Velocity
Use the Velocity node to define the prescribed velocities u0 on the boundary. Add this node from the Mechanical submenu. The condition reads ut = u0. This condition is useful, for example, when modeling a vibrating wall.
Velocity
To define a prescribed velocity for each space direction (x and y, plus z for 3D), select one or more of the Prescribed in x direction, Prescribed in y direction, and Prescribed in z direction check boxes. Then enter a value or expression for the prescribed velocities u0x, u0y, or u0z (SI unit: m/s).
To define a prescribed velocity for each space direction (r and z), select one or both of the Prescribed in r direction and Prescribed in z direction check boxes. Then enter a value or expression for the prescribed velocities u0r or u0z (SI unit: m/s).
Constraint Settings
To display this section, click the Show More Options button () and select Advanced Physics Options in the Show More Options dialog box. For the Velocity condition the Constraint method is set to Nodal.
Excluded Edges/Points
To display this section, click the Show More Options button () and select Advanced Physics Options in the Show More Options dialog box. See Suppressing Constraints on Lower Dimensions for details.