Effect of moderate DC electric field on formation of surfactant-laden drops

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@article{a22ed1f8cc384c538f7d96b9140c6457,
title = "Effect of moderate DC electric field on formation of surfactant-laden drops",
abstract = "The continuous formation of mm-scale surfactant-laden aqueous drops in oil was studied under an applied DC electric field of 0–267 kV/m. The parameters varied included the flow rate of dispersed phase, the electric field strength, the viscosities and densities of dispersed and continuous phase and the surfactant type (anionic or cationic) and concentration. An increase in the electric field strength resulted in a decrease of the drop size due to increasing stresses on the drop interface. The size reduction continued until transition to the irregular regime. The values of critical electric field strength for this transition increased with an increase in both the flow rate and the viscosity ratio between the dispersed and continuous phase. The critical electric field strength and the size of the drops formed in the periodic dripping regime were independent of the electric field polarity. The effect of the electric field increased with a decrease of interfacial tension and density difference between the dispersed and continuous phase.",
keywords = "Electric field, Emulsion, Polarity, Surfactant",
author = "Federico Alberini and Mark Simmons and Nina Kovalchuk",
year = "2020",
month = may,
doi = "10.1016/j.cherd.2020.03.009",
language = "English",
volume = "157",
pages = "133--141",
journal = "Chemical Engineering Research and Design",
issn = "0263-8762",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Effect of moderate DC electric field on formation of surfactant-laden drops

AU - Alberini, Federico

AU - Simmons, Mark

AU - Kovalchuk, Nina

PY - 2020/5

Y1 - 2020/5

N2 - The continuous formation of mm-scale surfactant-laden aqueous drops in oil was studied under an applied DC electric field of 0–267 kV/m. The parameters varied included the flow rate of dispersed phase, the electric field strength, the viscosities and densities of dispersed and continuous phase and the surfactant type (anionic or cationic) and concentration. An increase in the electric field strength resulted in a decrease of the drop size due to increasing stresses on the drop interface. The size reduction continued until transition to the irregular regime. The values of critical electric field strength for this transition increased with an increase in both the flow rate and the viscosity ratio between the dispersed and continuous phase. The critical electric field strength and the size of the drops formed in the periodic dripping regime were independent of the electric field polarity. The effect of the electric field increased with a decrease of interfacial tension and density difference between the dispersed and continuous phase.

AB - The continuous formation of mm-scale surfactant-laden aqueous drops in oil was studied under an applied DC electric field of 0–267 kV/m. The parameters varied included the flow rate of dispersed phase, the electric field strength, the viscosities and densities of dispersed and continuous phase and the surfactant type (anionic or cationic) and concentration. An increase in the electric field strength resulted in a decrease of the drop size due to increasing stresses on the drop interface. The size reduction continued until transition to the irregular regime. The values of critical electric field strength for this transition increased with an increase in both the flow rate and the viscosity ratio between the dispersed and continuous phase. The critical electric field strength and the size of the drops formed in the periodic dripping regime were independent of the electric field polarity. The effect of the electric field increased with a decrease of interfacial tension and density difference between the dispersed and continuous phase.

KW - Electric field

KW - Emulsion

KW - Polarity

KW - Surfactant

UR - http://www.scopus.com/inward/record.url?scp=85082113419&partnerID=8YFLogxK

U2 - 10.1016/j.cherd.2020.03.009

DO - 10.1016/j.cherd.2020.03.009

M3 - Article

VL - 157

SP - 133

EP - 141

JO - Chemical Engineering Research and Design

JF - Chemical Engineering Research and Design

SN - 0263-8762

ER -