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Updated: Mar 28, 2026

Simultaneous Measurement of Turbulence and Particle Kinematics Using Flow Imaging Techniques
Published on: March 12, 2019
Measuring two-phase particle flux with a multi-frequency acoustic Doppler profiler
Gregory W Wilson1, Alex E Hay1
1Department of Oceanography, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada.
Abstract:
A methodology is developed and tested for simultaneously extracting time-resolved one-dimensional profiles of the mass-concentration and velocity of two different particle types in a mixed suspension, using a multi-frequency pulse-to-pulse coherent Doppler instrument. The technique involves inversion of a model for frequency-dependent acoustic backscatter amplitude and phase. Results are presented from a laboratory settling column experiment, measuring a mixture of polystyrene beads (slowly-settling, strongly-scattering) and glass beads (quickly-settling, weakly-scattering) in a vertical pipe section.
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