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/* This file is part of the OpenLB library
*
* Copyright (C) 2018 Adrian Kummerlaender
* 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 SUPER_LATTICE_REFINEMENT_METRIC_F_2D_H
#define SUPER_LATTICE_REFINEMENT_METRIC_F_2D_H
#include "superBaseF2D.h"
#include "core/superLattice2D.h"
namespace olb {
/// SuperLatticeKnudsen2D measures cell-local ratio between non-equilibrium and equilibrium distribution
/**
* This value approximates the dimensionless Knudsen number in sufficiently well-resolved grids.
*
* As such it may be used to infer information on the quality of the simulation.
*
* See SuperLatticeRefinementMetricKnudsen2D.
**/
template <typename T, typename DESCRIPTOR>
class SuperLatticeKnudsen2D final : public SuperLatticeF2D<T, DESCRIPTOR> {
public:
SuperLatticeKnudsen2D(SuperLattice2D<T, DESCRIPTOR>& lattice);
bool operator() (T output[], const int input[]) override;
};
/// SuperLatticeRefinementMetricKnudsen2D suggests a per-block grid refinement factor
/**
* This functor is a direct implementation of the refinement criterion described in
* "Automatic grid refinement criterion for lattice Boltzmann method" [arXiv:1507.06767]
* by D. Lagrava et al.
**/
template <typename T, typename DESCRIPTOR>
class SuperLatticeRefinementMetricKnudsen2D final : public SuperLatticeF2D<T, DESCRIPTOR> {
public:
/// Constructor
/**
* \param converter Required to get the theoretical Knudsen number as reference
**/
SuperLatticeRefinementMetricKnudsen2D(
SuperLattice2D<T, DESCRIPTOR>& lattice,
const UnitConverter<T, DESCRIPTOR>& converter);
/**
* \param output
* output[0] == 0 suggests sufficient grid resolution,
* output[0] > 0 suggests the grid to be refined output[0] times
* \param glob
* cuboid to be considered
**/
bool operator() (T output[], int glob);
/**
* \param output
* output[0] == 0 suggests sufficient grid resolution,
* output[0] > 0 suggests the grid to be refined output[0] times
* \input input
* grid cell to be considered
**/
bool operator() (T output[], const int input[]) override;
/// Convenience method for printing per-block refinement factors
void print();
};
}
#endif
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