Recirculating Flow in Oscillatory U-Tubes
This article has a reply.
VIEW THE REPLYPublication: Journal of Hydraulic Engineering
Volume 131, Issue 5
Abstract
Wastewater treatment facilities often experience undesirable oscillations in water surface elevations due to the potential of unsteady outlet flow. Self-induced oscillations, particularly those generated by the geometry and flow conditions of treatment facilities with a U-tube component, are of particular interest. This study focuses on the U-tube component of an existing wastewater treatment facility where oscillations of constant amplitude and period were observed shortly after the facility was operational. It is assumed that an oscillating U-tube manometer represents this problem, and a numerical model was developed to predict the amplitude and period of the oscillations using Newton’s second law of motion and momentum analysis. A 1-to-4.88-scale physical model of the existing facility was constructed and tested. Numerical model results show good agreement with measured oscillatory characteristics of the existing facility and the physical model.
Get full access to this article
View all available purchase options and get full access to this article.
References
Biery, J. C. (1963). “Numerical and experimental study of damped oscillating manometers: I. Newtonian fluids.” AIChE J., 9(5), 606–614.
Biery, J. C. (1969). “The oscillating manometer: A review of experimental, theoretical, and computational results.” AIChE J., 15(4), 631–634.
Bird, R. B., Stewart, W. E., and Lightfoot, E. N. (1960). Transport phenomena, 1st Ed., Wiley, New York, 229–231.
Brunhold, C. R., Hunns, J. C. B., Mackley, M. R., and Thompson, J. W. (1989). “Experimental observations on flow patterns and energy losses for oscillatory flow in ducts containing sharp edges.” Chem. Eng. Sci., 44(5), 1227–1244.
Jeppson, R. (1994). AP fluid mechanics course notes, Utah State University, 254–269.
Okamoto, K., Madarame, H., and Hagiwara, T. (1993). “Self-induced manometer oscillation of free surface caused by circulating flow.” JSME Int. J., Ser. C, 36(2), 171–176.
Richardson, P. D. (1967). “Free oscillations of fluids in manometers.” AIChE J., 13(4), 821–823.
Streeter, V. L. (1958). Fluid mechanics, 2nd Ed., McGraw-Hill, New York, 83–361.
Ury, J. F. (1962). “Viscous damping in oscillating liquid columns, its magnitude and limits.” Int. J. Mech. Sci., 4, 349–369.
Von Karman, T., and Valensi, J. (1948). Competes Rendus, 227, 105.
Wang, X., Lambert, M., Simpson, A., Liggett, J., and Vitkovsky, J. (2002). “Leak detection in pipelines using the damping of fluid tansients.” J. Hydraul. Eng., 128(7), 697–711.
Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 131 • Issue 5 • May 2005
Pages: 397 - 403
Copyright
© 2005 ASCE.
History
Received: May 6, 2003
Accepted: Sep 13, 2004
Published online: May 1, 2005
Published in print: May 2005
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.