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Numerical model of spherical particle saltation in a channel with a transversely tilted rough bed
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SYSNO ASEP 0330620 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Numerical model of spherical particle saltation in a channel with a transversely tilted rough 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. 3 (2009), s. 182-190Poč.str. 9 s. Forma vydání on-line - on-line Jazyk dok. eng - angličtina Země vyd. SK - Slovensko Klíč. slova saltation ; transversely tilted bed ; particle-bed collision ; particle sorting Vědní obor RIV BK - Mechanika tekutin CEP GA103/06/1487 GA ČR - Grantová agentura ČR CEZ AV0Z20600510 - UH-J (2005-2011) UT WOS 000268906900005 DOI 10.2478/v10098-009-0017-x Anotace 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. Pracoviště Ústav pro hydrodynamiku Kontakt Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003 Rok sběru 2010
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