Fingering patterns during droplet impact on heated surfaces

Soft Matter
Mohammad KhavariTuan Tran

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.

References

Mar 10, 2012·Physical Review Letters·Tuan TranDetlef Lohse
Mar 10, 2012·Physical Review Letters·John M KolinskiL Mahadevan
Apr 22, 2014·Physical Review Letters·John M KolinskiShmuel M Rubinstein

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Citations

Dec 24, 2015·Biomicrofluidics·Doojin LeeAmy Q Shen
Jun 21, 2017·Proceedings of the National Academy of Sciences of the United States of America·Samira Shiri, James C Bird
Sep 25, 2017·Soft Matter·Michiel A J van LimbeekDetlef Lohse
Feb 27, 2016·Physical Review Letters·Minori ShirotaDetlef Lohse
Apr 20, 2019·Physical Review. E·Lu QiuFei Duan
May 10, 2017·The European Physical Journal. E, Soft Matter·Minori ShirotaChao Sun
Aug 8, 2020·Soft Matter·Sang-Hyeon LeeJung Ho Je
Jan 20, 2018·Physical Review. E·Mohammad Khavari, Tuan Tran
May 18, 2021·ACS Applied Materials & Interfaces·Minjie LiuZuankai Wang

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