Hydrodynamic focusing of a particle flux

Based on numerical integration of the equations of mechanics of multiphase media, an effect of focusing of a particle flux generated by a source located on the upper wall of a closed vessel has been revealed and investigated.Notation t time - x, y Cartesian coordinates - U₁ (u ₁, v₁),P, ₁ velocity, pressure, and density of the gas - ₂,U ₂ mean density and velocity of the dispersed phase - V _k , r _k velocity and radius vector of a macroparticle - g gravitational acceleration - e(0–1) gravity force vector - dynamic viscosity of the gas - f friction force of particles in the gas - Eu, Re Euler and Reynolds numbers - dimensionless time of the high-rate relaxation of particles Élektrogorsk Research Center, Russia; Institute of Mechanics and Biomechanics, Sofia, Bulgaria; Institute for Problems in Mechanics, Russian Academy of Sciences, Moscow. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 68, No. 3, pp. 355–360, May–June, 1995.