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#!/bin/bash
#SBATCH --time 1:00:00
#SBATCH --nodes 21
#SBATCH --tasks-per-node 96
#SBATCH --partition standard96cpu-clx:test
#SBATCH --job-name foam_test_job
#SBATCH --output ol-%x.%j.out
#SBATCH --error ol-%x.%j.err

module load gcc/9.3.0 openmpi/gcc.9/3.1.5
module load openfoam/gcc.9/v2112v2406

. $WM_PROJECT_DIR/etc/bashrc$FOAM_INIT                					# initialize OpenFOAM environment
. $WM_PROJECT_DIR/bin/tools/RunFunctions    # source OpenFOAM helper functions (wrappers)

tasks_per_node=${SLURM_TASKS_PER_NODE%\(*}
ntasks=$(($tasks_per_node*$SLURM_JOB_NUM_NODES))
foamDictionary -entry "numberOfSubdomains" -set "$ntasks" system/decomposeParDict # number of geometry fractions after decompositon will be number of tasks provided by slurm

date "+%T"
runApplication blockMesh                    # create coarse master mesh (here one block)
date "+%T"

runApplication decomposePar                 # decompose coarse master mesh over processors
mv log.decomposePar log.decomposePar_v0
date "+%T"

runParallel snappyHexMesh -overwrite        # parallel: refine mesh for each processor (slow if large np) matching surface geometry (of the motorbike)
date "+%T"

runApplication reconstructParMesh -constant # reconstruct fine master mesh 1/2 (super slow if large np)
runApplication reconstructPar -constant     # reconstruct fine master mesh 2/2
date "+%T"

rm -fr processor*                           # delete decomposed coarse master mesh
cp -r 0.org 0                               # provide start field
date "+%T"

runApplication decomposePar                 # parallel: decompose fine master mesh and start field over processors
date "+%T"

runParallel potentialFoam                   # parallel: run potentialFoam
date "+%T"

runParallel simpleFoam                     # parallel: run simpleFoam
date "+%T"