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Interaction of Liquid Droplets in Gas and Vapor Flows

Author

Listed:
  • A. V. Demidovich

    (Power Engineering School, National Research Tomsk Polytechnic University, Tomsk 634050, Russia)

  • S. S. Kralinova

    (Power Engineering School, National Research Tomsk Polytechnic University, Tomsk 634050, Russia)

  • P. P. Tkachenko

    (Power Engineering School, National Research Tomsk Polytechnic University, Tomsk 634050, Russia)

  • N. E. Shlegel

    (Power Engineering School, National Research Tomsk Polytechnic University, Tomsk 634050, Russia)

  • R. S. Volkov

    (Power Engineering School, National Research Tomsk Polytechnic University, Tomsk 634050, Russia)

Abstract

We investigated the conditions, characteristics, and outcomes of liquid droplet interaction in the gas medium using video frame processing. The frequency of different droplet collision outcomes and their characteristics were determined. Four interaction regimes were identified: bounce, separation, coalescence, and disruption. Collision regime maps were drawn up using the Weber, Reynolds, Ohnesorge, Laplace, and capillary numbers, as well as dimensionless linear and angular parameters of interaction. Significant differences were established between interaction maps under ideal conditions (two droplets colliding without a possible impact of the neighboring ones) and collision of droplets as aerosol elements. It was shown that the Weber number could not be the only criterion for changing the collision mode, and sizes and concentration of droplets in aerosols influence collision modes. It was established that collisions of droplets in a gaseous medium could lead to an increase in the liquid surface area by 1.5–5 times. Such a large-scale change in the surface area of the liquid significantly intensifies heat transfer and phase transformations in energy systems.

Suggested Citation

  • A. V. Demidovich & S. S. Kralinova & P. P. Tkachenko & N. E. Shlegel & R. S. Volkov, 2019. "Interaction of Liquid Droplets in Gas and Vapor Flows," Energies, MDPI, vol. 12(22), pages 1-24, November.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:22:p:4256-:d:284860
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    References listed on IDEAS

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    1. Xiongjie Fan & Cunxi Liu & Yong Mu & Kaixing Wang & Yulan Wang & Gang Xu, 2019. "Experimental Investigations of Flow Field and Atomization Field Characteristics of Pre-Filming Air-Blast Atomizers," Energies, MDPI, vol. 12(14), pages 1-16, July.
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    4. Joachim Søreng Bjørge & Svein Arne Bjørkheim & Maria-Monika Metallinou & Torgrim Log & Øyvind Frette, 2019. "Influence of Acetone and Sodium Chloride Additives on Cooling Efficiency of Water Droplets Impinging onto Hot Metal Surfaces," Energies, MDPI, vol. 12(12), pages 1-16, June.
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    2. Anastasia Islamova & Svetlana Kropotova & Pavel Strizhak, 2022. "Research into Energy Production from the Combustion of Waste-Derived Composite Fuels," Energies, MDPI, vol. 15(15), pages 1-4, August.
    3. Jiaqing Chang & Rongchang Xu & Jinsheng Cui & Qiaolin Song & Teng Shen, 2022. "Influences of Liquid Viscosity and Relative Velocity on the Head-On Collisions of Immiscible Drops," Energies, MDPI, vol. 15(22), pages 1-18, November.

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