Study of the particle motion induced by a vortex shaker

Research output: Contribution to journalArticle

Authors

  • Somik Chakravarty
  • Marc Fischer
  • Pablo García-tríñanes
  • Olivier Le Bihan
  • Martin Morgeneyer

Colleges, School and Institutes

External organisations

  • Université de Technologie de Compiègne (UTC) – Sorbonne Universités, Laboratoire Transformations intégrées de la matière renouvelable (TIMR)
  • Institut National de l’ EnviRonnement Industriel et des RisqueS (INERIS), NOVA/CARA/DRC/INERIS, Parc Technologique Alata
  • University of Greenwich

Abstract

The behaviour of a traced alumina particle lying on limestone powders with similar features has been studied in a test tube agitated by a vortex shaker aiming at studying dust emissions from powders. PEPT (Positron Emission Particle Tracking) was used for measuring the particle's position. Population densities were computed as the frequency of the particle's presence in different regions dividing the two horizontal axes and the vertical axis, respectively. The velocities of the particle were calculated by filtering out all displacements inferior to a critical distance dcrit so as not to consider spurious movements caused by experimental noise. After its validation, the methodology was applied to the standard condition of a vortex shaker experiment (ω = 1500 rpm, 2 g of powder and open test tube). While the horizontal coordinates and velocity components follow a symmetric distribution, the vertical coordinate is characterised by a large asymmetrical plateau. The heights reached by the particle (up to 24.3 mm) are small in comparison to that of the test tube (150 mm). The greatest velocities are found near the inner wall of the test tube and at the highest heights where the population densities are the lowest. The median velocity of the particle is 0.0613 m.s −1 whereas its median kinetic energy is 8.4E-12 J. The method explicated in the present study is directly applicable to any other sets of data obtained through PEPT, especially if the system is of small dimension.

Details

Original languageEnglish
Pages (from-to)54-64
JournalPowder Technology
Volume322
Early online date31 Aug 2017
Publication statusPublished - 1 Dec 2017

Keywords

  • PEPT , powder , vortex-shaker , dustiness