Interior Normal Velocity
The Interior Normal Velocity node adds a normal velocity on an interior boundary and ensures that the pressure is noncontinuous here. Add this node from the Interior Conditions submenu. The pressure has a slit condition on this boundary. The condition is very similar to the Interior Normal Acceleration condition, simply having the acceleration given by iω times the velocity.
Interior Normal Velocity
Select a Type: Velocity (the default) or Normal velocity.
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For Velocity enter values for the components of the Velocity v0 (SI unit: m/s2).
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For Normal velocity enter the value of the Normal velocity vn (SI unit: m/s2) in the normal direction. The normal is depicted as a red arrow in the graphics window on the selected boundary.