Modelling of bed in process of particle saltation in channel

0359487 - ÚH 2012 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Kharlamova, Irina - Kharlamov, Alexander A. - Chára, Zdeněk - Vlasák, Pavel
Modelling of bed in process of particle saltation in channel.
Engineering Mechanics 2011. Prague: Institute of Thermomechanics AS CR, v. v. i., 2011 - (Fuis, V.), s. 279-282. ISBN 978-80-87012-33-8.
[Engineering Mechanics 2011 /17./. Svratka (CZ), 09.05.2011-12.05.2011]
Grant CEP: GA ČR GA103/09/1718
Výzkumný záměr: CEZ:AV0Z20600510
Klíčová slova: bed structure * normal distribution * hexagonal packing
Kód oboru RIV: BK - Mechanika tekutin

For numerical modelling particle saltation in channel with rough bed is important to define a bed configuration. The paper deals with the bed consisting of spherical particles of the different size then the saltating particle. In horizontal x-z plane the particles are arranged hexagonally. In vertical direction the particles are distributed according to Gaussian distribution. Before each collision of the saltating particle with bed the bed is shifted on a random distance and it is rotated by a random angle, so there is uniform probability to find a bed particle in any point of the x-z plane. The bed structure is chosen with aim to represent the natural bed as much as possible, thus the known information about distribution of the bed particles along y-direction is used and the location of bed particles in the x-z plane is controlled by principles of equal probability and minimal dense packing.
Trvalý link: http://hdl.handle.net/11104/0197268