中国物理B ›› 2010, Vol. 19 ›› Issue (5): 54302-054302.doi: 10.1088/1674-1056/19/5/054302

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

黄蓓, 张艳丽, 章东, 龚秀芬   

  1. Institute of Acoustics, Key Laboratory of Modern Acoustics (Nanjing University), Ministry of Education, Nanjing University, Nanjing 210093, China
  • 收稿日期:2009-07-15 修回日期:2009-09-28 出版日期:2010-05-15 发布日期:2010-05-15
  • 基金资助:
    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).

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)   

  1. Institute of Acoustics, Key Laboratory of Modern Acoustics (Nanjing University), Ministry of Education, Nanjing University, Nanjing 210093, China
  • Received:2009-07-15 Revised:2009-09-28 Online:2010-05-15 Published:2010-05-15
  • Supported by:
    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).

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摘要： 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.

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.

Key words: bound encapsulated microbubble, acoustic scattering, finite element model

中图分类号:  (Ultrasonography)

  • 87.63.D-
43.80.Qf (Medical diagnosis with acoustics) 43.25.Yw (Nonlinear acoustics of bubbly liquids) 02.70.Dh (Finite-element and Galerkin methods)