Normal Velocity
The Normal Velocity adds an inward normal velocity vn, which is assumed to be harmonically oscillating:
Alternatively, specify the acceleration v0 of the boundary. The part in the normal direction is used to define the boundary condition:
This feature represents an external source term. It can also be used to manually couple acoustics with a structural analysis for modeling acoustic-structure interaction.
Normal velocity
Select a Type: Inward Velocity (the default) or Velocity.
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For Inward Velocity enter the value of the Inward velocity vn (SI unit: m/s). Use a positive value for inward velocity or a negative value for outward velocity.
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For Velocity enter values for the components of the Velocity v0 (SI unit: m/s).