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RESEARCH PAPERS

Switching Phenomenon of a Bathtub Vortex

[+] Author and Article Information
M. Shiraishi

Faculty of Engineering, Ibaraki University, 4-12-1 Nakanarusawa-Machi, Hitachi 316, Japan

T. Sato

NTT Japan Cable Co., Ltd., 2-3-1 Ote-Machi, Chiyoda-Ku, Tokyo 100, Japan

J. Appl. Mech 61(4), 850-854 (Dec 01, 1994) (5 pages) doi:10.1115/1.2901567 History: Received September 17, 1992; Revised April 22, 1993; Online March 31, 2008

Abstract

Switching phenomenon of the bathtub vortex in a double-orifice water tank is experimentally investigated. This alternation between “vortexflow” and “nonvortex flow” is caused by flow rate differences through the two orifices. The oscillation frequency is experimentally examined by changing the design parameters, such as the orifice size, the distance between two orifices, and the fluid level. A linear relationship is obtained between the frequency and the flow rate difference.

Copyright © 1994 by The American Society of Mechanical Engineers
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