Interparticle Collisions in Turbulent Two-Phase Flows

The article considers problems and specific features of accounting for collisions of solid particles with each other. The fundamentals of the theory of interparticle collisions are briefly described. The analytical methods developed to date for calculating the nuclei of collisions of monodisperse and bidisperse particles in homogeneous isotropic turbulence, a gradient turbulent flow, as well as under the combined action of turbulence and gravity are described and analyzed. The brunt of the focus is on describing the methods for numerical simulation of two-phase flows, which represent the interphase boundary, interphase interactions, and turbulence of the carrier medium at different hierarchical levels.