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Bubble formation and evolution behavior from vertical wall orifice

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Abstract

Bubble formation is an integral part of the two-phase flow science. Through numerical simulation and experiments using different air flow rates and orifice diameters, the present study aims at investigating the behavior of bubble formation and evolution from vertical wall orifice in quiescent pure water. For the experiments, the images of the bubble formation process under different working conditions were recorded using a high-speed camera and analyzed the entire process. The bubble formation process can be divided into three stages, namely nucleation, stable growth, and necking. According to the obtained results, bubble forms only when the air-phase pressure exceeds the threshold pressure at wall orifice. Due to the influence of the threshold pressure and buoyancy, the bubble volume decreases with an increase in the wall orifice diameter for the same flow rate. Moreover, the volume of fluid method is applied to simulate bubble formation in a three-dimensional model and the “buffer volume” is considered in the simulation model. The simulation results matched well with the experimental data, which proves the existence of threshold pressure and the periodic pressure fluctuation at the wall orifice.

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Authors and Affiliations

  1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China

    Zhao-Wei Ma, Xiao-Ling Wu, Qin Zhang, Guo Yang, Gui-Min Liu, Hua Li & Wei Liu

  2. University of Chinese Academy of Sciences, Beijing, 100049, China

    Zhao-Wei Ma, Xiao-Ling Wu, Qin Zhang & Guo Yang

Authors
  1. Zhao-Wei Ma
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  2. Xiao-Ling Wu
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  3. Qin Zhang
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  4. Guo Yang
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  5. Gui-Min Liu
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  6. Hua Li
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  7. Wei Liu
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Corresponding authors

Correspondence to Gui-Min Liu, Hua Li or Wei Liu.

Additional information

This work was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (No. XDA0202000) and the National Natural Science Foundation of China (No. 11535009).

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Ma, ZW., Wu, XL., Zhang, Q. et al. Bubble formation and evolution behavior from vertical wall orifice. NUCL SCI TECH 30, 183 (2019). https://doi.org/10.1007/s41365-019-0709-9

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