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Experimental and Computational Multiphase Flow

, Volume 2, Issue 4, pp 247–254 | Cite as

Experiment study of droplet impacting on a static hemispherical liquid film

  • Huang Zhang
  • Jianxin Li
  • Qianfeng LiuEmail author
Research Article
  • 135 Downloads

Abstract

Experiment study of a droplet impacting on a static hemispherical liquid film was conducted. The static hemispherical liquid film was formed by a first droplet impacting on a dry solid surface, and the diameter, impact velocity, and liquid properties of the second droplet were the same with the first one. A high-speed camera was used to capture the deformation process of the impacting droplet at a shooting speed of 4000 frames per second. The effects of droplet Weber number and Reynolds number on the spread factor and flatness factor were analyzed quantitatively. The result shows that as increasing of droplet Weber number, the phenomena of spread, formation of liquid crown, and splashing occurred subsequently after the droplet impacted on the liquid film. The maximum spread factor of the liquid film after droplet impacting on the static hemispherical liquid film is higher comparing to the case of droplet impacting on the dry solid surface under the same impacting condition. Further, with the increase of droplet Weber number, the maximum spread factor of the liquid film increases. With the decrease of droplet Reynolds number, the maximum spread factor of the liquid film d ecreases and formation of the liquid crown is inhabited.

Keywords

droplet impact static hemispherical liquid film spread factor flatness factor 

Notes

Acknowledgements

This work was supported by Open Fund (PLC20190602) of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Chengdu University of Technology), and Natural Science Foundation of Beijing (Grant Nos. 3194054 and 3184051).

References

  1. Aboud, D. G. K., Kietzig, A. M. 2015. Splashing threshold of oblique droplet impacts on surfaces of various wettability. Langmuir, 31: 10100–10111.CrossRefGoogle Scholar
  2. Antonini, C., Amirfazli, A., Marengo, M. 2012. Drop impact and wettability: From hydrophilic to superhydrophobic surfaces. Phys Fluids, 24: 102104.CrossRefGoogle Scholar
  3. Bird, J. C., Tsai, S. S. H., Stone, H. A. 2009. Inclined to splash: Triggering and inhibiting a splash with tangential velocity. New J Phys, 11: 063017.CrossRefGoogle Scholar
  4. Castrejón-Pita, J. R., Kubiak, K. J., Castrejón-Pita, A. A., Wilson, M. C. T., Hutchings, I. M. 2013. Mixing and internal dynamics of droplets impacting and coalescing on a solid surface. Phys Rev E, 88: 023023.CrossRefGoogle Scholar
  5. Fujimoto, H., Ogino, T., Takuda, H., Hatta, N. 2001. Collision of a droplet with a hemispherical static droplet on a solid. Int J Multiphase Flow, 27: 1227–1245.CrossRefGoogle Scholar
  6. Green, S. J., Hetsroni, G. 1995. PWR steam generators. Int J Multiphase Flow, 21: 1–97.CrossRefGoogle Scholar
  7. Josserand, C., Thoroddsen, S. T. 2016. Drop impact on a solid surface. Ann Rev Fluid Mech, 48: 365–391.MathSciNetCrossRefGoogle Scholar
  8. Li, J., Zhang, H., Liu, Q. 2019. Characteristics of secondary droplets produced by a single drop impacting on a static liquid film. Int J Multiphase Flow, 119: 42–55.CrossRefGoogle Scholar
  9. Li, R., Ashgriz, N., Chandra, S., Andrews, J. R., Drappel, S. 2010. Coalescence of two droplets impacting a solid surface. Exp Fluids, 48: 1025–1035.CrossRefGoogle Scholar
  10. Liang, G., Guo, Y., Shen, S. 2014. Dynamic behaviors during a single liquid drop impact on a static drop located on spheres. Exp Therm Fluid Sci, 53: 244–250.CrossRefGoogle Scholar
  11. Liang, G., Mudawar, I. 2016. Review of mass and momentum interactions during drop impact on a liquid film. Int J Heat Mass Tran, 101: 577–599.CrossRefGoogle Scholar
  12. Pasandideh-Fard, M., Qiao, Y. M., Chandra, S., Mostaghimi, J. 1996. Capillary effects during droplet impact on a solid surface. Phys Fluids, 8: 650–659.CrossRefGoogle Scholar
  13. Rieber, M., Frohn, A. 1999. A numerical study on the mechanism of splashing. Int J Heat Fluid Fl, 20: 455–461.CrossRefGoogle Scholar
  14. Rioboo, R., Tropea, C., Marengo, M. 2001. Outcomes from a drop impact on solid surfaces. Atomization Spray, 11: 12.CrossRefGoogle Scholar
  15. Shen, X., Miwa, S., Xiao, Y., Han, X., Hibiki, T. 2019. Local measurements of upward air-water two-phase flows in a vertical 6×6 rod bundle. Exp Comput Multiphase Flow, 1: 186–200.CrossRefGoogle Scholar
  16. Šikalo, Š., Marengo, M., Tropea, C., Ganić, E. 2002. Analysis of impact of droplets on horizontal surfaces. Exp Therm Fluid Sci, 25: 503–510.CrossRefGoogle Scholar
  17. Stow, C. D., Hadfield, M. G. 1981. An experimental investigation of fluid flow resulting from the impact of a water drop with an unyielding dry surface. P Roy Soc A-Math Phy, 373: 419–441.CrossRefGoogle Scholar
  18. Tang, C., Qin, M., Weng, X., Zhang, X., Zhang, P., Li, J., Huang, Z. 2017. Dynamics of droplet impact on solid surface with different roughness. Int J Multiphase Flow, 96: 56–69.CrossRefGoogle Scholar
  19. Thoroddsen, S. T., Etoh, T. G., Takehara, K. 2008. High-speed imaging of drops and bubbles. Ann Rev Fluid Mech, 40: 257–285.MathSciNetCrossRefGoogle Scholar
  20. Tsai, P., Pacheco, S., Pirat, C., Lefferts, L., Lohse, D. 2009. Drop impact upon micro- and nanostructured superhydrophobic surfaces. Langmuir, 25: 12293–12298.CrossRefGoogle Scholar
  21. Vander Wal, R. L., Berger, G. M., Mozes, S. D. 2006. The splash/non-splash boundary upon a dry surface and thin fluid film. Exp Fluids, 40: 53–59.CrossRefGoogle Scholar
  22. Worthington, A. M. 1877. XXVIII. On the forms assumed by drops of liquids falling vertically on a horizontal plate. P R Soc London, 25, 171–178.Google Scholar
  23. Yarin, A. L. 2006. DROP IMPACT DYNAMICS: Splashing, spreading, receding, bouncing.... Ann Rev Fluid Mech, 38: 159–192.MathSciNetCrossRefGoogle Scholar
  24. Yarin, A. L., Weiss, D. A. 1995. Impact of drops on solid surfaces: Self-similar capillary waves, and splashing as a new type of kinematic discontinuity. J Fluid Mech, 283: 141–173.CrossRefGoogle Scholar

Copyright information

© Tsinghua University Press 2019

Authors and Affiliations

  1. 1.Department of Energy, Environmental and Chemical EngineeringWashington University in St. LouisSt. LouisUSA
  2. 2.State Key Laboratory of Oil and Gas Reservoir Geology and ExploitationChengdu University of TechnologyChengduChina
  3. 3.Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Institute of Nuclear and New Energy TechnologyTsinghua UniversityBeijingChina

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