WeakPressureExtrapolate.cpp

Go to the documentation of this file.

///////////////////////////////////////////////////////////////////////////////
//
// File: WeakPressureExtrapolate.cpp
//
// For more information, please see: http://www.nektar.info
//
// The MIT License
//
// Copyright (c) 2006 Division of Applied Mathematics, Brown University (USA),
// Department of Aeronautics, Imperial College London (UK), and Scientific
// Computing and Imaging Institute, University of Utah (USA).
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
// Description: Abstract base class for WeakPressureExtrapolate.
//
///////////////////////////////////////////////////////////////////////////////
 
#include <IncNavierStokesSolver/EquationSystems/WeakPressureExtrapolate.h>
#include <LibUtilities/Communication/Comm.h>
 
namespace Nektar
{
/**
 * Registers the class with the Factory.
 */
std::string WeakPressureExtrapolate::className =
    GetExtrapolateFactory().RegisterCreatorFunction(
        "WeakPressure", WeakPressureExtrapolate::create, "WeakPressure");
 
WeakPressureExtrapolate::WeakPressureExtrapolate(
    const LibUtilities::SessionReaderSharedPtr pSession,
    Array<OneD, MultiRegions::ExpListSharedPtr> pFields,
    MultiRegions::ExpListSharedPtr pPressure, const Array<OneD, int> pVel,
    const SolverUtils::AdvectionSharedPtr advObject)
    : StandardExtrapolate(pSession, pFields, pPressure, pVel, advObject)
{
}
 
WeakPressureExtrapolate::~WeakPressureExtrapolate()
{
}
 
/**
 * Function to extrapolate the new pressure boundary condition.
 * Based on the velocity field and on the advection term.
 * Acceleration term is also computed.  This routine is a general
 * one for 2d and 3D application and it can be called directly
 * from velocity correction scheme. Specialisation on
 * dimensionality is redirected to the CalcNeumannPressureBCs
 * method.
 */
void WeakPressureExtrapolate::v_EvaluatePressureBCs(
    const Array<OneD, const Array<OneD, NekDouble>> &fields,
    const Array<OneD, const Array<OneD, NekDouble>> &N, NekDouble kinvis)
{
    m_pressureCalls++;
    if (m_HBCnumber > 0)
    {
        // Calculate just viscous BCs at current level and put in
        // m_pressureHBCs[nlevels-1]
        CalcNeumannPressureBCs(fields, N, kinvis);
 
        // Extrapolate to m_pressureHBCs to n+1
        ExtrapolateArray(m_pressureHBCs);
 
        // \int_bnd q  n.u^{n} ds update current normal of field
        // add m_pressureHBCs to gamma_0/Dt * m_acceleration[0]
        AddVelBC();
 
        // Copy m_pressureHBCs to m_PbndExp
        CopyPressureHBCsToPbndExp();
    }
 
    // Evaluate High order outflow conditions if required.
    CalcOutflowBCs(fields, kinvis);
}
 
// In weak pressure formulation we also require \int q u.n ds on
// outflow boundary
void WeakPressureExtrapolate::v_AddNormVelOnOBC(
    const int noutflow, const int nreg, Array<OneD, Array<OneD, NekDouble>> &u)
{
    boost::ignore_unused(noutflow);
 
    if (!m_houtflow.get()) // no outflow on partition so just return
    {
        return;
    }
 
    int nbcoeffs = m_PBndExp[nreg]->GetNcoeffs();
    // int nqb      = m_PBndExp[nreg]->GetTotPoints();
 
    Array<OneD, NekDouble> IProdVnTmp(nbcoeffs);
 
#if 0
        Array<OneD, Array<OneD, NekDouble> > ubnd(m_curl_dim);
 
        for(int i = 0; i < m_curl_dim; ++i)
        {
            EvaluateBDFArray(m_houtflow->m_outflowVelBnd[noutflow][i]);
 
            ubnd[i] = m_houtflow->m_outflowVelBnd[noutflow][i][m_intSteps-1];
 
            // point input u to the first part of the array for later uee.
            // u[i] = m_houtflow->m_outflowVelBnd[noutflow][i][0];
            u[i] = ubnd[i];
        }
 
        m_PBndExp[nreg]->NormVectorIProductWRTBase(ubnd,IProdVnTmp);
#endif
    m_PBndExp[nreg]->NormVectorIProductWRTBase(u, IProdVnTmp);
 
    Vmath::Svtvp(nbcoeffs, -1.0 / m_timestep, IProdVnTmp, 1,
                 m_PBndExp[nreg]->UpdateCoeffs(), 1,
                 m_PBndExp[nreg]->UpdateCoeffs(), 1);
}
 
/**
 *  vritual function which only puts in the curl operator into the bcs
 */
void WeakPressureExtrapolate::v_MountHOPBCs(
    int HBCdata, NekDouble kinvis, Array<OneD, NekDouble> &Q,
    Array<OneD, const NekDouble> &Advection)
{
    boost::ignore_unused(Advection);
 
    Vmath::Smul(HBCdata, -kinvis, Q, 1, Q, 1);
}
 
} // namespace Nektar