Page Menu
Home
c4science
Search
Configure Global Search
Log In
Files
F80874980
fix_enforce2d.cpp
No One
Temporary
Actions
Download File
Edit File
Delete File
View Transforms
Subscribe
Mute Notifications
Award Token
Subscribers
None
File Metadata
Details
File Info
Storage
Attached
Created
Tue, Sep 3, 00:58
Size
2 KB
Mime Type
text/x-c
Expires
Thu, Sep 5, 00:58 (2 d)
Engine
blob
Format
Raw Data
Handle
20469481
Attached To
rLAMMPS lammps
fix_enforce2d.cpp
View Options
/* ----------------------------------------------------------------------
LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
http://lammps.sandia.gov, Sandia National Laboratories
Steve Plimpton, sjplimp@sandia.gov
Copyright (2003) Sandia Corporation. Under the terms of Contract
DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
certain rights in this software. This software is distributed under
the GNU General Public License.
See the README file in the top-level LAMMPS directory.
------------------------------------------------------------------------- */
#include "string.h"
#include "fix_enforce2d.h"
#include "atom.h"
#include "update.h"
#include "respa.h"
#include "error.h"
using namespace LAMMPS_NS;
/* ---------------------------------------------------------------------- */
FixEnforce2D::FixEnforce2D(LAMMPS *lmp, int narg, char **arg) :
Fix(lmp, narg, arg)
{
if (narg != 3) error->all("Illegal fix enforce2d command");
}
/* ---------------------------------------------------------------------- */
int FixEnforce2D::setmask()
{
int mask = 0;
mask |= POST_FORCE;
mask |= POST_FORCE_RESPA;
mask |= MIN_POST_FORCE;
return mask;
}
/* ---------------------------------------------------------------------- */
void FixEnforce2D::init()
{
granular = atom->check_style("granular");
}
/* ---------------------------------------------------------------------- */
void FixEnforce2D::setup()
{
if (strcmp(update->integrate_style,"verlet") == 0)
post_force(1);
else {
int nlevels_respa = ((Respa *) update->integrate)->nlevels;
for (int ilevel = 0; ilevel < nlevels_respa; ilevel++) {
((Respa *) update->integrate)->copy_flevel_f(ilevel);
post_force_respa(1,ilevel,0);
((Respa *) update->integrate)->copy_f_flevel(ilevel);
}
}
}
/* ---------------------------------------------------------------------- */
void FixEnforce2D::min_setup()
{
post_force(1);
}
/* ---------------------------------------------------------------------- */
void FixEnforce2D::post_force(int vflag)
{
double **v = atom->v;
double **f = atom->f;
int *mask = atom->mask;
int nlocal = atom->nlocal;
for (int i = 0; i < nlocal; i++)
if (mask[i] & groupbit) {
v[i][2] = 0.0;
f[i][2] = 0.0;
}
// for granular systems, zero xy rotational componenets
if (granular) {
double **phiv = atom->phiv;
double **phia = atom->phia;
for (int i = 0; i < nlocal; i++)
if (mask[i] & groupbit) {
phiv[i][0] = 0.0;
phiv[i][1] = 0.0;
phia[i][0] = 0.0;
phia[i][1] = 0.0;
}
}
}
/* ---------------------------------------------------------------------- */
void FixEnforce2D::post_force_respa(int vflag, int ilevel, int iloop)
{
post_force(vflag);
}
/* ---------------------------------------------------------------------- */
void FixEnforce2D::min_post_force(int vflag)
{
post_force(vflag);
}
Event Timeline
Log In to Comment