Monte-Carlo Simulation of Multiple Scattering of Ultrasound by Particles in Liquid-solid Two-phase Flow

Abstract

For the study of complex sound scattering phenomena, the Monte Carlo method has been investigated to establish a novel particle size characterization model in concentrated particulate two-phase flow. Starting from the single particle scattering theory, the numerical simulation was carried out to predict the acoustic attenuation characteristics in the two-phase system of glass bead / water with different particle sizes, concentrations and ultrasonic frequencies. Through the comparison of the ECAH model of single scattering theory, it was found that they were in good agreement at volume concentration of φ=1%, while a clear divergence occurred with the increase of the concentration. At the same time, closer results with Lloyd & Berry's complex scattering correction model can be observed over the whole concentration range, which indicates that the proposed Monte Carlo method can be used for numerical modelling of particle size measurement in the complex scattering condition.