Antisymmetry
The Antisymmetry node adds a boundary condition for an antisymmetry boundary. An antisymmetry condition is fixed in the plane and free in the out-of-plane direction. The antisymmetry plane is formed by the normal to the boundary and the edge tangent.
Coordinate System Selection
Specify the coordinate system to use for specifying a symmetry edge. From the Coordinate system list select from:
Local edge system (the default).
Global coordinate system (the standard global coordinate system).
Face Defining the Local Orientations
This section is only shown if the Local Edge System is chosen in the Coordinate System Selection. If symmetry is prescribed for an edge which is shared between boundaries, the edge system can be ambiguous. Select the boundary which should define the edge system. The default is Use face with lowest number.
Antisymmetry
If another coordinate system than the Local edge system is used, select an Axis to use as symmetry plane normal. Select 1, 2, or 3 for the first, second, or third axis, respectively.
Constraint Settings
To display this section, click the Show More Options button () and select Advanced Physics Options in the Show More Options dialog box.
In the COMSOL Multiphysics Reference Manual:
Location in User Interface
Context Menus
Ribbon
Physics tab with Membrane selected: