Demonstrations

Bernoulli's Principle - Venturi Tubes

Code Number :	2C20.10
Disclaimer:	Reprinted by permission of Dick Berg, University of Maryland, for use on this website. The demonstrations contained and referenced herein are listed for the purposes of cataloging and describing physics demonstrations which should be conducted only under the direction of a trained instructional support professional or physicist. These demonstrations are not presented for the purpose of being conducted by persons unconnected to this Facility and/or persons not consulting with or being supervised by the recognized instructional support professional or physicist and his/her staff. The University is responsible only for those demonstrations carried out using its own equipment using established safety and scheduling policies, and bears no responsibility for those choosing to use this source material for their own purposes. All demonstrations described and contained herein are public domain, and can also be found in reference materials in libraries, bookstores, and electronic sources. Further information regarding legal liability in use of demonstrations and labs will be found on the web site Injuries in School/College Laboratories in USA. The University of Iowa Disclaimers: University of Iowa Disclaimer All Rights Reserved..
Condition :	Good
Principle :	Bernoulli's Principle
Area of Study :	Heat & Fluids
Equipment :	Venturi tubes, Plastic hose.
Procedure :	The Venturi tube demos may need to have water added to them. A disposable syringe with a long curved or bent needle seems to work the best. Too much air pressure will draw the water up far enough that it will be blown out the other side.

References

Nathaniel R. Greene and Matthew R. Dworsak, "Bernoulli at the Gas Pump," TPT, Vol. 39, # 9, p. 346-348, (Sept. 2001).

"Figuring Physics", TPT, Vol. 38, # 7, Oct. 2000, p. 437.

Brian W. Holmes, "My Teacher is a Blowhard," TPT, Vol. 34, # 6, p. 362, Sept. 1996.

Bruce D. Bedford, "The Flying Controversy", TPT, Vol. 33, # 6, Sept. 1995, p. 324.

Robert P. Bauman, " The Author Replies," TPT, Vol. 33, # 6, p. 325, Sept. 1995.

"Robert Bauman and Rolf Schawaneberg, "Interpretation of Bernoulli's Equation", TPT, Vol. 32, # 8, Nov. 1994, p. 478.

Henry S. Badeer and Costas E. Synolakis, "The Bernoullie-Poiseuille Equation," TPT, Vol. 27, # 8, p. 598, (November 1989).

A. Sieradzan and W. Chaffee, "Bernoulli Revisited: A Simple Demonstration," TPT, Vol. 27, # 4, p. 306, (April 1989).

Norman F. Smith, "Bernoulli and Newton in Fluid Mechanics", TPT, Vol. 10, # 8, Nov. 1972, p. 451.

Robert P. Bauman, "An Alternative Derivation of Bernoulli's Principle", AJP, Vol. 68, # 3, p. 288, March 2000.

Klaus Weltner, "A Comparison of Explanations of the Aerodynamic Lifting Force," AJP, 55, (1), January 1987.

Fj-1: Freier and Anderson, A Demonstration Handbook for Physics.

F- 210: "Constriction of Air Flow," DICK and RAE Physics Demo Notebook.

M- 294: Richard Manliffe Sutton, Demonstration Experiments in Physics.

Jearl Walker, "Why a Fluid Flows Faster When the Tube Is Pinched," The Amateur Scientist, (July, 1987).

Neil A. Downie, "17: Bernoulli's Clock," Vacuum Bazookas, Electric Rainbow Jelly and 27 Other Saturday Science Projects, p. 142.

John Welch, "Abstract: Pressure in Air Stream", 2005 Apparatus Competition, Salt Lake City, UT.

Mail Questions and Comments to: Dale Stille