Symmetry
The Symmetry node adds an edge (3D), boundary (2D), or point (2D and 3D) condition that defines a symmetry edge, boundary, or point.
Coordinate System Selection
The Global coordinate system is selected by default. The Coordinate system list contains any additional coordinate systems that the model includes. The coordinate system is used in conjunction with the Axis to use as normal direction setting.
Symmetry
Select an Axis to use as normal direction. This specifies the direction of the normal to the symmetry plane. Select 1, 2, or 3 for the first, second, or third axis in the selected coordinate system.
Constraint Settings
To display this section, click the Show button () and select Advanced Physics Options.
In the COMSOL Multiphysics Reference Manual:
Location in User Interface
Context Menus
Truss>Line Constraints>Symmetry (Line)
Truss>More Constraints>Symmetry (Point)
Ribbon
Physics tab with Truss selected:
Edges>Line Constraints>Symmetry
Points>More Constraints>Symmetry