Resonance scattering characteristics of double-layer spherical particles--颗粒学报PARTICUOLOGY

Dong, X., Su, M., & Cai, X. (2012). Resonance scattering characteristics of double-layer spherical particles. Particuology, 10(1), 117–126. https://doi.org/10.1016/j.partic.2011.08.004

Resonance scattering characteristics of double-layer spherical particles

Xuejin Dong, Mingxu Su^*, Xiaoshu Cai

Institute of Particle and Two-Phase Flow Measurement, University of Shanghai for Science and Technology, Shanghai 200093, China

10.1016/j.partic.2011.08.004

Volume 10, Issue 1, February 2012, Pages 117-126

Received 29 September 2009, Revised 9 July 2011, Accepted 25 August 2011, Available online 15 January 2012.

E-mail: sumingxu2002@yahoo.com

Highlights

► The resonance frequency for monodisperse particles is related to the particle size.

► We expand the resonance simulation to polydisperse particles.

► The resonance peak is affected by sizes, coverage and concentration of particles.

Abstract

Based on the principle of ultrasonic resonance scattering, sound-scattering characteristics of double-layer spherical particles in water were numerically studied in this paper. By solving the equations of the scattering matrix, the scattering coefficient determined by the boundary conditions can be obtained, thus the expression for the sound-scattering function of a single double-layer spherical particle can be derived. To describe the resonance scattering characteristics of a single particle, the reduced scattering cross section and reduced extinction cross section curves were found through numerical calculation. Similarly, the numerically calculated sound attenuation coefficient curves were used to depict the resonance scattering characteristics of monodisperse and polydisperse particles. The results of numerical calculation showed that, for monodisperse particles, the strength of the resonance was mainly related to the particle size and the total number of particles; while for polydisperse particles, it was primarily affected by the particle size, the coverage of the particle size distribution and the particle concentration.

Graphical abstract

Keywords

Ultrasonic; Resonance scattering; Double-layer; Polydisperse; Visco-elastic

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