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<p>Due to their small size and large specific surface area, microbubbles are frequently employed in applications such as ship drag reduction, dissolved air flotation for oil removal, ballast water treatment, and exhaust gas denitrification. Precise control over the generation and breakup size of microbubbles, along with ensuring their quality, is crucial for realizing their practical applications. This paper introduces a microbubble generator incorporating V-shaped obstacles and conducts experimental research on microbubble generation and breakup within a microfluidic chip. The experimental results demonstrate that the microfluidic chip can achieve uniform breakup of microbubbles. Based on the experimental data, a predictive correlation for microbubble size has been established, enabling accurate forecasting of daughter bubble sizes under different operating conditions. Through experimental investigations, factors influencing the microbubble breakup process were studied, and the effects of the two-phase inlet pressure ratio and liquid-phase viscosity on the breakup cycle were explored. It was found that the breakup cycle of microbubbles increases with an elevation in the gas-liquid pressure ratio and decreases with an increase in liquid-phase viscosity.</p>

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Experimental study of bubble generation and breakup in microbubble generator with V-shaped obstacle

  • 期刊论文

  • 发表日期：

    2026年3月12日

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  • Yuhang Zhong,
  • Wei Li,
  • Jiayuan Wang,
  • Jingsi Wang,
  • Bingqing Zhao,
  • Xin Wang,
  • Bo Liu,
  • Hongpeng Zhang

摘要

Due to their small size and large specific surface area, microbubbles are frequently employed in applications such as ship drag reduction, dissolved air flotation for oil removal, ballast water treatment, and exhaust gas denitrification. Precise control over the generation and breakup size of microbubbles, along with ensuring their quality, is crucial for realizing their practical applications. This paper introduces a microbubble generator incorporating V-shaped obstacles and conducts experimental research on microbubble generation and breakup within a microfluidic chip. The experimental results demonstrate that the microfluidic chip can achieve uniform breakup of microbubbles. Based on the experimental data, a predictive correlation for microbubble size has been established, enabling accurate forecasting of daughter bubble sizes under different operating conditions. Through experimental investigations, factors influencing the microbubble breakup process were studied, and the effects of the two-phase inlet pressure ratio and liquid-phase viscosity on the breakup cycle were explored. It was found that the breakup cycle of microbubbles increases with an elevation in the gas-liquid pressure ratio and decreases with an increase in liquid-phase viscosity.