Title

MEASUREMENT OF SURFACE INTERFACIAL TENSION AS A FUNCTION OF TEMPERATURE USING PENDANT DROP IMAGES

Authors

Authors

E. Yakhshi-Tafti; R. Kumar;H. J. Cho

Comments

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Abbreviated Journal Title

Int. J. Optomechatronics

Keywords

droplet microfluidics; interfacial tension; pefluorocarbon oil; pendant; drop method; thermocapillary; MARANGONI NUMBER; REDUCED GRAVITY; MIGRATION; BUBBLES; Engineering, Electrical & Electronic; Engineering, Mechanical; Optics

Abstract

Accurate and reliable measurements of surface tension at the interface of immiscible phases are crucial to understanding various physico-chemical reactions taking place between those. Based on the pendant drop method, an optical (graphical)-numerical procedure was developed to determine surface tension and its dependency on the surrounding temperature. For modeling and experimental verification, chemically inert and thermally stable perfluorocarbon (PFC) oil and water was used. Starting with geometrical force balance, governing equations were derived to provide non-dimensional parameters which were later used to extract values for surface tension. Comparative study verified the accuracy and reliability of the proposed method.

Journal Title

International Journal of Optomechatronics

Volume

5

Issue/Number

4

Publication Date

1-1-2011

Document Type

Article

Language

English

First Page

393

Last Page

403

WOS Identifier

WOS:000299955700006

ISSN

1559-9612

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