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3D numerical model of the spherical particle saltation in a channel with a rough fixed bed

SYSNO ASEP	0330616
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	3D numerical model of the spherical particle saltation in a channel with a rough fixed 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. 2 (2009), s. 100-112
Number of pages	13 s.
Publication form	on-line - on-line
Language	eng - English
Country	SK - Slovakia
Keywords	3D Saltation Model ; Bed-Load Transport ; Particle-Bed Collision ; Particle Rotation ; Particle Lateral Dispersion
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	000267238300003
DOI	10.2478/v10098-009-0009-x
Annotation	The paper describes a 3D numerical model of the spherical particle saltation. The particle free motion in water and the particle-bed collision were distinguished. The particle motion consists of the translational and rotational particle motion. A stochastic method of calculation of the particle-bed collision was developed. The collision height and the contact point were defined as random variables. Impulse equations were used and the translational and angular velocity components of the moving particle immediately after the collision were expressed as functions of the velocity components just before the collision. The dimensionless coefficients of the drag force and drag torque were determined as functions of both translational and rotational Reynolds numbers. The model is in good agreement with known experimental data. Examples of calculation of the particles’ lateral dispersion and the mean absolute values of the deviation angle of the particle trajectory are presented.
Workplace	Institute of Hydrodynamics
Contact	Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003
Year of Publishing	2010

Number of the records: 1