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Article Dans Une Revue International Journal of Multiphase Flow Année : 2024

Finite amplitude wave propagation through bubbly fluids

Siew-Wan Ohl
Juan Manuel Rosselló
Daniel Fuster

Résumé

The existence of only a few bubbles could drastically reduce the acoustic wave speed in a liquid. Wood's equation models the linear sound speed, while the speed of an ideal shock waves is derived as a function of the pressure ratio across the shock. The common finite amplitude waves lie, however, in between these limits. We show that in a bubbly medium, the high frequency components of finite amplitude waves are attenuated and dissipate quickly, but a low frequency part remains. This wave is then transmitted by the collapse of the bubbles and its speed decreases with increasing void fraction. We demonstrate that the linear and the shock wave regimes can be smoothly connected through a Mach number based on the collapse velocity of the bubbles.
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Dates et versions

hal-04257279 , version 1 (25-10-2023)
hal-04257279 , version 2 (25-04-2024)

Identifiants

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Siew-Wan Ohl, Juan Manuel Rosselló, Daniel Fuster, Claus-Dieter Ohl. Finite amplitude wave propagation through bubbly fluids. International Journal of Multiphase Flow, 2024, pp.104826. ⟨10.48550/arXiv.2308.10662⟩. ⟨hal-04257279v2⟩
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