Numerical and Physical Simulations of Nano-whiskers' Dispersion Under High Intensity Ultrasonic

Abstract

High intensity ultrasonic processing is a good way to fabricate nano-composite. In order to study the dispersion process of nano-whiskers under high intensity ultrasonic, numerical and physical simulations of nano-whiskers' dispersion under high intensity ultrasonic were carried out by using glycerol as fluid medium. The numerical simulation results show that ultrasonic forces the fluid to flow along the center line-bottom-wall-center line route and flow velocity is the maximum near the probe tip edge. Besides, the flow velocity increases with the increase of ultrasonic power. The physical simulation results are in good agreement with the numerical simulation results. In addition, cavitation as well as convection is found in the glycerol during the ultrasonic processing; the nano-whiskers are dispersed well in the glycerol under ultrasonic, and the time for fully dispersion decreases with the increase of ultrasonic power.

Keywords

• ultrasonic dispersion
• nano-wisker
• numerical simulation
• physical simulation