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Modeling the dynamics of partially wetting droplets on fibers

Christianto, Raymond; Rahmawan, Yudi; Semprebon, Ciro; Kusumaatmaja, Halim

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Authors

Yudi Rahmawan

Ciro Semprebon



Abstract

We simulate gravity-driven dynamics of partially wetting droplets moving along a fiber using the lattice Boltzmann method. For the so-called clamshell morphology, we find three possible dynamic regimes upon varying the droplet Bond number and the fiber radius: compact droplet, droplet breakup, and droplet oscillation. For small Bond numbers, in the compact droplet regime, the droplet reaches a steady state and its velocity scales linearly with the driving body force. We find two scaling laws depending on whether the droplet size is smaller or larger compared to the fiber radius. In addition, we further identify a scaling law applicable for the barrel morphology. For higher Bond numbers, in the droplet breakup regime, satellite droplets are formed trailing the initial moving droplet. We find such droplet satellite formation is easier with increasing fiber curvature (smaller fiber radius). Finally, in the droplet oscillation regime, favored in the midrange of fiber radius, the droplet shape periodically extends and contracts along the fiber.

Citation

Christianto, R., Rahmawan, Y., Semprebon, C., & Kusumaatmaja, H. (2022). Modeling the dynamics of partially wetting droplets on fibers. Physical Review Fluids, 7(10), Article 103606. https://doi.org/10.1103/physrevfluids.7.103606

Journal Article Type Article
Acceptance Date Sep 26, 2022
Online Publication Date Oct 24, 2022
Publication Date 2022-10
Deposit Date Oct 25, 2022
Publicly Available Date Mar 28, 2024
Journal Physical Review Fluids
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 7
Issue 10
Article Number 103606
DOI https://doi.org/10.1103/physrevfluids.7.103606
Related Public URLs https://arxiv.org/abs/2209.10329

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Copyright Statement
Reprinted with permission from the American Physical Society: Christianto, Raymond, Rahmawan, Yudi, Semprebon, Ciro & Kusumaatmaja, Halim (2022). Modeling the dynamics of partially wetting droplets on fibers. Physical Review Fluids 7(10): 103606 © (2022) by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.





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