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based on a non-contact, non-impingement technology. The operating principle behind the Disc Pump is boundary layer-viscous drag. Its application to pumps commercially is new, but it has been used widely in fluid engineering for over 100 years. A common example of this principle is the phenomenon of pressure drop or friction losses through a pipe system.
Examination of the cross-section of a pipe under laminar (non-turbulent) flow conditions shows that layers of liquid travel at different velocities. The stationary pipe exerts a ‘drag’ force on the flowing liquid. The velocity of the layer adjacent to the pipe is zero, an effect known as ‘boundary layer’. Successive latyers flow increasingly fast with the highest velocities at the center point between the pipe walls.
