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Measurements of interfacial film thickness for immiscible liquid-liquid slug/droplet flows

Authors Qiu, HH View this author's profile
Wang, XS
Hong, FJ
Issue Date 2005
Source Measurement science & technology , v. 16, (6), 2005, JUN, p. 1374-1380
Summary A novel method for measuring the interfacial liquid film thickness between immiscible liquids of a slug/droplet in a micropipe is proposed. This method is capable of measuring an oil slug/droplet in water with the relative refractive index (m) between the immiscible liquids very close to one in a capillary tube. Unlike the measurement configuration for an air slug in water, an optical oriental for optimizing the refracted fringes pattern by the liquid-liquid interface is introduced. Measurements of film thicknesses of a kerosene oil droplet/slug in a water wetted capillary tube (m > 1) and a water droplet/slug in a kerosene oil wetted capillary tube (m < 1) were demonstrated. This diagnostic method is easy to implement and it will have great potential for immiscible liquid flow research in microfluidic channels.
ISSN 0957-0233
Rights Measurement Science and Technology © copyright (2005) IOP Publishing Ltd. The Journal's web site is located at
Language English
Format Article
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