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#!/bin/bash
#SBATCH -t 00:10:00
#SBATCH --nodes=2
#SBATCH --ntasks-per-node=96
#SBATCH -L ansys
#SBATCH -p standard96:test
#SBATCH --mail-type=ALL
#SBATCH --output="cavity.log.%j"
#SBATCH --job-name=cavity_on_cpu
 
module load ansys/2023r2
srun hostname -s > hostfile
echo "Running on nodes: ${SLURM_JOB_NODELIST}"
 
fluent 2d -g -t${SLURM_NTASKS} -ssh  -mpi=intel -pib -cnf=hostfile << EOFluentInput >cavity.out.$SLURM_JOB_ID
      ; this is an Ansys journal file aka text user interface (TUI) file
      file/read-case initial_run.cas.h5
      parallel/partition/method/cartesian-axes 2
      file/auto-save/append-file-name time-step 6
      file/auto-save/case-frequency if-case-is-modified
      file/auto-save/data-frequency 10
      file/auto-save/retain-most-recent-files yes
      solve/initialize/initialize-flow
      solve/iterate 100
      exit
      yes
EOFluentInput
 
echo '#################### Fluent finished ############'

#!/bin/bash
#SBATCH -t 00:10:00
#SBATCH --nodes=2
#SBATCH --ntasks-per-node=4
#SBATCH -L ansys
#SBATCH -p gpu-a100  ### on GPU-cluster of NHR@ZIB
### (on Emmy gpu-a100
is called gpu)
#SBATCH --output="slurm.log.%j"
#SBATCH --job-name=cavity_on_gpu

module add gcc openmpi/gcc.11 # external OpenMPI is CUDA aware
module add ansys/2023r2_mlx_openmpiCUDAaware

hostlist=$(srun hostname -s | sort | uniq -c | awk '{printf $2":"$1","}')
echo "Running on nodes: $hostlist"

cat <<EOF >fluent.jou
; this is an Ansys journal file aka text user interface (TUI) file
parallel/gpgpu/show
file/read-case initial_run.cas.h5
solve/set/flux-type yes
solve/iterate 100
file/write-case-data outputfile
ok
exit
EOF

fluent 2d -g -t${SLURM_NTASKS} -gpgpu=4 -mpi=openmpi -pib -cnf=$hostlist -i fluent.jou  >/dev/null 2>&1
echo '#################### Fluent finished ############'

Ansys only supports certain GPU vendors/models:
https://www.ansys.com/it-solutions/platform-support/previous-releases
Look here for the PDF called "Graphics Cards Tested" of your version... (most NividiaNvidia, some AMD)