Propagation of nonlinear waves in the bubbly liquids

Abstract

An important factor that causes the nonlinearity in the bubbly liquids when the acoustic wave is propagating is the bubbles. So we study the nonlinear propagation of acoustic waves in the bubbly liquids. The influence of the gas content is introduced into the equation of the wave propagation in the liquid, so one can get the model of wave propagation in the bubbly liquids. Through numerical simulation of the model one can get the gas content, the pressure amplitude of driving sound and the acting time of the driving sound can all affect the distribution of the sound field and the pressure amplitude of the wave in the bubbly liquids. The bubbles in the liquid will “block” the acoustic wave to propagate and “gather” the energy near the sound source field. For continuous and high power driving sound, the bubbles in the liquid will “block” the wave propagation and the transmission of energy.