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Developed ‘laminar’ bubbly flow with non-uniform bubble sizes

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Abstract

Bubbles with different sizes have different dynamic and kinetic behavior in a two-phase bubbly flow. A common two-fluid model based on the uniform bubble size assumption is not suitable for a bubbly flow with non-uniform bubble sizes. To deal with non-uniform bubbly flows, a multi-fluid model is established, with which bubbles are divided into several groups according to their sizes and a set of basic equations is derived for each group of bubbles with almost the same size. Through analyzing the bubble-bubble and bubble-pipe wall interactions, two new constitutive laws for the wall-force and pressure difference between the liquid phase and interface are developed to close the averaged basic equations. The respective phase distributions for each group of bubbles measured by a specially designed three-dimensional photographic method are used to check the model. Comparison between model-predicted values and experimental data shows that the model can describe laminar bubbly flow with non-uniform bubble sizes.

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Authors and Affiliations

  1. Department of Thermal Engineering, Tsinghua University, 100084, Beijing, China

    Luo Rui, Yang Xianyong & Wang Zhou

  2. Institute of Applied Physics and Computational Mathematics, 100088, Beijing, China

    Song Qiang

Authors
  1. Luo Rui
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  2. Song Qiang
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  3. Yang Xianyong
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  4. Wang Zhou
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Correspondence to Luo Rui.

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Luo, R., Song, Q., Yang, X. et al. Developed ‘laminar’ bubbly flow with non-uniform bubble sizes. Sci. China Ser. E-Technol. Sci. 44, 47–54 (2001). https://doi.org/10.1007/BF02916725

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  • DOI: https://doi.org/10.1007/BF02916725

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