A reduction in inlet velocity V .

From the inlet velocity triangle:

The air in a cyclone is initially introduced tangentially into the cyclone with an inlet velocity .

As both propeller and fan blades must operate at subsonic inlet velocities to be efficient, ducted fans allow efficient operation at higher vehicle speeds.

There can be "stratification-enhancing"-devices within the hot water storage tank, but if it the water inlet velocity is as low as possible this might not be needed.

Turbines are sometimes differentiated on the basis of the type of inlet flow, whether the inlet velocity is in axial direction, radial direction or a combination of both.

Francis turbine is a mixed hydraulic turbine (the inlet velocity has Radial and Tangential Components) while the Kaplan turbine is a Axial hydraulic turbine(the inlet velocity has only Axial Velocity Component).