Regions Layout Workflow

In defining the regions layout you map between the geometrical definition of the problem and the computational (or physical) definition.

Make sure that you have all the geometry parts, and part contacts, that you require to implement the planned layout. If you have more than one region, and the regions are connected, then you must create interfaces in the region layout. Simcenter STAR-CCM+ can create boundary-based interfaces or parts-based interfaces automatically.
To create the region layout:
  1. If the region layout requires interfaces between adjoining regions, decide whether you are using boundary-based interfaces (one pair of boundaries per interface) or parts-based interfaces (multiple pairs of parts per interface).
  2. If you want to have one region for each geometry part, with boundary-based interfaces between regions, do the following steps:
    1. Within the Geometry > Parts node, select all the parts that you intend to use in regions.
    2. Right-click on one part and choose Assign Parts to Regions...
    3. In the Assign Parts to Regions dialog, in the lower part of the dialog, choose the following options:
      • Create a Region for Each Part
      • Create a Boundary for Each Part Surface
      • Select Create Boundary-mode Interfaces From Contacts
    4. Click Apply followed by Close.
  3. If you want to assign multiple parts to specific regions, with parts-based interfaces between regions, do the following steps. You Either create empty regions and assign geometry parts to them afterwards, or else select multiple geometry parts and create the regions automatically. Use actions from the table below.
    Action Instructions
    Create an empty region Right-click the Regions node and choose New.
    Assign a geometry part to an existing region Within Geometry > Parts, right-click the part that you want to assign and choose Set Region > Existing.... Select the region and click OK.
    Assign multiple geometry parts to an existing region
    1. Within Geometry > Parts, right-click one of the parts that you want to assign and choose Assign Parts to Regions...
    2. In the dialog, within the parts selection panel, select all the parts you want to assign.
    3. In the lower options panel, choose Assign All Parts to An Existing Region, click Select, and choose the target region.
    4. Select an appropriate option for boundaries.
    5. Select Create Contact-mode Interfaces From Contacts.
    6. Click Apply followed by Close.
    Automatically create a single region from one or more geometry parts
    1. Within Geometry > Parts, multi-select the parts that you want to assign to a new region.
    2. Right-click one of the parts and choose Set Region > New...
    3. Enter a name for the region and click OK.
  4. If you want to create an interface that couples two regions by volume, for either an overset mesh calculation or a heat exchanger:
    1. Within Regions, multi-select the two regions that define the interface.
    2. Right-click and select Create Interface followed by Heat Exchanger or Overset Mesh.
  5. If you want to create an interface between two boundaries, either in the same region or in different regions:
    1. Multi-select the two boundaries.
    2. Right-click and choose Create Interface.
  6. Set the interface type. For each interface in turn:
    1. Select the interface node and set Type to one of the available options.
  7. If, after creating the volume mesh, you wish to check the number of faces allocated to each interface:
    1. In the simulation tree, expand the Representations node.
    2. Navigate to the appropriate volume mesh, expand the region, and select the node that represents the side of the interface that belongs to the region.
    3. In the Properties window, review the number of Faces.