HYDRAULIC RESISTANCE OF RIPPLES

被引：2
|
作者：
LAU, YL
机构：
[1] Rivers Res. Branch, Nat. Water Res. Inst., Canada Ctr. for Inland Waters, Burlington,ON,L7R 4A6, Canada
来源：
JOURNAL OF HYDRAULIC ENGINEERING-ASCE | 1988年 / 114卷 / 10期
关键词：
Friction - Hydraulics - Shear flow;
D O I：
10.1061/(ASCE)0733-9429(1988)114:10(1275)
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Experiments were conducted to investigate the division of the total shear stress into a friction loss and a form loss component for flows with ripples on the bed. Four different sizes of glass beads were used as bed material, each representing a different value of the dimensionless variable Ξ. The experimental evidence indicates that Y′, the mobility number related to the frictional shear stress, is dependent only upon Y', the mobility number related to the total shear stress. The variable Ξ appears to have an effect only in so far as it determines the value of Ycr, the critical mobility number for the initiation of sediment motion. Inspection of other published data revealed much the same dependence. Copyright © 1988 ASCE.
引用
收藏
页码：1275 / 1282
页数：8
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