A fate-alternating transitional regime in contracting liquid filaments

ORAL

Abstract

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).

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Presenters

  • 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