How ambient conditions affect the Leidenfrost temperature

Limbeek, Michiel A. J. van; Ramìrez-Soto, Olinka; Prosperetti, Andréa; Lohse, Detlef

doi:10.1039/d0sm01570a

Cited by 21 publications

(7 citation statements)

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“…1(a)]. Further experiments [17][18][19][20] confirmed the metastability of the levitated state and showed that the lower threshold of the Leidenfrost temperature T − L is controlled by hydrodynamic instabilities of the gas layer, or by surface contamination and/or roughness. On the contrary, measuring T þ L is still challenging because of the hysteresis introduced by the hydrodynamic stability of the vapor layer and only recently attempts have been made to derive T þ L from a stability analysis at the nanoscale [21].…”

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confidence: 83%

Leidenfrost Effect as a Directed Percolation Phase Transition

Chantelot

Lohse

2021

Phys. Rev. Lett.

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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 nonequilibrium 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 spatiotemporally 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.

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confidence: 83%

Leidenfrost Effect as a Directed Percolation Phase Transition

Chantelot

Lohse

2021

Phys. Rev. Lett.

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“…Pressure dependence. Interestingly, the Leidenfrost temperature depends on p 0 for the quasi-static case, but this can be attributed to the thermodynamics (van Limbeek et al 2021). The dynamic Leidenfrost temperature also depends on ambient pressure (van Limbeek et al 2018), and the picture there is less clear and deserves further attention, with lower pressures leading to an unexplained increased dependence of T L on impact speed.…”

Section: Phenomenology Of the Film And Modes Of Touchdownmentioning

confidence: 97%

Gas Microfilms in Droplet Dynamics: When Do Drops Bounce?

Sprittles

2024

Annu. Rev. Fluid Mech.

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In the last ten years, advances in experimental techniques have enabled remarkable discoveries of how the dynamics of thin gas films can profoundly influence the behavior of liquid droplets. Drops impacting onto solids can skate on a film of air so that they bounce off solids. For drop–drop collisions, this effect, which prevents coalescence, has been long recognized. Notably, the precise physical mechanisms governing these phenomena have been a topic of intense debate, leading to a synergistic interplay of experimental, theoretical, and computational approaches. This review attempts to synthesize our knowledge of when and how drops bounce, with a focus on ( a) the unconventional microscale and nanoscale physics required to predict transitions to/from merging and ( b) the development of computational models. This naturally leads to the exploration of an array of other topics, such as the Leidenfrost effect and dynamic wetting, in which gas films also play a prominent role. Expected final online publication date for the Annual Review of Fluid Mechanics, Volume 56 is January 2024. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

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“…The condition ṽg i = Ti corresponds to the fact that k changes its sign. The value of T w associated with bifurcation (26) is our definition of the Leidenfrost temperature which will be denoted by T L . From the Table III For the second linear approximation (37) the corresponding Table IV is formed.…”

Section: B Values Of Latent Heat Of Vaporization For Watermentioning

confidence: 99%

“…These events have given rise to a large number of studies [1][2][3][4][5][6][19][20][21][22][23][24]. In particular, the Leidenfrost temperature depends on physico-chemical and mechanical properties of the heated surface, the liquid type and the ambient conditions [25,26]. However, it cannot be said that a theory for a satisfactory prediction of the Leidenfrost temperature has been given.…”

Section: Introductionmentioning

confidence: 99%

Theoretical model of the Leidenfrost temperature

Gavrilyuk

Gouin

2022

Phys. Rev. E

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The Leidenfrost effect is a phenomenon in which a liquid, poured onto a surface significantly hotter than the liquid's boiling point, produces a layer of vapor that prevents the liquid from rapid evaporation. Rather than making physical contact, a drop of water levitates above the surface.The temperature above which the phenomenon occurs is called Leidenfrost's temperature. The reason for the existence of Leidenfrost's temperature, which is much higher than the boiling point of the liquid, is not fully understood and predicted. Here we prove that Leidenfrost's temperature corresponds to a bifurcation in the solutions of equations describing evaporation of a non-equilibrium liquid-vapor interface. For water, the theoretical values of obtained Leidenfrost's temperature, and that of the liquid bulk which is smaller than the boiling point of liquid, fit the experimental results found in the literature.

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How ambient conditions affect the Leidenfrost temperature

Abstract: By sufficiently heating a solid, a sessile drop can be prevented from contacting the surface by floating on its own vapour. While certain aspects of the dynamics of this so-called...

Cited by 21 publications

References 44 publications

Leidenfrost Effect as a Directed Percolation Phase Transition

Leidenfrost Effect as a Directed Percolation Phase Transition

Gas Microfilms in Droplet Dynamics: When Do Drops Bounce?

Theoretical model of the Leidenfrost temperature

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