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

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    SYSNO ASEP0330616
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JČlánek ve WOS
    Title3D 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 TitleJournal 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 pages13 s.
    Publication formon-line - on-line
    Languageeng - English
    CountrySK - Slovakia
    Keywords3D Saltation Model ; Bed-Load Transport ; Particle-Bed Collision ; Particle Rotation ; Particle Lateral Dispersion
    Subject RIVBK - Fluid Dynamics
    R&D ProjectsGA103/06/1487 GA ČR - Czech Science Foundation (CSF)
    CEZAV0Z20600510 - UH-J (2005-2011)
    UT WOS000267238300003
    DOI https://doi.org/10.2478/v10098-009-0009-x
    AnnotationThe 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.
    WorkplaceInstitute of Hydrodynamics
    ContactSoňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003
    Year of Publishing2010
Number of the records: 1  

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