Abstract
The utilization of the laser-Doppler velocimetry technique in concentrated suspensions facilitated a direct measurement of particle migration velocities. Velocity measurements of dispersions at moderate and high particle concentrations, in the range of 0.3 < φs < 0.50, showed a direct connection between particle lateral migration and changes in suspension velocity profiles. The longitudinal profiles lose their Newtonian shape at high concentrations. A qualitative agreement is shown in this work between the measured lateral and longitudinal velocity profiles and model calculations based on a phenomenological model.
Original language | English |
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Pages (from-to) | 613-629 |
Number of pages | 17 |
Journal | International Journal of Multiphase Flow |
Volume | 23 |
Issue number | 4 |
DOIs | |
State | Published - 1997 |
Externally published | Yes |
Keywords
- Concentrated suspensions
- Laser-Doppler velocimetry
- Particles migration
- Viscous flow