Journal article
Drop impact onto immiscible liquid films floating on pools
- Abstract:
- The interface dynamics of a droplet impacting onto a liquid pool has been well studied, and the common interfacial velocity quantified for the cases when the pool is both the same and a different fluid to the impacting droplet. In this work we investigate, experimentally and computationally, the scenario of a droplet impacting onto a pool of the same fluid coated by a layer of another fluid with various thicknesses. The effect of the film thickness on the penetration velocity of the upper droplet-film interface is measured for experiments and simulations, and carefully compared to theoretical predictions for early-to-moderate timescales in the limiting cases of: (i) zero film thickness, in which the film has no effect and thus behaves like a fluid on same fluid impact, and (ii) infinite film thickness, in which the underlying pool has no effect. For finite layer thickness cases we carefully quantify the transition between the two limiting scenarios, and provide insight into the interfacial and flow quantities of interest, with a robust transitional behaviour observed over a rich parametric landscape. This exploration provides new quantitative insight into the nonlinear behaviour of the multi-fluid systems in newly explored finite thickness regimes, as well as a clear delineation of their effect in the context of the noted distinguished limits, with films of up to one impacting drop diameter in thickness shown to induce meaningful interpretable changes in the resulting post-impact dynamics. We also explore longer timescale features of the lower interface dynamics, revealing comparatively lower velocities and larger film thicknesses as the liquid film viscosity is increased.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 3.0MB, Terms of use)
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(Preview, Supplementary materials, pdf, 2.1MB, Terms of use)
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- Publisher copy:
- 10.1038/s41598-024-62427-y
Authors
+ Royal Society
More from this funder
- Funder identifier:
- https://ror.org/03wnrjx87
- Grant:
- RGF\EA\181002
+ Engineering and Physical Sciences Research Council
More from this funder
- Funder identifier:
- https://ror.org/0439y7842
- Grant:
- EP/S029966/1
- EP/W016036/1
- Publisher:
- Springer Nature
- Journal:
- Scientific Reports More from this journal
- Volume:
- 14
- Issue:
- 1
- Article number:
- 13671
- Publication date:
- 2024-06-13
- Acceptance date:
- 2024-05-15
- DOI:
- EISSN:
-
2045-2322
- Language:
-
English
- Pubs id:
-
2007818
- Local pid:
-
pubs:2007818
- Deposit date:
-
2024-06-12
Terms of use
- Copyright holder:
- Fudge et al
- Copyright date:
- 2024
- Rights statement:
- ©The Author(s), 2024. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.
- Licence:
- CC Attribution (CC BY)
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