps>1</each_steps>
</pair>
</timesteps>
<variables />
<output_extrapolation_residuals>true</output_extrapolation_residuals>
</output>
</time_loop>
<nonlinear_solvers>
<nonlinear_solver>
<name>basic_picard</name>
<type>Picard</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>
<eigen>
<solver_type>SparseLU</solver_type>
<scaling>true</scaling>
</eigen>
<petsc>
<prefix>hc</prefix>
<parameters>-hc_ksp_type bcgs -hc_pc_type bjacobi -hc_ksp_rtol 1e-8 -hc_ksp_max_it 20000</parameters>
</petsc>
</linear_solver>
</linear_solvers>
<test_definition>
<vtkdiff>
<file>only_grad_c_ts_4_t_400000000.000000.vtu</file>
<field>pressure</field>
<absolute_tolerance>1e-15</absolute_tolerance>
<relative_tolerance>0</relative_tolerance>
</vtkdiff>
<vtkdiff>
<file>only_grad_c_ts_4_t_400000000.000000.vtu</file>
<field>C</field>
<absolute_tolerance>1.4e-12</absolute_tolerance>
<relative_tolerance>0</relative_tolerance>
</vtkdiff>
<vtkdiff>
<file>only_grad_c_ts_4_t_400000000.000000.vtu</file>
<field>CFlux</field>
<absolute_tolerance>4.1e-20</absolute_tolerance>
<relative_tolerance>0</relative_tolerance>
</vtkdiff>
<vtkdiff>
<file>only_grad_c_ts_4_t_400000000.000000.vtu</file>
<field>CFlux_residual</field>
<absolute_tolerance>4.0e-20</absolute_tolerance>
<relative_tolerance>0</relative_tolerance>
</vtkdiff>
<vtkdiff>
<file>only_grad_c_ts_4_t_400000000.000000.vtu</file>
<field>darcy_velocity</field>
<absolute_tolerance>1e-25</absolute_tolerance>
<relative_tolerance>0</relative_tolerance>
</vtkdiff>
<vtkdiff>
<file>only_grad_c_ts_4_t_400000000.000000.vtu</file>
<field>darcy_velocity_residual</field>
<absolute_tolerance>1e-25</absolute_tolerance>
<relative_tolerance>0</relative_tolerance>
</vtkdiff>
</test_definition>
</OpenGeoSysProject>
1.12.0