Open AccessBasset force in numerical models of saltation / Bassetova síla v numerických modelech saltace částic
Author(s) -
Nikolay Lukerchenko,
Jindřich Dolanský,
Pavel Vlasák
Publication year - 2012
Publication title -
vodohospodársky časopis/journal of hydrology and hydromechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.784
H-Index - 25
eISSN - 1338-4333
pISSN - 0042-790X
DOI - 10.2478/v10098-012-0024-1
Subject(s) - mechanics , physics , magnetosphere particle motion , classical mechanics , particle (ecology) , boundary value problem , geology , oceanography , quantum mechanics , magnetic field
In numerical models of fluid flow with particles moving close to solid boundaries, the Basset force is usually calculated for the particle motion between particle-boundary collisions. The present study shows that the history force must also be taken into account regarding particle collisions with boundaries or with other particles. For saltation - the main mode of bed load transport - it is shown using calculations that two parts of the history force due to both particle motion in the fluid and to particle-bed collisions are comparable and substantially compensate one another. The calculations and comparison of the Basset force with other forces acting on a sand particle saltating in water flow are carried out for the different values of the transport stage. The conditions under which the Basset force can be neglected in numerical models of saltation are studied.