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Software on Kraken cluster

ANSYS

Current versions of ANSYS are installed to directories under the path 

/home/SOFT/ansys_inc/

Note that connection have to be opened with the X11 forwarding if you want to launch the graphical interface (Linux: ssh -Y; Windows: active X server and Enable X11 forwarding in PuTTy). The graphical interface is slower than working on local machine due to network transfers.

Submitting the job to Slurm scheduler is described under this link.

Beside their standard location, Ansys-workbench and Ansys-Fluent may be called by their own commands, see the table below. For other Ansys tools you need to write out the full path.

Version Directory command
Workbench Fluent
2024 R1 v241 wb241 fluent241

Running the program

Interactive mode

The commands to start each environment are listed in the table above.

ANSYS offers two environments to work in:

  • MAPDL – the original working environment, started with the command 
launchxxx
  • Workbench – new environment, launched with the command 
wbxxx

Fluent is launched with the command 

fluentxxx

Working in interactive mode directly on the servers is not very comfortable. Servers are primarily for computing and have little graphics power. It is preferable to prepare the task interactively on the PC and then run the calculation on the servers. The results can then be viewed again on the PC.

Batch execution

Documentation for batch mode is located in the program help in 

ANSYS Documentation -> Mechanical APDL -> Operation Guide -> 3. Running the Mechanical APDL Program -> 3.4 Batch Mode

The calculation is started with the command 

ansysxxx -b -p productvar < inputname > outputname 2>&1

If we want to run the calculation in the background, then with the command 

nohup ansysxxx -b -n nnn -p productvar < inputname > outputname 2>&1 &

where xxx corresponds to the version (172, 190, 193, 201), nnn is the number of cores used (max 16) and productvar specifies the license used. The values are given in the following table. If the license is not directly specified, Academic Teaching is used.

productvar license
aa_t_a Academic Teaching
aa_r Academic Research

If the ansysxxx command doesn't work (no link is created in /usr/local/bin), you need to write out the full path 

/ansys_inc/vxxx/ansys/bin/ansysxxx -b -p productvar < inputname > outputname 2>&1