Journal of South China University of Technology (Natural Science Edition) ›› 2008, Vol. 36 ›› Issue (8): 128-131.

• Physics • Previous Articles     Next Articles

Effect of Bubble Volume Fraction on Distribution of Ultrasonic Field in Liquid

Peng Jian-xin1  Zhou Guang-ping2  Liang Zhao-feng2    

  1.  1. School of Science, South China University of Technology, Guangzhou 510640, Guangdong, China; 2. Department of Electronic Engineering, Shenzhen Polytechnic, Shenzhen 518055, Guangdong, China
  • Received:2007-07-09 Revised:2007-09-18 Online:2008-08-25 Published:2008-08-25
  • Contact: 彭健新（1968-），男，博士，副教授，主要从事声场的数值模拟、室内声学研究． E-mail:phjxpeng@163．com
  • About author:彭健新（1968-），男，博士，副教授，主要从事声场的数值模拟、室内声学研究．
  • Supported by:

    国家自然科学基金资助项目（10574094）

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Abstract:

When the liquid in a vessel with limited volume is irradiated by ultrasonic, the bubbles in the liquid may cause a damping effect on the ultrasonic wave. In order to reveal the effect of the volume fraction of bubbles on the distribution of ultrasonic field in liquid, the distributions of ultrasonic field in liquid in different conditions are compared and analyzed. It is found that the calculated results considering the damping effect of ultrasonic cavitation bubbles accord well with the experimental ones of aluminum foil erosion in liquid, and that the bubble volume fraction has great effect on the distribution of ultrasonic field in liquid. It is also demonstrated that, when the bubble volume fraction is less than the threshold related to a given ultrasonic frequency in liquid, one can employ the method based on the static linear wave equation to calculate the distribution of ultrasound field in liquid. However, when the volume fraction exceeds the threshold, there exists a significant difference between the calculated results and the actual ones.

Key words: bubble, volume fraction, damping effect, ultrasonic cavitation, ultrasonic field simulation