Fingering patterns during droplet impact on heated surfaces

Journal article

Khavari, M., Sun, C., Lohse, D. and Tran, T. 2015. Fingering patterns during droplet impact on heated surfaces. Soft Matter. 11, pp. 3298-3303. https://doi.org/10.1039/c4sm02878c
AuthorsKhavari, M., Sun, C., Lohse, D. and Tran, T.
Abstract

A droplet impinging on a sufficiently heated surface may be cushioned by its own vapor and never touch the surface. In previous work, the transition to this so-called Leidenfrost regime was only qualitatively described as an abrupt change between the “contact-boiling” regime, which is characterized by violent boiling behaviors, and the Leidenfrost state. We reveal that the wetted area can be used as a quantity that quantitatively characterizes this transition and it is a continuous function of surface temperature up to the Leidenfrost regime. The wetted area exhibits fingering patterns caused by vapor flow under the liquid. This underlines the crucial role of vapor transport in the Leidenfrost transition and unveils the physical mechanism of the transition to the Leidenfrost regime.

KeywordsLeidenfrost regime; surface temperature; fingering patterns; vapour flow
Year2015
JournalSoft Matter
Journal citation11, pp. 3298-3303
PublisherRoyal Society of Chemistry
ISSN1744-683X
1744-6848
Digital Object Identifier (DOI)https://doi.org/10.1039/c4sm02878c
Web address (URL)http://dx.doi.org/10.1039/c4sm02878c
Accepted author manuscript
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Open
Output statusPublished
Publication dates12 Mar 2015
Publication process dates
Accepted11 Mar 2015
Deposited30 Nov 2022
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