LMGC90

Introduction

LMGC90 is a free and open source software dedicated to multiple physics simulation of discrete material and structures.

Modules

The LMGC90, version 2017.rc1 is available on Salomon via module LMGC90:

$ ml LMGC90

The module sets up environment variables and loads some other modules required for running LMGC90 Python scripts. This particular command loads the default module LMGC90/2017.rc1-GCC-6.3.0-2.27 and modules:

GCCcore/6.3.0
binutils/2.27-GCCcore-6.3.0
GCC/6.3.0-2.27
bzip2/1.0.6
zlib/1.2.8
ncurses/6.0
libreadline/6.3
Tcl/8.6.3
SQLite/3.8.8.1
Python/2.7.9

Running Generic Example

LMGC90's main API is a Python module. It comes with a pre-processor written in Python. There are several examples that you can copy from the examples directory which is in the /apps/all/LMGC90/2017.rc1-GCC-6.3.0-2.27 folder. Follow the next steps to run one of them.

First choose an example and open a terminal in the directory of the copied example.

Generation

For more information on the pre-processor, open in a web navigator the file [docs/pre_lmgc/index.html][pre_lmgc].

To run an example, if there is no DATBOX directory or it is empty, run the Python generation script which is mostly called gen_sample.py with the command:

$ python gen_sample.py

You should now have a DATBOX directory containing all needed .DAT and .INI files.

Computation

Now run the command script usually called command.py:

$ python command.py

For more information on the structure on command scripts, read the documentation opening the file [docs/chipy/index.html][chipy] in a web browser. Once the computation is done, you should get the directory OUTBOX containing ASCII output files, and a DISPLAY directory with an output file readable by paraview.

Postprocessing and Visualization

The ASCII files in the POSTPRO directory result from the commands in the DATBOX/POSTPRO.DAT file. For more information on how to use these features, read the documents [manuals/LMGC90_Postpro.pdf][LMGC90_Postpro.pdf]. The files inside the DISPLAY directory can be visualized with paraview. It is advised to read the .pvd files which ensure time consistency. The different output files are:

  • tacts: contactors of rigid objects
  • rigids: center of mass of rigid objects
  • inter: interactions
  • mecafe: mechanical mesh
  • therfe: thermal mesh
  • porofe: porous mechanical mesh
  • multife: multi-phasic fluid in porous media mesh

Welcome pre_lmgc chipy LMGC90_Postpro.pdf

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