fringe2D.h

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/*  This file is part of the OpenLB library
 *
 *  Copyright (C) 2015 Mathias J. Krause
 *  E-mail contact: info@openlb.net
 *  The most recent release of OpenLB can be downloaded at
 *  <http://www.openlb.net/>
 *
 *  This program 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.
 *
 *  This program 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 this program; if not, write to the Free
 *  Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 *  Boston, MA  02110-1301, USA.
*/
 
#ifndef FRINGE_2D_H
#define FRINGE_2D_H
 
#include<vector>    // for generic i/o
#include<cmath>     // for lpnorm
 
#include "analyticalF.h"
#include "io/ostreamManager.h"
 
namespace olb {
 
template <typename T, typename S>
class Fringe2D : public AnalyticalF2D<T,S> {
 
private:
  AnalyticalF2D<T,S>& _wantedVelocity;
  T _start;
  T _end;
  int _direction;
  T _lambdaMax;
  T _rise;
  T _fall;
 
public:
  Fringe2D(AnalyticalF2D<T,S>& wantedVelocity, T start, T end, int direction, T lambdaMax=.005, T rise=.4, T fall=.2);
 
  bool operator()(T output[6], const S input[2]);
 
private:
  T s(const T& x) const;
  T lambda(const T& x) const;
};
 
} // end namespace olb
 
#endif