Geometry

The following right-click actions and dialogs are available for geometries in Simcenter STAR-CCM+ In-cylinder.

Geometry Right-Click Actions

Object Right-Click Action
Geometry
Import CAD Model
Opens a dialog that allows you to import a 3D CAD geometry of the engine cylinder, ports, and valves. For information on the supported file formats, see Geometry Requirements.
The following import options are available:
  • Repair Invalid Bodies: When On, Simcenter STAR-CCM+ attempts to heal errors with the underlying Parasolid geometry and reports on the number of invalid bodies that are successfully repaired. For more information, see Repair Invalid Bodies.
  • Remove Redundant Topology: When On, Simcenter STAR-CCM+ removes redundant edges and vertices.

    The following image shows a CAD geometry before and after removing redundant topology:



  • Check Body Validity: When On, checks the validity of the CAD geometry during the import process. See Checking Geometry Validity.
Import 2D Curve
Opens a dialog that allows you to import a 2D geometry spline in *.csv format that describes the profile of a cylinder sector. For information on the profile definition, see Geometry Requirements.
For Imported 2D Section Type, the following options are available:
  • Head and Piston Bowl (At BDC): Imports a closed spline that describes the profile of the cylinder sector with the piston at TDC position.
  • Piston Bowl Only (AT BDC): Imports an open spline that describes the profile of the piston bowl at BDC position.
  • Head and Piston Bowl (At BDC): Imports an open spline that describes the profile of the cylinder head and the piston at BDC position.
New Construction Geometry > [construction geometry]
Creates a new geometry using a graphical editor. The following shape templates are available:
  • Block
  • Sphere
  • Cylinder
  • Sheet Body Rectangle
  • Sheet Body Circle
For more information, see Shape Templates.
Transfer Cad Bodies
Transfers bodies created in 3D-CAD to Simcenter STAR-CCM+ In-cylinder.
Edit 3D-CAD Model
Opens the CAD model of the engine in 3D-CAD.
NoteWhen you modify the CAD model in 3D-CAD, swapping the geometry of the cylinder and the valves using Replace Cylinder and Valves Geometry is not supported.
Show Only Unused Construction Geometry
Hides all geometries from the Graphics window that are used to define the engine.
[geometry]
Boolean Construction Geometry
Allows you to perform Boolean unite and subtract operations on the selected geometry. The result is a new geometry that is added to the Geometry node. See Boolean Operations.
Pattern Construction Geometry
Allows you to perform a linear pattern operation on the selected geometry. The result is a new geometry that contains multiple identical geometries that follow a regular formation along straight lines. You can define the pattern by one or by two linear directions extending from the original geometry. The number of bodies and the distance between them determine the extent of the pattern. See Boolean Operations.
Hide
Hides the selected geometry from the Graphics window. This action is useful for gaining a clear view of other objects. You can restore hidden objects again by using the Show action.
Show
Restores a hidden geometry.
Edit
Opens a dialog that allows you to set geometry properties. See Geometry Dialog.
Position
Launches the Positioning Tool that allows you to interactively place the selected geometry in reference to other geometries.

Geometry Dialog

Source of Geometry Property
Shape template (Block, Sphere, Cylinder, Sheet Body Rectangle, Sheet Body Circle) See Shape Templates.
3D-CAD Modeler in Simcenter STAR-CCM+
Name
Specifies the name of the geometry under which it is stored in the tree.
Geometry
Local Origin
Specifies the position of the geometry's local coordinate system. See X_or, Y_or, Z_or in the Graphics window. It is used as reference for placing the geometry in the simulation domain. The following options are available:
  • Center of Bounding Box: Center of the box that bounds the imported geometry.
  • Bottom (ZMin) Center of Bounding Box: Center of the Zmin face of the bounding box.
  • Bounding Box: +-X/+-Y/+-Z: A corner of the bounding box. For example, Bounding Box: +X/-Y/+Z sets the local origin to the corner that corresponds to the maximum X coordinate, the minimum Y coordinate and the maximum Z coordinate.
  • Custom: This value appears when you set the local origin interactively within the Graphics window.
Placement
See Placement properties.
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