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Numerical model of spherical particle saltation in a channel with a transversely tilted rough bed

SYSNO ASEP	0330620
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Numerical model of spherical particle saltation in a channel with a transversely tilted rough bed
Author(s)	Lukerchenko, Nikolay (UH-J) Piatsevich, Siarhei (UH-J) Chára, Zdeněk (UH-J)_{SAI, ORCID, RID} Vlasák, Pavel (UH-J)_{SAI, ORCID, RID}
Source Title	Journal of Hydrology and Hydromechanics. - : Ústav pro hydromechaniku AV ČR, v. v. i.. - : Ústav hydrológie SAV - ISSN 0042-790X Roč. 57, č. 3 (2009), s. 182-190
Number of pages	9 s.
Publication form	on-line - on-line
Language	eng - English
Country	SK - Slovakia
Keywords	saltation ; transversely tilted bed ; particle-bed collision ; particle sorting
Subject RIV	BK - Fluid Dynamics
R&D Projects	GA103/06/1487 GA ČR - Czech Science Foundation (CSF)
CEZ	AV0Z20600510 - UH-J (2005-2011)
UT WOS	000268906900005
DOI	10.2478/v10098-009-0017-x
Annotation	The paper deals with the spherical particle saltation in a channel with rough transversely tilted bed. Simulation is based on the 3D numerical model developed by the authors. It takes into account the translational and rotational particle motion. The stochastic method and the concept of a contact zone were used to determine a particle trajectory and its dependence on the bed lateral slope, particle diameter, and shear velocity. The effect of the bed lateral slope results in a deviation of the particle trajectory from the downstream direction. The particles trajectories were calculated and it was shown their random character. The centrelines of the bundle of trajectories can be approximated by the straight lines for low and moderate bed transverse slope. The deviation angle increases with increasing of the bed lateral slope, particle diameter and with decreasing the shear velocity. The particles can be sorted according to their size. An example of the particle sorting was calculated.
Workplace	Institute of Hydrodynamics
Contact	Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003
Year of Publishing	2010

Number of the records: 1