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Transition from the saltation mode of bed load transport to the rolling mode

SYSNO ASEP	0330630
Document Type	C - Proceedings Paper (int. conf.)
R&D Document Type	Conference Paper
Title	Transition from the saltation mode of bed load transport to the rolling mode
Author(s)	Lukerchenko, Nikolay (UH-J) Ivanova, Irina (UH-J)_RID Chára, Zdeněk (UH-J)_{SAI, ORCID, RID} Vlasák, Pavel (UH-J)_{SAI, ORCID, RID}
Source Title	Engineering Mechanics 2009. - Praha : ÚTAM, 2009 / Náprstek, J. ; Fischer C. - ISBN 978-80-86246-35-2
Pages	s. 809-815
Number of pages	7 s.
Publication form	CD-ROM - CD-ROM
Action	Engineering mechanics 2009
Event date	11.05.2009-14.05.2009
VEvent location	Svratka
Country	CZ - Czech Republic
Event type	EUR
Language	eng - English
Country	CZ - Czech Republic
Keywords	bed-load transport ; particle saltation ; particle rolling ; numerical modelling
Subject RIV	BK - Fluid Dynamics
R&D Projects	GA103/06/1487 GA ČR - Czech Science Foundation (CSF)
	GA103/09/1718 GA ČR - Czech Science Foundation (CSF)
CEZ	AV0Z20600510 - UH-J (2005-2011)
Annotation	The paper deals with the sediment transport of sand particles conveyed by water in an open channel. A 3D numerical model developed by the authors was used for simulation of the sand particles movement in the channel with rough bed. Similarly to Shields theory of sediment transport incipient motion of the bed load particles the shear stress for the transition process from saltation mode to rolling mode can be defined. The shear stress value can be determined as a function of two dimensionless parameters, particle parameter and equivalent bed roughness. The particle parameter is a function of the particle size and density, and the carrier liquid density and viscosity. The presented numerical solution reveals that the shear stress for the transition process from saltation mode to rolling mode is less than the shear stress for the incipient sediment motion and depends on channel bed roughness.
Workplace	Institute of Hydrodynamics
Contact	Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003
Year of Publishing	2010

Number of the records: 1