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Cavity dynamics of water drop impact onto immiscible oil pool with different viscosity

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Abstract

In this work, we numerically study the impact of a water droplet onto a deep oil pool. Two fluids are immiscible and the viscosity of the pool liquid is changed systematically. We focus on the cavity dynamics during the impact and especially the effects of the pool liquid viscosity and the impacting velocity. For the parameter range explored, we identify the regime where splashing occurs with corolla breaking into droplets, and the regime where no splashing is observed. Similarity is found for the time evolution of cavity depth for fixed impact velocity and different viscosity, if the cavity depth and time are nondimensionalized by the maximal depth and the time when the maximal depth is reached. Effective power-law scalings are also proposed to describe the dependence of the maximal cavity depth and the corresponding time on the impact velocity and pool liquid viscosity, in the term of Froude and Reynolds numbers.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grants 91848201, 11988102, 11521202, 11872004, and 11802004). The authors also acknowledge the partial support from the Beijing Natural Science Foundation (Grants L172002). The numerical simulations were performed on Tianhe-1A, the National Super Computing Center in Tianjin, China. Muhammad Mohasan would like to thank Chinese Scholarship Council for providing Chinese Government Scholarship.

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Authors and Affiliations

  1. SKLTCS and Department of Mechanics and Engineering Science, BIC-ESAT, College of Engineering, Peking University, Beijing, 100871, China

    Muhammad Mohasan, Anas Bin Aqeel, Pengyu Lv, Yantao Yang & Huiling Duan

  2. National University of Sciences and Technology, H-12, Islamabad, Pakistan

    Anas Bin Aqeel

  3. Key Laboratory of High Energy Density Physics Simulation, Center for Applied Physics and Technology, Peking University, Beijing, 100871, China

    Huiling Duan

Authors
  1. Muhammad Mohasan
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  2. Anas Bin Aqeel
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  3. Pengyu Lv
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  4. Yantao Yang
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  5. Huiling Duan
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Corresponding authors

Correspondence to Pengyu Lv or Yantao Yang.

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Executive Editor: Ke-Qing Xia.

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Mohasan, M., Aqeel, A.B., Lv, P. et al. Cavity dynamics of water drop impact onto immiscible oil pool with different viscosity. Acta Mech. Sin. 37, 447–455 (2021). https://doi.org/10.1007/s10409-020-01032-4

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  • DOI: https://doi.org/10.1007/s10409-020-01032-4

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