Fluid Mechanics and Transport Phenomena

Mixing of dense binary suspensions: Multi-component hydrodynamics and spatial phase distribution by PEPT

  1. Antonio Guida,
  2. Alvin W. Nienow,
  3. Mostafa Barigou*

Article first published online: 17 NOV 2010

DOI: 10.1002/aic.12456

Issue

AIChE Journal

AIChE Journal

Volume 57, Issue 9, pages 2302–2315, September 2011

Additional Information

How to Cite

Guida, A., Nienow, A. W. and Barigou, M. (2011), Mixing of dense binary suspensions: Multi-component hydrodynamics and spatial phase distribution by PEPT. AIChE J., 57: 2302–2315. doi: 10.1002/aic.12456

Author Information

  1. School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, B15 2TT, U.K.

*School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, B15 2TT, U.K.

Publication History

  1. Issue published online: 3 AUG 2011
  2. Article first published online: 17 NOV 2010
  3. Accepted manuscript online: 7 OCT 2010 12:52PM EST
  4. Manuscript Revised: 17 SEP 2010
  5. Manuscript Received: 1 APR 2010

Funded by

  • The Engineering and Physical Sciences Research Council (UK). Grant Number: GR/S70517/01

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Keywords:

  • binary suspension;
  • mixing;
  • PEPT;
  • Lagrangian tracking;
  • slip velocity;
  • solid–liquid

Abstract

The three-component flow field and spatial phase distribution of binary mixtures of glass particles suspended in water in a stirred vessel have been resolved using positron emission particle tracking (PEPT). The Lagrangian flow data provided by the technique have been converted to give a detailed Eulerian description of each of the three phase components of the flow generated by a pitched blade turbine. For the first time, it has been possible to determine the full 3D velocity and concentration fields of the liquid phase and both the solid components within opaque dense slurries of this type containing up to 40 wt % solids. Spatial distributions of local time-averaged slip velocity have also been obtained for each solid component showing wide variations. The detailed PEPT measurements have enabled the solids mass balance and the mass continuity of the three phase components to be accurately verified throughout the vessel. © 2010 American Institute of Chemical Engineers AIChE J, 2011

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