Extra Dimension Selection
Use the Extra Dimension Selection node () to add selections to an extra dimension for the connection to an ordinary space-dimension part of the model.
To add a Extra Dimension Selection, under Definitions Library right-click the Selections node () and choose it from the context menu.
Selection
See Specifying Selections for information.
Source Extra Dimension
Choose an option from the Specify extra dimension list: By reference (the default), By tag suffix, or From parent. For By reference, select an option from the Links from and Link lists. For By tag suffix, enter a Tag suffix.
Selection on Extra-Dimensional Geometry
Select a Type: Predefined, User defined, or From definitions library.
For Predefined, select an existing predefined selection from the Selection list.
For User defined, choose an Entity dimension: Domain or Boundary. From the Entities list, choose Specified or whether All entities are used. For Specified enter the Entity indices in the text field.
For From definitions library, select an existing selection from the Definitions library.
Using Extra Dimensions in the COMSOL Multiphysics Reference Manual