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Bubble collapse near a solid boundary: a numerical study of the influence of viscosity

Abstract : The effect of viscosity on jet formation for bubbles collapsing near solid boundaries is studied numerically. A numerical technique is presented which allows the Navier-Stokes equations with free-surface boundary conditions to be solved accurately and efficiently. Good agreement is obtained between experimental data and numerical simulations for the collapse of large bubbles. However, it is shown that compressible and thermal effects must be taken into account in order to describe the energy dissipation occurring during jet impact correctly. A parametric study of the effect of viscosity on jet impact velocity is undertaken. The jet impact velocity is found to decrease as viscosity increases and above a certain threshold jet impact is impossible. We study how this critical Reynolds number depends on the initial radius and the initial distance from the wall. A simple scaling law is found to link this critical Reynolds number to the other non-dimensional parameters of the problem.
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Contributor : Stéphane Popinet <>
Submitted on : Tuesday, February 7, 2017 - 6:06:14 PM
Last modification on : Thursday, December 10, 2020 - 11:07:43 AM
Long-term archiving on: : Monday, May 8, 2017 - 3:20:17 PM


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S. Popinet, S. Zaleski. Bubble collapse near a solid boundary: a numerical study of the influence of viscosity. Journal of Fluid Mechanics, Cambridge University Press (CUP), 2002, 464, pp.137-163. ⟨10.1017/S002211200200856X⟩. ⟨hal-01445438⟩



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