Imperial College London

Professor Omar K. Matar

Faculty of EngineeringDepartment of Chemical Engineering

Vice-Dean (Education), Faculty of Engineering
 
 
 
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Contact

 

+44 (0)20 7594 9618o.matar Website

 
 
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Assistant

 

Miss Nazma Mojid +44 (0)20 7594 3918

 
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Location

 

506ACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Saenz:2017:10.1038/ncomms14783,
author = {Saenz, PJ and Wray, AW and Che, Z and Matar, OK and Valluri, P and Kim, J and Sefiane, K},
doi = {10.1038/ncomms14783},
journal = {NATURE COMMUNICATIONS},
title = {Dynamics and universal scaling law in geometrically-controlled sessile drop evaporation},
url = {http://dx.doi.org/10.1038/ncomms14783},
volume = {8},
year = {2017}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - The evaporation of a liquid drop on a solid substrate is a remarkably common phenomenon. Yet, the complexity of the underlying mechanisms has constrained previous studies to spherically symmetric configurations. Here we investigate well-defined, non-spherical evaporating drops of pure liquids and binary mixtures. We deduce a universal scaling law for the evaporation rate valid for any shape and demonstrate that more curved regions lead to preferential localized depositions in particle-laden drops. Furthermore, geometry induces well-defined flow structures within the drop that change according to the driving mechanism. In the case of binary mixtures, geometry dictates the spatial segregation of the more volatile component as it is depleted. Our results suggest that the drop geometry can be exploited to prescribe the particle deposition and evaporative dynamics of pure drops and the mixing characteristics of multicomponent drops, which may be of interest to a wide range of industrial and scientific applications.
AU - Saenz,PJ
AU - Wray,AW
AU - Che,Z
AU - Matar,OK
AU - Valluri,P
AU - Kim,J
AU - Sefiane,K
DO - 10.1038/ncomms14783
PY - 2017///
SN - 2041-1723
TI - Dynamics and universal scaling law in geometrically-controlled sessile drop evaporation
T2 - NATURE COMMUNICATIONS
UR - http://dx.doi.org/10.1038/ncomms14783
UR - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000396317400001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR - http://hdl.handle.net/10044/1/45993
VL - 8
ER -