HTProcess.cpp

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// SPDX-FileCopyrightText: Copyright (c) OpenGeoSys Community (opengeosys.org)
// SPDX-License-Identifier: BSD-3-Clause
 
#include "HTProcess.h"
 
#include <cassert>
 
#include "MonolithicHTFEM.h"
#include "NumLib/DOF/DOFTableUtil.h"
#include "NumLib/DOF/LocalToGlobalIndexMap.h"
#include "ProcessLib/CoupledSolutionsForStaggeredScheme.h"
#include "ProcessLib/SurfaceFlux/SurfaceFluxData.h"
#include "ProcessLib/Utils/CreateLocalAssemblers.h"
#include "StaggeredHTFEM.h"
 
namespace ProcessLib
{
namespace HT
{
HTProcess::HTProcess(
    std::string name,
    MeshLib::Mesh& mesh,
    std::unique_ptr<ProcessLib::AbstractJacobianAssembler>&& jacobian_assembler,
    std::vector<std::unique_ptr<ParameterLib::ParameterBase>> const& parameters,
    unsigned const integration_order,
    std::vector<std::vector<std::reference_wrapper<ProcessVariable>>>&&
        process_variables,
    HTProcessData&& process_data,
    SecondaryVariableCollection&& secondary_variables,
    bool const use_monolithic_scheme,
    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), use_monolithic_scheme),
      _process_data(std::move(process_data)),
      _surfaceflux(std::move(surfaceflux))
{
    this->_jacobian_assembler->checkPerturbationSize(2);
    if (_use_monolithic_scheme)
    {
        this->_jacobian_assembler->setNonDeformationComponentIDsNoSizeCheck(
            {0, 1} /* two variables: pressure and temperature */);
    }
}
 
void HTProcess::initializeConcreteProcess(
    NumLib::LocalToGlobalIndexMap const& dof_table,
    MeshLib::Mesh const& mesh,
    unsigned const integration_order)
{
    int const mesh_space_dimension = _process_data.mesh_space_dimension;
 
    if (_use_monolithic_scheme)
    {
        ProcessLib::createLocalAssemblers<MonolithicHTFEM>(
            mesh_space_dimension, mesh.getElements(), dof_table,
            _local_assemblers, NumLib::IntegrationOrder{integration_order},
            mesh.isAxiallySymmetric(), _process_data);
    }
    else
    {
        ProcessLib::createLocalAssemblers<StaggeredHTFEM>(
            mesh_space_dimension, mesh.getElements(), dof_table,
            _local_assemblers, NumLib::IntegrationOrder{integration_order},
            mesh.isAxiallySymmetric(), _process_data);
    }
 
    _secondary_variables.addSecondaryVariable(
        "darcy_velocity",
        makeExtrapolator(mesh_space_dimension, getExtrapolator(),
                         _local_assemblers,
                         &HTLocalAssemblerInterface::getIntPtDarcyVelocity));
}
 
void HTProcess::assembleConcreteProcess(
    const double t, double const dt, std::vector<GlobalVector*> const& x,
    std::vector<GlobalVector*> const& x_prev, int const process_id,
    GlobalMatrix& M, GlobalMatrix& K, GlobalVector& b)
{
    std::vector<NumLib::LocalToGlobalIndexMap const*> dof_tables;
    if (_use_monolithic_scheme)
    {
        DBUG("Assemble HTProcess.");
        dof_tables.emplace_back(_local_to_global_index_map.get());
    }
    else
    {
        if (process_id == _process_data.heat_transport_process_id)
        {
            DBUG(
                "Assemble the equations of heat transport process within "
                "HTProcess.");
        }
        else
        {
            DBUG(
                "Assemble the equations of single phase fully saturated "
                "fluid flow process within HTProcess.");
        }
        dof_tables.emplace_back(_local_to_global_index_map.get());
        dof_tables.emplace_back(_local_to_global_index_map.get());
 
        // For numerical Jacobian assembler
        // (only one variable per process in staggered scheme);
        this->_jacobian_assembler->setNonDeformationComponentIDsNoSizeCheck(
            {process_id});
    }
 
    // Call global assembler for each local assembly item.
    GlobalExecutor::executeSelectedMemberDereferenced(
        _global_assembler, &VectorMatrixAssembler::assemble, _local_assemblers,
        getActiveElementIDs(), dof_tables, t, dt, x, x_prev, process_id, &M, &K,
        &b);
}
 
void HTProcess::assembleWithJacobianConcreteProcess(
    const double t, double const dt, std::vector<GlobalVector*> const& x,
    std::vector<GlobalVector*> const& x_prev, int const process_id,
    GlobalVector& b, GlobalMatrix& Jac)
{
    DBUG("AssembleWithJacobian HTProcess.");
 
    std::vector<NumLib::LocalToGlobalIndexMap const*> dof_tables;
    if (!_use_monolithic_scheme)
    {
        dof_tables.emplace_back(_local_to_global_index_map.get());
    }
    else
    {
        dof_tables.emplace_back(_local_to_global_index_map.get());
        dof_tables.emplace_back(_local_to_global_index_map.get());
    }
 
    // Call global assembler for each local assembly item.
    GlobalExecutor::executeSelectedMemberDereferenced(
        _global_assembler, &VectorMatrixAssembler::assembleWithJacobian,
        _local_assemblers, getActiveElementIDs(), dof_tables, t, dt, x, x_prev,
        process_id, &b, &Jac);
}
 
std::tuple<NumLib::LocalToGlobalIndexMap*, bool>
HTProcess::getDOFTableForExtrapolatorData() const
{
    if (!_use_monolithic_scheme)
    {
        // For single-variable-single-component processes reuse the existing DOF
        // table.
        const bool manage_storage = false;
        return std::make_tuple(_local_to_global_index_map.get(),
                               manage_storage);
    }
 
    // Otherwise construct a new DOF table.
    std::vector<MeshLib::MeshSubset> all_mesh_subsets_single_component{
        *_mesh_subset_all_nodes};
 
    const bool manage_storage = true;
    return std::make_tuple(new NumLib::LocalToGlobalIndexMap(
                               std::move(all_mesh_subsets_single_component),
                               // by location order is needed for output
                               NumLib::ComponentOrder::BY_LOCATION),
                           manage_storage);
}
 
Eigen::Vector3d HTProcess::getFlux(std::size_t 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);
    std::vector<std::vector<GlobalIndexType>> indices_of_all_coupled_processes{
        x.size(), r_c_indices.rows};
    auto const local_x =
        getCoupledLocalSolutions(x, indices_of_all_coupled_processes);
 
    return _local_assemblers[element_id]->getFlux(p, t, local_x);
}
 
// this is almost a copy of the implementation in the GroundwaterFlow
void HTProcess::postTimestepConcreteProcess(
    std::vector<GlobalVector*> const& x,
    std::vector<GlobalVector*> const& /*x_prev*/,
    const double t,
    const double /*delta_t*/,
    int const process_id)
{
    // For the monolithic scheme, process_id is always zero.
    if (_use_monolithic_scheme && process_id != 0)
    {
        OGS_FATAL(
            "The condition of process_id = 0 must be satisfied for monolithic "
            "HTProcess, which is a single process.");
    }
    if (!_use_monolithic_scheme &&
        process_id != _process_data.hydraulic_process_id)
    {
        DBUG("This is the thermal part of the staggered HTProcess.");
        return;
    }
    if (!_surfaceflux)  // computing the surfaceflux is optional
    {
        return;
    }
 
    _surfaceflux->integrate(x, t, *this, process_id, _integration_order, _mesh,
                            getActiveElementIDs());
}
}  // namespace HT
}  // namespace ProcessLib