Interior Normal Velocity
The Interior Normal Velocity node adds a normal velocity on an interior boundary and ensures that the pressure is noncontinuous. Add this node from the Interior Conditions submenu. The pressure has a so-called slit condition on this boundary. The condition is very similar to the Interior Normal Acceleration condition having the acceleration given by the time derivative of the velocity.
Interior Normal Velocity
Select a Type: Velocity (the default) or Nromal 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.