Model of rough bed for numerical simulation of saltation

0429343 - ÚH 2015 RIV GB eng J - Článek v odborném periodiku
Kharlamova, Irina - Vlasák, Pavel
Model of rough bed for numerical simulation of saltation.
European journal of environmental and civil engineering. Roč. 19, č. 3 (2015), s. 366-385. ISSN 1964-8189. E-ISSN 2116-7214
Grant CEP: GA ČR GA103/09/1718; GA ČR GAP105/10/1574
Institucionální podpora: RVO:67985874
Klíčová slova: saltation * bed load transport * rough bed * armoured bed * bed roughness
Kód oboru RIV: BK - Mechanika tekutin
Impakt faktor: 0.636, rok: 2015

The present paper offers a model of rough bottom for simulation of bed load transport. In the simulation, the bed load transport or sand motion happens in the open or close conduits with averaged turbulent flow. In the model, the channel bed consists of identical spherical particles distributed in space in a special way. In the vertical direction, the particles are dispersed according to a Gaussian distribution with a definite standard deviation. In the horizontal plane, the particles have a compact hexagonal packing. Hereby, a bed structure is described by two parameters: size of bed particles and their standard deviation in the vertical direction. A simple formula is proposed connecting bed roughness with the above-mentioned bed parameters. The dependencies of averaged saltation parameters (length and height of one jump) on bed structure are obtained here.
Trvalý link: http://hdl.handle.net/11104/0237296