Acoustic waves in two-fraction bubble liquid with phase transformations

The propagation of acoustic waves in two-fraction mixtures of liquid with vapor-gas and gas bubbles of different sizes and compositions with phase transformations has been studied. A system of the differential equations of the motion of the mixture is presented, and the dispersion relation is deduced. Two local maxima in the frequency dependence of the attenuation coefficient for the case of the two-fraction mixture of water with vapor-gas bubbles of air and helium bubbles are revealed. The evolution of the weak pulsed perturbations of the pressure in this mixture was calculated numerically. It was established that the substitution of part of the vapor-gas bubbles in the monodisperse bubble mixture with phase transitions for inert gas bubbles can lead to both a decrease and an increase in the attenuation coefficient in the low-frequency region depending on the sort of gas.