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.
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.
From the Model section of the Assistant, click Fluid Domain
.
Group the tubes into a single feature so that you can quickly select them
later.
Click in the Surface
Selections section.
Name the surface selection Tube Bundle.
Select the outer face of every tube.
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.