A Package for Computational Fluid Dynamics Simulations

General Information

The ANSYS software package is developed and distributed by ANSYS, Inc..

Details of the HLRN Installation of ANSYS

The ANSYS versions currently installed are

Usage and Licensing at HLRN

The use of Ansys is restricted to members of the ansys user group. You can apply to become a group member at support[at]hlrn.de
Please note the license conditions: Our academic licenses are restricted to students, PhD students, teachers and trainers of public institutions. They cannot be used in projects that are financed by industrial partners.

The flag "#SBATCH -L ansys" ensures that the scheduler starts jobs only, when licenses are available.
You can check the availability yourself: scontrol show lic

• aa_r is a "ANSYS Academic Research License" with 16 inclusive tasks. Research jobs with more than 16 tasks cost additional "aa_r_hpc" licenses.

• aa_t_a is a "ANSYS Academic Teaching License" with a maximum of 16 tasks. These may be used only for student projects, student instruction and student demonstrations. Eligible users are allowed to activate these, by adding the flag
  

  Activation of the aa_t_a license

  -lpf $ANSYSLIC_DIR/prodord/license.preferences_for_students_and_teaching.xml

  to the Ansys executable, such as "cfx5solve". The path $ANSYSLIC_DIR is provided after loading any Ansys module. Alternatively, eligible users are allowed to redefine their command "cfx5solve" with

  Redefining cfx5solve for students

  source $ANSYSLIC_DIR/cfx5solve_redef_with_student_lic

  after loading the Ansys module inside the job script. This will append the flag "-lpf ..." to "cfx5solve" automatically if less than 17 task are requested.

Example Jobscripts

#!/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
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 -par-dist "$cfxhostlist"

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

#!/bin/bash
#SBATCH --time=01:00:00
#SBATCH --nodes=1
#SBATCH --ntasks-per-node=16	
#SBATCH --licenses=ansys:16  # match number to nodes*ntasks-per-node
#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 -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 ############'