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

    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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