The Symmetry node adds boundary conditions that describe symmetry boundaries in fluid-flow simulations. The boundary condition for symmetry boundaries prescribes no penetration and vanishing tangential stress:
For the symmetry axis at r = 0, the program automatically provides a condition that prescribes
ur = 0 and vanishing stresses in the
z direction and adds an
Axial Symmetry node that is valid on the axial symmetry boundaries only.