ESyS-Particle(2011-11-22) ESyS-Particle(2011-11-22)
NAME
ESyS-Particle - HPC Discrete Element Modelling Software.
SYNOPSIS
mpirun -np 3 mpipython script.py
Parameter -np should correspond to the number of threads.
DESCRIPTION
ESyS-Particle ESyS-Particle is Open Source software for particle-based numerical modelling. The software implements the Discrete Element
Method (DEM), a widely used technique for modelling processes involving large deformations, granular flow and/or fragmentation. ESyS-Parti-
cle is designed for execution on parallel supercomputers, clusters or multi-core PCs running a Linux-based operating system. The C++ simu-
lation engine implements spatial domain decomposition via the Message Passing Interface (MPI). A Python wrapper API provides flexibility in
the design of numerical models, specification of modelling parameters and contact logic, and analysis of simulation data. ESyS-Particle
has been used to simulate earthquake nucleation, comminution in shear cells, silo flow, rock fragmentation, and fault gouge evolution, to
name but a few applications.
See https://launchpad.net/esys-particle for documentation.
BUGS
Please report bugs to the special topic on Launchpad-page of the project:
https://bugs.launchpad.net/esys-particle
COPYRIGHT
Open Software License version 3.0 Primary Business: Brisbane, Queensland, Australia http://www.opensource.org/licenses/osl-3.0.php
ESyS-Particle(2011-11-22)
Check Out this Related Man Page
GPIV_PEAKLCK(1) General Commands Manual GPIV_PEAKLCK(1)NAME
gpiv_peaklck - Tests PIV data on the so-called peak-locking effect by printing/displaying an histogram of the particle displacements at
sub-pixel level.
SYNOPSIS
gpiv_peaklck [-g] [-h | --help] [-n N] [-p | --print] [-v | --version] [filename] < stdin > stdout
DESCRIPTION
Peak-locking effects in Particle Image Velocimetry (PIV) result into estimations of the particle displacements that are mainly at an inte-
ger number of pixels, instead of at sub-pixel displacements. This effect may due to stretching of the (round) pixel images, due to a too
low resolution of the pixel-image or may be due to signal interferences of the data from camera to frame grabber. Gpiv_Peaklck calculates
the particle displacement distribution at sub-pixel level in between 0.0 an 1.0 (0 included, 1 excluded). If peak locking occurs, a non-
uniform distribution of the estimated particle displacements at sub-pixel level will be found.
The configuration parameters (containing the VALID key) may be overruled by the command line options, as explained below.
Options-g Graphical visualization of the histogram with gnuplot.
-h | --help
On-line help
-n N Override number of bins (default 10, hard coded).
-p | --print
Print parameters, command line options and eventually used input and output filenames to stdout. The output is identic of file-
name.par, in case -f is used.
-v | --version
Print version information on standard output, then exit successfully.
filename
Input PIV data file. Overrides stdin and stdout. Output will be written to filename.plk. The parameters will be written or appended
to filename.par and may be used for future use by including them in ./gpivrc.
SEE ALSO
gpivtools
AUTHOR
Gerber Van der Graaf
BUGS
The program seems to work fine with real PIV data. So far, no serious bugs have been found.
8 November 2006 GPIV_PEAKLCK(1)
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