Basset force in numerical models of saltation

0385096 - ÚH 2013 RIV SK eng J - Journal Article
Lukerchenko, Nikolay - Dolanský, Jindřich - Vlasák, Pavel
Basset force in numerical models of saltation.
Journal of Hydrology and Hydromechanics. Roč. 60, č. 4 (2012), s. 277-287. ISSN 0042-790X. E-ISSN 1338-4333
R&D Projects: GA ČR GA103/09/1718
Institutional research plan: CEZ:AV0Z20600510
Keywords : basset force * bed load transport * numerical model * particle-bed collision
Subject RIV: BK - Fluid Dynamics
Impact factor: 0.653, year: 2012

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.
Permanent Link: http://hdl.handle.net/11104/0007288