An object-oriented Computational Fluid Dynamics(CFD) toolkit

Description

OpenFOAM core is an extensible framework written in C++, i.e. it provides a sufficient abstraction for a programmer to build their own code for an underlying mathematical model.

Prerequisites

OpenFOAM is a free, open source software which is released under the GNU-GPL license

Modules

The following versions of OpenFOAM are installed in HLRN system

OpenFOAM version	OpenFOAM module file	Requirements	HLRN Site
v4	openfoam/gcc.9/4	gcc/9.2.0, openmpi/gcc.9/3.1.5	Berlin, Goettingen
v5	openfoam/gcc.9/5	gcc/9.2.0, openmpi/gcc.9/3.1.5	-
v6	openfoam/gcc.9/6	gcc/9.2.0, openmpi/gcc.9/3.1.5	-
v7	openfoam/gcc.9/7	gcc/9.2.0, openmpi/gcc.9/3.1.5	-
v1912	openfoam/gcc.9/v1912	gcc/9.2.0, openmpi/gcc.9/3.1.5	-

Running OpenFOAM

The following steps are followed before running OpenFOAM in parallel in a distributed processors system:

Adjust the settings

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Example Jobscripts

#!/bin/bash#SBATCH --time 1:00:00
#SBATCH --nodes 1 
#SBATCH --tasks-per-node 96 
#SBATCH -p standard96
#SBATCH --job-name=of_test_job
#SBATCH --output=outlog/ol-%x.%j.out
#SBATCH --error=outlog/ol-%x.%j.err

export I_MPI_FALLBACK=0
export I_MPI_DEBUG=6
export I_MPI_FABRICS=shm:ofi
export I_MPI_OFI_PROVIDER=psm2
export I_MPI_PMI_LIBRARY=libpmi.so

#--------------------------------------

module load gcc/9.2.0
module load openmpi/gcc.9/3.1.5
module load openfoam/gcc.9/5
# Working Directories
#---------------------
WORKDIR=$TMPDIR/openfoam# initialize OpenFOAM environment
source $WM_PROJECT_DIR/etc/bashrc
. ${WM_PROJECT_DIR:?}/bin/tools/RunFunctions  # Tutorial run functions#---------------

cd $WORKDIR
# run OpenFOAM in parallel
#--------------------------runApplication decomposeParrunParallel pimpleFoam
#clean the work directory#----------------------------rm -rf processor*

Compiling Own Code Over OpenFOAM

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OpenFOAM Best Practices

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OpenFOAM