Create a Surface Definition

Group the outer surfaces of all the tubes into a single surface definition.

You can select multiple surfaces to group them in a surface definition. The surface definition allows for quick selection of the surface, which is particularly useful when creating features and analyzing the results of a simulation.

In this example, you edit the fluid domain created in the previous step by adding a surface definition for the tubes inside the heat exchanger. You use this surface definition later to help you create other simulation features.

  1. From the tree, expand Model > Heat Exchanger A.1, right-click Shell A.1, and click Hide/Show to hide the heat exchanger's shell.
  2. From the Model section of the Assistant, click Fluid Domain .
  3. Group the tubes into a single feature so that you can quickly select them later.
    1. Click in the Surface Selections section.
    2. Name the surface selection Tube Bundle.
    3. Select the outer face of every tube.


    4. Select the Regions field, and then select the blue cube glyph in the 3D area.

      Tip: You can also expand Model > Heat Exchanger A.1 > Coolant Mesh A.1 > Abstractions > Physical Environment.1 > Fluid Cavities.1 in the tree and select Region.1.

    5. Click OK.
  4. Click OK.