scholarly journals The Electrocapillary Curves of the Phosphatidylcholine Monolayer at the Polarized Oil–Water Interface. I. Measurement of Interfacial Tension Using a Computer-Aided Pendant-Drop Method

1988 ◽  
Vol 61 (6) ◽  
pp. 1845-1851 ◽  
Author(s):  
Takashi Kakiuchi ◽  
Masatoshi Nakanishi ◽  
Mitsugi Senda
Keyword(s):  
Interfacial Tension ◽  
Water Interface ◽  
Pendant Drop ◽  
Drop Method ◽  
Computer Aided ◽  
Oil Water ◽  
Pendant Drop Method

Study on Liquid-Bridging Induced Microscale Contact of Two Liquid Droplets

2011 ◽  
Author(s):  
Yuichi Shibata ◽  
Takehiko Yanai ◽  
Osamu Okamoto ◽  
Masahiro Kawaji
Keyword(s):  
Interfacial Tension ◽  
High Speed ◽  
Liquid Droplet ◽  
Dominant Factor ◽  
Contact Method ◽  
Liquid Droplets ◽  
Pendant Drop ◽  
Drop Method ◽  
Surface And Interface ◽  
Pendant Drop Method

The field of microfluidics is developing with advances in MEMS, biotechnology and μ-TAS technologies. In various devices, interfacial energy is a dominant factor for liquid movement in a microchannel. The surface tension and interfacial tension values are necessary to analyze the liquid behavior in the microchannel. Evaluating the values of interfacial tension is especially important for multiphase flow. A pendant drop method is usually used to measure the interfacial tension, however, this method has some inconveniences. For example, the pendant drop method demands strict accuracy for measuring the droplet size when the droplet has a non-spherical shape. Moreover, it needs an accurate value of the density difference between the two liquids. In this work, a new measurement method named “Liquid-bridging Induced Micro Contact Method” has been developed to overcome the weaknesses of the existing methods. In a previous study, we obtained the interfacial tension from bridging of two liquid droplets on the tip of opposing round metal rods. In this study, we have examined the liquid-bridging of two extruded liquid droplets out of a micro glass tube. By measuring the radii of curvature of each liquid surface and interface, we calculate the Laplace pressure on the surface and interface, and derive the interfacial tension value using the Laplace equation. To prove these two methods are reliable, we have compared the results obtained in this experiment to that of the pendant drop method. As a liquid droplet comes into contact with an opposite liquid droplet the phenomenon is recorded using a CCD camera and high speed camera. The results show that the values of interfacial tension obtained from two methods are approximately the same. Therefore, the liquid-bridging induced micro contact method has been shown to be capable of interfacial tension measurements.

scholarly journals Effect of Contact Time and Gas Component on Interfacial Tension of CO2/Crude Oil System by Pendant Drop Method

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Xin Wang ◽  
Lifeng Liu ◽  
Zengmin Lun ◽  
Chengyuan Lv ◽  
Rui Wang ◽  
...  
Keyword(s):  
Interfacial Tension ◽  
Crude Oil ◽  
Dynamic Balance ◽  
Formation Condition ◽  
Initial Contact ◽  
Fluid Composition ◽  
Pendant Drop ◽  
Dynamic Interfacial Tension ◽  
Drop Method ◽  
Pendant Drop Method

Pendant drop method has been used to measure the equilibrium interfacial tension and dynamic interfacial tension of CO2/crude oil system under the simulated-formation condition, in which the temperature is 355.65 K and pressure ranges from 0 MPa to 30 MPa. The test results indicated that the equilibrium interfacial tension of CO2/crude oil systems decreased with the increase of the systematic pressure. The dynamic interfacial tension of CO2/original oil, CO2/remaining oil, and CO2/produced oil systems is large at the initial contact and decreases gradually after that, and then finally it reaches dynamic balance. In addition, the higher the pressure is, the larger the magnitude of changing of CO2/crude oil interfacial tension with time will reduce. Moreover, by PVT phase experiment, gas-oil ratio, gas composition, and well fluid composition have been got, and different contents of light components in three oil samples under reservoir conditions have also been calculated. The relationship between equilibrium interfacial tensions and pressures of three different components of crude oil and CO2system was studied, and the higher C1is, the lower C2–C10will be, and the equilibrium interfacial tension will get higher. Therefore, the effect of light weight fractions on interfacial tension under formation conditions was studied.

A Pendant Drop Method for Measuring Liquid Interfacial Tension Using CAM Instruments

2012 ◽  
Vol 6 (1) ◽  
pp. 299-302
Author(s):  
Jun Lu ◽  
Hongtao Zhang ◽  
Deyun Wei ◽  
Yuxia Hu
Keyword(s):  
Interfacial Tension ◽  
Pendant Drop ◽  
Drop Method ◽  
Pendant Drop Method
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