METHOD OF DETERMINING THE COEFFICIENT OF RESISTANCE OF SOLID SPHERICAL PARTICLES IN NON-ISOTHERMAL CONDITIONS Russian patent published in 2019 - IPC G01N21/85 G01N25/18 G01N15/04 

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 regularities of movement of solid particles in liquid. Method involves feeding particles into a cell with a viscous liquid in the form of a regular prism with transparent walls and measuring their gravitational deposition rate in the liquid. Two identical-diameter particles made from the same material are introduced into the cuvette at zero initial speed. One of the particles immediately before introduction into the liquid is heated or cooled to a temperature different from the temperature of the other reference particle, equal to the liquid temperature, not less than ±20 K. Deposition rate of each of the particles is measured by a time-of-flight method using video filming of the deposition process through the transparent walls of the cuvette. Time of preliminary heating or cooling of one of particles, distance, at which speed of sedimentation of particles in liquid and coefficient of resistance of heated or cooled particles are measured, according to given algebraic ratios.

EFFECT: increasing accuracy of obtained results.

1 cl, 3 dwg, 5 tbl