Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session L12: Drops: Jetting and Break-up
4:05 PM–6:41 PM,
Monday, November 19, 2018
Georgia World Congress Center
Room: B217
Chair: Yue Ling, Baylor University
Abstract ID: BAPS.2018.DFD.L12.6
Abstract: L12.00006 : A fate-alternating transitional regime in contracting liquid filaments*
5:10 PM–5:23 PM
Presenter:
Francesco Paolo Contò
(Queen Mary University of London - School of Engineering and Materials Science)
Authors:
Francesco Paolo Contò
(Queen Mary University of London - School of Engineering and Materials Science)
Fan Wang
(Queen Mary University of London - School of Engineering and Materials Science)
José Rafael Castrejón-Pita
(Queen Mary University of London - School of Engineering and Materials Science)
Yi Sui
(Queen Mary University of London - School of Engineering and Materials Science)
Alfonso Arturo Castrejón-Pita
(University of Oxford - Department of Engineering Science)
The fate of a contracting liquid filament depends on the Ohnesorge number (Oh), the initial aspect ratio (Γ) and surface perturbation. Generally, it is believed that there exists a critical aspect ratio Γc such that longer filaments break up (through Rayleigh-Plateau instability or end-pinching) and shorter ones recoil into a single drop.
Through computational and experimental studies, we report a transitional regime for filaments with a broad range of intermediate aspect ratios. In this regime multiple Γc thresholds exist: a novel breakup mode alternates with no-breakup.
We develop a simple model considering the superposition of capillary waves travelling on the free surface from both ends of the filament. The model can predict and explain all fates and breakup mechanisms of the new phase diagram Oh-Γ.
*This work was supported by the Royal Society, the Chinese Scholarship Council, and the UK Engineering and Physical Science Research Council (EP/P024173/1, EP/K000128/1).
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.L12.6
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