ATTENUATION OF THE ACOUSTIC SIGNAL PROPAGATING THROUGH A BUBBLY LIQUID LAYER

The acoustic signal dynamics in a fi ve-layer medium containing two liquid layers with polydisperse gas bubbles has been investigated. Calculations have been made for the interaction between the pulse perturbation of smallamplitude pressure and a multilayer sample containing two layers of industrial gel with polydisperse air bubbles. It has been shown that a small content of bubbles (about 0.1 vol. %) in a thin gel layer decreases tenfold or more the amplitude of acoustic waves with frequencies close to the resonance frequency of natural oscillations of bubbles. There are frequency ranges thereby where the infl uence of the bubbly layer is insignifi cant.
   
Author:  D. A. Gubaidullin and A. A. Nikiforov
Keywords:  bubbly liquid, acoustic waves, interphase heat and mass transfer, dispersion relation, polydispersity
Page:  201