Velocity
Use the Velocity node to define the prescribed velocities u0 on the boundary: 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 button () and select Advanced Physics Options.