Calculating Flow in Manifold and Orifice System
Publication: Journal of Environmental Engineering
Volume 118, Issue 4
Abstract
Spatial distribution of water discharge can be obtained through a manifold consisting of main pipes and perforated laterals. This study formulates the problem of discharge distribution among lateral pipes and from laterals through orifices uniformly spaced along them. A nonlinear difference equation for flow in the pipes is solved numerically to determine the driving head as a function of the number of ports and a geometrical ratio. A dimensionless solution for simple manifolds is developed to obtain a direct method of evaluating discharges through all the orifices. The approach presented in this paper makes it possible to formulate the problem of restricting the maximum outlet‐discharge variation through a dividing‐flow manifold. A graphical solution to this problem is obtained that permits one to indicate the lateral‐to‐manifold diameter ratio for limiting this variation to a prescribed value. The results of this paper offer a means for comparing the uniformity of distribution expected from various combinations of the number of orifices and laterals and their sizes for a given manifold.
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References
1.
Baylis, J. R., Gullans, O., and Hudson, H. E. (1971). “Filtration.” Water quality and treatment, American Water Works Association (AWWA), Inc., New York, N.Y., 243–279.
2.
Clark, I. W., Veissman, W. Jr., and Hammer, J. J. (1971). “Physical‐treatment processes.” Water Supply and Pollution Control, International Text Book Co., New York, N.Y., 377–378.
3.
Culp, G. L., and Culp, R. L. (1974). “Filtration.” New concepts in water purification, Van Nostrand‐Reinhold Co., New York, N.Y., 51–108.
4.
Fair, G. M., Geyer, J. C., and Okun, D. A. (1968). Water and wastewater engineering. Vol. 2. John Wiley and Sons, Inc., New York, N.Y.
5.
Hudson, H. E. Jr. (1963). “Functional design of rapid sand filters.” J. Sanit. Engrg. Div., ASCE, 89(1), 17–28.
6.
Hudson, H. E. Jr. (1982). “Manifold hydraulics.” Clarification processes, Van Nostrand‐Reinhold Co., New York, N.Y., 259–275.
7.
Hudson, H. E. Jr., Uhler, R. B., and Bailey, R. W. (1979). “Dividing‐flow manifolds with square‐edged laterials.” J. Envir. Engrg., Div., ASCE, 105(4), 745–755.
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Copyright © 1992 ASCE.
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Published online: Jul 1, 1992
Published in print: Jul 1992
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