Convection-enhanced water evaporation | Zendy

Byung Mook Weon | Zendy; J. H. Je | Zendy; Christophe Poulard | Zendy

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Convection-enhanced water evaporation

Author(s) -

Byung Mook Weon,

J. H. Je,

Christophe Poulard

Publication year - 2011

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.3554333

Subject(s) - evaporation , convection , water vapor , contact angle , materials science , wafer , radius , silicon , mechanics , thermodynamics , meteorology , nanotechnology , composite material , optoelectronics , physics , computer security , computer science

Water vapor is lighter than air; this can enhance water evaporation by triggering vapor convection but there is little evidence. We directly visualize evaporation of nanoliter (2 to 700 nL) water droplets resting on silicon wafer in calm air using a high-resolution dual X-ray imaging method. Temporal evolutions of contact radius and contact angle reveal that evaporation rate linearly changes with surface area, indicating convective (instead of diffusive) evaporation in nanoliter water droplets. This suggests that convection of water vapor would enhance water evaporation at nanoliter scales, for instance, on microdroplets or inside nanochannels

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