ESYS-Particle

Warning

All these features related to particles are supported only in the particle branch

ESYS-Particle is a Discrete Element Method (DEM) code, which can be used to simulate particle dynamics. It can be coupled with TCLB with the use od Remote Force Interface (RFI).

Getting ESYS-Particle

The best way to install the ESYS-Particle version that supports RFI it to download the source code and compile it. The ESYS code is stored kept in a Bazaar repository (similar to git), on launchpad. You can clone the apropriate branch using:

bzr clone lp:~llaniewski/esys-particle/remote-force

The main branch is at lp:esys-particle but it doesn't support RFI yet. After you cloned the repository, you can configure, compile and install the solver.

Configuration and installation

First we need to generate the configure script:

./autogen.sh

As in most cases we will want to install the code without root privilages, we need to specify the installation directory somewhere in our home directory ($HOME/esys_inst/):

./configure --prefix=$HOME/esys_inst/ CC=mpicc CXX=mpic++

After configuration, we can compile and install:

make -j 4
make install

Running ESYS

To be able to run ESYS from our special installation directory, we need to set apropriate envirnment variables:

ESPATH=$HOME/esys_inst
export PATH=$ESPATH/bin:$PATH
export LD_LIBRARY_PATH=$ESPATH/lib:$LD_LIBRARY_PATH
export PYTHONPATH=$ESPATH/lib/python2.7/site-packages:$PYTHONPATH

This can be placed in .bashrc file if we want it to persist. We can check in the right version of ESYS is executed with which esysparticle or ls -l $(which esysparticle).

The simulations can be executed with:

mpirun -np 2 esysparticle script.py 

Simulation setup

To learn ESYS-Particle, we recommend their tutorial

Post-Processing

To learn how to post-process results from ESYS-Particle please refer to another section of this manual