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Proceedings of the 10th International Symposium on Cavitation (CAV2018)

Editor
Joseph Katz
Joseph Katz
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ISBN:
9780791861851
No. of Pages:
1108
Publisher:
ASME Press
Publication date:
2018

The non-spherical dynamics of gas bubbles in soft matter are analytically investigated. We develop a model using Cauchy’s equation of motion in conjunction with a Kelvin-Voigt viscoelastic model, where it is assumed that the soft matter behaves in an irrotational fashion. The model is solved numerically and validated against experiments of non-spherical bubble oscillations in gelatin. The natural frequency of each non-spherical mode is obtained from the model, which is used to predict the unstable mode due to parametric resonance. Furthermore, we investigate the non-spherical bubble dynamics under ultrasound irradiation and examine viscoelastic effects on the time evolution of non-spherical mode amplitudes. Viscosity stabilizes non-spherical oscillations, while elasticity increases the natural frequency, which also changes the unstable mode.

Introduction
Physical Model
Results and Discussion
Conclusion
Acknowledgement
References
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