Particle–particle collisions in the Lagrangian modelling of saltating grains By ROBERT J. BIALIK, Journal of Hydraulic Research, Vol. 49, No. 1 (2011), pp. 23–31

0377213 - ÚH 2013 NL eng O - Ostatní výsledky
Lukerchenko, Nikolay
Particle–particle collisions in the Lagrangian modelling of saltating grains By ROBERT J. BIALIK, Journal of Hydraulic Research, Vol. 49, No. 1 (2011), pp. 23–31.
Journal of Hydraulic Research. Roč. 50, č. 2 (2012), s. 251-252. ISSN 0022-1686. E-ISSN 1814-2079
Výzkumný záměr: CEZ:AV0Z20600510
Klíčová slova: saltation * spherical particle * particle-particle collision * numerical model
Kód oboru RIV: BK - Mechanika tekutin

The author appreciates important improvements brought in R. Bialik suggested model by introducing the effect of turbulent velocity fluctuations into modeling of particles saltation movement. However he recommended using 3D model of particle saltation, because the problem of particle-particle collision cannot be successfully solved under the 2D particle motion. Similarly, particle rotation cannot be neglected, because the particle velocity immediately after a collision depends on the particle angular velocity before collision. Further, the Basset force should be calculated with regard to the particle collisions, which increases the Basset force within a short period after the collision, so that its impulse remains finite.
Trvalý link: http://hdl.handle.net/11104/0209437