Highlights • In situ observations of bubble dynamics in ultrasonic emulsification (USE).• Role of gas bubbles with different cavitation modes in USE is revealed.• The chaotic oscillation of gas bubbles… Click to show full abstract
Highlights • In situ observations of bubble dynamics in ultrasonic emulsification (USE).• Role of gas bubbles with different cavitation modes in USE is revealed.• The chaotic oscillation of gas bubbles is the governing cavitation mode in USE.• Increasing gas content in USE generates smaller and more stable emulsion droplets.
               
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