School of Physics Lecture Demonstration Manual

Fc-5 The Chimney effect (Atomiser Principle)

Published: Monday 13 March 2006 - Updated: Tuesday 29 March 2011


To Demonstrate how perpendicular airflow can create lift.



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The Chimney Effect (Atomiser Principle)

Chimney Effect Diagram


The Chimney Effect (Atomiser Principle)


A perspex tube (the chimney) is positioned above a beaker of rice bubbles or other appropriate light particles. The blower is aimed to provide a jet of air passing just above the chimney and at a slight angle to the horizontal. With a bit of practice the particles can be lifted completely up the tube and sprayed across the students. For best results the tube should be positioned about 1 mm above the level of the Rice bubbles. A spectacular demonstration.

Safety notes

Electrical safety


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