2C20.30 - Coanda Effect - Ball in Air Stream

See paragraph two in the procedure section
Code Number:
Demo Title:
Coanda Effect - Ball in Air Stream
Bernoulli's Principle
Area of Study:
Heat & Fluids
Long metal tube with air jet holes, Air hose for long metal tube, Ping Pong Balls, vacuum blower, and 9" beach ball.

The air pressure is the critical factor here and will have to be regulated.  

Turn the vacuum blower onto low pressure and hold the nozzle so that it is upright.  Float the beach ball in the air stream and when the beach ball quits oscillating you should be able to turn the nozzle slowly to a 45 degree angle without the beach ball falling out of the stream.

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Disclaimer: These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist.  The University of Iowa is not responsible for demonstrations performed by those using their own equipment or who choose to use this reference material for their own purpose.  The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources.  Performing all or any portion of any of these demonstrations, with or without revisions not depicted here entails inherent risks.  These risks include, without limitation, bodily injury (and possibly death), including risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition; and property loss or damage.  Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.