The Interior Wall boundary condition is used to model a wall condition on an interior boundary. It is, similarly to the
Wall boundary condition, available on exterior boundaries except that it applies on both sides (up and down) of an internal boundary. It allows discontinuities (in pressure, velocity, and temperature) across the boundary. Use the
Interior Wall boundary condition to avoid meshing thin structures by applying this slit-like condition on interior curves and surfaces instead. Add this node from the
Interior Conditions submenu.
Select a Mechanical condition —
No slip (the default) or
Slip (perfect). See the
No Slip and
Slip (Perfect) conditions for further details.
Select a Thermal condition —
Isothermal (the default) or
Adiabatic. See the
Isothermal and
Adiabatic conditions for further details.
If Slip (perfect) is selected for the
Mechanical condition and
Weak constraints is selected as
Constraint, the default Nitsche (penalty like) formulation is switched to a Lagrange multiplier formulation instead. For the
No-slip and
Isothermal selections a weak formulation is used instead of a pointwise constraint.
) and select Advanced Physics Options in the Show More Options dialog box.
) and select Advanced Physics Options in the Show More Options dialog box. See Suppressing Constraints on Lower Dimensions for details.