Exchanged Fields Reference

Simcenter STAR-CCM+ can export fluid pressure and wall shear stress to Simcenter Nastran and import solid displacement.

You specify exported and imported fields under the relevant Zones > [Zone ] node.

Exported Fields/Imported Fields Node Right-Click Actions

Add Mechanical Field
Allows you to select the following predefined mechanical fields for import or export:
  • Pressure: available for export.
  • Wall Shear Stress: available for export. To export wall shear stress, also add the --wallshear on argument to the SimcenterMP executable. See Simcenter Nastran Launch Command Reference.
  • Displacement: available for import.

[Exported Field] Properties

The fields under the Exported Fields node are subject to the following properties:

Initialization Method
Automatically set to User-defined Initialization Value. You can change the initialization value for this field under the Zones > [Zone] > Values > Initialization Values node.
Field Stencil
Specifies the mesh stencil (Vertex or Face for surface meshes, and Vertex or Cell for volume meshes) from which Simcenter STAR-CCM+ maps the field data to be exported.
Depending on the field specification, you can either select the field native stencil or a different stencil. The native stencil is the location where Simcenter STAR-CCM+ computes the solution—its type depends on the specific field. For example, Simcenter STAR-CCM+ computes the pressure field at mesh faces, whereas the displacement field is computed at mesh vertices. When exporting data from the field native stencil, Simcenter STAR-CCM+ exports the original solution as computed at the native stencil. When exporting data from a different stencil, Simcenter STAR-CCM+ exports the solution data interpolated to the chosen stencil.
Field Treatment
Automatically set to Unmanaged. This setting indicates that Simcenter STAR-CCM+ does not perform any operation on this field before export.
Scalar/Vector Function
Automatically set to the field function that represents the exported field. If required, you can change the field function associated with the exported field.

[Imported Field] Properties

Initialization Method
Automatically set to User-defined Initialization Value. You can change the initialization value for this field under the Zones > [Zone] > Values > Initialization Values node.
Field Stencil
Specifies the mesh stencil (either Vertex, Face, or Cell) to which Simcenter STAR-CCM+ maps the imported field data.
Field Treatment
  • Managed: at the coupled boundaries, Simcenter STAR-CCM+ automatically defines morpher settings using the imported solid displacement:
    Imported Field Wall Boundary Conditions and Values
    Displacement If the morpher is active on the fluid region:
    Morpher Specification
    Set to Displacement.
    Morpher Displacement Specification
    Set to Total.
    Morpher Total Linear Displacement
    Set to Interoperability, which indicates that the boundary value is automatically set using imported data.

    This option is only available when the fluid region has morphing motion and the fluid continuum contains the Co-Simulation Mechanical Treatment model.

  • Unmanaged: Simcenter STAR-CCM+ does not use the imported data to set boundary conditions. You are responsible for setting all boundary conditions manually, using the field functions that store the imported data.
Scalar/Vector Function
Displays the field function that stores the imported field. Read-only.