Study of the features of rising of air bubbles and solid spheres
https://doi.org/10.7868/S2073667318040093
Abstract
The results of numerical modeling of rising of bubbles and solid spheres with a diameter of 1 to 20 mm in water are presented. The analysis is based on the numerical solution of the complete system of Navier—Stokes equations for a two-phase medium in a three-dimensional formulation in an implicit manner. The interface gas-water boundary is automatically monitored by the method of allocating the volume fraction. The motion of solid spheres is modeled using the method “Chimera”. Particular attention is paid to the study of local physical characteristics of motion process. Comparison of average calculated rising velocities with experimental data is carried out. The periodic (zigzag or spiral) character of the trajectory of moving bubbles associated with changing their shape and with the formation of a characteristic turbulent trace is shown. The correlation of the velocity of bubble rise with the forces acting on it is obtained. The tendency of change of a rise trajectory in process of increase of number of Galileo is revealed for solid spheres.
About the Authors
A. S. KozelkovRussian Federation
Nizhny Novgorod
V. R. Efremov
Russian Federation
Tula
S. M. Dmitriev
Russian Federation
Nizhny Novgorod
A. A. Kurkin
Russian Federation
Nizhny Novgorod
E. N. Pelinovsky
Russian Federation
Nizhny Novgorod
N. V. Tarasova
Russian Federation
Nizhny Novgorod
D. Yu. Strelets
Russian Federation
Moscow
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Review
For citations:
Kozelkov A.S., Efremov V.R., Dmitriev S.M., Kurkin A.A., Pelinovsky E.N., Tarasova N.V., Strelets D.Yu. Study of the features of rising of air bubbles and solid spheres. Fundamental and Applied Hydrophysics. 2018;11(4):73-80. (In Russ.) https://doi.org/10.7868/S2073667318040093