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Chin. Phys. B, 2010, Vol. 19(5): 054302    DOI: 10.1088/1674-1056/19/5/054302

Finite element modeling of acoustic scattering from an encapsulated microbubble near rigid boundary

Huang Bei(黄蓓), Zhang Yan-Li(张艳丽), Zhang Dong(章东), and Gong Xiu-Fen(龚秀芬)
Institute of Acoustics, Key Laboratory of Modern Acoustics (Nanjing University), Ministry of Education, Nanjing University, Nanjing 210093, China
Abstract  This article proposes a finite element model (FEM) for predicting the acoustic scattering from an encapsulated microbubble near rigid boundary. The validity of the model is first examined by comparing the acoustic nonlinear response of a free microbubble with that obtained by the Church model. Then this model is used to investigate the effect of the rigid boundary on acoustic scattering signals from microbubble. The results indicate that the resonance frequency decreases while the oscillation amplitude increases as the microbubble approaches the rigid boundary. In addition, the fundamental component of the acoustic scattering signal is enhanced compared with that of the free microbubble.
Keywords:  bound encapsulated microbubble      acoustic scattering      finite element model  
Received:  15 July 2009      Revised:  28 September 2009      Accepted manuscript online: 
PACS:  87.63.D- (Ultrasonography)  
  43.80.Qf (Medical diagnosis with acoustics)  
  43.25.Yw (Nonlinear acoustics of bubbly liquids)  
  02.70.Dh (Finite-element and Galerkin methods)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No.~10774071), the National Basic Research Prgram 973 (Grant No.~2010CB732600) from Ministry of Science and Technology, China, the Natural Science Foundation of Jiangsu Province, China (Grant No.~BK2007518), and the State Key Laboratory of Acoustics (Grant No.~200902).

Cite this article: 

Huang Bei(黄蓓), Zhang Yan-Li(张艳丽), Zhang Dong(章东), and Gong Xiu-Fen(龚秀芬) Finite element modeling of acoustic scattering from an encapsulated microbubble near rigid boundary 2010 Chin. Phys. B 19 054302

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