/usr/include/liggghts/sph_kernel_spiky.h is in libliggghts-dev 3.7.0+repack1-1.
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 | /* ----------------------------------------------------------------------
This is the
██╗ ██╗ ██████╗ ██████╗ ██████╗ ██╗ ██╗████████╗███████╗
██║ ██║██╔════╝ ██╔════╝ ██╔════╝ ██║ ██║╚══██╔══╝██╔════╝
██║ ██║██║ ███╗██║ ███╗██║ ███╗███████║ ██║ ███████╗
██║ ██║██║ ██║██║ ██║██║ ██║██╔══██║ ██║ ╚════██║
███████╗██║╚██████╔╝╚██████╔╝╚██████╔╝██║ ██║ ██║ ███████║
╚══════╝╚═╝ ╚═════╝ ╚═════╝ ╚═════╝ ╚═╝ ╚═╝ ╚═╝ ╚══════╝®
DEM simulation engine, released by
DCS Computing Gmbh, Linz, Austria
http://www.dcs-computing.com, office@dcs-computing.com
LIGGGHTS® is part of CFDEM®project:
http://www.liggghts.com | http://www.cfdem.com
Core developer and main author:
Christoph Kloss, christoph.kloss@dcs-computing.com
LIGGGHTS® is open-source, distributed under the terms of the GNU Public
License, version 2 or later. It 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. You should have
received a copy of the GNU General Public License along with LIGGGHTS®.
If not, see http://www.gnu.org/licenses . See also top-level README
and LICENSE files.
LIGGGHTS® and CFDEM® are registered trade marks of DCS Computing GmbH,
the producer of the LIGGGHTS® software and the CFDEM®coupling software
See http://www.cfdem.com/terms-trademark-policy for details.
-------------------------------------------------------------------------
Contributing author and copyright for this file:
Andreas Aigner (JKU Linz))
Copyright 2009-2012 JKU Linz
------------------------------------------------------------------------- */
#ifdef SPH_KERNEL_CLASS
// kernel identifier (a unique integer >= 0)
// a name for the kernel
// name of the functions for the kernel, its derivative, and the cutoff are defined
SPHKernel
(
4,
spiky,
sph_kernel_spiky,
sph_kernel_spiky_der,
sph_kernel_spiky_cut
)
#else
#ifndef LMP_SPH_KERNEL_SPIKY
#define LMP_SPH_KERNEL_SPIKY
namespace SPH_KERNEL_NS {
inline double sph_kernel_spiky(double s, double h, double hinv);
inline double sph_kernel_spiky_der(double s, double h, double hinv);
inline double sph_kernel_spiky_cut();
}
/* ----------------------------------------------------------------------
Cubic spline SPH kernel
h is kernel parameter
s is distance normalized by h
4.7746 is 15 over pi
0.07460388 is 15 over 64*pi
------------------------------------------------------------------------- */
inline double SPH_KERNEL_NS::sph_kernel_spiky(double s, double, double hinv)
{
if (s < 2.)
{
return (0.07460388*hinv*hinv*hinv * (2.-s)*(2.-s)*(2.-s));
}
else
{
return 0;
}
/*
if (s < 1.)
{
return (4.7746*hinv*hinv*hinv * (1.-s)*(1.-s)*(1.-s));
}
else
{
return 0;
}
*/
}
/* ----------------------------------------------------------------------
Derivative of cubic spline SPH kernel
is equal to grad W if multiplied with radial unit vector
h is kernel parameter
s is distance normalized by h
14.323944876 is 45 over pi
0.223811639 is 45 over 64*pi
------------------------------------------------------------------------- */
inline double SPH_KERNEL_NS::sph_kernel_spiky_der(double s, double, double hinv)
{
if (s < 2.)
{
return (-0.223811639*hinv*hinv*hinv*hinv * (2.-s)*(2.-s));
}
else
{
return 0;
}
/*
if (s < 1.)
{
return (-14.324*hinv*hinv*hinv*hinv * (1.-s)*(1.-s));
}
else
{
return 0;
}
*/
}
/* ----------------------------------------------------------------------
Definition of cubic spline SPH kernel cutoff in terms of s
s is normalized distance
------------------------------------------------------------------------- */
inline double SPH_KERNEL_NS::sph_kernel_spiky_cut()
{
return 2.;
/*
return 1.;
*/
}
#endif
#endif
|