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Numerical investigation of freely moving particle–droplet interaction with initial contact

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Abstract

We simulated freely moving particle–droplet interaction with initial contact. Fluid–structure interaction was modeled by fictitious domain method, and two-fluid interface was tracked using Level Contour Reconstruction Method. For tracking movement of the solid object, additional object distance function was calculated at Eulerian grid center. Since simple geometry, i.e., circle, was used in this study, object distance function can be easily computed from center location updated by averaged velocity to constrain solid movement. The interaction phenomenon was simplified as center-to-center contact without initial velocity. The gravitational acceleration was also ignored. We choose the size ratio and Ohnesorge (Oh) number as main parameters. Two characteristic behaviors were captured: the merging and separation case. Each velocity of the particle and droplet was shown to see the detailed evolution for merging and separation. In addition, two major forces acting on the particle, a capillary force and inertial force, were analyzed.

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Acknowledgements

This work is supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2017R1D1A1B03028518).

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Authors and Affiliations

  1. Department of Mechanical Engineering, Hongik University, Seoul, South Korea

    Geunhyeok Choi

  2. Department of Mechanical and System Design Engineering, Hongik University, Seoul, South Korea

    Seungwon Shin

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  1. Geunhyeok Choi
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  2. Seungwon Shin
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Correspondence to Seungwon Shin.

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Choi, G., Shin, S. Numerical investigation of freely moving particle–droplet interaction with initial contact. JMST Adv. 1, 57–63 (2019). https://doi.org/10.1007/s42791-019-0003-3

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  • DOI: https://doi.org/10.1007/s42791-019-0003-3

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