APPLICATION OF THE MODIFIED LOG-WAKE LAW IN OPEN-CHANNELS

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GUO JUNKE; JULIEN P.Y.

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Paper Information

Journal: JOURNAL OF APPLIED FLUID MECHANICS (JAFM) Year:2008 | Volume:1 | Issue:2 Page(s): 17-23

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Title

APPLICATION OF THE MODIFIED LOG-WAKE LAW IN OPEN-CHANNELS

Author(s)

GUO JUNKE | JULIEN P.Y. | Issue Writer Certificate

Keywords

OPEN CHANNEL FLOW

TURBULENCE

VELOCITY DIP PHENOMENON

VELOCITY DISTRIBUTION

VELOCITY PROFILE

Abstract

The modified log-wake law, which was developed for turbulent boundary layers and pipe flows, is extended to turbulent flows in open-channels. Turbulent VELOCITY PROFILEs in open-channels can be approximated with three components: (1) the law of the wall that results from the constant bed shear stress; (2) the law of the wake that reflects the effects of gravity, secondary currents and bed roughness; and (3) the cubic correction near the maximum velocity. A procedure to determine the four model parameters from velocity measurements while keeping k=0.41 is presented. The modified log-wake law compares very well with experimental data from Coleman, Lyn, Kironoto and Graf and Sarma et al. It also replicates the measured VELOCITY PROFILEs of the Mississippi River. In particular, it can well fit the VELOCITY DIP PHENOMENON in openchannels where the conventional log-wake law fails.

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APA: Copy

GUO, JUNKE, & JULIEN, P.Y.. (2008). APPLICATION OF THE MODIFIED LOG-WAKE LAW IN OPEN-CHANNELS. JOURNAL OF APPLIED FLUID MECHANICS (JAFM), 1(2), 17-23. SID. https://sid.ir/paper/307286/en

Vancouver: Copy

GUO JUNKE, JULIEN P.Y.. APPLICATION OF THE MODIFIED LOG-WAKE LAW IN OPEN-CHANNELS. JOURNAL OF APPLIED FLUID MECHANICS (JAFM)[Internet]. 2008;1(2):17-23. Available from: https://sid.ir/paper/307286/en

IEEE: Copy

JUNKE GUO, and P.Y. JULIEN, “APPLICATION OF THE MODIFIED LOG-WAKE LAW IN OPEN-CHANNELS,” JOURNAL OF APPLIED FLUID MECHANICS (JAFM), vol. 1, no. 2, pp. 17–23, 2008, [Online]. Available: https://sid.ir/paper/307286/en

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