A simple scattering model for measuring particle mass fractions in multiphase flows

Area of Science:

• Physics
• Acoustics
• Fluid Dynamics

Background:

• Pulsed ultrasound is a valuable tool for analyzing solid/liquid flows.
• Understanding sound attenuation is crucial for accurate flow characterization.
• Particle properties significantly influence acoustic wave propagation.

Purpose of the Study:

• To develop a theoretical model for pulsed ultrasound attenuation in solid/liquid flows.
• To predict sound attenuation based on particle characteristics (mass fraction, density, size distribution).
• To experimentally validate the theoretical model using Dolomite suspensions.

Main Methods:

• Development of a simple theoretical model for ultrasound attenuation.
• Experimental verification using varying mass fractions (0-10%) of Dolomite particles in water.
• Non-invasive measurement technique using clamped transmitter and receiver arrays on the pipe wall.

Main Results:

• The theoretical model accurately predicts sound attenuation in solid/liquid flows.
• Experimental results demonstrate a linear relationship between sound attenuation and particle mass fraction.
• The proposed model shows good agreement with experimental data for Dolomite suspensions.

Conclusions:

• The developed theoretical model provides a reliable method for predicting ultrasound attenuation in particle-laden flows.
• The findings confirm the linear dependence of attenuation on particle mass fraction.
• The non-invasive technique offers a practical approach for flow analysis.