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An Overall Bubble Diameter Model for the Flow Boiling and Numerical Analysis through Global Information Searching

Author

Listed:
  • Zhexuan Xu

    (State Key Laboratory of Engine, Tianjin University, Tianjin 300072, China)

  • Junhong Zhang

    (State Key Laboratory of Engine, Tianjin University, Tianjin 300072, China
    Renai College, Tianjin University, Tianjin 301636, China)

  • Jiewei Lin

    (State Key Laboratory of Engine, Tianjin University, Tianjin 300072, China)

  • Tianshu Xu

    (State Key Laboratory of Engine, Tianjin University, Tianjin 300072, China)

  • Jingchao Wang

    (State Key Laboratory of Engine, Tianjin University, Tianjin 300072, China)

  • Zefeng Lin

    (State Key Laboratory of Engine, Tianjin University, Tianjin 300072, China)

Abstract

Bubble diameter is important for the three-dimensional nucleate boiling two-phase flow simulation. However, the bubble diameter is rarely considered as a variable because it is difficult to estimate. In this paper, a novel bubble diameter model is proposed for the boiling flow. The heat transfer growth, the breakup or coalescence of collision and the liquid impacting separation are considered as the factors affecting the bubble diameter, and three bubble diameter sub-models are developed to calculate the overall bubble diameter based on a departure diameter. In the model, the heat transfer growth is calculated after estimating the bubble location. The collision variation is deduced from the interfacial area concentration equation. The liquid impacting variation is calculated through phase interaction force and gas viscous force. The proposed model is conducted through global information searching in the flow boiling simulation and validated using the void fraction and temperature data from the literature. The effects of the heat transfer growth, the collision, and the separating volume on the bubble diameter are discussed.

Suggested Citation

  • Zhexuan Xu & Junhong Zhang & Jiewei Lin & Tianshu Xu & Jingchao Wang & Zefeng Lin, 2018. "An Overall Bubble Diameter Model for the Flow Boiling and Numerical Analysis through Global Information Searching," Energies, MDPI, vol. 11(5), pages 1-20, May.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:5:p:1297-:d:147913
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    Citations

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    Cited by:

    1. Boštjan Zajec & Leon Cizelj & Boštjan Končar, 2022. "Experimental Analysis of Flow Boiling in Horizontal Annulus—The Effect of Heat Flux on Bubble Size Distributions," Energies, MDPI, vol. 15(6), pages 1-12, March.
    2. Giuseppe Starace & Lorenzo Carrieri & Gianpiero Colangelo, 2020. "Semi-Analytical Model for Heat and Mass Transfer Evaluation of Vapor Bubbling," Energies, MDPI, vol. 13(5), pages 1-17, March.

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