Creating Interfaces

Simcenter STAR-CCM+ requires the existence of interfaces between different regions to transfer the appropriate physical quantities during the calculation.

For this example, you create a contact-type interface between the fluid and solid regions. This involves creating a so-called “in-place interface” between the wall boundaries enclosing each of the two regions, and then defining this interface as being of an appropriate “contact” type for fluid-solid heat transfer.
  1. Using the multi-select method, select the following nodes:
    • Regions > Fluid > Boundaries > top-solid1
    • Regions > Solid > Boundaries > top-solid1
  2. Right-click and select Create Interface.

    The previous step creates the following new nodes:

    • Fluid > Boundaries > top-solid1 [Interface 1]
    • Solid > Boundaries > top-solid1 [Interface 1]

    These boundaries form the connection between the fluid and solid regions once the flow initialization step has been performed and supersede the original wall boundaries forming the connection.

  3. Select the following nodes:
    • Regions > Fluid > Boundaries > bottom-solid1
    • Regions > Solid > Boundaries > bottom-solid1
  4. Right-click and select Create Interface.
  5. Select the following nodes:
    • Regions > Fluid > Boundaries > top-solid2
    • Regions > Solid > Boundaries > top-solid2
  6. Right-click and select Create Interface.
  7. Select the following nodes:
    • Regions > Fluid > Boundaries > bottom-solid2
    • Regions > Solid > Boundaries > bottom-solid2
  8. Right-click and select Create Interface.
    In addition to the new in-place boundaries, a folder node named Interfaces appears in the object tree. Within it, four interface nodes that are called Interface 1 to Interface 4 are created.
  9. Save the simulation.