Journal Article

FZJ-2020-01719

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Self-Similar Liquid Lens Coalescence

Hack, M. A. (Corresponding author) ; Tewes, W. ; Xie, Q.FZJ* ; Datt, C. ; Harth, K. ; Harting, J.FZJ* ; Snoeijer, J. H.

2020
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/25065  doi:10.1103/PhysRevLett.124.194502

Abstract: A basic feature of liquid drops is that they can merge upon contact to form a larger drop. In spite of its importance to various applications, drop coalescence on pre-wetted substrates has received little attention. Here, we experimentally and theoretically reveal the dynamics of drop coalescence on a thick layer of a low-viscosity liquid. It is shown that these so-called 'liquid lenses' merge by the self-similar vertical growth of a bridge connecting the two lenses. Using a slender analysis, we derive similarity solutions corresponding to the viscous and inertial limits. Excellent agreement is found with the experiments without any adjustable parameters, capturing both the spatial and temporal structure of the flow during coalescence. Finally, we consider the crossover between the two regimes and show that all data of different lens viscosities collapse on a single curve capturing the full range of the coalescence dynamics.

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Contributing Institute(s):

1. Helmholtz-Institut Erlangen-Nürnberg Erneuerbare Energien (IEK-11)

Research Program(s):

1. 121 - Solar cells of the next generation (POF3-121) (POF3-121)
2. DFG project 422916531 - Adaptive und schaltbare Grenzflächen basierend auf strukturierten Kolloiden (422916531)

Appears in the scientific report 2020

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; Nationallizenz ; SCOAP3 sponsored Journal ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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