SteadyAdvectionDiffusion.cpp

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/////////////////////////////////////////////////////////////////////////////////
//
// File SteadAdvectionDiffusion.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
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// Description: Steady advection-diffusion solve routines
//
///////////////////////////////////////////////////////////////////////////////
#include <ADRSolver/EquationSystems/SteadyAdvectionDiffusion.h>
 
using namespace std;
 
namespace Nektar
{
    string SteadyAdvectionDiffusion::className = GetEquationSystemFactory().RegisterCreatorFunction("SteadyAdvectionDiffusion", SteadyAdvectionDiffusion::create);
 
    /**
     * @class SteadyAdvectionDiffusion
     * This is a solver class for solving the  problems.
     * - SteadyAdvectionDiffusion:
     *   \f$ c \cdot \nabla u -\nabla \cdot (\nabla u)  = f(x)\f$
     */
 
    SteadyAdvectionDiffusion::SteadyAdvectionDiffusion(
        const LibUtilities::SessionReaderSharedPtr& pSession,
        const SpatialDomains::MeshGraphSharedPtr& pGraph)
        : EquationSystem(pSession, pGraph),
          m_lambda(0.0)
    {
    }
 
    void SteadyAdvectionDiffusion::v_InitObject()
    {
        EquationSystem::v_InitObject();
 
        std::vector<std::string> vel;
        vel.push_back("Vx");
        vel.push_back("Vy");
        vel.push_back("Vz");
 
        // Resize the advection velocities vector to dimension of the problem
        vel.resize(m_spacedim);
 
        // Store in the global variable m_velocity the advection velocities
        m_velocity = Array<OneD, Array<OneD, NekDouble> >(m_spacedim);
        GetFunction( "BaseFlow")->Evaluate(vel,  m_velocity);
    }
 
    SteadyAdvectionDiffusion::~SteadyAdvectionDiffusion()
    {
 
    }
 
    void SteadyAdvectionDiffusion::v_GenerateSummary(SolverUtils::SummaryList& s)
    {
        SolverUtils::AddSummaryItem(s, "Lambda", m_lambda);
    }
 
 
    void SteadyAdvectionDiffusion::v_DoInitialise()
    {
        // set initial forcing from session file
        GetFunction("Forcing")->Evaluate(m_session->GetVariables(), m_fields);
    }
 
    void SteadyAdvectionDiffusion::v_DoSolve()
    {
        for(int i = 0; i < m_fields.size(); ++i)
        {
        // Zero initial guess
            Vmath::Zero(m_fields[i]->GetNcoeffs(),m_fields[i]->UpdateCoeffs(),1);
            m_fields[i]->LinearAdvectionDiffusionReactionSolve(m_velocity,
                                                               m_fields[i]->GetPhys(),
                                                               m_fields[i]->UpdateCoeffs(),
                                                               m_lambda);
            m_fields[i]->SetPhysState(false);
        }
    }
 
}