Using Boolean and Adjacent Selections in COMSOL Multiphysics®

Duration: 9:31

When setting up your simulation, you can use selections to represent different parts of your geometry. This can be helpful in many instances, such as when you are specifying materials, applying boundary conditions, customizing the mesh, and more.

In COMSOL Multiphysics®, using Boolean and adjacent selections, you can create customized groups of geometric entities that update automatically when you change your model geometry. All of the following selection types use previously defined selections as input.

Boolean selections include:

  • Complement selections — create selections that are the inverse of one or more selections

  • Difference selections — create selections of entities that are in one selection, but not another

  • Union selections — combine two or more selections into a single one

  • Intersection selections — create selections of entities contained in all input selections

If you want to create selections of geometric entities that are touching other selections, use adjacent selections. You also have the option to select exterior or interior entities with this selection type.

Chapter Selection

Introduction (0:00) Model Overview (1:04) Complement Selection (2:07) Adjacent Selection (2:48) Difference Selection (4:59) Union Selection (6:24) Intersection Selection (6:55)