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CFX is a Computational Fluid Dynamics (CFD) and Engineering package. CFX contains:

• Advanced coupled multigrid linear solver technology
• meshing flexibility
• parallel enabled
• pre- and post-processing capabilities

Examples of uses include: multiple frame of reference, turbulence, combustion and radiation, Eulerian two phase and free surface flow.

In addition, CFX offers an open architecture that encourages customization on all levels. Both input and results are in accessible formats that allow easy customizationAnsys CFX is the industry-leading computational fluid dynamics software for turbomachinery applications. It offers highly scalable, high-performance computing (HPC) to help solve simulations quickly and cost effectively.

Usage

NCI installs CFX as part of the ANSYS package, load ansys module to add the executables into your search path.

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A example job submission script (cfxjob.sh) is provided below. It requests 96 processors, 380 GB of memory, 400GB of local disk space for 10 minutes in the normal queue and tells the job to mount /g/data/ab01 and /scratch/ab01 project folder into the job. Within the job it tells CFX to use the start method "Gadi_openmpi" and the loaded openmpi by the ansys module to run the simulation on $PBS_NCPUS processors.

#!/bin/cshbash

#PBS -q normal
#PBS -l walltime=00:10:00
#PBS -l ncpus=96
#PBS -l mem=380Gb
#PBS -l jobfs=400GB
#PBS -l storage=gdata/ab01+scratch/ab01
#PBS -l software=<license_string>
#PBS -l wd

module load ansys/2021r1
module load ansys_licence/<institution>

# Must include `#PBS -l storage=scratch/ab12+gdata/yz98` if the job
# needs access to `/scratch/ab12/` and `/g/data/yz98/`. Details on
# https://opus.nci.org.au/display/Help/PBS+Directives+Explained.

export CFX5_OPENMPI_DIR=$OPENMPI_ROOT
cfx5solve -def "StaticMixer.def" -part $PBS_NCPUS -start-method Gadi_openmpi

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