StokesFlowProcess.h
/**
* \file
* \copyright
* Copyright (c) 2012-2021, OpenGeoSys Community (http://www.opengeosys.org)
* Distributed under a Modified BSD License.
* See accompanying file LICENSE.txt or
* http://www.opengeosys.org/project/license
*
*/
#pragma once
#include "StokesFlowFEM.h"
#include "StokesFlowProcessData.h"
#include "ProcessLib/Process.h"
namespace ProcessLib
{
namespace StokesFlow
{
/// The Stokes equations are reduced from the Navier-Stokes equations,
/// and include momentum equations and a continuity equation describing
/// the flow in the free-flow region.
template <int GlobalDim>
class StokesFlowProcess final : public Process
{
public:
StokesFlowProcess(
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,
StokesFlowProcessData&& process_data,
SecondaryVariableCollection&& secondary_variables,
bool const use_monolithic_scheme);
bool isLinear() const override { return false; }
MathLib::MatrixSpecifications getMatrixSpecifications(
const int /*process_id*/) const override;
NumLib::LocalToGlobalIndexMap const& getDOFTable(
const int /*process_id*/) const override;
void computeSecondaryVariableConcrete(double const /*t*/,
double const /*dt*/,
std::vector<GlobalVector*> const& x,
GlobalVector const& /*x_dot*/,
int const /*process_id*/) override;
void postTimestepConcreteProcess(std::vector<GlobalVector*> const& x,
const double t,
const double dt,
int const process_id) override;
private:
void constructDofTable() override;
void initializeConcreteProcess(
NumLib::LocalToGlobalIndexMap const& dof_table,
MeshLib::Mesh const& mesh,
unsigned const integration_order) override;
void initializeBoundaryConditions() override;
void assembleConcreteProcess(const double t, double const dt,
std::vector<GlobalVector*> const& x,
std::vector<GlobalVector*> const& xdot,
int const process_id, GlobalMatrix& M,
GlobalMatrix& K, GlobalVector& b) override;
void assembleWithJacobianConcreteProcess(
const double t, double const dt, std::vector<GlobalVector*> const& x,
std::vector<GlobalVector*> const& xdot, const double dxdot_dx,
const double dx_dx, int const process_id, GlobalMatrix& M,
GlobalMatrix& K, GlobalVector& b, GlobalMatrix& Jac) override;
std::vector<MeshLib::Node*> _base_nodes;
std::unique_ptr<MeshLib::MeshSubset const> _mesh_subset_base_nodes;
StokesFlowProcessData _process_data;
std::vector<std::unique_ptr<StokesFlowLocalAssemblerInterface>>
_local_assemblers;
std::unique_ptr<NumLib::LocalToGlobalIndexMap>
_local_to_global_index_map_single_component;
/// Local to global index mapping for base nodes, which is used for linear
/// interpolation for pressure in the staggered scheme.
std::unique_ptr<NumLib::LocalToGlobalIndexMap>
_local_to_global_index_map_with_base_nodes;
};
extern template class StokesFlowProcess<2>;
} // namespace StokesFlow
} // namespace ProcessLib