Normal Velocity
The Normal Velocity condition adds a source specified in terms of an inward normal velocity vn(t) or velocity v0(t) of the boundary. The component in the normal direction is used to define the boundary condition. This feature represents an external source term like a vibrating surface. The condition is also available from the Pairs submenu, as an option at interfaces between parts in an assembly. This effectively introduces a condition similar to the Interior Normal Velocity but used on an assembly.
Normal velocity
Select a Type: Inward Velocity (the default) or Velocity.
•
For Inward Velocity enter the value of the Inward velocity vn (SI unit: m/s).
•
For Velocity enter values for the components of the Velocity v0 (SI unit: m/s).
If the Use accelerated solver formulation option is selected in Model Equations and Solver Settings section, the source has to be split into its spatial and temporal components so that the inward velocity is −vn(x) l(t). Enter an expression for the (space-dependent) Inward velocity vn(x) (or the Velocity) and the time-dependent Load factor l(t).