Exchanged Fields Reference

You specify exported and imported fields using predefined fields or auxiliary fields.

Exported Fields/Imported Fields Node Right-Click Actions

The Exported Fields node and the Imported Fields node appear in two locations:
  • under co-simulation zones:

    External Links > [Link] > Zones > [Zone] > Conditions > Exported Fields, Imported Fields

  • under the link:

    External Links > [Link] > Conditions > Exported Fields, Imported Fields

Add Flow Field
Only available in co-simulation zones.
Allows you to select a predefined flow field for export or import. The available fields are:
  • Mass Flow: available as exported field for pressure outlet boundaries, and as imported field for velocity inlet and mass flow inlet boundaries.
  • Pressure: available as exported field for velocity inlet and mass flow inlet boundaries, and as imported field for pressure outlet boundaries.

    Simcenter STAR-CCM+ exchanges relative pressure. For consistency, the reference pressure specified in Simcenter STAR-CCM+ must match the reference pressure in Simcenter Amesim.

Add Auxiliary Field
Allows you to add a scalar auxiliary field, for export or import of any single-value field function. See Specifying Co-Simulation Settings in Simcenter STAR-CCM+.

[Exported Field] Properties

The field nodes under the Exported Fields node have the following properties:

Initialization Method
  • For fields that are exported using co-simulation zones, this property is automatically set to User-defined Initialization Value. Specify an initialization value under the Zones > [Zone] > Values > Initialization Values node.
  • For single values that are not exported under a zone, this property is automatically set to Constant Value. No action is required.
Field Stencil
  • For fields that are exported using co-simulation zones, this property specifies the stencil on the coupled boundaries mesh (either Vertex, Face, or Cell), 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.

  • For single values that are not exported under a zone, this property is automatically set to Single Value.
Field Treatment
  • For predefined fields that are exported using co-simulation zones, this property is automatically set to Managed. This setting indicates that Simcenter STAR-CCM+ automatically averages the fields to the single-value data required by Simcenter Amesim before export.
  • For auxiliary fields or single values that are not exported under a zone, this property is automatically set to Unmanaged. This setting indicates that Simcenter STAR-CCM+ does not perform any operation on the fields before export. Therefore, make sure that you export single-value quantities such as reports.
Scalar Function
Allows you to select the field functions that are exported to the partner simulation. For each exported field, Simcenter STAR-CCM+ also adds two additional field functions:
  • Simcenter Amesim Port #, which corresponds to the data exported to Simcenter Amesim port # at the current time-step.
  • Simcenter Amesim Port # Previous Step, which corresponds to the data exported to Simcenter Amesim port # at the previous time-step.

[Imported Field] Properties

Initialization Method
  • For fields that are exported using co-simulation zones, this property is automatically set to User-defined Initialization Value. Specify an initialization value under the Zones > [Zone] > Values > Initialization Values node.
  • For single values that are not exported under a zone, this property is automatically set to Constant Value. No action is required.
Field Stencil
  • For fields that are imported using co-simulation zones, this property specifies the stencil on the coupled boundaries mesh (either Vertex, Face, or Cell), to which Simcenter STAR-CCM+ maps the imported field data.
  • For single values that are not exported under a zone, this property is automatically set to Single Value.
Field Treatment
  • Managed:

    Only available for predefined fields (mass flow and pressure). This option is not available for auxiliary fields. Simcenter STAR-CCM+ automatically applies the imported field to the coupled boundaries, setting the relevant boundary conditions and values as follows:

    Imported Field Wall Boundary Conditions and Values
    Mass Flow Depending on the boundary type, either:
    Mass Flow Rate
    Set to Interoperability, which indicates that the boundary value is automatically set using imported data.

    or:

    Velocity Magnitude
    Set to Interoperability.
    Pressure
    Pressure
    Set to Interoperability.
  • Unmanaged

    You are responsible for setting all boundary conditions manually, using the field functions that store the imported data.

Scalar Function
Displays the field functions that store the data imported with this field. For each imported field, Simcenter STAR-CCM+ adds two field functions:
  • Simcenter Amesim Port #, which corresponds to the data imported from Simcenter Amesim port # at the current time-step.
  • Simcenter Amesim Port # Previous Step, which corresponds to the data imported from Simcenter Amesim port # during the previous time-step