This file is indexed.

/usr/include/palabos/latticeBoltzmann/mrtLattices.h is in libplb-dev 1.5~r1+repack1-3.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
/* This file is part of the Palabos library.
 *
 * Copyright (C) 2011-2015 FlowKit Sarl
 * Route d'Oron 2
 * 1010 Lausanne, Switzerland
 * E-mail contact: contact@flowkit.com
 *
 * The most recent release of Palabos can be downloaded at 
 * <http://www.palabos.org/>
 *
 * The library Palabos is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * The library 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

/* Orestis Malaspinas contributed this code.
 */

/** \file
 * Descriptor for all types of 2D and 3D lattices. In principle, thanks
 * to the fact that the Palabos code is generic, it is sufficient to
 * write a new descriptor when a new type of lattice is to be used.
 *  -- header file
 */
#ifndef MRT_LATTICES_H
#define MRT_LATTICES_H

#include "core/globalDefs.h"
#include "latticeBoltzmann/nearestNeighborLattices2D.h"
#include "latticeBoltzmann/nearestNeighborLattices3D.h"
#include "latticeBoltzmann/externalFields.h"
#include "multiPhysics/shanChenLattices2D.h"
#include "multiPhysics/shanChenLattices3D.h"
#include <vector>

namespace plb {

/// Descriptors for the 2D and 3D lattices.
/** \warning Attention: The lattice directions must always be ordered in
 * such a way that c[i] = -c[i+(q-1)/2] for i=1..(q-1)/2, and c[0] = 0 must
 * be the rest velocity. Furthermore, the velocities c[i] for i=1..(q-1)/2
 * must verify
 *  - in 2D: (c[i][0]<0) || (c[i][0]==0 && c[i][1]<0)
 *  - in 3D: (c[i][0]<0) || (c[i][0]==0 && c[i][1]<0)
 *                       || (c[i][0]==0 && c[i][1]==0 && c[i][2]<0)
 * Otherwise some of the code will work erroneously, because the
 * aformentioned relations are taken as given to enable a few
 * optimizations.
*/
namespace descriptors {

    /// MRT D2Q9 lattice. The numbering follows the one in "Viscous flow computations
    /// with the method of lattice Boltzmann equation", D. Yu, L.-S. Luo, W. Shi,
    /// Progress in Aerospace Sciences 39, (2003), p. 329-367
    template <typename T>
    struct MRTD2Q9DescriptorBase : public D2Q9DescriptorBase<T>
    {
        typedef D2Q9DescriptorBase<T> BaseDescriptor;
        typedef MRTD2Q9DescriptorBase<T> SecondBaseDescriptor;
        enum { numPop=BaseDescriptor::q };
        
        static const T M[BaseDescriptor::q][BaseDescriptor::q];    // Matrix of base change between f and moments : moments=M.f
        static const T invM[BaseDescriptor::q][BaseDescriptor::q]; // inverse of base change matrix : f=invM.moments
        static const T S[BaseDescriptor::q];       // relaxation times
        enum {jIndexes = 2};
        static const int momentumIndexes[jIndexes]; // relevant indexes of r. t. for shear viscosity
        enum {shearIndexes = 2};
        static const int shearViscIndexes[shearIndexes]; // relevant indexes of r. t. for shear viscosity
        enum {qIndexes = 2};
        static const int qViscIndexes[qIndexes]; // relevant indexes of r. t. for q
        static const int bulkViscIndex  = 1; // relevant index of r. t. for bulk viscosity
        static const int epsilonIndex   = 2; // relevant index of r. t. for epsilon 
    };
    
    /// MRT D3Q19 lattice. The numbering follows the one in "Multiple-relaxation-
    /// time lattice Boltzmann models in three dimensions", D. D'Humières, 
    /// I. Ginzburg, M. Krafzcyk, P. Lallemand, L.-S. Luo,
    /// Phil. Trans. R. Soc. Lond. A (2002) 660, p. 437-451
    template <typename T>
    struct MRTD3Q19DescriptorBase : public D3Q19DescriptorBase<T>
    {
        typedef D3Q19DescriptorBase<T> BaseDescriptor;
        typedef MRTD3Q19DescriptorBase<T> SecondBaseDescriptor;
        enum { numPop=BaseDescriptor::q };
        
        static const T M[BaseDescriptor::q][BaseDescriptor::q];    // Matrix of base change between f and moments : moments=M.f
        static const T invM[BaseDescriptor::q][BaseDescriptor::q]; // inverse of base change matrix : f=invM.moments
        static const T S[BaseDescriptor::q];       // relaxation times
        enum {jIndexes = 3};
        static const int momentumIndexes[jIndexes]; // relevant indexes of r. t. for shear viscosity
        enum {shearIndexes = 5};
        static const int shearViscIndexes[shearIndexes]; // relevant indexes of r. t. for shear viscosity
        static const int bulkViscIndex  = 1; // relevant index of r. t. for bulk viscosity
        enum {qIndexes = 3};
        static const int qViscIndexes[qIndexes]; // relevant indexes of r. t. for q indices (s4,s6,s8 of the paper)
        static const int epsilonIndex   = 2; // relevant index of r. t. for epsilon (s2 in the original paper)
    };

    template <typename T>
    struct MRTD2Q9Descriptor
        : public MRTD2Q9DescriptorBase<T>, public NoExternalFieldBase
    {
        static const char name[];
    };
    
    template <typename T>
    struct ForcedMRTD2Q9Descriptor
        : public MRTD2Q9DescriptorBase<T>, public Force2dDescriptorBase
    {
        static const char name[];
    };
    
    template <typename T>
    struct ExternalVelocityMRTD2Q9Descriptor
        : public MRTD2Q9DescriptorBase<T>, public Velocity2dDescriptorBase
    {
        static const char name[];
    };
    
    template <typename T>
    struct ForcedMRTShanChenD2Q9Descriptor
        : public MRTD2Q9DescriptorBase<T>, public ForcedShanChenExternalBase2D
    {
        static const char name[];
    };
    

    template <typename T>
    struct MRTD3Q19Descriptor
        : public MRTD3Q19DescriptorBase<T>, public NoExternalFieldBase
    {
        static const char name[];
    };
    
    template <typename T>
    struct ForcedMRTD3Q19Descriptor
    : public MRTD3Q19DescriptorBase<T>, public Force3dDescriptorBase
    {
        static const char name[];
    };
    
    
    template <typename T>
    struct ForcedMRTShanChenD3Q19Descriptor
        : public MRTD3Q19DescriptorBase<T>, public ForcedShanChenExternalBase3D
    {
        static const char name[];
    };
    
    template <typename T>
    struct ExternalVelocityMRTD3Q19Descriptor
        : public MRTD3Q19DescriptorBase<T>, public Velocity3dBase
    {
        static const char name[];
    };

    template <typename T>
    struct AbsorbingWaveMRTD3Q19Descriptor
        : public MRTD3Q19DescriptorBase<T>, public AbsorbingWaveExternalField3dBase
    {
        static const char name[];
    };


}  // namespace descriptors

}  // namespace plb

#endif