diff --git a/Applications/ApplicationsLib/ProjectData.cpp b/Applications/ApplicationsLib/ProjectData.cpp
index 054015bfee0c402ad31b85dd7e783f4c453c46f7..e9d3bc5bc60df6b5df9fe465cbd3291db93cb33f 100644
--- a/Applications/ApplicationsLib/ProjectData.cpp
+++ b/Applications/ApplicationsLib/ProjectData.cpp
@@ -519,7 +519,7 @@ void ProjectData::parseProcesses(BaseLib::ConfigTree const& processes_config,
process = ProcessLib::LiquidFlow::createLiquidFlowProcess(
name, *_mesh_vec[0], std::move(jacobian_assembler),
_process_variables, _parameters, integration_order,
- process_config);
+ process_config, _mesh_vec, output_directory);
}
else
#endif
diff --git a/ProcessLib/LiquidFlow/CreateLiquidFlowProcess.cpp b/ProcessLib/LiquidFlow/CreateLiquidFlowProcess.cpp
index e35096b916406af1f647e0b2094c1a27d9be0949..4ae75493d11566131ffbaa2284c62d7eb01ea1c5 100644
--- a/ProcessLib/LiquidFlow/CreateLiquidFlowProcess.cpp
+++ b/ProcessLib/LiquidFlow/CreateLiquidFlowProcess.cpp
@@ -31,7 +31,9 @@ std::unique_ptr<Process> createLiquidFlowProcess(
std::vector<ProcessVariable> const& variables,
std::vector<std::unique_ptr<ParameterLib::ParameterBase>> const& parameters,
unsigned const integration_order,
- BaseLib::ConfigTree const& config)
+ BaseLib::ConfigTree const& config,
+ std::vector<std::unique_ptr<MeshLib::Mesh>> const& meshes,
+ std::string const& output_directory)
{
//! \ogs_file_param{prj__processes__process__type}
config.checkConfigParameter("type", "LIQUID_FLOW");
@@ -99,11 +101,21 @@ std::unique_ptr<Process> createLiquidFlowProcess(
INFO("The liquid flow is in homogeneous porous media.");
}
+ std::unique_ptr<ProcessLib::SurfaceFluxData> surfaceflux;
+ auto calculatesurfaceflux_config =
+ //! \ogs_file_param{prj__processes__process__calculatesurfaceflux}
+ config.getConfigSubtreeOptional("calculatesurfaceflux");
+ if (calculatesurfaceflux_config)
+ {
+ surfaceflux = ProcessLib::SurfaceFluxData::createSurfaceFluxData(
+ *calculatesurfaceflux_config, meshes, output_directory);
+ }
+
return std::make_unique<LiquidFlowProcess>(
std::move(name), mesh, std::move(jacobian_assembler), parameters,
integration_order, std::move(process_variables),
std::move(secondary_variables), material_ids, gravity_axis_id, g,
- reference_temperature, mat_config);
+ reference_temperature, mat_config, std::move(surfaceflux));
}
} // namespace LiquidFlow
diff --git a/ProcessLib/LiquidFlow/CreateLiquidFlowProcess.h b/ProcessLib/LiquidFlow/CreateLiquidFlowProcess.h
index 18adc164b64fded253b6e76ab645959ac68f9102..db1ff098a5d8b13d0ad6eb17ff8d7d615a190f5b 100644
--- a/ProcessLib/LiquidFlow/CreateLiquidFlowProcess.h
+++ b/ProcessLib/LiquidFlow/CreateLiquidFlowProcess.h
@@ -26,6 +26,8 @@ std::unique_ptr<Process> createLiquidFlowProcess(
std::vector<ProcessVariable> const& variables,
std::vector<std::unique_ptr<ParameterLib::ParameterBase>> const& parameters,
unsigned const integration_order,
- BaseLib::ConfigTree const& config);
+ BaseLib::ConfigTree const& config,
+ std::vector<std::unique_ptr<MeshLib::Mesh>> const& meshes,
+ std::string const& output_directory);
} // namespace LiquidFlow
} // namespace ProcessLib
diff --git a/ProcessLib/LiquidFlow/LiquidFlowLocalAssembler-impl.h b/ProcessLib/LiquidFlow/LiquidFlowLocalAssembler-impl.h
index d35c32b83640ae384004c3e5c4ff667e7fe36253..63a60f7737186c674ca6bd0c29ff4be954365929 100644
--- a/ProcessLib/LiquidFlow/LiquidFlowLocalAssembler-impl.h
+++ b/ProcessLib/LiquidFlow/LiquidFlowLocalAssembler-impl.h
@@ -54,6 +54,47 @@ void LiquidFlowLocalAssembler<ShapeFunction, IntegrationMethod, GlobalDim>::
}
}
+template <typename ShapeFunction, typename IntegrationMethod,
+ unsigned GlobalDim>
+Eigen::Vector3d
+LiquidFlowLocalAssembler<ShapeFunction, IntegrationMethod, GlobalDim>::getFlux(
+ MathLib::Point3d const& p_local_coords, double const t,
+ std::vector<double> const& local_x) const
+{
+ // eval dNdx and invJ at p
+ auto const fe =
+ NumLib::createIsoparametricFiniteElement<ShapeFunction,
+ ShapeMatricesType>(_element);
+
+ typename ShapeMatricesType::ShapeMatrices shape_matrices(
+ ShapeFunction::DIM, GlobalDim, ShapeFunction::NPOINTS);
+
+ // Note: Axial symmetry is set to false here, because we only need dNdx
+ // here, which is not affected by axial symmetry.
+ fe.computeShapeFunctions(p_local_coords.getCoords(), shape_matrices,
+ GlobalDim, false);
+
+ // create pos object to access the correct media property
+ ParameterLib::SpatialPosition pos;
+ pos.setElementID(_element.getID());
+ const int material_id = _material_properties.getMaterialID(pos);
+
+ double pressure = 0.0;
+ NumLib::shapeFunctionInterpolate(local_x, shape_matrices.N, pressure);
+ const Eigen::MatrixXd& permeability = _material_properties.getPermeability(
+ material_id, t, pos, _element.getDimension(), pressure,
+ _reference_temperature);
+ const double mu =
+ _material_properties.getViscosity(pressure, _reference_temperature);
+
+ Eigen::Vector3d flux(0.0, 0.0, 0.0);
+ flux.head<GlobalDim>() =
+ -permeability / mu * shape_matrices.dNdx *
+ Eigen::Map<const NodalVectorType>(local_x.data(), local_x.size());
+
+ return flux;
+}
+
template <typename ShapeFunction, typename IntegrationMethod,
unsigned GlobalDim>
template <typename LaplacianGravityVelocityCalculator>
diff --git a/ProcessLib/LiquidFlow/LiquidFlowLocalAssembler.h b/ProcessLib/LiquidFlow/LiquidFlowLocalAssembler.h
index 4cbd7559c7509eafa6779b3df2875bf3cebbaff1..7295ebc69905e4733d3594bc8673f39c226a8134 100644
--- a/ProcessLib/LiquidFlow/LiquidFlowLocalAssembler.h
+++ b/ProcessLib/LiquidFlow/LiquidFlowLocalAssembler.h
@@ -128,6 +128,12 @@ public:
std::vector<double>& local_K_data,
std::vector<double>& local_b_data) override;
+ /// Computes the flux in the point \c p_local_coords that is given in local
+ /// coordinates using the values from \c local_x.
+ Eigen::Vector3d getFlux(MathLib::Point3d const& p_local_coords,
+ double const t,
+ std::vector<double> const& local_x) const override;
+
Eigen::Map<const Eigen::RowVectorXd> getShapeMatrix(
const unsigned integration_point) const override
{
diff --git a/ProcessLib/LiquidFlow/LiquidFlowProcess.cpp b/ProcessLib/LiquidFlow/LiquidFlowProcess.cpp
index bc76bfd561e33acafc85352f224b087d041f089c..2daa63dbdc4716de6e5168a9e6b792c01f9fedf8 100644
--- a/ProcessLib/LiquidFlow/LiquidFlowProcess.cpp
+++ b/ProcessLib/LiquidFlow/LiquidFlowProcess.cpp
@@ -18,6 +18,8 @@
#include "LiquidFlowLocalAssembler.h"
#include "LiquidFlowMaterialProperties.h"
#include "MeshLib/PropertyVector.h"
+// TODO(TF) used for output of flux, if output classes are ready this has to be changed
+#include "MeshLib/IO/writeMeshToFile.h"
#include "ProcessLib/Utils/CreateLocalAssemblers.h"
namespace ProcessLib
@@ -37,7 +39,8 @@ LiquidFlowProcess::LiquidFlowProcess(
int const gravitational_axis_id,
double const gravitational_acceleration,
double const reference_temperature,
- BaseLib::ConfigTree const& config)
+ BaseLib::ConfigTree const& config,
+ std::unique_ptr<ProcessLib::SurfaceFluxData>&& surfaceflux)
: Process(std::move(name), mesh, std::move(jacobian_assembler), parameters,
integration_order, std::move(process_variables),
std::move(secondary_variables)),
@@ -45,7 +48,8 @@ LiquidFlowProcess::LiquidFlowProcess(
_gravitational_acceleration(gravitational_acceleration),
_reference_temperature(reference_temperature),
_material_properties(
- createLiquidFlowMaterialProperties(config, parameters, material_ids))
+ createLiquidFlowMaterialProperties(config, parameters, material_ids)),
+ _surfaceflux(std::move(surfaceflux))
{
DBUG("Create Liquid flow process.");
}
@@ -121,5 +125,39 @@ void LiquidFlowProcess::computeSecondaryVariableConcrete(const double t,
x, _coupled_solutions);
}
+Eigen::Vector3d LiquidFlowProcess::getFlux(
+ std::size_t const element_id,
+ MathLib::Point3d const& p,
+ double const t,
+ std::vector<GlobalVector*> const& x) const
+{
+ // fetch local_x from primary variable
+ std::vector<GlobalIndexType> indices_cache;
+ auto const r_c_indices = NumLib::getRowColumnIndices(
+ element_id, *_local_to_global_index_map, indices_cache);
+ constexpr int process_id = 0; // monolithic scheme.
+ std::vector<double> local_x(x[process_id]->get(r_c_indices.rows));
+
+ return _local_assemblers[element_id]->getFlux(p, t, local_x);
+}
+
+// this is almost a copy of the implementation in the GroundwaterFlow
+void LiquidFlowProcess::postTimestepConcreteProcess(
+ std::vector<GlobalVector*> const& x,
+ const double t,
+ const double /*dt*/,
+ int const process_id)
+{
+ if (!_surfaceflux) // computing the surfaceflux is optional
+ {
+ return;
+ }
+
+ ProcessLib::ProcessVariable const& pv = getProcessVariables(process_id)[0];
+ _surfaceflux->integrate(x, t, *this, process_id, _integration_order, _mesh,
+ pv.getActiveElementIDs());
+ _surfaceflux->save(t);
+}
+
} // namespace LiquidFlow
} // namespace ProcessLib
diff --git a/ProcessLib/LiquidFlow/LiquidFlowProcess.h b/ProcessLib/LiquidFlow/LiquidFlowProcess.h
index 719791cc43c70244d9f2bacf08853f163890549e..7c80706ae914a9aff36de9537e4a54c91fc09d27 100644
--- a/ProcessLib/LiquidFlow/LiquidFlowProcess.h
+++ b/ProcessLib/LiquidFlow/LiquidFlowProcess.h
@@ -19,6 +19,7 @@
#include "MaterialLib/Fluid/FluidProperties/FluidProperties.h"
#include "NumLib/DOF/LocalToGlobalIndexMap.h"
#include "ProcessLib/Process.h"
+#include "ProcessLib/SurfaceFlux/SurfaceFluxData.h"
namespace MeshLib
{
@@ -69,19 +70,31 @@ public:
int const gravitational_axis_id,
double const gravitational_acceleration,
double const reference_temperature,
- BaseLib::ConfigTree const& config);
+ BaseLib::ConfigTree const& config,
+ std::unique_ptr<ProcessLib::SurfaceFluxData>&& surfaceflux);
void computeSecondaryVariableConcrete(double const t,
GlobalVector const& x,
int const process_id) override;
bool isLinear() const override { return true; }
+
+ Eigen::Vector3d getFlux(std::size_t const element_id,
+ MathLib::Point3d const& p,
+ double const t,
+ std::vector<GlobalVector*> const& x) const override;
+
int getGravitationalAxisID() const { return _gravitational_axis_id; }
double getGravitationalAcceleration() const
{
return _gravitational_acceleration;
}
+ void postTimestepConcreteProcess(std::vector<GlobalVector*> const& x,
+ const double t,
+ const double dt,
+ int const process_id) override;
+
private:
void initializeConcreteProcess(
NumLib::LocalToGlobalIndexMap const& dof_table,
@@ -105,6 +118,8 @@ private:
std::vector<std::unique_ptr<LiquidFlowLocalAssemblerInterface>>
_local_assemblers;
+
+ std::unique_ptr<ProcessLib::SurfaceFluxData> _surfaceflux;
};
} // namespace LiquidFlow
diff --git a/ProcessLib/LiquidFlow/Tests.cmake b/ProcessLib/LiquidFlow/Tests.cmake
index b0c7df40850436911324e3ca502db88e3e410ab3..bc1354b31c70e0c4e8d5c6a3e9aba94d1f42cf96 100644
--- a/ProcessLib/LiquidFlow/Tests.cmake
+++ b/ProcessLib/LiquidFlow/Tests.cmake
@@ -364,3 +364,33 @@ AddTest(
time_dependent_heterogeneous_source_term_pcs_0_ts_120_t_1200.000000.vtu time_dependent_heterogeneous_source_term_pcs_0_ts_120_t_1200.000000.vtu pressure pressure 1e-7 1e-13
time_dependent_heterogeneous_source_term_pcs_0_ts_200_t_2000.000000.vtu time_dependent_heterogeneous_source_term_pcs_0_ts_200_t_2000.000000.vtu pressure pressure 1e-7 1e-13
)
+
+AddTest(
+ NAME LiquidFlow_Flux_3D
+ PATH Parabolic/LiquidFlow/Flux
+ EXECUTABLE ogs
+ EXECUTABLE_ARGS cube_1e3_calculatesurfaceflux.prj
+ WRAPPER time
+ TESTER vtkdiff
+ REQUIREMENTS NOT OGS_USE_MPI
+ DIFF_DATA
+ cube_1x1x1_hex_1e3_complete_surface_left_right_dirichlet_specific_flux_t_0.432000_expected.vtu cube_1x1x1_hex_1e3_complete_surface_left_right_dirichlet_specific_flux_t_0.432000.vtu specific_flux specific_flux 1e-7 1e-13
+ cube_1x1x1_hex_1e3_complete_surface_left_right_dirichlet_specific_flux_t_0.864000_expected.vtu cube_1x1x1_hex_1e3_complete_surface_left_right_dirichlet_specific_flux_t_0.864000.vtu specific_flux specific_flux 1e-7 1e-13
+ LF_cube_1e3_calculatesurfaceflux_pcs_0_ts_1_t_0.432000_expected.vtu LF_cube_1e3_calculatesurfaceflux_pcs_0_ts_1_t_0.432000.vtu pressure pressure 1e-7 1e-13
+ LF_cube_1e3_calculatesurfaceflux_pcs_0_ts_2_t_0.864000_expected.vtu LF_cube_1e3_calculatesurfaceflux_pcs_0_ts_2_t_0.864000.vtu pressure pressure 1e-7 1e-13
+)
+
+AddTest(
+ NAME LiquidFlow_Flux_2D
+ PATH Parabolic/LiquidFlow/Flux/2D
+ EXECUTABLE ogs
+ EXECUTABLE_ARGS square_1e1_calculatesurfaceflux.prj
+ WRAPPER time
+ TESTER vtkdiff
+ REQUIREMENTS NOT OGS_USE_MPI
+ DIFF_DATA
+ square_1x1_quad_1e1_complete_surface_left_right_dirichlet_specific_flux_t_0.432000_expected.vtu square_1x1_quad_1e1_complete_surface_left_right_dirichlet_specific_flux_t_0.432000.vtu specific_flux specific_flux 1e-7 1e-13
+ square_1x1_quad_1e1_complete_surface_left_right_dirichlet_specific_flux_t_0.864000_expected.vtu square_1x1_quad_1e1_complete_surface_left_right_dirichlet_specific_flux_t_0.864000.vtu specific_flux specific_flux 1e-7 1e-13
+ LF_square_1e1_surfaceflux_pcs_0_ts_1_t_0.432000_expected.vtu LF_square_1e1_surfaceflux_pcs_0_ts_1_t_0.432000.vtu pressure pressure 1e-7 1e-13
+ LF_square_1e1_surfaceflux_pcs_0_ts_2_t_0.864000_expected.vtu LF_square_1e1_surfaceflux_pcs_0_ts_2_t_0.864000.vtu pressure pressure 1e-7 1e-13
+)
diff --git a/ProcessLib/SurfaceFlux/SurfaceFluxLocalAssembler.h b/ProcessLib/SurfaceFlux/SurfaceFluxLocalAssembler.h
index a3cbb1543164f751880555a2e3871cecd28b0ae0..79c07180d884565135a1b72e2c1298d0f05a658c 100644
--- a/ProcessLib/SurfaceFlux/SurfaceFluxLocalAssembler.h
+++ b/ProcessLib/SurfaceFlux/SurfaceFluxLocalAssembler.h
@@ -120,13 +120,34 @@ public:
std::vector<GlobalVector*> const&)>
getFlux) override
{
- auto surface_element_normal =
- MeshLib::FaceRule::getSurfaceNormal(&_surface_element);
- surface_element_normal.normalize();
- // At the moment (2016-09-28) the surface normal is not oriented
- // according to the right hand rule
- // for correct results it is necessary to multiply the normal with -1
- surface_element_normal *= -1;
+ auto get_surface_normal =
+ [this, &bulk_mesh](
+ MeshLib::Element const& surface_element) -> MathLib::Vector3 {
+ MathLib::Vector3 surface_element_normal;
+ if (surface_element.getGeomType() == MeshLib::MeshElemType::LINE)
+ {
+ auto const bulk_normal = MeshLib::FaceRule::getSurfaceNormal(
+ bulk_mesh.getElements()[_bulk_element_id]);
+ MathLib::Vector3 const line{*_surface_element.getNodes()[0],
+ *_surface_element.getNodes()[1]};
+ surface_element_normal =
+ MathLib::crossProduct(bulk_normal, line);
+ }
+ else
+ {
+ surface_element_normal =
+ MeshLib::FaceRule::getSurfaceNormal(&surface_element);
+ }
+ surface_element_normal.normalize();
+ // At the moment (2016-09-28) the surface normal is not oriented
+ // according to the right hand rule
+ // for correct results it is necessary to multiply the normal
+ // with -1
+ surface_element_normal *= -1;
+ return surface_element_normal;
+ };
+ auto const surface_element_normal =
+ get_surface_normal(_surface_element);
double element_area = 0.0;
std::size_t const n_integration_points =
@@ -142,7 +163,6 @@ public:
bulk_mesh, _bulk_element_id, _bulk_face_id, wp);
auto const bulk_flux =
getFlux(_bulk_element_id, bulk_element_point, t, x);
-
for (int component_id(0);
component_id < specific_flux.getNumberOfComponents();
++component_id)
diff --git a/Tests/Data/Parabolic/LiquidFlow/Flux/2D/LF_square_1e1_surfaceflux_pcs_0_ts_1_t_0.432000_expected.vtu b/Tests/Data/Parabolic/LiquidFlow/Flux/2D/LF_square_1e1_surfaceflux_pcs_0_ts_1_t_0.432000_expected.vtu
new file mode 100644
index 0000000000000000000000000000000000000000..7e3987acfb3ce9767c9d4fe13e83def1030ebf25
--- /dev/null
+++ b/Tests/Data/Parabolic/LiquidFlow/Flux/2D/LF_square_1e1_surfaceflux_pcs_0_ts_1_t_0.432000_expected.vtu
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:a09fca3e1cf6cc900db49ed46c6bb874a291a41cead6e334b24f35504003510b
+size 3284
diff --git a/Tests/Data/Parabolic/LiquidFlow/Flux/2D/LF_square_1e1_surfaceflux_pcs_0_ts_2_t_0.864000_expected.vtu b/Tests/Data/Parabolic/LiquidFlow/Flux/2D/LF_square_1e1_surfaceflux_pcs_0_ts_2_t_0.864000_expected.vtu
new file mode 100644
index 0000000000000000000000000000000000000000..92c9ace5027ed8f1076adc7fa3c3c43c312879d7
--- /dev/null
+++ b/Tests/Data/Parabolic/LiquidFlow/Flux/2D/LF_square_1e1_surfaceflux_pcs_0_ts_2_t_0.864000_expected.vtu
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:960089f24280fbce95e7f376a4fb9a1caa3da98457fcc83ed4b3736e19c3df54
+size 3256
diff --git a/Tests/Data/Parabolic/LiquidFlow/Flux/2D/square_1e1_calculatesurfaceflux.prj b/Tests/Data/Parabolic/LiquidFlow/Flux/2D/square_1e1_calculatesurfaceflux.prj
new file mode 100644
index 0000000000000000000000000000000000000000..4cf7d704cada8c92fe450fa9cef57112e6236532
--- /dev/null
+++ b/Tests/Data/Parabolic/LiquidFlow/Flux/2D/square_1e1_calculatesurfaceflux.prj
@@ -0,0 +1,177 @@
+<?xml version="1.0" encoding="ISO-8859-1"?>
+<OpenGeoSysProject>
+ <meshes>
+ <mesh>square_1x1_quad_1e1.vtu</mesh>
+ <mesh>square_1x1_quad_1e1_complete_surface.vtu</mesh>
+ <mesh>square_1x1_quad_1e1_left.vtu</mesh>
+ <mesh>square_1x1_quad_1e1_right.vtu</mesh>
+ </meshes>
+ <processes>
+ <process>
+ <name>LiquidFlow</name>
+ <type>LIQUID_FLOW</type>
+ <integration_order>2</integration_order>
+ <darcy_gravity>
+ <!-- axis_id: 0, 1, or the dimension of space minus one -->
+ <axis_id>0</axis_id>
+ <!-- g>=0. g=0: non gravity term -->
+ <g>0.</g>
+ </darcy_gravity>
+ <process_variables>
+ <process_variable>pressure</process_variable>
+ </process_variables>
+ <secondary_variables>
+ <secondary_variable internal_name="darcy_velocity" output_name="v"/>
+ </secondary_variables>
+ <calculatesurfaceflux>
+ <mesh>square_1x1_quad_1e1_complete_surface</mesh>
+ <property_name>specific_flux</property_name>
+ <output_mesh>square_1x1_quad_1e1_complete_surface_left_right_dirichlet_specific_flux.vtu</output_mesh>
+ </calculatesurfaceflux>
+ <material_property>
+ <fluid>
+ <density>
+ <type>Constant</type>
+ <value> 78.68 </value>
+ </density>
+ <viscosity>
+ <type>Constant</type>
+ <value> 1.295e-4 </value>
+ </viscosity>
+ </fluid>
+ <porous_medium>
+ <porous_medium id="0">
+ <permeability>
+ <permeability_tensor_entries>kappa1</permeability_tensor_entries>
+ <type>Constant</type>
+ </permeability>
+ <porosity>
+ <type>Constant</type>
+ <porosity_parameter>constant_porosity_parameter</porosity_parameter>
+ </porosity>
+ <storage>
+ <type>Constant</type>
+ <value> 8.05e-10 </value>
+ </storage>
+ </porous_medium>
+ </porous_medium>
+ </material_property>
+ </process>
+ </processes>
+ <time_loop>
+ <processes>
+ <process ref="LiquidFlow">
+ <nonlinear_solver>basic_picard</nonlinear_solver>
+ <convergence_criterion>
+ <type>DeltaX</type>
+ <norm_type>NORM2</norm_type>
+ <abstol>1.e-10</abstol>
+ </convergence_criterion>
+ <time_discretization>
+ <type>BackwardEuler</type>
+ </time_discretization>
+ <time_stepping>
+ <type>FixedTimeStepping</type>
+ <t_initial> 0.0 </t_initial>
+ <t_end> 0.864 </t_end>
+ <timesteps>
+ <pair>
+ <repeat>2</repeat>
+ <delta_t>0.432</delta_t>
+ </pair>
+ </timesteps>
+ </time_stepping>
+ </process>
+ </processes>
+ <output>
+ <type>VTK</type>
+ <prefix>LF_square_1e1_surfaceflux</prefix>
+ <timesteps>
+ <pair>
+ <repeat> 1 </repeat>
+ <each_steps> 1 </each_steps>
+ </pair>
+ </timesteps>
+ <variables>
+ <variable> pressure </variable>
+ <variable> v </variable>
+ </variables>
+ </output>
+ </time_loop>
+ <parameters>
+ <parameter>
+ <name>p0</name>
+ <type>Constant</type>
+ <value>5e6</value>
+ </parameter>
+ <parameter>
+ <name>p_Dirichlet_left</name>
+ <type>Constant</type>
+ <value>1e7</value>
+ </parameter>
+ <parameter>
+ <name>p_Dirichlet_right</name>
+ <type>Constant</type>
+ <value>1e6</value>
+ </parameter>
+ <parameter>
+ <name>constant_porosity_parameter</name>
+ <type>Constant</type>
+ <value>1</value>
+ </parameter>
+ <parameter>
+ <name>kappa1</name>
+ <type>Constant</type>
+ <values>9.2e-12 0 0 9.2e-12</values>
+ </parameter>
+ <parameter>
+ <name>p_spatial</name>
+ <type>Constant</type>
+ <value>1</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>square_1x1_quad_1e1_left</mesh>
+ <type>Dirichlet</type>
+ <parameter>p_Dirichlet_left</parameter>
+ </boundary_condition>
+ <boundary_condition>
+ <mesh>square_1x1_quad_1e1_right</mesh>
+ <type>Dirichlet</type>
+ <parameter>p_Dirichlet_right</parameter>
+ </boundary_condition>
+ </boundary_conditions>
+ </process_variable>
+ </process_variables>
+ <nonlinear_solvers>
+ <nonlinear_solver>
+ <name>basic_picard</name>
+ <type>Picard</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 cg -p jacobi -tol 1e-16 -maxiter 10000</lis>
+ <eigen>
+ <solver_type>CG</solver_type>
+ <precon_type>DIAGONAL</precon_type>
+ <max_iteration_step>10000</max_iteration_step>
+ <error_tolerance>1e-16</error_tolerance>
+ </eigen>
+ <petsc>
+ <prefix>lf</prefix>
+ <parameters>-lf_ksp_type cg -lf_pc_type bjacobi -lf_ksp_rtol 1e-16 -lf_ksp_max_it 10000</parameters>
+ </petsc>
+ </linear_solver>
+ </linear_solvers>
+</OpenGeoSysProject>
diff --git a/Tests/Data/Parabolic/LiquidFlow/Flux/2D/square_1x1_quad_1e1.vtu b/Tests/Data/Parabolic/LiquidFlow/Flux/2D/square_1x1_quad_1e1.vtu
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+++ b/Tests/Data/Parabolic/LiquidFlow/Flux/2D/square_1x1_quad_1e1.vtu
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
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diff --git a/Tests/Data/Parabolic/LiquidFlow/Flux/2D/square_1x1_quad_1e1_complete_surface_left_right_dirichlet_specific_flux_t_0.432000_expected.vtu b/Tests/Data/Parabolic/LiquidFlow/Flux/2D/square_1x1_quad_1e1_complete_surface_left_right_dirichlet_specific_flux_t_0.432000_expected.vtu
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diff --git a/Tests/Data/Parabolic/LiquidFlow/Flux/cube_1e3_calculatesurfaceflux.prj b/Tests/Data/Parabolic/LiquidFlow/Flux/cube_1e3_calculatesurfaceflux.prj
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index 0000000000000000000000000000000000000000..b1b890a967422118e6b3d7e74759ff9046dbd1c0
--- /dev/null
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+<?xml version="1.0" encoding="ISO-8859-1"?>
+<OpenGeoSysProject>
+ <meshes>
+ <mesh>cube_1x1x1_hex_1e3.vtu</mesh>
+ <mesh>cube_1x1x1_hex_1e3_complete_surface.vtu</mesh>
+ <mesh>cube_1x1x1_hex_1e3_left.vtu</mesh>
+ <mesh>cube_1x1x1_hex_1e3_right.vtu</mesh>
+ </meshes>
+ <processes>
+ <process>
+ <name>LiquidFlow</name>
+ <type>LIQUID_FLOW</type>
+ <integration_order>2</integration_order>
+ <darcy_gravity>
+ <!-- axis_id: 0, 1, or the dimension of space minus one -->
+ <axis_id>0</axis_id>
+ <!-- g>=0. g=0: non gravity term -->
+ <g>0.</g>
+ </darcy_gravity>
+ <process_variables>
+ <process_variable>pressure</process_variable>
+ </process_variables>
+ <secondary_variables>
+ <secondary_variable internal_name="darcy_velocity" output_name="v"/>
+ </secondary_variables>
+ <calculatesurfaceflux>
+ <mesh>cube_1x1x1_hex_1e3_complete_surface</mesh>
+ <property_name>specific_flux</property_name>
+ <output_mesh>cube_1x1x1_hex_1e3_complete_surface_left_right_dirichlet_specific_flux.vtu</output_mesh>
+ </calculatesurfaceflux>
+ <material_property>
+ <fluid>
+ <density>
+ <type>Constant</type>
+ <value> 78.68 </value>
+ </density>
+ <viscosity>
+ <type>Constant</type>
+ <value> 1.295e-4 </value>
+ </viscosity>
+ </fluid>
+ <porous_medium>
+ <porous_medium id="0">
+ <permeability>
+ <permeability_tensor_entries>kappa1</permeability_tensor_entries>
+ <type>Constant</type>
+ </permeability>
+ <porosity>
+ <type>Constant</type>
+ <porosity_parameter>constant_porosity_parameter</porosity_parameter>
+ </porosity>
+ <storage>
+ <type>Constant</type>
+ <value> 8.05e-10 </value>
+ </storage>
+ </porous_medium>
+ </porous_medium>
+ </material_property>
+ </process>
+ </processes>
+ <time_loop>
+ <processes>
+ <process ref="LiquidFlow">
+ <nonlinear_solver>basic_picard</nonlinear_solver>
+ <convergence_criterion>
+ <type>DeltaX</type>
+ <norm_type>NORM2</norm_type>
+ <abstol>1.e-10</abstol>
+ </convergence_criterion>
+ <time_discretization>
+ <type>BackwardEuler</type>
+ </time_discretization>
+ <time_stepping>
+ <type>FixedTimeStepping</type>
+ <t_initial> 0.0 </t_initial>
+ <t_end> 0.864 </t_end>
+ <timesteps>
+ <pair>
+ <repeat>2</repeat>
+ <delta_t>0.432</delta_t>
+ </pair>
+ </timesteps>
+ </time_stepping>
+ </process>
+ </processes>
+ <output>
+ <type>VTK</type>
+ <prefix>LF_cube_1e3_calculatesurfaceflux</prefix>
+ <timesteps>
+ <pair>
+ <repeat> 1 </repeat>
+ <each_steps> 1 </each_steps>
+ </pair>
+ </timesteps>
+ <variables>
+ <variable> pressure </variable>
+ <variable> v </variable>
+ </variables>
+ </output>
+ </time_loop>
+ <parameters>
+ <parameter>
+ <name>p0</name>
+ <type>Constant</type>
+ <value>5e6</value>
+ </parameter>
+ <parameter>
+ <name>p_Dirichlet_left</name>
+ <type>Constant</type>
+ <value>1e7</value>
+ </parameter>
+ <parameter>
+ <name>p_Dirichlet_right</name>
+ <type>Constant</type>
+ <value>1e6</value>
+ </parameter>
+ <parameter>
+ <name>constant_porosity_parameter</name>
+ <type>Constant</type>
+ <value>1</value>
+ </parameter>
+ <parameter>
+ <name>kappa1</name>
+ <type>Constant</type>
+ <values>9.2e-12 0 0 0 9.2e-12 0 0 0 9.2e-12</values>
+ </parameter>
+ <parameter>
+ <name>p_spatial</name>
+ <type>Constant</type>
+ <value>1</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>cube_1x1x1_hex_1e3_left</mesh>
+ <type>Dirichlet</type>
+ <parameter>p_Dirichlet_left</parameter>
+ </boundary_condition>
+ <boundary_condition>
+ <mesh>cube_1x1x1_hex_1e3_right</mesh>
+ <type>Dirichlet</type>
+ <parameter>p_Dirichlet_right</parameter>
+ </boundary_condition>
+ </boundary_conditions>
+ </process_variable>
+ </process_variables>
+ <nonlinear_solvers>
+ <nonlinear_solver>
+ <name>basic_picard</name>
+ <type>Picard</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 cg -p jacobi -tol 1e-16 -maxiter 10000</lis>
+ <eigen>
+ <solver_type>CG</solver_type>
+ <precon_type>DIAGONAL</precon_type>
+ <max_iteration_step>10000</max_iteration_step>
+ <error_tolerance>1e-16</error_tolerance>
+ </eigen>
+ <petsc>
+ <prefix>lf</prefix>
+ <parameters>-lf_ksp_type cg -lf_pc_type bjacobi -lf_ksp_rtol 1e-16 -lf_ksp_max_it 10000</parameters>
+ </petsc>
+ </linear_solver>
+ </linear_solvers>
+</OpenGeoSysProject>
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