The Leidenfrost effect as a directed percolation phase transition
| Autor: | Detlef Lohse, Pierre Chantelot |
|---|---|
| Přispěvatelé: | Physics of Fluids, MESA+ Institute |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Range (particle radiation)
Phase transition Materials science Fluid Dynamics (physics.flu-dyn) FOS: Physical sciences General Physics and Astronomy Non-equilibrium thermodynamics Physics - Fluid Dynamics 01 natural sciences Leidenfrost effect Directed percolation 010305 fluids & plasmas law.invention Superheating Physics::Fluid Dynamics 13. Climate action law Chemical physics Intermittency 0103 physical sciences Levitation 010306 general physics |
| Zdroj: | Physical review letters, 127(12):124502. American Physical Society |
| ISSN: | 0031-9007 |
| Popis: | Volatile drops deposited on a hot solid can levitate on a cushion of their own vapor, without contacting the surface. We propose to understand the onset of this so-called Leidenfrost effect through an analogy to non-equilibrium systems exhibiting a directed percolation phase transition. When performing impacts on superheated solids, we observe a regime of spatiotemporal intermittency in which localized wet patches coexist with dry regions on the substrate. We report a critical surface temperature, which marks the upper bound of a large range of temperatures in which levitation and contact coexist. In this range, with decreasing temperature, the equilibrium wet fraction increases continuously from zero to one. Also, the statistical properties of the spatio-temporally intermittent regime are in agreement with that of the directed percolation universality class. This analogy allows us to redefine the Leidenfrost temperature and shed light on the physical mechanisms governing the transition to the Leidenfrost state. |
| Databáze: | OpenAIRE |
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