opm-simulators/examples/problems/navierstokestestproblem.hh
Andreas Lauser f6c835298a rewrite the mechanism to enforce constraint degrees of freedom
- the residual now does not consider constraints anymore
- instead, the central place for constraints is the linearizer:
  - it gets a constraintsMap() method which is analogous to residual()
    but it stores (DOF index, constraints vector) pairs because
    typically only very few DOFs need to be constraint.
- the newton method consults the linearizer's constraint map to update
  the error and the current iterative solution. the primary variables
  for constraint degrees of freedom are now directly copied from the
  'Constraints' object to correctly handle pseudo primary variables.
- the abilility to specify partial constraints is removed, i.e., it is
  no longer possible to constrain some equations/primary variables of
  a degree of freedom without having to specify all of them. The
  reason is that is AFAICS with partial constraint DOFs it is
  impossible to specify the pseudo primary variables for models which
  require them (PVS, black-oil).

  because of this, the reference solution for the Navier-Stokes test
  is updated. the test still oscillates like hell, but fixing this
  would require to implement spatial discretizations that are either
  better in general (e.g., DG methods) or adapted to Navier-Stokes
  problems (e.g., staggered grid FV methods). since both of these are
  currently quite low on my list of priorities, let's just accept the
  osscillations for now.
2016-01-05 11:54:26 +01:00

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// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
/*
Copyright (C) 2012-2013 by Andreas Lauser
Copyright (C) 2012 by Klaus Mosthaf
This file is part of the Open Porous Media project (OPM).
OPM is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
OPM is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with OPM. If not, see <http://www.gnu.org/licenses/>.
*/
/*!
* \file
* \copydoc Ewoms::NavierStokesTestProblem
*/
#ifndef EWOMS_NAVIER_STOKES_TEST_PROBLEM_HH
#define EWOMS_NAVIER_STOKES_TEST_PROBLEM_HH
#include <ewoms/models/stokes/stokesmodel.hh>
#include <opm/material/fluidsystems/H2ON2FluidSystem.hpp>
#include <opm/material/fluidsystems/GasPhase.hpp>
#include <opm/material/components/N2.hpp>
#if HAVE_DUNE_ALUGRID
#include <dune/alugrid/grid.hh>
#include <dune/alugrid/dgf.hh>
#else
#include <dune/grid/alugrid/2d/alugrid.hh>
#include <dune/grid/io/file/dgfparser/dgfalu.hh>
#endif
#include <dune/common/version.hh>
#include <dune/common/fvector.hh>
namespace Ewoms {
template <class TypeTag>
class NavierStokesTestProblem;
}
namespace Ewoms {
namespace Properties {
NEW_TYPE_TAG(NavierStokesTestProblem, INHERITS_FROM(NavierStokesModel));
// Set the grid type
SET_TYPE_PROP(NavierStokesTestProblem, Grid, Dune::ALUGrid<2, 2, Dune::cube, Dune::nonconforming>);
// Set the property which defines the type of the physical problem
SET_TYPE_PROP(NavierStokesTestProblem, Problem,
Ewoms::NavierStokesTestProblem<TypeTag>);
SET_PROP(NavierStokesTestProblem, Fluid)
{
private:
typedef typename GET_PROP_TYPE(TypeTag, Scalar) Scalar;
public:
typedef Opm::GasPhase<Scalar, Opm::N2<Scalar> > type;
};
// Disable gravity
SET_BOOL_PROP(NavierStokesTestProblem, EnableGravity, false);
// Enable constraints
SET_BOOL_PROP(NavierStokesTestProblem, EnableConstraints, true);
// Default simulation end time [s]
SET_SCALAR_PROP(NavierStokesTestProblem, EndTime, 1e-3);
// Default initial time step size [s]
SET_SCALAR_PROP(NavierStokesTestProblem, InitialTimeStepSize, 1e-3);
// Default grid file to load
SET_STRING_PROP(NavierStokesTestProblem, GridFile,
"data/test_navierstokes.dgf");
}
}
namespace Ewoms {
/*!
* \ingroup StokesModel
* \ingroup TestProblems
* \brief Stokes flow problem with modified nitrogen (N2) circulating in
* a cavity. (lid-driven cavity-flow)
*
* The example is taken from Ghia, Ghia, and Shin (1982), "High-Re solutions
* for incompressible flow using the Navier-Stokes equations and a multigrid
* method", Journal of Computational Physics, Vol. 48, pp. 387-411.
*
* The domain is two-dimensional and sized 1m times 1m. The boundary
* conditions for the momentum balances are no-flow boundary
* conditions except for the top, which is floating from left to right
* with 1 m/s. The mass balance features outflow boundary
* conditions. All vertices at the bottom, left and right boundaries
* are constraint to a constant pressure level and zero velocity.
*/
template <class TypeTag>
class NavierStokesTestProblem : public StokesProblem<TypeTag>
{
typedef StokesProblem<TypeTag> ParentType;
typedef typename GET_PROP_TYPE(TypeTag, Scalar) Scalar;
typedef typename GET_PROP_TYPE(TypeTag, GridView) GridView;
typedef typename GET_PROP_TYPE(TypeTag, Simulator) Simulator;
typedef typename GET_PROP_TYPE(TypeTag, PrimaryVariables) PrimaryVariables;
typedef typename GET_PROP_TYPE(TypeTag, EqVector) EqVector;
typedef typename GET_PROP_TYPE(TypeTag, RateVector) RateVector;
typedef typename GET_PROP_TYPE(TypeTag, BoundaryRateVector) BoundaryRateVector;
typedef typename GET_PROP_TYPE(TypeTag, Constraints) Constraints;
typedef typename GET_PROP_TYPE(TypeTag, Indices) Indices;
enum {
// Number of equations and grid dimension
dimWorld = GridView::dimensionworld,
// copy some indices for convenience
pressureIdx = Indices::pressureIdx,
velocity0Idx = Indices::velocity0Idx,
conti0EqIdx = Indices::conti0EqIdx,
momentum0EqIdx = Indices::momentum0EqIdx
};
typedef typename GridView::ctype CoordScalar;
typedef Dune::FieldVector<CoordScalar, dimWorld> GlobalPosition;
public:
/*!
* \copydoc Doxygen::defaultProblemConstructor
*/
NavierStokesTestProblem(Simulator &simulator)
: ParentType(simulator)
{ eps_ = 1e-6; }
/*!
* \name Problem parameters
*/
//! \{
/*!
* \copydoc FvBaseProblem::name
*/
std::string name() const
{ return "navierstokes"; }
/*!
* \copydoc FvBaseProblem::endTimeStep
*/
void endTimeStep()
{
#ifndef NDEBUG
// checkConservativeness() does not include the effect of constraints, so we
// disable it for this problem...
//this->model().checkConservativeness();
// Calculate storage terms
EqVector storage;
this->model().globalStorage(storage);
// Write mass balance information for rank 0
if (this->gridView().comm().rank() == 0) {
std::cout << "Storage: " << storage << std::endl << std::flush;
}
#endif // NDEBUG
}
/*!
* \brief StokesProblem::temperature
*
* This problem assumes a constant temperature of 10 degrees Celsius.
*/
template <class Context>
Scalar temperature(const Context &context, unsigned spaceIdx, unsigned timeIdx) const
{ return 273.15 + 10; }
//! \}
/*!
* \name Boundary conditions
*/
//! \{
/*!
* \copydoc FvBaseProblem::boundary
*/
template <class Context>
void boundary(BoundaryRateVector &values, const Context &context,
unsigned spaceIdx, unsigned timeIdx) const
{
/* const GlobalPosition &pos = context.pos(spaceIdx, timeIdx);
values.setOutflow(massBalanceIdx);
values.setDirichlet(momentumXIdx);
values.setDirichlet(momentumYIdx);
// set pressure for all vertices at the bottom
if (onLowerBoundary_(pos)) {
values.setDirichlet(massBalanceIdx);
}
*/
values.setNoFlow(context, spaceIdx, timeIdx);
}
//! \}
/*!
* \name Volumetric terms
*/
//! \{
/*!
* \copydoc FvBaseProblem::initial
*/
template <class Context>
void initial(PrimaryVariables &values, const Context &context, unsigned spaceIdx,
unsigned timeIdx) const
{ initial_(values); }
/*!
* \copydoc FvBaseProblem::constraints
*
* For this problem, we fix the velocity of upper boundary.
*/
template <class Context>
void constraints(Constraints &constraints, const Context &context,
unsigned spaceIdx, unsigned timeIdx) const
{
const auto &pos = context.pos(spaceIdx, timeIdx);
if (onUpperBoundary_(pos)) {
constraints.setActive(true);
// lid moves from left to right
const Scalar lidVelocity = 1.0;
constraints[velocity0Idx + 0] = lidVelocity;
constraints[velocity0Idx + 1] = 0.0;
constraints[pressureIdx + 1] = 1e5;
}
}
/*!
* \copydoc FvBaseProblem::source
*/
template <class Context>
void source(RateVector &rate, const Context &context, unsigned spaceIdx,
unsigned timeIdx) const
{ rate = Scalar(0.0); }
//! \}
private:
// internal method for the initial condition
void initial_(PrimaryVariables &priVars) const
{
priVars[pressureIdx] = 1e5;
priVars[velocity0Idx + 0] = 0.0;
priVars[velocity0Idx + 1] = 0.0;
}
bool onLeftBoundary_(const GlobalPosition &globalPos) const
{ return globalPos[0] < this->boundingBoxMin()[0] + eps_; }
bool onRightBoundary_(const GlobalPosition &globalPos) const
{ return globalPos[0] > this->boundingBoxMax()[0] - eps_; }
bool onLowerBoundary_(const GlobalPosition &globalPos) const
{ return globalPos[1] < this->boundingBoxMin()[1] + eps_; }
bool onUpperBoundary_(const GlobalPosition &globalPos) const
{ return globalPos[1] > this->boundingBoxMax()[1] - eps_; }
Scalar eps_;
};
} // namespace Ewoms
#endif