Defining a Porous Baffle

You can specify a porous baffle between two surfaces in your model to simulate the pressure and temperature drop between the surfaces.

See Also
About Porous Baffles
In Other Guides
Editing Simulation Features
  1. From the Contacts section of the action bar, click Porous Baffle .
  2. Optional: Enter a descriptive Name.
  3. 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.

  4. 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.
  5. From the Contact search parameters, specify the default Angle Tolerance for contact.
  6. Specify the pressure drop behavior in terms of Viscous Resistance and the Inertial Resistance across the baffle.
  7. Specify the temperature drop behavior across the baffle in terms of the Porosity of the baffle and Thermal Resistance across it. You can express porosity as a value 0–1; lower numbers indicate denser baffles with fewer pores.
  8. Click OK.