Neper

Overview

Neper is a software package for polycrystal generation and meshing. It can deal with 2D and 3D polycrystals with very large numbers of grains. Neper is built around four modules: generation, meshing, simulation and visualization. All the input data are prescribed |non-interactively, using command lines and / or ASCII files.

Neper uses several external software packages:

mesh-specific packages: Gmsh, libScotch.
general-purpose packages: GNU Scientific Library (GSL)
graphics package: POV-Ray

Version 4.0.1 is available on CSF3.

Restrictions on use

Neper is distributed as a free/open-source software, under the terms of the GNU General Public License (GPL).

Set up procedure

To use the software you will need to load the modulefile:

# Neper 4.0.1
module load apps/gcc/neper/4.0.1

This will load all required packages including gmsh and povray as well as the NLopt library.

Running the application

Neper must be run in batch

Examples

Serial batch job submission

• Make sure you have the module loaded.
• Create or upload an input file to your working directory.
• Write a submission script, for example:

  #!/bin/bash --login
  ## Use the current directory as the working directory - input and output files are here
  #$ -cwd
  
  module load apps/gcc/neper/4.0.1
  
  neper module_name module_arguments 
  # Where the module name can be -T,-M,-S or-V, and the module arguments can include both required input data and options.
  
  

• Submit with: qsub scriptname

Parallel batch job submission

• Make sure you have the module loaded.
• Create or upload an input file to your working directory.
• Write a submission script, for example:

  #!/bin/bash --login
  ## Use the current directory as the working directory - input and output files are here
  #$ -cwd
  #$ -pe smp.pe 4          # Number of cores (2--32). 
  
  export OMP_NUM_THREADS=$NSLOTS
  
  module load apps/gcc/neper/4.0.1
  
  neper module_name module_arguments 
  # Where the module name can be -T,-M,-S or-V, and the module arguments can include both required input data and options.
  

• Submit with: qsub scriptname

Further info

• Further information including detailed documentation can be found on the Neper Website