Numerical study of transition between rolling and saltation movement of spherical particles

0380082 - ÚH 2013 RIV CZ eng J - Článek v odborném periodiku
Kharlamova, Irina - Kharlamov, Alexander - Chára, Zdeněk - Vlasák, Pavel
Numerical study of transition between rolling and saltation movement of spherical particles.
Acta Technica CSAV. Roč. 57, č. 2 (2012), s. 211-226. ISSN 0001-7043
Grant CEP: GA ČR GA103/09/1718
Výzkumný záměr: CEZ:AV0Z20600510
Klíčová slova: sediment transport * saltation * rolling * rolling/saltation transition * start of saltation
Kód oboru RIV: BK - Mechanika tekutin

Modelling of rolling and saltation movements of particles is dealt with, transition between rolling and saltation is described and the flow condition for it is found. This investigation is based on a suggestion that rolling might be considered as a saltation with small leaps. A numerical model of spherical particle saltation in turbulent flow in a channel is used and several criteria of difference between saltation and rolling modes based on both the average length and the average height of saltation leap were proposed.
Trvalý link: http://hdl.handle.net/11104/0210894