Ultrasonic wave propagation in colloidal suspensions and emulsions: a comparison of four models

Particle sizing in dense two-phase droplet systems by ultrasonic attenuation and velocity spectra

“…With further efforts by Allegra and Hawlay [8] , the classical ECAH model (Epstein, Carhart, Allegra and Hawley's model) was founded as a theoretical basis of ultrasonic particle sizing. Challis et al [9] , Tebbutt and Challis [10] examined this model through numerical calculation to experimental validation. In the long wave limit, McClements [11,12] contributed an explicit solution for ECAH to be applied in droplet characterization in concentrated emulsions.…”

Ultrasonic characterization of lactose dissolution

“…Ultrasonic spectroscopy has been used to measure the size distribution of emulsions and colloidal dispersions with by means of well-established scattering theories relating the measured ultrasonic properties with the physical properties of the suspension (Challis et al, 2005;McClements and Povey, 1989;Tebbutt and Challis, 1996). This approach has been used to a lesser extent to characterize crystal dispersions.…”

Simulation and On-line Real-time Measurement of Aspirin Crystalline Particle Size Distribution Based on Ultrasound

“…The ECAH model is getting increasing attention [18]. Through the processing of a mathematical model related to the propagation of ultrasonic waves in suspension, the ultrasonic propagation velocity and attenuation coefficient are correlated with the particle characterization, such as particle size distribution and concentration [19]. Its measurement principle can be described as: the physical properties of the continuous phase and the particle are known.…”