Dependence of saltation characteristics on bed organisation in numerical simulation

0429339 - ÚH 2015 RIV KR eng J - Článek v odborném periodiku
Kharlamova, Irina - Vlasák, Pavel
Dependence of saltation characteristics on bed organisation in numerical simulation.
Geosciences Journal. Roč. 19, č. 1 (2015), s. 177-184. ISSN 1226-4806. E-ISSN 1598-7477
Grant CEP: GA ČR GA103/09/1718; GA ČR GAP105/10/1574
Institucionální podpora: RVO:67985874
Klíčová slova: saltation parameters * bed roughness * bed structure * bed load transport * armoured bed
Kód oboru RIV: BK - Mechanika tekutin
Impakt faktor: 0.922, rok: 2015
http://link.springer.com/content/pdf/10.1007%2Fs12303-014-0029-3.pdf

The present paper addresses the issue of saltation motion (one type of bed-load motion) that further may be used for prediction of sediment transport (formation of river beds, coastlines, pipe granular bed, etc.). The numerical approach used there is based on two components: the Lagrangian description of the suspended particles and a simulation of the interactions of suspended and bed particles. The novelty of the paper is a bed model. It is supposed that theoretical bed layer consists of identical spherical particles distributed in space in a special way. The offered bed model is used for the simulation of saltation motion in a turbulent stream. The influence of bed structure (diameter of bed particles and bed porosity) on saltation parameters (average length and height of one jump) is studied here. A comparison of saltation parameters with corresponding experimental parameters from literature was made.
Trvalý link: http://hdl.handle.net/11104/0234472