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LS-Dyna

LS-Dyna is a gen­er­al-pur­pose fi­nite el­e­ment pro­gram ca­pa­ble of sim­u­lat­ing com­plex re­al world prob­lems. It is used by the au­to­mo­bile, aero­space, con­struc­tion, mil­i­tary, man­u­fac­tur­ing, and bio­engi­neer­ing in­dus­tries1.

Installed Versions

We have two versions of LS-Dyna installed, 15.0.2 and 13.1.1. To use them:

module load ls-dyna/smp/15.0.2

or

module load ls-dyna/smp/13.0.1

Example Job Script

The example is taken from https://www.dynaexamples.com/icfd/basics-examples/cylinder_flow

This is an example of a hybrid MPI-SMP (aka hybrid MPI-OpenMP) run, running on 2 nodes, using 12 MPI ranks per node (a.k.a. processes a.k.a. tasks) each of which is running 4 threads (each thread on its own CPU core). (MPI = Message Passing Interface; SMP = Symmetric Multi-Processing aka threads)

#!/bin/bash
#SBATCH --partition=def
#SBATCH --nodes=2
#SBATCH --ntasks-per-node=12
#SBATCH --cpus-per-task=4
#SBATCH --mem=8G
#SBATCH --time=1:00:00

module load ls-dyna/hyb

$MPIRUN ls-dyna ncpu=$SLURM_CPUS_PER_TASK i=i.k

About MPI

For an explanation of how MPI and hybrid MPI-OpenMP programs work, including a glossary of terms, see: Hybrid MPI-OpenMP Jobs

  1. LS-Dyna website at ANSYS/Livermore Software Technology ↩