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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 ASEP 0330616 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název 3D numerical model of the spherical particle saltation in a channel with a rough fixed bed Tvůrce(i) Lukerchenko, Nikolay (UH-J)
Piatsevich, Siarhei (UH-J)
Chára, Zdeněk (UH-J) SAI, ORCID, RID
Vlasák, Pavel (UH-J) SAI, ORCID, RIDZdroj.dok. 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. 100-112Poč.str. 13 s. Forma vydání on-line - on-line Jazyk dok. eng - angličtina Země vyd. SK - Slovensko Klíč. slova 3D Saltation Model ; Bed-Load Transport ; Particle-Bed Collision ; Particle Rotation ; Particle Lateral Dispersion Vědní obor RIV BK - Mechanika tekutin CEP GA103/06/1487 GA ČR - Grantová agentura ČR CEZ AV0Z20600510 - UH-J (2005-2011) UT WOS 000267238300003 DOI 10.2478/v10098-009-0009-x Anotace 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. Pracoviště Ústav pro hydrodynamiku Kontakt Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003 Rok sběru 2010
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