Imperial College London
Portrait Picture

Professor Omar K. Matar, FREng

Faculty of Engineering, Department of Chemical Engineering

Head of Department of Chemical Engineering
 
 
 
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Contact

 

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

 
 
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Assistant

 

Mr Avery Kitchens +44 (0)20 7594 6263

 
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Location

 

305 ACEACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Nazareth:2020:10.1103/physrevfluids.5.104007,
author = {Nazareth, RK and Karapetsas, G and Sefiane, K and Matar, OK and Valluri, P},
doi = {10.1103/physrevfluids.5.104007},
journal = {Physical Review Fluids},
pages = {104007  1--104007  32},
title = {Stability of slowly evaporating thin liquid films of binary mixtures},
url = {http://dx.doi.org/10.1103/physrevfluids.5.104007},
volume = {5},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We consider the evaporation of a thin liquid layer which consists of a binary mixture of volatile liquids. The mixture is on top of a heated substrate and in contact with the gas phase that consists of the same vapor as the binary mixture. The effects of thermocapillarity, solutocapillarity, and the van der Waals interactions are considered. We derive the long-wave evolution equations for the free interface and the volume fraction that govern the two-dimensional stability of the layer subject to the above coupled mechanisms and perform a linear stability analysis. Our results demonstrate two modes of instabilities, a monotonic instability mode and an oscillatory instability mode. We supplement our results from stability analysis with transient simulations to examine the dynamics in the nonlinear regime and analyze how these instabilities evolve with time. More precisely we discuss how the effect of relative volatility along with the competition between thermal and solutal Marangoni effect define the mode of instability that develops during the evaporation of the liquid layer due to preferential evaporation of one of the components.
AU  - Nazareth,RK
AU  - Karapetsas,G
AU  - Sefiane,K
AU  - Matar,OK
AU  - Valluri,P
DO  - 10.1103/physrevfluids.5.104007
EP  - 1
PY  - 2020///
SN  - 2469-990X
SP  - 104007
TI  - Stability of slowly evaporating thin liquid films of binary mixtures
T2  - Physical Review Fluids
UR  - http://dx.doi.org/10.1103/physrevfluids.5.104007
UR  - https://journals.aps.org/prfluids/abstract/10.1103/PhysRevFluids.5.104007
UR  - http://hdl.handle.net/10044/1/84143
VL  - 5
ER  -
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