Computational fluid dynamics solver focused on turbo-machinery (vertex-centered FVM)

General Information

To obtain and checkout a product license please read Ansys Suite first.

Documentation and Tutorials

Besides the official documentation and tutorials (see Ansys Suite), another alternative source is: https://cfd.ninja/tutorials

Example Jobscripts

Example input files e.g. StaticMixer.def can be found at $CFXROOT/examples (after loading the Ansys module).

Parallel distributed memory student job on 2 nodes with 40 tasks per node

#!/bin/bash
#SBATCH -t 00:10:00
#SBATCH --nodes=2
#SBATCH --ntasks-per-node=40
#SBATCH -L ansys
#SBATCH -p medium40:test
#SBATCH --mail-type=ALL
#SBATCH --job-name=StaticMixer

module load ansys/2023r1
#module load ansys/2022r2 # working alternative
source $ANSYSLIC_DIR/cfx5solve_redef_with_student_lic

## create list of hosts in calculation
srun hostname -s > hostlist.$SLURM_JOB_ID

## format the host list for cfx
cfxhostlist=`tr '\n' ',' < hostlist.$SLURM_JOB_ID`

echo $cfxhostlist

# start the solver
cfx5solve -def StaticMixer.def -start-method "Intel MPI Distributed Parallel" \
-double -affinity "explicit" -par-dist "$cfxhostlist"

echo '#################### CFX finished ############'
sleep 2
rm hostlist.$SLURM_JOB_ID

Two parallel jobs each with 8 tasks both running simultaneously on the same node

#!/bin/bash
#SBATCH --time=01:00:00
#SBATCH --nodes=1
#SBATCH --ntasks-per-node=16	
#SBATCH --licenses=ansys
#SBATCH --partition=standard96:test
#SBATCH --job-name=testjob

hostlist_per_cfx5solve=$SLURM_JOB_NODELIST"*8"
echo "hostlist_per_cfx5solve "$hostlist_per_cfx5solve

module load ansys/2020r2
# cfx5solve -help

# start the solver
cfx5solve -def StaticMixerA.def -start-method "Intel MPI Distributed Parallel" \
        -double -par-dist "$hostlist_per_cfx5solve" -name $SLURM_JOB_NAME.$SLURM_JOB_ID.a &

echo "first cfx5solve is running in background"

cfx5solve -def StaticMixerB.def -start-method "Intel MPI Distributed Parallel" \
        -double -affinity "explicit" -par-dist "$hostlist_per_cfx5solve" -name $SLURM_JOB_NAME.$SLURM_JOB_ID.b 

# wait for all children processes (background jobs) to finish
wait

echo '#################### CFX finished ############'