Effect of viscous force on dynamic contact angle measurement using Wilhelmy plate method

Alireza Mohammad Karim; H. Pirouz Kavehpour

doi:10.1016/j.colsurfa.2018.03.058

Effect of viscous force on dynamic contact angle measurement using Wilhelmy plate method

Alireza Mohammad Karim, H. Pirouz Kavehpour

Chemical Engineering and Materials Science

Research output: Contribution to journal › Article › peer-review

48 Scopus citations

Abstract

Wilhelmy plate method does not consider viscous force in the force balance equation to measure the dynamic contact angle and this results in a significant error in the measurement. Differences between the results obtained by optical method and Wilhelmy plate method indicate the importance of viscous force in the force balance equation. A theoretical viscous model is proposed, which must be considered in the force balance equation in Wilhelmy plate method to increase the accuracy of the dynamic contact angle measurement, especially for the case of highly viscous liquids and for experiments at large speeds of the plate, which can lead to large shear rate along the surface of the plate.

Original language	English (US)
Pages (from-to)	54-60
Number of pages	7
Journal	Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume	548
DOIs	https://doi.org/10.1016/j.colsurfa.2018.03.058
State	Published - Jul 5 2018

Bibliographical note

Publisher Copyright:
© 2018 Elsevier B.V.

Keywords

Capillary number
Dynamic contact angle
Shear rate
Slip length
Viscous force
Wilhelmy plate method

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10.1016/j.colsurfa.2018.03.058

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title = "Effect of viscous force on dynamic contact angle measurement using Wilhelmy plate method",

abstract = "Wilhelmy plate method does not consider viscous force in the force balance equation to measure the dynamic contact angle and this results in a significant error in the measurement. Differences between the results obtained by optical method and Wilhelmy plate method indicate the importance of viscous force in the force balance equation. A theoretical viscous model is proposed, which must be considered in the force balance equation in Wilhelmy plate method to increase the accuracy of the dynamic contact angle measurement, especially for the case of highly viscous liquids and for experiments at large speeds of the plate, which can lead to large shear rate along the surface of the plate.",

keywords = "Capillary number, Dynamic contact angle, Shear rate, Slip length, Viscous force, Wilhelmy plate method",

author = "{Mohammad Karim}, Alireza and Kavehpour, {H. Pirouz}",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2018",

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doi = "10.1016/j.colsurfa.2018.03.058",

language = "English (US)",

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TY - JOUR

T1 - Effect of viscous force on dynamic contact angle measurement using Wilhelmy plate method

AU - Mohammad Karim, Alireza

AU - Kavehpour, H. Pirouz

PY - 2018/7/5

Y1 - 2018/7/5

N2 - Wilhelmy plate method does not consider viscous force in the force balance equation to measure the dynamic contact angle and this results in a significant error in the measurement. Differences between the results obtained by optical method and Wilhelmy plate method indicate the importance of viscous force in the force balance equation. A theoretical viscous model is proposed, which must be considered in the force balance equation in Wilhelmy plate method to increase the accuracy of the dynamic contact angle measurement, especially for the case of highly viscous liquids and for experiments at large speeds of the plate, which can lead to large shear rate along the surface of the plate.

AB - Wilhelmy plate method does not consider viscous force in the force balance equation to measure the dynamic contact angle and this results in a significant error in the measurement. Differences between the results obtained by optical method and Wilhelmy plate method indicate the importance of viscous force in the force balance equation. A theoretical viscous model is proposed, which must be considered in the force balance equation in Wilhelmy plate method to increase the accuracy of the dynamic contact angle measurement, especially for the case of highly viscous liquids and for experiments at large speeds of the plate, which can lead to large shear rate along the surface of the plate.

KW - Capillary number

KW - Dynamic contact angle

KW - Shear rate

KW - Slip length

KW - Viscous force

KW - Wilhelmy plate method

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DO - 10.1016/j.colsurfa.2018.03.058

M3 - Article

AN - SCOPUS:85044571104

SN - 0927-7757

VL - 548

SP - 54

EP - 60

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

ER -

Effect of viscous force on dynamic contact angle measurement using Wilhelmy plate method

Abstract

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