Chaotic behavior of gas bubble in non-Newtonian fluid: a numerical study

被引：0
作者：
S. Behnia
F. Mobadersani
M. Yahyavi
A. Rezavand
机构：
[1] Urmia University of Technology,Department of Physics
[2] Urmia University of Technology,Department of Mechanical Engineering
[3] Urmia University,Department of Mechanical engineering
[4] Bilkent University,Department of Physics
[5] Iran University of Science and Technology,Department of Mechanical engineering
来源：
Nonlinear Dynamics | 2013年 / 74卷
关键词：
Bubble dynamics; Non-Newtonian fluids; Chaotic oscillations; Deborah number; Bifurcation diagrams; Lyapunov spectrum;
D O I：
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中图分类号：
学科分类号：
摘要：
In the present paper, the nonlinear behavior of bubble growth under the excitation of an acoustic pressure pulse in non-Newtonian fluid domain has been investigated. Due to the importance of the bubble in the medical applications such as drug, protein or gene delivery, blood is assumed to be the reference fluid. Effects of viscoelasticity term, Deborah number, amplitude and frequency of the acoustic pulse are studied. We have studied the dynamic behavior of the radial response of bubble using Lyapunov exponent spectra, bifurcation diagrams, time series and phase diagram. A period-doubling bifurcation structure is predicted to occur for certain values of the effects of parameters. The results show that by increasing the elasticity of the fluid, the growth phenomenon will be unstable. On the other hand, when the frequency of the external pulse increases the bubble growth experiences more stable condition. It is shown that the results are in good agreement with the previous studies.
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页码：559 / 570
页数：11
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