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
|
/*
* Copyright (C) 2015 Marie-Luise Maier, Mathias J. Krause, Sascha Janz
* 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.
*/
/** Alberto Di Renzo, Francesco Paolo Di Maio:
* "Comparison of contact-force models for the simulation of collisions in
* DEM-based granular ow codes",
* Chemical Engineering Science 59 (2004) 525 - 541
*
* validation paper for contact:
* H. Kruggel-Emden, E. Simsek, S. Rickelt, S. Wirtz, V. Scherer: Review and
* extension of normal force models for the Discrete Element Method, Powder
* Technology 171 (2007) 157-173
*/
#ifndef LinearContactForce3D_H
#define LinearContactForce3D_H
#include <cmath>
#include "functors/lattice/superLatticeLocalF3D.h"
#include "particles/particleSystem3D.h"
#include "force3D.h"
namespace olb {
template<typename T, template<typename U> class PARTICLETYPE>
class ParticleSystem3D;
template<typename T, template<typename U> class PARTICLETYPE, template<
typename W> class DESCRIPTOR>
class LinearContactForce3D: public Force3D<T, PARTICLETYPE> {
public:
LinearContactForce3D(T G1, T G2, T v1, T v2, T scale1 = T(1.), T scale2 = T(1.),
bool validationKruggelEmden = false);
~LinearContactForce3D() override {};
void applyForce(typename std::deque<PARTICLETYPE<T> >::iterator p, int pInt,
ParticleSystem3D<T, PARTICLETYPE> &pSys) override;
void computeForce(typename std::deque<PARTICLETYPE<T> >::iterator p, int pInt,
ParticleSystem3D<T, PARTICLETYPE>& pSys, T force[3]);
private:
T _G1; // Shear modulus (PA)
T _G2; // Shear modulus (PA)
T _v1; // poisson ratio
T _v2; // poisson ratio
T _scale1; // scales normal value of force
T _scale2; // scales tangential value of force
T E1, E2; // E-Modul Particle
T eE; // equivalent combined E-Modul
T eG; // equivalent combined E-Modul
// constant eta_n from paper H. Kruggel-Endem, Powder Technology 171 (2007) 157-173,
// Table 3 / brass particle
bool _validationKruggelEmden; // use values of paper
};
}
#endif
|
