Defining a Solid Interface

You can define a solid interface to enable the interaction of the fluid with solid bodies.

See Also
Modifying Automatic Solid Interface
In Other Guides
Editing Simulation Features
Support Selection
  1. From the Contact section of the action bar, click Solid Interface .
  2. Optional: Enter a descriptive Name.
  3. Optional: Select Exclude from global contact to exclude the selected surfaces or regions from the global contact behavior for the simulation if Auto Solid Interface already exists.
  4. From the Support type options, select one of the following to specify how to define the solid interface:
    OptionDescription
    Auto Detect the contact automatically between all parts and regions in the model.
    Surface Detect the contact only between the specified pair of surfaces.
    Region Detect the contact only between the specified pair of regions.
  5. If you chose Surface or Region as the support type, select the two surfaces or regions for which you want to couple the solid and flow physics.

    Tip: When the contacting surfaces are difficult to discern, you can render all surfaces translucent except for those surfaces that contact each other.
    • Click green to render all parts translucent except for parts associated with the first surface or region.
    • Click magenta to render all parts translucent except for parts associated with the second surface or region.

  6. From the Contact search parameters, specify the distance-based tolerance for contact by selecting one of the following choices from the Tolerance Type options:
    OptionDescription
    Absolute Specify tolerance as an absolute distance, then enter the distance in the Normal Tolerance field.
    Relative Specify tolerance relative to the typical mesh element size, then enter the relative size as a decimal in the Normal Tolerance field.
  7. From the Contact search parameters, specify the default Angle Tolerance for contact.
  8. Optional: When thermal effects are enabled, specify the Thermal resistance of unit area at the interface of the surfaces or regions.
  9. Optional: When the computation of electric potential is enabled for solid physics regions, specify the Electrical resistance at the interface of the selected surfaces or regions.
  10. Click OK.