scholarly journals Combination and simultaneous resonances of gas bubbles oscillating in liquids under dual-frequency acoustic excitation

2017 ◽  
Vol 35 ◽  
pp. 431-439 ◽  
Author(s):  
Yuning Zhang ◽  
Yuning Zhang ◽  
Shengcai Li
Keyword(s):  
Gas Bubbles ◽  
Acoustic Excitation ◽  
Dual Frequency ◽  
Simultaneous Resonances

scholarly journals Instability of interfaces of gas bubbles in liquids under acoustic excitation with dual frequency

2015 ◽  
Vol 23 ◽  
pp. 16-20 ◽  
Author(s):  
Yuning Zhang ◽  
Xiaoze Du ◽  
Haizhen Xian ◽  
Yulin Wu
Keyword(s):  
Gas Bubbles ◽  
Acoustic Excitation ◽  
Dual Frequency

A Generalized Equation for Scattering Cross Section of Spherical Gas Bubbles Oscillating in Liquids Under Acoustic Excitation

2013 ◽  
Vol 135 (9) ◽  
Author(s):  
Yuning Zhang
Keyword(s):  
Cross Section ◽  
Acoustic Waves ◽  
Ambient Pressure ◽  
Gas Bubbles ◽  
Resonance Region ◽  
Generalized Equation ◽  
Scattering Cross Section ◽  
Acoustic Excitation ◽  
Spherical Waves ◽  
Scattering Cross

When irradiated by acoustic waves, gas bubbles can generate divergent spherical waves, which are frequently used to detect the sizes and number density of the gas bubbles. In this paper, a generalized equation for scattering cross section of spherical gas bubbles oscillating in liquids under acoustic excitation is proposed. Comparing with formulas in the literature, this generalized equation can improve the predictions of acoustical scattering cross section in the near-resonance region with high ambient pressure and above-resonance region.

A General Approach for Rectified Mass Diffusion of Gas Bubbles in Liquids Under Acoustic Excitation

2014 ◽  
Vol 136 (4) ◽  
Author(s):  
Yuning Zhang ◽  
Shengcai Li
Keyword(s):  
Biomedical Engineering ◽  
Thermal Effects ◽  
Gas Bubbles ◽  
Mass Diffusion ◽  
Present Approach ◽  
Acoustic Excitation ◽  
Gas Bubble ◽  
Bubble Motion ◽  
Acoustic Dissipation ◽  
Bubble Oscillations

Rectified mass diffusion serves as an important mechanism for dissolution or growth of gas bubbles under acoustic excitation with many applications in acoustical, chemical and biomedical engineering. In this paper, a general approach for predicting rectified mass diffusion phenomenon is proposed based on the equation of bubble motion with liquid compressibility. Nonuniform pressure inside gas bubbles is considered in the approach through employing a well-established framework relating with thermal effects during gas bubble oscillations. Energy dissipation mechanisms (i.e., viscous, thermal, and acoustic dissipation) and surface tension are also included in the approach. Comparing with previous analytical investigations, present approach mainly improves the predictions of rectified mass diffusion in the regions far above resonance and regions with frequencies megahertz and above. Mechanisms for the improvements are shown and discussed together with valid regions and limitations of present approach.

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