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Evaporation of water: evaporation rate and collective effects

Published online by Cambridge University Press:  09 June 2016

Odile Carrier ,
Noushine Shahidzadeh-Bonn ,
Rojman Zargar ,
Mounir Aytouna ,
Mehdi Habibi ,
Jens Eggers  and
Daniel Bonn
Odile Carrier
Affiliation:
Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098XH Amsterdam, The Netherlands
Noushine Shahidzadeh-Bonn
Affiliation:
Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098XH Amsterdam, The Netherlands
Rojman Zargar
Affiliation:
Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098XH Amsterdam, The Netherlands
Mounir Aytouna
Affiliation:
Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098XH Amsterdam, The Netherlands
Mehdi Habibi
Affiliation:
Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098XH Amsterdam, The Netherlands Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran
Jens Eggers
Affiliation:
Department of Mathematics, University of Bristol, University Walk, Bristol BS8 1TW, UK
Daniel Bonn*
Affiliation:
Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098XH Amsterdam, The Netherlands
*
†Email address for correspondence: D.Bonn@uva.nl
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Abstract

We study the evaporation rate from single drops as well as collections of drops on a solid substrate, both experimentally and theoretically. For a single isolated drop of water, in general the evaporative flux is limited by diffusion of water through the air, leading to an evaporation rate that is proportional to the linear dimension of the drop. Here, we test the limitations of this scaling law for several small drops and for very large drops. We find that both for simple arrangements of drops, as well as for complex drop size distributions found in sprays, cooperative effects between drops are significant. For large drops, we find that the onset of convection introduces a length scale of approximately 20 mm in radius, below which linear scaling is found. Above this length scale, the evaporation rate is proportional to the surface area.

JFM classification

Phase change: Condensation/evaporation Drops and Bubbles: Drops Phase change: Phase change
Type
Papers
Information
Journal of Fluid Mechanics , Volume 798 , 10 July 2016 , pp. 774 - 786
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Copyright
© 2016 Cambridge University Press 

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