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JOURNALS // Russian Journal of Nonlinear Dynamics // Archive

Rus. J. Nonlin. Dyn., 2024 Volume 20, Number 1, Pages 3–13 (Mi nd877)

Nonlinear physics and mechanics

Analytical Solution of the Rayleigh – Plesset Equation Filled with Van Der Waals Gas for Various Isoprocesses

M. V. Gasanova, A. G. Gulkanovb, K. A. Modestova

a Moscow State University of Civil Engineering Yaroslavskoe sh. 26, Moscow, 129337 Russia
b Politecnico di Milano, Piazza Leonardo da Vinci 32, Milan, 20133 Italy

Abstract: In this paper, we consider a mathematical model of the dynamics of the behavior of a spher- ically symmetric Rayleigh – Plesset bubble in the van der Waals gas model. The analysis of the model takes into account various isoprocesses without the presence of condensation and a model that takes into account condensation in an isothermal process. In each case, various character- istics are searched for, such as oscillation frequency (linear/small oscillations), damping factor, relaxation time, decrement, and logarithmic decrement. Solutions are found in quadratures for various parameters of the equation. The theoretical results obtained are compared with the results of the numerical solution of the Cauchy problem for various isoprocesses.

Keywords: nonlinear differential equations, exact solution, small fluctuations, van der Waals equation, Rayleigh – Plesset equation

MSC: 34C15, 76E30, 7025

Received: 30.06.2023
Accepted: 19.10.2023

Language: English

DOI: 10.20537/nd231202



© Steklov Math. Inst. of RAS, 2024