In rotary atomization , the feed liquid is centrifugally accelerated to high velocity before being discharged in to an air-gas atmosphere. The Liquid is distributed centrally on the wheel/disc/cup. The liquid extends over the rotating surface as a thin film. Rotary atomization is often termed centrifugal atomization, but this can be a little misleading as centrifugal energy is also utilized to a certain degree in centrifugal pressure nozzles, where liquid is given rotational motion.