Thermodynamically non-equilibrium bubble medium

A model is developed for a thermodynamically locally-nonequilibrium two-temperature two-velocity bubble medium. The mathematical model is formulated in two stages. In the first stage, a quasiequilibrium model is deduced from the variational principle. In the second stage, locally non-equilibrium exchange terms are introduced into the equations obtained. From the general model thus formulated, one can obtain simpler equations (equations of the theories of long or short waves, etc.) using asymptotic and other methods.