Imperial College London

Professor Omar K. Matar, FREng

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{Constante-Amores:2020:10.1103/PhysRevFluids.5.084007,
author = {Constante-Amores, CR and Kahouadji, L and Batchvarov, A and Shin, S and Chergui, J and Juric, D and Matar, OK},
doi = {10.1103/PhysRevFluids.5.084007},
journal = {Physical Review Fluids},
pages = {084007 1--084007 24},
title = {Dynamics of retracting surfactant-laden ligaments at intermediate Ohnesorge number},
url = {http://dx.doi.org/10.1103/PhysRevFluids.5.084007},
volume = {5},
year = {2020}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - The dynamics of ligaments retracting under the action of surface tension occurs in a multitude of natural and industrial applications; these include inkjet printing and atomization. We perform direct, fully three-dimensional, two-phase numerical simulations of the retracting process over a range of system parameters that account for surfactant solubility, sorption kinetics, and Marangoni stresses. Our results indicate that the presence of surfactant inhibits the “end-pinching” mechanism and promotes neck reopening through Marangoni-flow; this is induced by the formation of surfactant concentration gradients that drive flow-reversal toward the neck. The vortical structures associated with this flow are also analyzed in detail. We also show that these Marangoni stresses lead to interfacial rigidification, observed through a reduction of the retraction velocity and ligament kinetic energy.
AU - Constante-Amores,CR
AU - Kahouadji,L
AU - Batchvarov,A
AU - Shin,S
AU - Chergui,J
AU - Juric,D
AU - Matar,OK
DO - 10.1103/PhysRevFluids.5.084007
EP - 1
PY - 2020///
SN - 2469-990X
SP - 084007
TI - Dynamics of retracting surfactant-laden ligaments at intermediate Ohnesorge number
T2 - Physical Review Fluids
UR - http://dx.doi.org/10.1103/PhysRevFluids.5.084007
UR - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000562935100003&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR - https://journals.aps.org/prfluids/abstract/10.1103/PhysRevFluids.5.084007
UR - http://hdl.handle.net/10044/1/82844
VL - 5
ER -