Symmetry (Heat Transfer interface)
This node provides a boundary condition for symmetry boundaries. This boundary condition is similar to a Thermal Insulation condition, and it means that there is no heat flux across the boundary.
The symmetry condition only applies to the temperature field. It has no effect on the radiosity (surface-to-surface radiation) and on the radiative intensity (radiation in participating media). Use Symmetry for Surface-to-Surface Radiation to account for the symmetry in the computation of the view factors.
Heat Generation in a Disc Brake: Application Library path Heat_Transfer_Module/Thermal_Contact_and_Friction/brake_disc
Location in User Interface
Context menus
 Heat Transfer>Symmetry
Heat Transfer in Solids>Symmetry
Heat Transfer in Fluids>Symmetry
Heat Transfer in Porous Media>Symmetry
Bioheat Transfer>Symmetry
Ribbon
Physics Tab with interface as Heat Transfer, Heat Transfer in Solids, Heat Transfer in Fluids, Heat Transfer in Porous Media, Heat Transfer in Building Materials or Bioheat Transfer selected:
Boundaries>interface>Symmetry