Velocity Distribution in Compound Channel Flows by Numerical Modeling
This article has a reply.
VIEW THE REPLYPublication: Journal of Hydraulic Engineering
Volume 120, Issue 10
Abstract
The paper examines the problem of prediction of uniform turbulent flow in a compound channel with the nonlinear model. This model is capable of predicting the secondary currents, caused by the anisotropy of normal turbulent stresses, that are important features of the flow in compound channels, as they determine the transverse momentum transfer. The model is applied to reproduce experimental runs available in the literature. The comparison shows that the model predicts with accuracy the distribution of the primary velocity component, the secondary circulation, and the discharge distribution. The numerical results are used to search a subdivision surface between main channel and floodplain on the basis of the flow field and to compare different subdivision surfaces on the basis of the discharge distribution by a simple uniform flow formula. The better subdivision surfaces as predicted by the model are the diagonal surface going from the corner between main channel and floodplain to the free surface on the symmetry plane and the bisector of the same corner.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Arnold, U., Hottges, J., and Rouvé, G. (1989). “Turbulence and mixing mechanisms in compound open channel flow.” Proc., XXIII IAHR Congr., Ottawa, Canada, A133–A140.
2.
Baird, J. I., and Ervine, D. A. (1984). “Resistance to flow in channels with overbank flood‐plain flows.” Proc., 1st Int. Conf. on Channels and Channel Control Struct., Springer Verlag, Berlin, Germany, 4.137–4.150.
3.
Hossain, M. S., and Rodi, W. (1980). “Mathematical modelling of vertical mixing in stratified channel flow.” Proc., 2nd Symp. on Stratified Flows, Trondheim, Norway.
4.
Kawahara, Y., and Tamai, N. (1989). “Mechanism of lateral momentum transfer in compound open channel flow.” Proc., XXIII IAHR Congr., Ottawa, Canada, B463–B470.
5.
Keller, R. J., and Rodi, W. (1988). “Prediction of flow characteristics in main channel‐flood plain flows.” J. Hydr. Res., 26(4), 425–440.
6.
Knight, D. W., and Demetriou, J. D. (1983). “Flood plain and main channel flow interaction.” J. Hydr. Engrg., ASCE, 109(8), 1073–1092.
7.
Knight, D. W., Demetriou, J. D., and Hamed, M. E. (1984). “Stage discharge relationships for compound channel.” Proc., 1st Int. Conf. on Channels and Channel Control Struct., Springer Verlag, Berlin, Germany, 4.21–4.25.
8.
Krishnappan, B. G. (1984). “Laboratory verification of turbulent flow model.” J. Hydr. Engrg., ASCE, 110(4), 500–514.
9.
Krishnappan, B. G., and Lau, Y. L. (1986). “Turbulence modeling of flood plain flows.” J. Hydr. Engrg., ASCE, 112(4), 251–266.
10.
Launder, B. E., and Spalding, D. B. (1974). “The numerical computation of turbulent flows.” Comp. Methods in Appl. Mech. and Engrg., 3, 269–289.
11.
Myers, W. R. C. (1978). “Momentum transfer in a compound channel.” J. Hydr. Res., 16(2), 139–150.
12.
Myers, W. R. C. (1984). “Frictional resistance in channel with flood plains.” Proc., 1st Int. Conf. on Channels and Channel Control Struct., Springer Verlag, Berlin, Germany, 4.73–4.87.
13.
Myers, W. R. C. (1987). “Velocity and discharge in compound channels.” J. Hydr. Engrg., ASCE, 113(6), 753–766.
14.
Naot, D., and Rodi, W. (1982). “Calculation of secondary currents in channel flow.” J. Hydr. Div., ASCE, 108(8), 948–968.
15.
Naot, D., Yacoub, N., and Maron Moalem, D. (1989). “Open surface renewal boundary conditions for the turbulence model.” Proc., XXIII IAHR Congr., Ottawa, Canada, A293–A299.
16.
Naot, D., Nezu, I., and Nakagawa, H. (1993). “Hydrodinamic behavior of compound rectangular open channels.” J. Hydr. Engrg., ASCE, 119(3), 390–408.
17.
Patankar, S. V. (1980). Numerical heat transfer and fluid flow. Hemisphere Publishing Corporation, New York, N.Y.
18.
Patankar, S. V., and Spalding, D. B. (1972). “A calculation procedure for heat, mass and momentum transfer in three‐dimensional parabolic flows.” Int. J. Heat Mass Transfer, 15, 1787–1806.
19.
Pezzinga, G. (1990a). “Applicazione del modello k‐e non lineare allo studio di circolazioni secondarie.” Atti, XXII Conv. di Idraulica e Costruzioni Idrauliche, Editoriale BIOS, Cosenza, Italy, 2, 125–139 (in Italian).
20.
Pezzinga, G. (1990b). “Sulla riproduzione del campo di moto in canali a sezione composta.” Pubbl. n. 134 dell‘Istituto di Idraulica Idrologia e Gestione dette Acque, Universitè di Catania, Catania, Italy (in Italian).
21.
Prinos, P. (1990). “Turbulence modelling of main channel‐flood plain flows with an algebraic stress model.” Proc., Int. Conf. on River Flood Hydr., John Wiley and Sons, Chichester, U.K., 173–185.
22.
Prinos, P., Townsend, R., and Tavoularis, S. (1985). “Structure of turbulence in compound channel flows.” J. Hydr. Engrg., ASCE, 111(9), 1246–1261.
23.
Rajaratnam, N., and Ahmadi, R. (1981). “Hydraulics of channel with flood‐plains.” J. Hydr. Res., 19(1), 43–60.
24.
Rodi, W. (1976). “A new algebraic relation for calculating the Reynolds stresses.” ZAMM 56, Zeitschrift für Angerwandte Mathematik und Mechanik, Akademie Verlag, Berlin, Germany, T219–T221.
25.
Sellin, R. H. J. (1964). “A laboratory investigation into the interaction between the flow in the channel of a river and that over its flood plain.” La Houille Blanche, Paris, France, 7, 793–802.
26.
Smart, G. M. (1992). “Stage‐discharge discontinuity in composite flood channels.” J. Hydr. Res., 30(6), 818–833.
27.
Speziale, C. G. (1987). “On nonlinear and models of turbulence.” J. Fluid Mech., 178, 459–475.
28.
Tominaga, A., and Nezu, I. (1991). “Turbulent structure in compound open‐channel flow.” J. Hydr. Engrg., ASCE, 117(1), 21–41.
29.
Tominaga, A., Nezu, I., and Ezaki, K. (1989). “Experimental study on secondary currents in compound open‐channel flow.” Proc., XXIII IAHR Congr., Ottawa, Canada, A15–A22.
30.
Wormleaton, P. R., Allen, J., and Hadjipanos, P. (1982). “Discharge assessment in compound channel flow.” J. Hydr. Div., ASCE, 108(9), 975–994.
31.
Wormleaton, P. R., and Hadjipanos, P. (1985). “Flow distribution in compound channels.” J. Hydr. Engrg., ASCE, 111(2), 357–361.
32.
Yen, C. L., and Ho, S. Y. (1983). “Discussion of ‘Discharge assessment in compound channel flow,’ by P. R. Wormleaton, J. Allen, and P. Hadjipanos.” J. Hydr. Engrg., ASCE, 109(11), 1561–1567.
33.
Yes, C. L., and Overton, E. (1973). “Shape effects on resistance in flood‐plain channels.” J. Hydr. Div., ASCE, 99(1), 219–238.
Information & Authors
Information
Published In
Copyright
Copyright © 1994 American Society of Civil Engineers.
History
Received: Apr 13, 1993
Published online: Oct 1, 1994
Published in print: Oct 1994
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.