ReducedSteadyNS.H

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/*---------------------------------------------------------------------------*\
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 * In real Time Highly Advanced Computational Applications for Finite Volumes
 * Copyright (C) 2017 by the ITHACA-FV authors
-------------------------------------------------------------------------------
License
    This file is part of ITHACA-FV
    ITHACA-FV is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
    ITHACA-FV 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 Lesser General Public License for more details.
    You should have received a copy of the GNU Lesser General Public License
    along with ITHACA-FV. If not, see <http://www.gnu.org/licenses/>.
Class
    reducedSteadyNS
Description
    A reduced problem for the stationary NS equations
SourceFiles
    reducedSteadyNS.C
\*---------------------------------------------------------------------------*/

 
#ifndef ReducedSteadyNS_H
#define ReducedSteadyNS_H
 
#include "fvCFD.H"
#include "IOmanip.H"
#include "ReducedProblem.H"
#include "steadyNS.H"
#include "ITHACAutilities.H"
#include "EigenFunctions.H"
#include <Eigen/Eigen>
#include <unsupported/Eigen/NonLinearOptimization>
#include <unsupported/Eigen/NumericalDiff>

struct newton_steadyNS: public newton_argument<double>
{
    public:
        newton_steadyNS() {}
 
        newton_steadyNS(int Nx, int Ny,
                        steadyNS& problem): newton_argument<double>(Nx,
                                    Ny),
            problem(& problem),
            Nphi_u(problem.NUmodes + problem.liftfield.size() + problem.NSUPmodes),
            Nphi_p(problem.NPmodes),
            N_BC(problem.inletIndex.rows())
        {}
 
        int operator()(const Eigen::VectorXd& x, Eigen::VectorXd& fvec) const;
        int df(const Eigen::VectorXd& x,  Eigen::MatrixXd& fjac) const;
 
        steadyNS* problem;
        int Nphi_u;
        int Nphi_p;
        int N_BC;
        scalar nu;
        Eigen::MatrixXd tauU;
        Eigen::VectorXd BC;
};
 
 
/*---------------------------------------------------------------------------*\
                        Class reducedProblem Declaration
\*---------------------------------------------------------------------------*/


class reducedSteadyNS: public reducedProblem
{
    private:
 
    public:
        // Constructors
        reducedSteadyNS();

        explicit reducedSteadyNS(steadyNS& problem);
 
        ~reducedSteadyNS() {};

        ITHACAparameters* para;

        Eigen::MatrixXd vel_now;

        Eigen::MatrixXd fTau;

        Eigen::MatrixXd fN;

        Eigen::VectorXd y_old;

        Eigen::VectorXd y;

        scalar nu;

        List < Eigen::MatrixXd> online_solution;

        PtrList<volVectorField> Umodes;

        PtrList<volScalarField> Pmodes;

        PtrList<volVectorField> Usnapshots;

        PtrList<volScalarField> Psnapshots;

        PtrList<volScalarField> PREC;

        PtrList<volVectorField> UREC;

        PtrList<volScalarField> pRecFields;

        PtrList<volVectorField> uRecFields;

        newton_steadyNS newton_object;

        steadyNS* problem;

        int Nphi_u;

        int Nphi_p;

        int Nphi_sup;

        int N_BC;

        int count_online_solve = 1;

        Eigen::MatrixXd tauU;
 
        // Functions

        void solveOnline_PPE(Eigen::MatrixXd vel_now);

        void solveOnline_sup(Eigen::MatrixXd vel_now);

        void reconstruct_PPE(fileName folder = "./ITHACAoutput/online_rec",
                             int printevery = 1);
 

        void reconstruct(bool exportFields = false,
                         fileName folder = "./ITHACAoutput/online_rec",
                         int printevery = 1);

        void reconstructLiftAndDrag(steadyNS& problem, fileName folder);

        double inf_sup_constant();

        Eigen::MatrixXd setOnlineVelocity(Eigen::MatrixXd vel);
 
};
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 
 
#endif