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Výpočet funkcí parametrů saltačního procesu
Piatsevich, Siarhei ; Lukerchenko, Nikolay ; Chára, Zdeněk ; Vlasák, Pavel
The results of the 3D simulation of the solid spherical particles saltation in an open channel with rough bed are presented. The dependences of mean saltation length, mean saltation height, mean saltation velocity and mean deviation of angle of particle trajectories with respect to the downstream direction were studied and determined as the functions of the saltation process parameters, such as the flow shear velocity and the particle diameter.
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Numerický 3D model kolize pevné částice s drsným dnem kanálu
Lukerchenko, Nikolay ; Chára, Zdeněk ; Vlasák, Pavel
The paper deals with 3D numerical model of the random process of rotating spherical particle-bed impact and rebound for saltation movement of a particle in channels with rough bed. The collision height and the contact point are defined as random variables of the collision process. The collision height depends on bed roughness. The contact point position depends on the irection of the particle velocity vector before the collision
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