Solid–liquid two-phase flow is a one of multiphase flow phenomenon used in the energy and chemical fields. Understanding blockages caused by solid-phase deposition and insufficient liquid-phase flow in pipelines is essential for ensuring operational safety and risk management. This study focuses on developing measurement technology using ultrasound to monitor solid–liquid two-phase flow. This paper presents a method for the real-time measurement of the size of flowing coarse particles, with the aim of achieving solid-phase flowrate measurement in solid–liquid two-phase flows using pulsed ultrasound. The accuracy of the developed measurement method was verified, demonstrating the ability to measure solid phase size with a relative error of 5% in water-resin sphere two-phase flow. Furthermore, it was also demonstrated that the influence on measurement accuracy was minimal, even when micro silica sand particles were introduced as a source of noise.
SAKAMOTO et al. (Wed,) studied this question.