scholarly journals Interfacial tension measurement of immiscible liquids using a capillary tube

AIChE Journal ◽  
1992 ◽  
Vol 38 (4) ◽  
pp. 615-618 ◽  
Author(s):  
N. Rashidnia ◽  
R. Balasubramaniam ◽  
D. Del Signore
Keyword(s):  
Interfacial Tension ◽  
Capillary Tube ◽  
Immiscible Liquids

Measurement of interfacial tension of immiscible liquids of equal density

AIChE Journal ◽  
1988 ◽  
Vol 34 (1) ◽  
pp. 155-157 ◽  
Author(s):  
S. B. Reddy Karri ◽  
V. K. Mathur
Keyword(s):  
Interfacial Tension ◽  
Immiscible Liquids ◽  
Equal Density

Capillarity, wetting, and surface (interfacial) tension

Surfactants ◽  
2019 ◽  
pp. 25-52
Author(s):  
Bob Aveyard
Keyword(s):  
Contact Angle ◽  
Interfacial Tension ◽  
Solid Surface ◽  
Vapour Pressure ◽  
Pressure Difference ◽  
Capillary Tube ◽  
Intermolecular Forces ◽  
Liquid Interface ◽  
Interfacial Tensions ◽  
Drop Radius

Capillarity reflects the action of interfacial tension and has been central to understanding intermolecular forces. When a liquid meets a solid surface (with contact angle θ‎) it forms a meniscus which is associated with the rise/depression of liquid in a capillary tube, hence the term capillarity. Interfacial tensions also determine how a liquid wets and adheres to a solid or another liquid. Liquid menisci are curved, and Young, Laplace, and Kelvin have all thrown light upon the properties of curved liquid surfaces. The Young–Laplace equation relates the pressure difference across a curved liquid interface to both the interfacial tension and curvature of the interface. Interfacial tension also gives rise to a dependence of the vapour pressure (and solubility) of a liquid on the curvature of its surface (e.g. drop radius), as expressed in the Kelvin equation. Common methods for measurement of interfacial tensions are described in an Appendix.

Computational Modeling of Adiabatic Bubble Growth Dynamics From Submerged Capillary-Tube Orifices in Aqueous Solutions of Surfactants

2019 ◽  
Vol 141 (5) ◽  
Author(s):  
Sanjivan Manoharan ◽  
Anirudh M. Deodhar ◽  
Raj M. Manglik ◽  
Milind A. Jog
Keyword(s):  
Surface Tension ◽  
Interfacial Tension ◽  
Capillary Tube ◽  
Pure Water ◽  
Growth Dynamics ◽  
Interface Region ◽  
Pure Liquid ◽  
Flow Rates ◽  
Air Interface ◽  
Adsorption Desorption

The growth dynamics of isolated gas bubbles from a submerged capillary-tube orifice in a pool of an aqueous surfactant (sodium dodecyl sulfate or SDS) solution is computationally investigated. The governing equations for surfactant mass transport in the bulk liquid and interfacial adsorption–desorption are solved simultaneously with the Navier–Stokes equations, employing the volume-of-fluid (VOF) technique to track the deforming liquid–air interface. The VOF method tends to spread the liquid–air interface over two to three computational cells, creating an interface region with finite thickness. A new numerical treatment is developed to determine the surfactant transport and adsorption/desorption in the interface region. From the variation of the surfactant interfacial concentration, the spatio-temporal variation in interfacial tension is determined and the shape of the growing bubble is predicted. To validate the numerical model, experimental measurements of bubble shape and size are carried out using high speed videography. Because of the decrease in surface tension with surface age, bubble departure diameters in SDS–water solutions are smaller than those obtained in pure water, and they are a function of bubble frequency. At higher air-flow rates (smaller surface age), the bubble departure diameters tend toward those in pure water, whereas at low flow rates (larger surface age), they are significantly smaller than those in water and are closer in size to those in a pure liquid having surface tension equal to the equilibrium value in SDS solution. Furthermore, the nonuniform surfactant adsorption–desorption at the evolving interface results in variation in interfacial tension around the bubbles, and thus their shapes in surfactant solution are different from those in a pure liquid.

An acoustic method of measuring interfacial tension on the interface between immiscible liquids

2009 ◽  
Vol 47 (2) ◽  
pp. 187-194 ◽  
Author(s):  
V. V. Filippov ◽  
D. A. Yagodin ◽  
P. S. Popel’
Keyword(s):  
Interfacial Tension ◽  
Acoustic Method ◽  
Immiscible Liquids

The determination of the interfacial tension between two liquids

1971 ◽  
Vol 50 (3) ◽  
pp. 469-480 ◽  
Author(s):  
Jerome H. Milgram ◽  
Robert G. Bradley
Keyword(s):  
Interfacial Tension ◽  
Capillary Tube ◽  
Force Measurement ◽  
Capillary Waves ◽  
New Method ◽  
Interfacial Tensions ◽  
Method Of Measurement

The problems commonly encountered in the measurement of the interfacial tension between two liquids by capillary tube or force measurement are described. In order to avoid such problems, a new method of measurement of the interfacial tension is developed here which is based on the details of axisymmetric capillary waves which can be generated on the interface. Analyses relating these details to the interfacial tension and showing how the details can be measured photographically are given. An apparatus for making these photographic measurements is described and photographs made with such an apparatus are presented. An analysis of these photographs is given which gives the interfacial tensions for the interfaces shown.

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