Defining a Fluid Interface

You can use a fluid interface to couple two fluids together and allow flow to go from one fluid to another through the interface. A fluid interface is created automatically when porous media is present in your simulation.

See Also
About Fluid Interfaces
In Other Guides
Editing Simulation Features
  1. From the Contacts section of the action bar, click Fluid Interface .
  2. Optional: Enter a descriptive Name.
  3. From the Support type options, specify whether your fluid interface is defined by surfaces, regions or automatic detection.
    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.
  4. If you choose Surface as support type, you need to select the Upstream surface and Downstream surface that represent the two sides of the interface.

    Tip: Click to change the side of the surface you select.

  5. If you choose Region as support type, you need to select two regions that represent the two sides of the interface.
  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. Click OK.