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OpenFoam.md

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How to install OpenFOAM

(ref: openfoamWiki)

OpenFoam v2006 (v1906) (.com version)

  1. Download the source code.

  2. Change to the root user:

    sudo su

  3. Source the bashrc, eg. if installed under the ~/OpenFOAM directory

    source ~/OpenFOAM/OpenFOAM-v2006/etc/bashrc

  4. Test the system readiness (optional, not supported for cross-compilation)

    foamSystemCheck

  5. Compile OpenFOAM

    ./Allwmake -s -l
./Allwmake -j -s -q -l
./Allwmake -j 4 > log.make 2>&1

  6. Test the Openfoam, Create the user run directory:

    mkdir -p $FOAM_RUN

    Then, run with a simple tutorial:

    run
cp -r $FOAM_TUTORIALS/incompressible/simpleFoam/pitzDaily ./
cd pitzDaily
blockMesh
simpleFoam

OpenFoam7 (6) (ORG version)

  1. Add source:

    sudo sh -c "wget -O - https://dl.openfoam.org/gpg.key | apt-key add -"
sudo add-apt-repository http://dl.openfoam.org/ubuntu

  2. update

    sudo apt-get update

  3. Install

    sudo apt-get -y install openfoam7

  4. User Configuration

    add the following to the end of the file "~/.bashrc"

    alias of7="source /opt/openfoam7/etc/bashrc"

Useful function and tips

  1. Search through the turbulenceProperties file in foam tutorials folder, to find one containing the expression kepsilon (case insensitive) :

    find $FOAM_TUTORIALS -name "turbulenceProperties" | xargs grep -l -i kepsilon

  2. Remove all the timeserises data (folders), a quick way to delete all previous timesteps:

    foamListTimes -rm

  3. A pseudo way to reconstruct case on slurm cluster:

    #SBATCH -J recinstru
#SBATCH -p cpu20
#SBATCH --array=0-19
#SBATCH -o output_%j.out
#SBATCH -e errors_%j.err

NUM=$SLURM_ARRAY_TASK_ID

source /opt/OpenFOAM/.OF2012.bashrc
# Source tutorial run functions
. $WM_PROJECT_DIR/bin/tools/RunFunctions
t_end=1600
duration=$t_end/20  # 80

reconstructPar -time $(($NUM*80)):$(($NUM*80+80)) >log.reconstructPar$NUM

  4. multi-postProcess function, generate and run

    va=0
for z in 0 2 4 6 8
do
    for x in 0 5 10 15 20
    do
        cp sGx0z0 sGx$x-z$z 
        sed -i "s|(0|($x|g"  sGx$x-z$z  
        if [ $z != $va ]  
        then
            sed -i "s|-0.02)|-$z)|g"  sGx$x-z$z
        fi
        echo sGx$x-z$z 
    done

done

postProcess -funcs '(sGx0-z0 sGx5-z0 sGx10-z0 sGx15-z0 sGx20-z0 sGx0-z2 sGx5-z2 sGx10-z2 sGx15-z2 sGx20-z2 sGx0-z4 sGx5-z4 sGx10-z4 sGx15-z4 sGx20-z4 sGx0-z6 sGx5-z6 sGx10-z6 sGx15-z6 sGx20-z6 sGx0-z8 sGx5-z8 sGx10-z8 sGx15-z8 sGx20-z8)' -time '550:600'