Paraboloids and Vortices

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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.

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Condition :   Good  

 

Principle :   Turbulence and Vortex  
Area of Study :  Heat & Fluids   
Equipment :   Platform with rotating cylinder and variable speed motor.

Procedure :   Fill the cylinder with colored water to a depth of 4 or 5 cm.  Start the apparatus rotating and then watch the parabola that forms at various rotation rates.  NOTE:  The speed control for the motor is real sensitive so be careful or you will rotate the cylinder too fast and the water will spill out.
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   Web Sites
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© 1997-2002 Brian Carusella All rights reserved.
 

 

   References

Hugo Graumann and Hans Laue,  "Concave Liquid-Mirror Experiments,"  TPT, Vol. 36, # 1, p. 28, (Jan. 1998).

Erlend H. Graf, "Apparatus for the Study of Uniform Circular Motion in a Liquid", TPT, Vol. 35, # 7, Oct. 1997, p. 427.

Channon P. Price, "Teacup Physics: Centripetal Acceleration", TPT, Vol. 28, # 1, Jan. 1990, p. 49.

Roy Euclide and Scott Welty, "Steam Engine Efficiency", TPT, Vol. 24, # 5, May 1986, p. 308. 

Jack Grube, " Centripetal Force and Parabolic Surfaces", TPT, Vol. 11, # 2, Feb. 1973, p. 109.

Jeffrey M. Cohen and Mario D. Cohen, "Mach's Principle and General Relativity", TPT, Vol. 7, # 4, April 1969, p. 241.

 

Richard E. Berg,  "Rotating Liquid Mirror,"  AJP, 58, (3), March 1990.

R. Ian  Fletcher, "The Apparent Field of Gravity in a Rotating Fluid System", AJP, Vol. 40, # 7, July 1972, p. 959.

 

Robert Ehrlich,  "Spinning a Water-Filled Cylinder,"  Turning the World Inside Out, p. 66- 67.



Mail Questions and Comments to:  Dale Stille