3D numerical model of the spherical particle saltation in a channel with a rough fixed bed | 3D numericky model saltace kulovite castice v koryte s pevnym drsnym dnem
2009
Lukerchenko, N., Academy of Sciences of the Czech Republic, Prague (Czech Republic). Institute of Hydrodynamics | Piatsevich, S., Academy of Sciences of the Czech Republic, Prague (Czech Republic). Institute of Hydrodynamics | Chara, Z., Academy of Sciences of the Czech Republic, Prague (Czech Republic). Institute of Hydrodynamics | Vlasak, P., Academy of Sciences of the Czech Republic, Prague (Czech Republic). Institute of Hydrodynamics
The paper describes a 3D numerical model of the spherical particle saltation. Two stages of particle saltation were distinguished – the particle free motion in water and the particle-bed collision. The particle motion consists of the translational and rotational particle motion. A stochastic method of calculation of the particle-bed collision was developed. The collision height and the contact point were defined as random variables. Impulse equations were used and the translational and angular velocity components of the moving particle immediately after the collision were expressed as functions of the velocity components just before the collision. The dimensionless coefficients of the drag force and drag torque were determined as functions of both translational and rotational Reynolds numbers. The model is in good agreement with known experimental data. Examples of calculation of the particles lateral dispersion and the mean absolute values of the deviation angle of the particle trajectory are presented.
Mostrar más [+] Menos [-]Palabras clave de AGROVOC
Información bibliográfica
Este registro bibliográfico ha sido proporcionado por Agricultural Knowledge and Innovation Institute