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Role of near-bed turbulence in bedload transport

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Abstract

Bedload transport by a turbulent fluid moving over an erodible sediment bed results from complex interactions between flow field of the overlying fluid and the grains making up the bed. To develop a better view of these interactions, a method that combines high-speed photography with laser-Doppler velocimetry was devised. The methodology permits correlation of bedload transport with local turbulence structure at a frequency resolution of 10 hz. By making a suite of measurements at varying distances from a backward step, data were obtained for a variety of flows with different turbulence characteristics ranging from steady, uniform boundary layers to highly intermittent, nonuniform wake-like flows.

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Title:
Role of near-bed turbulence in bedload transport
Volume
2
Year Published:
1995
Language:
English
Publisher:
ASCE
Publisher location:
New York, NY, United States
Larger Work Title:
Proceedings of Engineering Mechanics
First page:
686
Last page:
689
Conference Title:
Proceedings of the 10th Conference on Engineering Mechanics. Part 1 (of 2)
Conference Location:
Boulder, CO, USA
Conference Date:
21 May 1995 through 24 May 1995