Symmetry
The Symmetry node describes a symmetry boundary. The following condition implements the symmetry condition on an axis or a flow divide:
For axisymmetric components, COMSOL Multiphysics takes the axial symmetry boundaries (at r = 0) into account and automatically adds an Axial Symmetry node that is valid on the axial symmetry boundaries only.
Location in User Interface
Context Menus
Ribbon
Physics tab with interface as Darcy’s Law or Richards’ Equation selected: