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.
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.
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.
) and select Advanced Physics Options in the Show More Options dialog box. 
