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Application of acoustic techniques to fluid-particle systems – A review by Fria Hossein; Massimiliano Materazzi; Paola Lettieri; Panagiota Angeli is a Engineering article available to read on EtoBox.

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Acoustic methods applied to opaque systems have attracted the attention of researchers in fluid mechanics. In particular, owing to their ability to characterise in real-time, nontransparent and highly concentrated fluid-particle systems, they have been applied to the study of complex multiphase flows such as fluidised beds. This paper gives an overview of the physical principles and typical challenges of ultrasound and acoustic emission AE methods when applied to fluid-particle systems. The principles of ultrasound imaging are explained first. The measurement techniques and signal processing methodologies for obtaining velocity profiles, size distribution of the dispersed phases, and solid volume fraction are then discussed. The techniques are based on the measurement of attenuation, sound speed, frequency shift, and transit time of the propagated sound wave. A description of the acoustic emission technique and applications to fluid-particle systems are then discussed. Finally, extensions and future opportunities of the acoustic techniques are presented.

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Author

Fria Hossein; Massimiliano Materazzi; Paola Lettieri; Panagiota Angeli

Publisher

Elsevier BV

Published

2021

Language

EN

Field

Engineering (Physical Sciences)