METHOD OF INVESTIGATING DEPOSITION OF A SPHERICAL CLOUD OF POLYDISPERSE SOLID PARTICLES IN A VISCOUS LIQUID Russian patent published in 2019 - IPC G01N21/85 

FIELD: physics.

SUBSTANCE: invention relates to the field of development of methods and devices for laboratory research of physical processes, in particular for investigation of laws of motion of a cloud of solid particles in a viscous liquid. Method for investigating deposition of a spherical cloud of polydispersed solid particles in a viscous liquid involves mixing particles by exposing ultrasonic vibrations to a spherical container immersed into a liquid, made in the form of two hemispherical shells embedded into each other with the possibility of opening it during rotation of one of the shells around the axis of symmetry, introduction of particles into a cell with a viscous liquid, made from a transparent material, and visualization of the process of settling particles, is characterized by the fact that a spherical container made of solid shells is pre-filled with water, polydispersed particles are mixed with water, wherein during mixing gradually displacing water from container with viscous liquid with coefficient of dynamic viscosity corresponding to viscosity of liquid in cuvette, wherein time of water displacement by viscous liquid and time of container opening is selected in accordance with relations τ₁≥(3÷5) minutes,

and initial concentration of particles in cloud is determined by formula

where τ₁ – time of water displacement from container with viscous liquid, c; τ₂ is container opening time, s; D_k is diameter of container, m; μ_l is coefficient of dynamic viscosity of liquid, Pa⋅c; ρ_p is density of particles material, kg/m³.

EFFECT: high accuracy of determining main characteristics and dynamics of deposition of a plurality of polydisperse particles.

1 cl, 3 dwg, 1 tbl