Running the Simulation

The simulation is now ready to run.

To decrease the time required for completing an ICE simulation, you are advised to run Simcenter STAR-CCM+ In-cylinder simulations in parallel on multi-core machines.
To run the simulation:
Depending on whether you want to run the simulation from the GUI or from a batch client, do one of the following:
MethodProcedure
Running directly from the GUI In the Solution toolbar, click (Play/Resume "In-Cylinder").
Running from a batch client

For more information, see Running the Client in Batch.

  1. Open a command prompt and enter the following command line:

    [STAR-CCM+_INSTALL_DIR]\star\bin\starccm+ -batch [PARALLEL_OPTIONS] [WORKING_DIR]\[SIMULATION].sim

    where:

    • [STAR-CCM+_INSTALL_DIR] represents the path to the Simcenter STAR-CCM+ installation directory.
    • [PARALLEL_OPTIONS] represents optional arguments for running the simulation in parallel. See Parallel Options.
    • [WORKING_DIR] represents the path to your working directory.
    • [SIMULATION] represents the name of the simulation file.

    This command line only applies on Windows. For Linux, you must use forward slashes.

Simcenter STAR-CCM+ In-cylinder updates the geometry to represent your settings and starts the meshing process. After the mesh is complete, the simulation starts. During the run, Simcenter STAR-CCM+ In-cylinder re-meshes the geometry automatically when it meets one of the default re-mesh criteria.
For motored-test simulations, Simcenter STAR-CCM+ In-cylinder runs 10 inner iterations per time-step. For charge-motion simulations, 20 inner iterations per time-step are used in order to improve convergence and mass conservation.
By default, Simcenter STAR-CCM+ In-cylinder stops the simulation run after the specified Duration. If you use the CHT Export model, Simcenter STAR-CCM+ In-cylinder does not take into account the specified Duration but automatically runs the simulation for one cycle length. For subsequent cycle-averaging runs, you can resume Simcenter STAR-CCM+ In-cylinder and continue the run for the duration of the specified Sliding Window. At the end of each run, Simcenter STAR-CCM+ In-cylinder exports a file that contains the heat transfer data averaged over the last cycle length.