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Paper IPM / P / 7746

School of Physics

Title:

A New Damping Mechanism in Non-Linear Bubble Dynamics

Author(s):

1 .	A. Moshaii
2 .	M. Taeibi-Rahni

Status:

In Proceedings

Proceeding:

Proceedings of 13th Annual(Internatioanl) Mechanical Engineering Conference-May 2005, Isfahan University of Technology, Isfahan, Iran

Year:

2005

Supported by:

IPM

Abstract:

Non-linear equations of radial motion of a gas bubble in a compressible viscous liquid have been modified considering simultaneous effects of viscosity and compressibility. A new set of equations has been derived including new terms resulted from consideration of the viscosity and compressibility not only at the bubble interface, but also in the bulk of liquid. By performing numerical calculations, it is shown that the new terms exhibit an important damping role at the time of bubble collapse, so that their consideration dramatically weakens the bubble rebounds after the collapse.

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