Mechanism of supercooled droplet freezing on surfaces

被引：636

作者：

Jung, Stefan ^{[1
,2
]}

Tiwari, Manish K. ^{[1
]}

Doan, N. Vuong ^{[2
]}

Poulikakos, Dimos ^{[1
]}

机构：

[1] ETH, Mech & Proc Engn Dept, Lab Thermodynam Emerging Technol, CH-8092 Zurich, Switzerland

[2] EADS Innovat Works, Dept IW MS, D-81663 Munich, Germany

来源：

NATURE COMMUNICATIONS | 2012年 / 3卷

关键词：

SUPERHYDROPHOBIC SURFACES; ICE ADHESION; NUCLEATION; WATER;

D O I：

10.1038/ncomms1630

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Understanding ice formation from supercooled water on surfaces is a problem of fundamental importance and general utility. Superhydrophobic surfaces promise to have remarkable 'icephobicity' and low ice adhesion. Here we show that their icephobicity can be rendered ineffective by simple changes in environmental conditions. Through experiments, nucleation theory and heat transfer physics, we establish that humidity and/or the flow of a surrounding gas can fundamentally switch the ice crystallization mechanism, drastically affecting surface icephobicity. Evaporative cooling of the supercooled liquid can engender ice crystallization by homogeneous nucleation at the droplet-free surface as opposed to the expected heterogeneous nucleation at the substrate. The related interplay between droplet roll-off and rapid crystallization is also studied. Overall, we bring a novel perspective to icing and icephobicity, unveiling the strong influence of environmental conditions in addition to the accepted effects of the surface conditions and hydrophobicity.

引用

页数：8

共 28 条

[21]

Pruppacher HR, 1998, MICROPHYSICS CLOUDS

[22] Water - Ins and outs of ice nucleation [J].

Sastry, S .

NATURE, 2005, 438 (7069) :746-747

[23]

Schlichting H., 2016, BOUNDARY LAYER THEOR, DOI [10.1007/978-3-662-52919-5, DOI 10.1007/978-3-642-85829-1]

[24] Marangoni convection in droplets on superhydrophobic surfaces [J].

Tam, Daniel ;

von Arnim, Volkmar ;

McKinley, G. H. ;

Hosoi, A. E. .

JOURNAL OF FLUID MECHANICS, 2009, 624 :101-123

[25] NUCLEATION CATALYSIS [J].

TURNBULL, D ;

VONNEGUT, B .

INDUSTRIAL AND ENGINEERING CHEMISTRY, 1952, 44 (06) :1292-1298

[26] Dripping to jetting transitions in coflowing liquid streams [J].

Utada, Andrew S. ;

Fernandez-Nieves, Alberto ;

Stone, Howard A. ;

Weitz, David A. .

PHYSICAL REVIEW LETTERS, 2007, 99 (09)

[27] Frost formation and ice adhesion on superhydrophobic surfaces [J].

Varanasi, Kripa K. ;

Deng, Tao ;

Smith, J. David ;

Hsu, Ming ;

Bhate, Nitin .

APPLIED PHYSICS LETTERS, 2010, 97 (23)

[28] Effect of solutes on the heterogeneous nucleation temperature of supercooled water: an experimental determination [J].

Wilson, P. W. ;

Haymet, A. D. J. .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2009, 11 (15) :2679-2682

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