Venturi effect
An atomizer nozzle can take many forms. The first atomizer nozzle, also called an aspirator nozzle, was invented by Dr. Thomas DeVilbliss of Toledo, Ohio, in the late 19th century for producing a fine spray of a liquid based on the Venturi effect. His device was used for spraying medicine on the back of his patients' throats. Atomizer nozzles can create atomization from a variety of mechanical means, which includes but is not limited to electrostatics processes, ultrasonic nozzle and centrifugal forces.