CFX
ANSYS CFX is software for computational fluid dynamics that is available on the Intel Cluster.
Usage Conditions¶
Currently licensed ANSYS CFX users can apply for access to the ANSYS CFX
install at the CCI. Email
to apply for
access.
Environment Setup¶
Before using any CFX applications first load the ANSYS module to setup your environment
module load proprietary/ansys/[14.5|15.0]
Common Commands¶
- run workbench
runwb2 - run cfx launcher
cfx5
Partition and Solve From A Definition File¶
The following slurm script will partition the problem defined in the 'StaticMixer.def' file
/gpfs/sb/software/amd64-rhel5/proprietary/cfd/ansys/14.5/v145/CFX/examples/StaticMixer.def
to the number of processes, $SLURM_NPROCS, you request when submitting the slurm job and then run the solver on that partition using $SLURM_NPROCS processes.
Create a file named runCFX.sh with the following contents
#!/bin/bash
srun hostname -s > /tmp//hosts.$SLURM_JOB_ID
if [ "x$SLURM_NPROCS" = "x" ]; then
if [ "x$SLURM_NTASKS_PER_NODE" = "x" ];then
SLURM_NTASKS_PER_NODE=1
fi
SLURM_NPROCS=expr $SLURM_JOB_NUM_NODES \* $SLURM_NTASKS_PER_NODE
fi
# use ssh instead of rsh
export CFX5RSH=ssh
# format the host list for cfx
cfxHosts=tr '\n' ',' < /tmp//hosts.$SLURM_JOB_ID
# run the partitioner and solver
cfx5solve -par -par-dist "$cfxHosts" -def ../StaticMixer.def -part $SLURM_NPROCS -start-method "Platform MPI Distributed Parallel"
# cleanup
rm /tmp/hosts.$SLURM_JOB_ID
Submit the job to use 16 processes across two nodes with a max wall time of 10 minutes
sbatch -n 16 -N 2 -t 10 ./runCFX.sh
When the job completes the following files should be output
StaticMixer_001.res # cfx results file
StaticMixer_001.out # cfx partitioning and solve log file
slurm-.out # slurm log file