[1] Yang Li, Yang FangChen Ping, Gu Ning,. Effect of viscoelasticity on nonlinear vibration of single microbubble [J]. Journal of Southeast University (English Edition), 2011, 27 (3): 253-256. [doi:10.3969/j.issn.1003-7985.2011.03.005]

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Effect of viscoelasticity on nonlinear vibration of single microbubble()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

27

Issue:

2011 3

Page:

253-256

Research Field:

Mathematics, Physics, Mechanics

Publishing date:

2011-09-30

Info

Title:

Effect of viscoelasticity on nonlinear vibration of single microbubble

Author(s):

Yang Li;  Yang FangChen Ping;  Gu Ning

State Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096, China
Jiangsu Key Laboratory for Biomaterials and Devices, Southeast University, Nanjing 210096, China

Keywords:

microbubble;  viscoelasticity;  radial oscillation;  harmonic imaging

PACS:

O422.7

DOI:

10.3969/j.issn.1003-7985.2011.03.005

Abstract:

Based on the Church-Hoff model, the nonlinear oscillations of a single encapsulated microbubble with a finite thickness shell are theoretically studied. The effects of viscoelasticity on radial oscillations and the fundamental and harmonic components are researched. The peaks of radial oscillations and magnitudes of power spectra of the fundamental and harmonic components all increase gradually with the shear modulus of shell varying from 0 to 10 MPa by an interval of 0.1 MPa at the same shear viscosity, while they decrease as the shear viscosity increases from 0 to 1 Pa·s by an interval of 0.01 Pa·s at the same shear modulus. The fluctuation ranges of subharmonic and ultraharmonic signals are much larger than both the fundamental and second harmonic components. It means that the effect of viscoelasticity on the subharmonic and ultraharmonic signals is greater than that on the fundamental and second harmonic components. So adjusting the viscoelasticity of the shell is a potential method to obtain a perfect microbubble contrast agent used for the subharmonic and ultraharmonic imaging. Four points with significant fundamental and harmonic components are chosen as an example: a shear viscosity of 0.39 Pa·s with shear modulus of 3.9, 6.6, and 8.6 MPa, respectively; a shear modulus of 6.6 MPa with a shear viscosity of 0.42Pa·s.

References:

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Memo

Memo:

Biographies: Yang Li(1986—), female, graduate; Gu Ning( corresponding author ), male, doctor, professor, guning@seu.edu.cn.
Foundation items: The National Basic Research Program of China(973 Program)(No.2011CB933503), the National Natural Science Foundation of China( No.50872021, 60725101, 31000453 ).
Citation: Yang Li, Yang Fang, Chen Ping, et al. Effect of viscoelasticity on nonlinear vibration of single microbubble[J].Journal of Southeast University(English Edition), 2011, 27(3):253-256.[doi:10.3969/j.issn.1003-7985.2011.03.005]

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