QUASI-DIFFUSION SEPARATION ACTIVATION OF SHEAR DEFORMATIONS IN A FAST GRAVITATIONAL GRANULAR MATERIAL FLOW

The paper presents the results of a study of the eff ects of separation of spherical particles with diff erent densities in a fast gravitational fl ow on a rough slope with varying fl ow parameters in order to increase the effi ciency of the process. The determining role of the eff ect of quasi-diff usion separation in the process has been established, the intensive manifestation of which is facilitated by the formation of s-shaped profi les of the fraction of voids and velocity in the fl ow. The results of an experimental and analytical study of the effi ciency of particle separation by density in a fast gravitational fl ow when shear deformations are activated by longitudinal pulses are presented. It has been established that when particles are exposed to the pulse eff ect from the open surface of the fl ow, its central part develops a zone with a typical s-shaped infl ection in the velocity profi le and void fraction, which functions like a quasi-diff usion separator that increases the effi ciency of the process.
The paper presents the results of a study of the eff ects of separation of spherical particles with diff erent densities in a fast gravitational fl ow on a rough slope with varying fl ow parameters in order to increase the effi ciency of the process. The determining role of the eff ect of quasi-diff usion separation in the process has been established, the intensive manifestation of which is facilitated by the formation of s-shaped profi les of the fraction of voids and velocity in the fl ow. The results of an experimental and analytical study of the effi ciency of particle separation by density in a fast gravitational fl ow when shear deformations are activated by longitudinal pulses are presented. It has been established that when particles are exposed to the pulse eff ect from the open surface of the fl ow, its central part develops a zone with a typical s-shaped infl ection in the velocity profi le and void fraction, which functions like a quasi-diff usion separator that increases the effi ciency of the process.
Author:  V. N. Dolgunin, O. O. Ivanov, K. A. Kudi
Keywords:  granular material, fast gravitational fl ow, activation of shear deformations, segregation, quasi-diff usion separation
Page:  1193