National University of Singapore

What is the latest version of CFX?

The latest version of CFX is 12.1. As a generic CFD solver, CFX 12.1 supports fully unstructured meshing. This makes CFX 12.1 a powerful package for problems with complex geometry and is easier to use. CFX 12.1 also supports fully explicit and coupled solution method that requires larger memory but much shorter computational time.

Which pre- and post-processors should I use?

ANSYS Workbench is the default pre-processor for CFX. It is an integrated platform for geometry creation and mesh generation. Geometry can be built directly within Workbench using the intuitive graphics user interface (GUI), or import from other CAD platforms.

CFX-Post or CFD-Post is an object-orient based post-processor for the CFX solvers. It is an easy to use and efficient post processing tool.

Where can I run the pre- and post-processors?

You can run the CFX and Workbench interface interactively at MobileVisLab or Cluster_AtlasX from HPC Portal--> Run Jobs/Apps. The command to start Workbench (pre-porcessor) and CFXPost (post-processor) is:

> workbench &

> cfx5post &

How to start CFX GUI?

The "cfx5" command will bring up the CFX Launcher interface. You can run CFX-Pre, CFX5-Solver, and CFX-Post from the interface buttons. Alternatively, you can open each individual interface by entering command cfx5pre, cfx5solve, or cfx5post, respectively.

Where can I run the CFX solver?

You can run the CFX solver interactively at MobileVisLab or Cluster_AtlasX from HPC Portal --> Run Jobs/Apps for small jobs.

What are the queues and the command I can use to submit CFX batch job?

CFX serial solver is supported at LSF queues linux64, atlas4_large and atlas5_large

You can submit a batch CFX job like:

> bsub –q linux64 -o myjob.o "cfx5solve -batch -def case1.def -name case1"

where

• -q linux64: submit job to queue linux
  
• -o myjob.o: save standard output information to file "myjob.o"
  
• 'cfx5solve -batch -def case1.def -name case1': run CFX5 solver in batch mode with the definition file
  'case1.def' and save the results and output data to case1.*.
  
  

Can I run CFX solver in parallel and How?

No, CFX solver can not run in parallel in HPC Cluster due to the license issue.

Where can find the CFX Tutorial files to practice the tutorials?

To access the tutorial files, you need logon to any HPC host. The CFX tutorial files are saved in folder /app1/common/ansys/ansys_inc/help/12.1/Tutorials/Zip/. Please copy the needed files to your own space for practice.