Journal
JOURNAL OF FLUID MECHANICS
Volume 839, Issue -, Pages 561-593Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/jfm.2018.60
Keywords
drops; jets; wakes/jets
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Funding
- Research and Specialist Computing Support service at the University of East Anglia
- Engineering and Physical Sciences Research Council
- Engineering and Physical Sciences Research Council [1537731] Funding Source: researchfish
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During a droplet impact onto a substrate, splashing is known to be caused by the presence of surrounding gas or by surface roughness. Impact occurring in a vacuum onto a smooth rigid wall results in droplet spreading, rather than development of a corona or prompt splash. Here we present an analytical and numerical study of a third potential splashing mechanism, namely elastic deformation of the substrate. An axisymmetric Wagner-style model of droplet impact is formulated and solved using the method of normal modes, together with asymptotic analysis and numerical methods. We highlight the effect that a flexible substrate brings to the contact line velocity and jet behaviour, demonstrating that oscillation of the substrate can cause blow-up of the splash jet which is absent for a rigid substrate and indicate the onset of splashing.
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