ANSYS System Coupling
The ANSYSSC component can be used to launch ANSYS System Coupling. This component launches ANSYS System Coupling with it’s GUI. You do not need to provide the list of machines to use for parallel execution etc., because these are automatically passed by the HPCBOX platform. There are a few application specific arguments which need to be set within the systemcoupling GUI for proper execution on the HPC cluster.
ANSYS Fluent
For ANSYS Fluent, you must set use Additional Arguments within the GUI to set the MPI configuration to Intel MPI.
ANSYS CFX
When creating the System Coupling project in ANSYS Workbench, please drop the Fluid component first and then the Structural component within your Workbench project. This is needed to make sure the CFX component is correctly named to circumvent some issues with spaces in System Coupling.
For ANSYS CFX, you must set the following Additional Arguments for the solver. These are required for triggering the use of Intel MPI and for compatibility of CFX with the latest generation AMD Epyc CPUs.
Additional Arguments: -start-method \"Intel MPI Distributed Parallel\" -ccl "$HOME/.cfx/aff-diag-disable.ccl"
Note the use of \ for the Intel MPI option and the ccl option. For other versions of ANSYS, please adjust the version numbers 2020R1 and v201 accordingly. Additional options like -part-large and memory factor options like -s can be added to Additional Arguments if required.
Example Parallel run setting
The following is an example parallel run setting for a System Coupling run where you want to use 3 machines, 45 cpu cores on each machine and dedicate one machine (45 cores) for structural and two machines (90 cores) for the Fluid part, in this case CFX.
