Activating Fluid Exchange for a Simulation

You can activate one or more fluid exchange definitions to simulate the effects of fluids moving between fluid cavities or between one fluid cavity and the environment.

Before you begin:
  • Define one or more fluid cavities in the model.
  • Define fluid exchange behaviors for the fluid cavities.
See Also
About Fluid Exchange Activation
  1. From the Interactions section of the action bar, click Fluid Exchange Activation .
  2. Optional: Enter a descriptive Name.
  3. Specify the Fluid exchange definitions you want to activate by clicking them from the tree.
  4. Select Blockage to consider vent and leakage area obstruction by contacted surfaces.
  5. Select Outflow only to simulate flow from the first fluid cavity to the second fluid cavity only (or from the fluid cavity to the environment only), or clear this option to simulate fluid flow in both directions.
  6. Specify the Leakage area ratio, which is the ratio of the actual surface area over the initial surface area at which you want the fluid to leak.

    This real value should be positive and greater than or equal to one. The effective surface area used for the fluid exchange is the difference between the actual area of the surface and the area of the surface at the beginning of step.

  7. Optional: Specify an Amplitude to vary the magnitude of the fluid exchange as the step proceeds.

    The amplitude curve defines the magnitude of the fluid exchange during the step.

  8. Click OK.