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Client-Server Setup
Simcenter STAR-CCM+ uses a client-server architecture in which the simulation objects are created on the server and the client provides access to these objects for setup and display.
Command-Line Reference
Working with .ini Files
You can use an .ini file as a shortcut for general and client command line options when starting local Simcenter STAR-CCM+ simulations.

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Client-Server Setup
Simcenter STAR-CCM+ uses a client-server architecture in which the simulation objects are created on the server and the client provides access to these objects for setup and display.
- Client-Server Connections
  Simcenter STAR-CCM+ allows you to connect a client to any running server for which you have access, and also to disconnect clients when you choose. The client version must match the server version for a successful connection. Secure connections require additional inputs.
- Mixed or Double Precision
  Simcenter STAR-CCM+ comes in two versions: a mixed precision version and a double precision version. Both versions are provided on the download area of the Support Center portal.
- Running Simcenter STAR-CCM+ on Linux ARM64
  Simcenter STAR-CCM+ is supported on Linux ARM64 for running simulations in batch mode. The graphical user interface (GUI) is not officially supported in this release. Some other restrictions are in place for this platform, including unsupported modules.
- Launching Simcenter STAR-CCM+ and Working With Simulations
  A Simcenter STAR-CCM+ simulation exists on a server, and is accessed by connecting a client to the server on which the simulation exists.
- Working With Parallel Servers
  A parallel computation is one where the work is computed by more than one process.
- GPGPU Computation
  The idea behind general-purpose computing on graphics processing units (GPGPU computation) is that you assign computations that are traditionally solved on a CPU (central processing unit) to a graphics processing unit (GPU). The nature of operations on the GPU means that a single unit can deliver computational performance comparable to using many CPUs in parallel. GPGPU computation is only supported for Simcenter STAR-CCM+ servers running under Linux.
- Teamcenter Share
  Teamcenter Share is a collaboration platform that you can access directly within the Simcenter STAR-CCM+ workspace as well as in a web browser. Teamcenter Share allows you to upload and share simulation files and related data, such as Viewer (.sce) files. Through the integration within Simcenter STAR-CCM+, you can download and open files from this platform.
- Command-Line Reference
  - Working with .ini Files
    You can use an .ini file as a shortcut for general and client command line options when starting local Simcenter STAR-CCM+ simulations.
    - Creating a Global .ini File
      System administrators can create a global .ini file that contains command line options that affect all users. This ability is particularly useful if there are system-wide options that all users should be using.

Working with .ini Files

You can use an .ini file as a shortcut for general and client command line options when starting local Simcenter STAR-CCM+ simulations.

To use this feature, add the -ini option to your line command:

% starccm+ -ini myinifile.ini <simfile>

The file contains simple listed commands, with any line beginning with # considered a comment. For instance, if you usually prefer to use rsh rather than ssh on your system, the .ini file could look like the following:

# set default rsh command 
-rsh rsh

A more complex .ini file could be constructed as follows:

# set default rsh command
-rsh rsh
# set batchsystem and always allocate the controller process to a cpu/core shared with a worker process
-batchsystem pbs:
# MPI options 
#   - Intel MPI
#   - PSM2 fabric
-mpi intel
-fabric psm2

Arguments that are passed on the command line take precedence over the ones that are listed in the .ini file. For example, suppose that you issue the following command line:

% starccm+ -ini myinifile.ini <simfile> -rsh ssh

The -rsh argument in the command line takes precedence over the one in the .ini file. Currently there is no way to merge these two arguments.

Your system administrator can create a global .ini file that applies these options to all servers.