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Numerical simulation of single bubble dynamics under acoustic travelling waves
Xiaojian Ma1, Biao Huang1, Yikai Li1
1School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China.
This study uses the CLSVOF method to simulate single bubble dynamics in acoustic travelling waves, revealing distinct oscillation types like volume, shape, and splitting. Results show bubble behavior is influenced by acoustic pressure, wave number, and damping effects.
Area of Science:
- Fluid Dynamics
- Acoustics
- Computational Physics
Background:
- Understanding bubble behavior in acoustic fields is crucial for various applications.
- Acoustic radiation forces significantly influence bubble dynamics.
Purpose of the Study:
- To investigate single bubble dynamics in acoustic travelling waves using the CLSVOF method.
- To analyze bubble oscillation types and their dependence on acoustic parameters.
Main Methods:
- Implementation of the CLSVOF (Constrained Level Set Volume Of Fluid) method.
- Validation of the Naiver-Stokes equation incorporating acoustic radiation force.
- Construction of a regime map based on dimensionless acoustic pressure amplitude and wave number.
Main Results:
- Identified distinct bubble oscillation types: volume, shape, and splitting.
- Observed that bubble translation and jet direction align with wave propagation.
- Demonstrated that damping coefficients induce asymmetry and delay splitting.
Conclusions:
- The CLSVOF method effectively captures bubble dynamics in acoustic travelling waves.
- Acoustic pressure nodes and antinodes influence bubble shape, forming "cross shapes".
- Bubble splitting can significantly increase boundary pressure fluctuations.
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