Replacing the Engine Geometry and Re-running the Simulation

To analyze multiple engine designs using the same simulation setup, Simcenter STAR-CCM+ In-cylinder allows you to swap the CAD geometry of the cylinder and the valves and re-run the simulation.

Before you import the new CAD geometry, make sure that you have the bodies and faces prepared as described in Geometry Requirements. Additionally, the names of the new bodies and faces must match the names of the bodies and faces that you want to replace. Note that geometry swapping is not supported for cylinder sector models.
To replace the engine geometry:
  1. Right-click the Engine node and select Replace Cylinder and Valves Geometry.
  2. In the Open dialog, navigate to the folder that contains the geometry file.
  3. Select the file and click Open.
    Simcenter STAR-CCM+ In-cylinder imports the new geometry and assigns the CAD bodies and CAD faces to the respective Engine Parts and Engine Part Surfaces using the originally specified Engine Configuration and Engine Symmetry. The original CAD body is deleted

    If additional CAD faces exist, Simcenter STAR-CCM+ In-cylinder creates additional Engine Part Surfaces, assigns the CAD faces to the new Engine Part Surfaces, and sets default wall conditions. The new Engine Part Surfaces are named as follows:

    • If the CAD faces are unnamed, Simcenter STAR-CCM+ In-cylinder names the new cylinder or valves Engine Part Surfaces Default : Gases or Default : Solids, respectively.
    • If the CAD faces are named, Simcenter STAR-CCM+ In-cylinder adopts the face names for the Engine Part Surfaces.

    Note that any manipulations to the original geometry or Engine Parts—such as Splitting an Engine Part Surface—are lost when the geometry is replaced.

To re-run the simulation using the new geometry:
  1. In the Simcenter STAR-CCM+ toolbar, click (Clear Generated Meshes).
  2. Run the simulation.