Experimental investigation of the coefficient of restitution of particles colliding with surfaces in air and water

Idan Yardeny, Dmitry Portnikov, Haim Kalman

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

The coefficient of restitution is a parameter used to describe the result of a collision between either two particles or a particle and a surface. The coefficient of restitution is a measure of the amount of kinetic energy dissipation during a collision. This work aimed to study the behavior of the coefficient of restitution based on the velocity of the impacting particle and the properties of the surface and/or particle involved in the collision. This goal was achieved by establishing an experimental system to measure the coefficient of restitution, conducting experiments, and determining dependence between parameters using analytical tools. To measure the coefficient of restitution correctly, based on a large data basis and wide ranges of properties and operating conditions, experiments were conducted on different surfaces and particulate materials with different collision angles and velocities. These experiments were conducted in different surroundings (air and liquid), which posed an important issue. For accurate prediction, after analyzing the results, a correlation was proposed to estimate the value of the coefficient of restitution depending on the mechanical properties of the particle and surface, angle and speed of the collision, and characteristics of the collision medium. Most of the tests for the wide range of properties and conditions were fit to the final correlation by ±30%.

Original languageEnglish
Pages (from-to)3747-3759
Number of pages13
JournalAdvanced Powder Technology
Volume31
Issue number9
DOIs
StatePublished - 1 Sep 2020

Keywords

  • Coefficient of restitution
  • Collision
  • Collision angle
  • Immersed particles
  • Non-spherical particles
  • Particle impact

ASJC Scopus subject areas

  • General Chemical Engineering
  • Mechanics of Materials

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