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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.
Starting a Server without a Client
You can open an existing simulation in a server without explicitly starting the client.

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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.
  - Providing Remote Server Access
    Before Simcenter STAR-CCM+ can launch server processes on remote machines, you must provide details of a remote shell environment that Simcenter STAR-CCM+ can use. This environment must not require any password when making connections, although you can use a different username from your own.
  - Server Processes Reference
    Server processes are listed beneath the Local Servers node in the Servers window. Additionally, this node has its own pop-up menu that provides server-specific actions.
  - Connect to Server Dialog Reference
    Simcenter STAR-CCM+ allows you to manually enter details of a server to which you wish to connect.
  - Connecting a Client from the Command Line
  - Running the Client in Batch
    Large simulations generally require that you prepare the case on your local machine, then submit the case to a remote machine, or remote cluster, for running. In these cases, you can use the Simcenter STAR-CCM+ batch client that executes a series of commands from a macro file without user interaction.
  - Configuring the Server to Shutdown When Idle
    You can configure Simcenter STAR-CCM+ to release a license automatically (by shutting down the server) when it detects no activity for a set amount of time.
  - Closing the Server Automatically Upon Solver Completion
  - Working with Remote Servers
    The client-server model employed in Simcenter STAR-CCM+ allows you to start a server on a different machine to the client workspace.
  - Starting a Proxy Server on a Host
    You can specify a host on which to start a proxy server using the -proxy <host> option.
  - Starting a Server without a Client
    You can open an existing simulation in a server without explicitly starting the client.
  - Displaying Diagnostic Messages from the Server and Client
    To troubleshoot client-server connections, the server locator allows you to gather diagnostic information from the client and server in one place.
  - Setting Network Binding Order for Failed Visualization Connections
- 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

Starting a Server without a Client

You can open an existing simulation in a server without explicitly starting the client.

In this scenario, the server will start and the simulation file will be opened and the server will simply wait for a client to connect to it. This may be useful if you want to start a remote server from a Windows machine for example.

To open a simulation on a server without launching the client, issue the following command:

% starccm+ -server -port [portnumber] file.sim

The server will use the port specified via the -port option (default 47827) or the first open port after the specified port, until it has tried the number of ports specified via -portrange (default 100). If it cannot find an open port in that range (default 47827 - 47927), the server will print a message and exit.