Imperial College London
Alternate

ProfessorRichardCraster

Faculty of Natural Sciences

Dean of the Faculty of Natural Sciences
 
 
 
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Contact

 

+44 (0)20 7594 8554r.craster Website

 
 
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Assistant

 

Miss Hannah Cline +44 (0)20 7594 1934

 
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Location

 

3.05Faculty BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Batchvarov:2021:10.1017/jfm.2020.796,
author = {Batchvarov, A and Kahouadji, L and Constante-Amores, CR and Norões, Gonçalves GF and Shin, S and Chergui, J and Juric, D and Craster, RV and Matar, OK},
doi = {10.1017/jfm.2020.796},
journal = {Journal of Fluid Mechanics},
pages = {A16--1--A16--13},
title = {Three-dimensional dynamics of falling films in the presence of insoluble surfactants},
url = {http://dx.doi.org/10.1017/jfm.2020.796},
volume = {906},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We study the effect of insoluble surfactants on the wave dynamics of vertically falling liquid films. We use three-dimensional numerical simulations and employ a hybrid interface-tracking/level-set method, taking into account Marangoni stresses induced by gradients of interfacial surfactant concentration. Our numerical predictions for the evolution of the surfactant-free, three-dimensional wave topology are validated against the experimental work of Park & Nosoko (AIChE J., vol. 49, 2003, pp. 2715–2727). The addition of surfactants is found to influence significantly the development of horseshoe-shaped waves. At low Marangoni numbers, we show that the wave fronts exhibit spanwise oscillations before eventually acquiring a quasi-two-dimensional shape. In addition, the presence of Marangoni stresses is found to suppress the peaks of the travelling waves and preceding capillary wave structures. At high Marangoni numbers, a near-complete rigidification of the interface is observed.
AU  - Batchvarov,A
AU  - Kahouadji,L
AU  - Constante-Amores,CR
AU  - Norões,Gonçalves GF
AU  - Shin,S
AU  - Chergui,J
AU  - Juric,D
AU  - Craster,RV
AU  - Matar,OK
DO  - 10.1017/jfm.2020.796
EP  - 1
PY  - 2021///
SN  - 0022-1120
SP  - 16
TI  - Three-dimensional dynamics of falling films in the presence of insoluble surfactants
T2  - Journal of Fluid Mechanics
UR  - http://dx.doi.org/10.1017/jfm.2020.796
UR  - https://www.cambridge.org/core/journals/journal-of-fluid-mechanics/article/threedimensional-dynamics-of-falling-films-in-the-presence-of-insoluble-surfactants/C9896FA174E28ECAE1A8E0C1A2160C48
UR  - http://hdl.handle.net/10044/1/84599
VL  - 906
ER  -
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