Publication detail

Incipient motion of coarse uniform gravel

ROUŠAR, L. ZACHOVAL, Z. JULIEN, P.

Original Title

Incipient motion of coarse uniform gravel

Type

journal article in Web of Science

Language

English

Original Abstract

The influence of several parameters on the incipient motion of gravels has been carefully examined from theoretical and experimental standpoints. The effect of the longitudinal bed slope is significant and well described with existing methods. This analysis shows that the effects of the grain Reynolds number and relative submergence are negligible for turbulent flows over hydraulically rough boundaries. Laboratory experiments for homogeneous gravels on a plane bed provided detailed measurements of both mean flow velocity and velocity fluctuations for the analysis of the lift and drag coefficients. This analysis of the lift and drag coefficients enables a better evaluation of the Shields parameter for incipient motion as a function of the angle of repose . The theoretical developments presented in this paper are corroborated by the results of our laboratory experiments as well as many others available in the literature.

Keywords

Incipient motion, mathematical model, relative submergence, sediment transport, Shields parameter

Authors

ROUŠAR, L.; ZACHOVAL, Z.; JULIEN, P.

Released

16. 8. 2016

Publisher

Taylor & Francis Group

Location

Abingdon

ISBN

0022-1686

Periodical

JOURNAL OF HYDRAULIC RESEARCH

Year of study

54

Number

6

State

Kingdom of the Netherlands

Pages from

615

Pages to

630

Pages count

16

URL

http://www.tandfonline.com/doi/full/10.1080/00221686.2016.1212286

BibTex

@article{BUT128935,
  author="Ladislav {Roušar} and Zbyněk {Zachoval} and Pierre {Julien}",
  title="Incipient motion of coarse uniform gravel",
  journal="JOURNAL OF HYDRAULIC RESEARCH",
  year="2016",
  volume="54",
  number="6",
  pages="615--630",
  doi="10.1080/00221686.2016.1212286",
  issn="0022-1686",
  url="http://www.tandfonline.com/doi/full/10.1080/00221686.2016.1212286"
}