Extracting the Fluid Geometry

To create a geometry part for the fluid, you use operations that extract the internal fluid volume from the solid manifold geometry.

To extract the fluid volume, you first create surfaces that close the solid geometry at the inlets and outlet using the Fill Holes operation. This operation requires you to mark the holes by specifying either the curves around the holes or the surfaces that contain the holes. In this case, the solid surfaces contain additional holes other than the inlets and outlet. To avoid closing all holes, you identify the curves around the inlets and outlet.
  1. Right-click the Geometry > Operations node and select New > Surface Preparation > Fill Holes.
  2. In the Create Fill Holes Operation dialog, set the following properties:
    Property Setting
    Input Parts Manifold
    End Curves
    • ToCylinderHead
    • ToTurbo
    Execute Operation Upon Creation Activated
  3. Click OK.
    Simcenter STAR-CCM+ executes the operation and creates a part named Fill Holes. This part contains the surfaces that close the inlet and outlet.
To extract the internal fluid volume:
  1. Right-click the Operations node and select New > Surface Preparation > Extract Volume.
  2. In the Create Extract Volume Operation dialog, set the following properties:
    Property Setting
    Parts
    • Fill Holes
    • Manifold
    Execute Operation Upon Creation Activated
  3. Click OK.
    Simcenter STAR-CCM+ creates a part named Extract Volume.
  4. Select the Geometry > Parts > Extract Volume node and rename it Internal Fluid.
    The Internal Fluid part contains the required inlet, outlet, and internal surface:

    To visualize the extracted fluid volume, you can add the surfaces of the Internal Fluid part to a geometry scene.

  5. Save the simulation.