Negatively Buoyant Flow in a Diverging Channel. I: Flow Regimes
Publication: Journal of Hydraulic Engineering
Volume 113, Issue 6
Abstract
Negatively buoyant (plunging) flow entering a horizontal and diverging channel has been studied in the laboratory. Such flow is found at the heads of reservoirs and near effluent sites into lakes. Six flow regimes could be distinguished in the experiments. The flows are similar to nonbuoyant, twodimensional diffuser flow, but negative buoyancy adds several variations. The dependence of the flow regimes on the inflow channel aspect ratio, inflow densimetric Froude number, diffuser half‐angle, and channel‐to‐diffuser transition are presented. The experimental results can be used to predict if and where flow separation will occur and what flow regimes will be present.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Blevins, R. (1983). Applied fluid dynamics handbook. Van Nostrand Reinhold, Amsterdam, The Netherlands, pp. 144–155.
2.
Farrell, G. J., and Stefan, H. G. (1986). “Buoyancy induced plunging flow into reservoirs and coastal regions.” Project Report No. 241, St. Anthony Falls Hydr. Lab., Univ. of Minnesota, Jul., 252 pp.
3.
Hamel, G. (1916). “Spiralförmige bewegungen zäher flüssigkeiten,” Ber. Deutschen Math. Vereinigung 25(34).
4.
Jeffery, G. B. (1915). “Steady motion of a viscous fluid.” Phil. Mag.(6)29, p. 455.
5.
Johnson, T. R., Farrell, G. J., Ellis, C. R., and Stefan, H. G. (1985). “Negatively buoyant flow in a diverging channel,” Proceedings, ASCE Symposium on Hydraulics and Hydrology in the Small Computer Age, Aug.
6.
Johnson, T. R., Farrell, G. J., Ellis, C. R., and Stefan, H. G. (1986). “Experimental study of buoyancy induced plunging flows into reservoirs and coastal regions.” Project Report No. 245, St. Anthony Falls Hydr. Lab., Univ. of Minnesota.
7.
Johnson, T. R., Ellis, C. R., Farrell, G. J., and Stefan, H. G. (1987). “Negatively buoyant flow in a diverging channel. II: 3‐D flow field description.” J. Hydr. Engrg., ASCE, 113(6), pp. 731–742.
8.
Kline, S. J. (1959). “On the nature of stall.” J. Basic Engrg., Trans. ASME.Series D, Vol. 81, Sep., pp. 305–320.
9.
Nikuradse, J. (1929). “Untersuchungen über die strömungen des wassers in konvergenten and divergenten kanälen.” Forschungsarbeiten. VDI, 289 (as quoted in Schlichting, H. (1979). Boundary Layer Theory. 7th ed., McGraw Hill, New York, N.Y., pp. 668–670).
10.
Reneau, L. R., Johnston, J. P., and Kline, S. J. (1967). “Performance and design of straight, two‐dimensional diffusers.” J. Basic Engrg., 89, Mar., pp. 141–150.
11.
Rosenhead, L. (1940). “The steady two‐dimensional radial flow of viscous fluid between two inclined plane walls.” Proc. Royal Soc, Series A, p. 436.
12.
Townsend, A. A. (1961). “Equilibrium layer and wall turbulence.” J. Fluid Mech., 11, p. 97.
Information & Authors
Information
Published In
Copyright
Copyright © 1987 ASCE.
History
Published online: Jun 1, 1987
Published in print: Jun 1987
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.