標題: MOMENT MODEL OF NONUNIFORM CHANNEL-BEND FLOW .2. ERODIBLE BEDS
作者: YEH, KC
KENNEDY, JF
交大名義發表
土木工程學系
National Chiao Tung University
Department of Civil Engineering
公開日期: 1-七月-1993
摘要: The hybrid integral-differential moment and momentum model of fixed-boundary channel-bend flows developed in the companion paper is extended to erodible-bed flows. The theta unit sediment discharge is formulated as a power of local depth-averaged theta velocity; and the r unit sediment discharge as proportional to the ratio of the excess of the r bed shear stress, over the radial component of the submerged weight of the sediment bed layer, to the theta bed shear stress. Bed topography is computed from two-dimensional (2D) sediment continuity. The resulting two coupled sets of simultaneous equations are solved numerically. The model yields accurate predictions of the velocities (primary and secondary), and 2D bed topography. The average radial bed slope, primary velocity-profile exponent, and secondary rotational and translational velocities exhibit much larger variations along the channel than in fixed-boundary bends. The increased variation and oscillatory behavior of these quantities are elucidated from moment-of-momentum conservation and interaction of bed topography and flow.
URI: http://hdl.handle.net/11536/2972
ISSN: 0733-9429
期刊: JOURNAL OF HYDRAULIC ENGINEERING-ASCE
Volume: 119
Issue: 7
起始頁: 796
結束頁: 815
顯示於類別:期刊論文


文件中的檔案:

  1. A1993LH27900002.pdf