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Nonlinear evolution equations of the fourth order and its partial cases arederived for describing nonlinear pressure waves in a mixture liquid and gasbubbles. Influence of viscosity and heat transfer is taken into account. Exactsolutions of nonlinear evolution equation of the fourth order are found bymeans of the simplest equation method. Properties of nonlinear waves in aliquid with gas bubbles are discussed.

Nonlinear evolution equations for describing waves in bubbly liquids with viscosity and heat transfer consideration