Abstract
AbstractA liquid droplet dispensed over a sufficiently hot surface does not make contact but instead hovers on a cushion of its own self-generated vapor. Since its discovery in 1756, this so-called Leidenfrost effect has been intensively studied. Here we report a remarkable self-propulsion mechanism of Leidenfrost droplets against gravity, that we term Leidenfrost droplet trampolining. Leidenfrost droplets gently deposited on fully rigid surfaces experience self-induced spontaneous oscillations and start to gradually bounce from an initial resting altitude to increasing heights, thereby violating the traditionally accepted Leidenfrost equilibrium. We found that the continuously draining vapor cushion initiates and fuels Leidenfrost trampolining by inducing ripples on the droplet bottom surface, which translate into pressure oscillations and induce self-sustained periodic vertical droplet bouncing over a broad range of experimental conditions.
Publisher
Springer Science and Business Media LLC
Subject
General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry
Reference38 articles.
1. Attinger, D. et al. Surface engineering for phase change heat transfer: a review. MRS Energy Sustain. 1, E4 (2014).
2. Kim, J. Spray cooling heat transfer: the state of the art. Int. J. Heat Fluid Flow 28, 753–767 (2007).
3. Galliker, P. et al. Direct printing of nanostructures by electrostatic autofocussing of ink nanodroplets. Nat. Commun. 3, 890 (2012).
4. Streitberger, H.-J. & Goldschmidt, A. BASF Handbook Basics of Coating Technology (Vincentz Network, 2018). https://doi.org/10.1515/9783748600251
5. Nguyen, N. T. & Wereley, S. Fundamentals and applications of microfluidics. Artech House. http://doi.wiley.com/10.1002/1521-3773%252820010316%252940%253A6%253C9823%253A%253AAID-ANIE9823%253E3.3.CO%253B2-C (2006).
Cited by
112 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献