Experimental Study on the Influence of Uniformity Liquid Distribution on the Flow Pattern Conversion of Horizontal Tube

  • Zhennan Qu
  • Zhixian MaEmail author
  • Jili Zhang
Conference paper
Part of the Environmental Science and Engineering book series (ESE)


This paper experimentally studied the effect of non-uniform liquid distribution on the evolution of the falling film flow mode transition on an array of horizontal tubes. A dedicated experimental bench was designed and built to observe the falling film flow pattern. A smooth copper tube with an outer diameter of 19.05 mm, a tube length of 280 mm, and a tube spacing of 10 mm was selected as the test tube. The experimental results showed that the law of the flow pattern evolution under the non-uniform liquid distribution condition is significantly different from that under the uniform liquid distribution condition: When the mass flow of water gradually increases, the transitional Re of the droplet to droplet-column flow pattern conversion is 5.93% lower than that under uniform liquid distribution condition, the transitional Re of the droplet-column to column flow pattern conversion is 55.7% higher than that under uniform liquid distribution condition, the transitional Re of the column to column-sheet flow pattern conversion is 12.4% higher than that under uniform liquid distribution condition, and the transitional Re of column-sheet to sheet flow pattern conversion is 26.2% higher than that under uniform liquid distribution condition. This paper provides a reference for establishing a more accurate condensation heat transfer model of horizontal tube bundle.


Liquid distributor Horizontal tube Flow mode Falling film Reynolds number 



The project is supported by National Natural Science Foundation of China (51606029).


  1. 1.
    Kutateladze, S.S., et al.: The influence of condensate flow rate on heat transfer in film condensation of stationary vapour on horizontal tube banks. Int. J. Heat Mass Transf. (1985)Google Scholar
  2. 2.
    Mitrovic, J.: Influence of tube spacing and flow rate on heat transfer from a horizontal tube to a falling liquid film. In: International Heat Transfer Conference, San Francisco, vol. 4, 1949–1956 (1986)Google Scholar
  3. 3.
    Marto, P.J.: Recent progress in enhancing film condensation heat transfer on horizontal tubes. Heat Transf. Eng. 7, 53–63 (1986)CrossRefGoogle Scholar
  4. 4.
    Honda, H., et al.: Film condensation of R-113 on in-line bundles of horizontal finned tubes. ASME J. Heat Transf. 113, 479–486 (1991)CrossRefGoogle Scholar
  5. 5.
    Rogers, J.T., et al.: Turbulent falling film flow and heat transfer on horizontal tubes. In: National Heat Transfer Conference, vol. 12, ASME HTD-vol. 314, 3–12 1995Google Scholar
  6. 6.
    Mitrovic, J., et al.: Fluid dynamics and condensation heating of capillary liquid jets. Int. J. Heat Mass Transf. 38, 1483–1494 (1995)CrossRefGoogle Scholar
  7. 7.
    Hu, X., Jacobi, A.M.: The intertube falling film: part 1-flow characteristics, mode transitions, and hysteresis. ASME J. Heat Transf. 118, 616–625 (1996)CrossRefGoogle Scholar
  8. 8.
    Roques, J.F., Thome, J.R.: Falling film transitions between droplet, column, and sheet flow modes on a vertical array of horizontal 19 fpi and 40 fpi low-finned tubes. Heat Transf. Eng. 24(6), 40–45 (2003)CrossRefGoogle Scholar
  9. 9.
    Chen, J.D., et al.: Falling film mode transitions on horizontal enhanced tubes with two-dimensional integral fins: effect of tube spacing and fin structures. Exp. Therm. Fluid Sci. (2018)Google Scholar

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© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  1. 1.Institute of Building Energy, Dalian University of TechnologyDalianChina

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