Detachment of Buoyant Surface Jets Discharged on Slope
Publication: Journal of Hydraulic Engineering
Volume 119, Issue 8
Abstract
Characteristics of a buoyant surface jet discharged on a sloping bottom are reviewed and a numerical experiment is performed to evaluate the depth at the point where the jet detaches from the bottom. This calculation is important in the context of predicting dilution and spreading characteristics of buoyant discharges, for example, associated with heated discharges from power plants. The experiment is based on a direct numerical solution of the longitudinally integrated momentum equation, which takes into account entrainment and bottom friction. Results are compared with laboratory and field data reported in the literature, as well as previous empirical relations for calculating this depth. It is found that the appropriately scaled detachment depth varies with the inverse of the discharge densimetric Froude number. The scaled depth decreases with increases in either the entrainment or bottom friction coefficient, but increases with increasing slope. A minor effect of discharge aspect ratio is also shown. An equation is developed for predicting detachment depth and the results help to resolve differences seen in previous relations.
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References
1.
Adams, E. E., Stolzenbach, K. D., and Harleman, D. R. F. (1975). “Near and far‐field analysis of buoyant surface discharges into large bodies of water.” Tech. Report No. 205, Ralph Parsons Lab., Massachusetts Inst. of Tech., Cambridge, Mass.
2.
Adams, E. E. (1977). “Analysis of a buoyant surface discharge over a shallow sloping bottom.” Proc. 17th Congress Int. Association of Hydraulic Research, Int. Association of Hydr. Res. (IAHR) Delft, The Netherlands, 1, 363–370.
3.
Arita, M., Jirka, G. H., and Tamai, N. (1986). “Classification and mixing of two‐dimensional buoyant surface discharges.” J. Hydr. Res., 24, 333–345.
4.
Baddour, R. E., and Chu, V. H. (1975). “Buoyant surface discharge on a step and on a sloping bottom.” Tech. Report No. 75‐2 (FML), McGill Univ., Montreal, Canada.
5.
Baddour, R. E., and Dance, P. G. (1983). “Surface buoyant discharge in a vertically confined environment.” ASME Publications 83‐WA/FE‐1, American Society of Mech. Engrs. (ASME), New York, N.Y.
6.
Carter, H. H., and Reiger, R. (1974). “The three dimensional heated surface jet in a cross flow.” Tech. Rep. No. 88, Chesapeake Bay Inst., The Johns Hopkins Univ., Baltimore, Md.
7.
Chu, V. H., and Jirka, G. H. (1986). “Surface buoyant jets and plumes.” Encyclopedia of Fluid Mech., N. Chermisinoff, ed., 6, Gulf Publishing Co., Houston, Tex.
8.
Hauenstein, W. (1983). “Zuflussbedingte Dichtestromungen in Seen.” Tech. Report No. R20‐83, Inst. for Hydromech., E. T. H., Zurich, Switzerland.
9.
Hearn, C. J., Hunter, J. R., Imberger, J., and van Senden, D. (1985). “A tidally induced jet in Koombana Bay, Western Australia.” Aust. J. Mar. Freshwater Res., 36, 453–479.
10.
Jen, Y., Weigel, R. L., and Mobarek, I. (1966). “Surface discharge of horizontal warm‐water jet.” J. Power Div., ASCE, 92(2), 1–12.
11.
Jirka, G. H., Adams, E. E., and Stolzenbach, K. D. (1981). “Buoyant surface jets.” J. Hydr. Div., ASCE, 107(11), 1467–1488.
12.
List, E. J. (1982). “Turbulent jets and plumes.” Ann. Rev. Fluid Mech., 14, 189–212.
13.
Luketina, D. A., and Imberger, J. (1987). “Characteristics of a surface buoyant jet.” J. Geophys. Res., 92(5), 5435–5447.
14.
Pagenkopf, J. R., Harleman, D. R. F., Ippen, A. T., and Pearce, B. R. (1974). “Oceanographic studies at Pilgrim Nuclear Power Plant station to determine characteristics of condenser water discharge (Correlation of field observations with theory).” Tech. Report No. 183, Ralph Parsons Lab., Massachusetts Inst. of Tech., Cambridge, Mass.
15.
Safaie, B. (1979). “Mixing of buoyant surface jet over sloping bottom.” J. Wtrwy. Port Coast. Oc. Div., ASCE, 105(4), 357–373.
16.
Stolzenbach, K. D., and Harleman, D. R. F. (1971). “An analytical and experimental investigation of surface discharges of heated water.” Tech. Report No. 135, Ralph Parsons Lab., Massachusetts Inst. of Tech., Cambridge, Mass.
17.
Stolzenbach, K. D., Adams, E. E., and Harleman, D. R. F. (1972). “A user's manual for three‐dimensional heated surface discharge computations.” Report No. 156, Ralph Parsons Lab., Massachusetts Inst. of Tech., Cambridge, Mass.
18.
Weigel, R. L., Mobarek, I., and Jen, Y. (1964). “Discharge of warm water jet over sloping bottom.” Inst. Eng. Res. Tech. Report No. HEL 3‐4, Univ. of California, Berkeley, Calif.
19.
Weigel, R. L., Harms, V. W., Safaie, B., Cumming, J. D., Della, R. P., Leidersdorf, C. B., and Young, C. (1976). “Report on model study of cooling water system of Pacific Gas and Electric Co. nuclear power plant located at Diablo Canyon, California.” Tech. Report No. HEL 27‐2, Hydr. Engrg. Lab., Univ. of California, Berkeley, Calif.
Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 119 • Issue 8 • August 1993
Pages: 878 - 894
Copyright
Copyright © 1993 American Society of Civil Engineers.
History
Received: Jun 22, 1992
Published online: Aug 1, 1993
Published in print: Aug 1993
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