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Pressure and tension waves from bubble collapse near a solid boundary: A numerical approach.
Christiane Lechner1, Max Koch2, Werner Lauterborn2
1Institute of Fluid Mechanics and Heat Transfer, TU Wien, Getreidemarkt 9, 1060 Vienna, Austria.
The Journal of the Acoustical Society of America
|January 1, 2018
Summary
Numerical simulations reveal acoustic waves generated by bubble motion near solid boundaries. The study details bubble collapse dynamics, including microjet formation and rebound, and analyzes resulting pressure and tension waves.
Area of Science:
- Fluid dynamics
- Acoustics
- Computational physics
Background:
- Bubble dynamics near boundaries generate acoustic waves.
- Understanding these phenomena is crucial for various applications.
Purpose of the Study:
- To numerically calculate acoustic waves from bubble motion near a solid boundary.
- To model bubble collapse dynamics and wave propagation.
Main Methods:
- Utilized OpenFOAM for solving Navier-Stokes equations.
- Incorporated Tait equation for nonlinear acoustic wave effects.
- Modeled a small gas bubble obeying an adiabatic law.
Main Results:
- Described bubble growth, microjet formation, and collapse.
- Observed annular nanojet formation and bubble rebound.
- Demonstrated pressure and tension wave generation and propagation.
Conclusions:
- The study successfully modeled complex bubble dynamics and associated acoustic wave generation.
- Numerical simulations provide insights into the physical processes involved in bubble collapse near boundaries.
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