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ERIC Number: EJ1045720
Record Type: Journal
Publication Date: 2014-Nov
Pages: 5
Abstractor: As Provided
Reference Count: 12
ISSN: ISSN-0031-921X
Towards Explaining the Water Siphon
Jumper, William D.; Stanchev, Boris
Physics Teacher, v52 n8 p474-478 Nov 2014
Many high school and introductory college physics courses cover topics in fluidics through the Bernoulli and Poiseuille equations, and consequently one might think that siphons should present an excellent opportunity to engage students in various laboratory measurement exercises incorporating these fascinating devices. However, the flow rates (or average exit velocities) of simple water siphons have not been sufficiently explained, nor has an associated analytical model been developed demonstrating sufficient experimental correspondence to allow physics instructors to bring closure between theoretical concepts and laboratory experiences. We present such an explanation and analytical model for the flow rates of simple water tube siphons. Further, we report measurements that show the model gives good correspondence to flow rates of siphons over a wide range of tube lengths, inner diameters, and water heights (hydrostatic head), and for which the Reynolds numbers range from 10[superscript 2] to 10[superscript 5].
American Association of Physics Teachers. One Physics Ellipse, College Park, MD 20740. Tel: 301-209-3300; Fax: 301-209-0845; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Secondary Education; Higher Education; Postsecondary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A