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Nonlinear ultrasonic waves in water-air mixtures

AutorVanhille, Christian; Campos-Pozuelo, Cleofé
Palabras claveWater-air mixtures
Nonlinear ultrasonic waves
Numerical models
Bubble equation
Linear wave equation
Standing waves
Fecha de publicaciónjul-2008
EditorSociété française d'acoustique
Acoustical Society of America
European Acoustics Association
CitaciónAcoustics '08 Paris Proceedings. Physical Acoustics (PA) ; Session: PA03 - Acoustically Activated Bubble Dynamics and Applications [Poster session]
ResumenIn this paper we present some features of nonlinear ultrasonic waves in water-air mixtures. This analysis is based on the coupling of the linear wave equation to the bubble equation in a volume formulation. The system is solved via the development of a numerical model (SMOW-BL code). The main restrictions of the model are: the nonlinear behaviour comes exclusively from the bubble vibration, all the bubbles have the same size, air inside the bubbles is adiabatic. Continuous waves at low ultrasonic frequency and wide band pulses propagation in an open domain are analysed. Results obtained by considering several bubbly layers in water are given. The existence of soliton in a water-air mixture is demonstrated. Some results corresponding to standing waves are also presented. A model which allows us to consider the self-generation of air bubbles in water, i.e., cavitation, is proposed.
DescripciónCommunication presented at: Acoustics '08 (Paris, France, June 29-July 4, 2008), comprising: 5th Forum Acusticum, 155th ASA Meeting, 9e Congrès Français d'Acoustique, 7th European Conference on Noise Control (Euronoise), 9th European Conference on Underwater Acoustics (ECUA).-- Book of abstracts published in Vol. 94 Suppl.1: S1-S1020 (May/June 2008) of Acta Acustica united with Acustica: The Journal of the European Acoustics Association (ISSN 1610-1928).
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