Rigid Wall
The Rigid Wall condition is used to model a rigid wall, corresponding to the sound hard wall condition in Pressure Acoustics. In the case of lossless flows, this reduces to the slip condition ut ⋅ n = 0, where n is the surface normal. Add this node from the Wall Conditions submenu.
Constraint Settings
To display this section, click the Show More Options button () and select Advanced Physics Options in the Show More Options dialog.
On highly curved surfaces, it may be necessary to switch the Constraint method from the default Elemental to Nodal in order to avoid locking effects.
Excluded Edges/Points
To display this section, click the Show More Options button () and select Advanced Physics Options in the Show More Options dialog. See Suppressing Constraints on Lower Dimensions for details.
For systems with a trailing edge on an airfoil or with an edge singularity between a liner and a rigid wall, the exclude edges and points functionality can be used to set up an appropriate Kutta condition. See Suppressing Constraints on Lower Dimensions.