Back to Search Start Over

Formulation of bed shear stress for computing bed-load transport rate in vegetated flows.

Authors :
Lu, Yesheng
Cheng, Nian-Sheng
Wei, Maoxing
Source :
Physics of Fluids. Nov2021, Vol. 33 Issue 11, p1-9. 9p.
Publication Year :
2021

Abstract

Difficulties are often encountered in estimating the bed shear stress in vegetated flows over a sediment bed due to complex interactions of the flow, sediment, and vegetation. Without involving any empirical partition of the bed friction and vegetation resistance, this study presents an analytical approach to evaluate the bed shear stress in the presence of vegetation in light of the phenomenological theory of turbulence. Then, the bed-load transport rate in vegetated flows is computed, with a result that agrees well with the bed-load transport formula developed for unvegetated flows. In addition, it is also shown that the present method is applicable not only to uniformly distributed vegetation but also to vegetation patches. However, further efforts are needed to extend the present model for flexible and submerged vegetation conditions. [ABSTRACT FROM AUTHOR]

Subjects

Subjects :
*SHEARING force
*PLANTS

Details

Language :
English
ISSN :
10706631
Volume :
33
Issue :
11
Database :
Academic Search Index
Journal :
Physics of Fluids
Publication Type :
Academic Journal
Accession number :
153907608
Full Text :
https://doi.org/10.1063/5.0067851