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Analysis of Concentration Profiles in Dense Settling-Slurry Flows

[+] Author Affiliations
Václav Matoušek, Jan Krupička

Academy of Sciences of Czech Republic, Prague, Czech Republic

Paper No. FEDSM2013-16440, pp. V01CT20A010; 8 pages
doi:10.1115/FEDSM2013-16440
From:
  • ASME 2013 Fluids Engineering Division Summer Meeting
  • Volume 1C, Symposia: Gas-Liquid Two-Phase Flows; Industrial and Environmental Applications of Fluid Mechanics; Issues and Perspectives in Automotive Flows; Liquid-Solids Flows; Multiscale Methods for Multiphase Flow; Noninvasive Measurements in Single and Multiphase Flows; Numerical Methods for Multiphase Flow; Transport Phenomena in Energy Conversion From Clean and Sustainable Resources; Transport Phenomena in Materials Processing and Manufacturing Processes; Transport Phenomena in Mixing; Turbulent Flows: Issues and Perspectives
  • Incline Village, Nevada, USA, July 7–11, 2013
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-5556-0
  • Copyright © 2013 by ASME

abstract

In summer 2012, an extensive measurement campaign was carried out in a new test loop composed of pipes of the internal diameter of 100 mm. Four fractions of glass ballotini were used for preparation of settling slurries of different properties. During the tests, different patterns of slurry flows were observed. The tests included measurements of concentration profiles in a cross section of the slurry pipe.

The paper analyzes shapes of measured concentration profiles with an aim to recognize flow patterns and dominating particle-dispersion mechanisms in the observed slurry flows. It is shown that particles are supported both through an interaction with the flowing carrier (turbulent dispersion) and through an interaction with other particles (collisional dispersion). A measure of each particular support is quantified through relating a distribution of concentration with a distribution of solids stresses across a flow discharge area in a pipe.

Copyright © 2013 by ASME

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