|
|
Code Number: 2C10.30
Demo Title: Falling Water Stream
Condition: Good
Principle: Bernoulli's Principle
Area of Study: Fluids
Equipment:
Old fashioned faucet, 0-150 VDC power supply, water pump on electric motor, bucket of water, and stand for bucket, and plastic wash tub,e, A length of 1/2 inch diameter Tygon tubing.
Procedure:
Turn on the water pump to a speed where water flows smoothly out of the faucet. NOTE: all the air needs to be out of the line for this to work properly. Adjust the speed so that the water flows smoothly and constricts as it falls downward.
In the lecture rooms you can just use a length of the 1/2 inch diameter Tygon tubing connected to the water faucet in the sink for this demo.
References:
- A. Tan, "The Shape of Streamlined Tap Water Flow", TPT, Vol. 23, # 8, Nov. 1985, p. 494.
- Wout M. Goesaert, Paul S. W. M. Logman, "Easy Method to Establish the Dispersion Relation of Capillary Waves on Water Jets", AJP, Vol. 92, #2, Feb. 2024, p. 93.
- Vladimir Grubelnik, Marko Marhl, "Drop Formation In A Falling Stream of Liquid", AJP, Vol. 73, # 5, May 2005, p. 415.
- D. L. Mordue, "A Measure of g?", AJP, Vol. 39, #10, Oct. 1971, p. 1266.
- 4.19: Jearl Walker, "Bernoulli Effect", The Flying Circus of Physics with Answers, p. 80 & 253.
- 6.7: Robert Ehrlich, "Narrowing of a Descending Water Stream", Why Toast Lands Jelly-Side Down, p. 107.
- Julius Sumner Miller, Q59 & A59, Millergrams I – Some Enchanting Questions for Enquiring Minds, p. 41 & 97.