Measurement of ultralow interfacial tension with ADSA using an entropic edge-detector
نویسندگان
چکیده
The ultralow interfacial tension of the two-liquid phase of a ternary system 1-propanol–n-heptane–water was determined with a pendant drop method using the axisymmetric drop shape analysis (ADSA) methodology. Because the two liquid phases of the ternary system are practically miscible at temperatures near the critical solution temperature, the drops are small and difficult to distinguish from their surroundings. Consequently, some difficulties appear in the automatic drop analysis, mainly in the profile detection step. An entropic edge-detection method based on the Jensen–Shannon divergence is applied for this purpose. To complete the study, the temperature dependence of the interfacial tension of the two-liquid phase of the ternary system was investigated. © 1999 Elsevier Science B.V. All rights reserved.
منابع مشابه
Automatic measurement of surface tension from noisy images using a component labeling method
Automatic surface tension measurement of turbid liquids using a bubble method (e.g., pendant/captive bubble) or interfacial tension measurement f some liquid–liquid systems necessitates an image analysis scheme robust against noise. Measuring the surface tension of lung surfactant–polymer ystems using the combination of axisymmetric drop shape analysis (ADSA) and a captive bubble is such an exa...
متن کاملAxisymmetric Drop Shape Analysis: Computational Methods for the Measurement of Interfacial Properties from the Shape and Dimensions of Pendant and Sessile Drops.
State-of-the-art axisymmetric drop shape analysis (ADSA) techniques for the computation of interfacial tensions and contact angles by fitting the Laplace equation of capillarity to the shape and dimensions of pendant and sessile drops are presented. More accurate, efficient, and reliable versions of the technique for the measurement of contact angles from the volume and diameter of sessile drop...
متن کاملAn Investigation of Oil Spreading Coefficient in Carbonated Water+ Gas + Oil System: an Experimental Study in an Iranian Asphaltenic Oil Reservoir
To provide supplementary oil recovery after the primary and secondary processes, enhanced oil recovery (EOR) techniques are introduced. Carbonated water injection (CWI) as an EOR method can improve sweep efficiency and the risk of gas leakage. On the other hand, the interfacial tension (IFT) is one of the key factors which can affect fluid displacement during the process of CWI greatly. Therefo...
متن کاملMechanical Characterization of Ultralow Interfacial Tension Oil-in-Water Droplets by Thermal Capillary Wave Analysis in a Microfluidic Device.
Measurements of the ultralow interfacial tension and surfactant film bending rigidity for micron-sized heptane droplets in bis(2-ethylhexyl) sodium sulfosuccinate-NaCl aqueous solutions were performed in a microfluidic device through the analysis of thermally driven droplet interface fluctuations. The Fourier spectrum of the stochastic droplet interface displacement was measured through bright-...
متن کاملMechanical characterization of ultralow interfacial tension oil-in-water droplets by thermal capillary wave analysis in a micro uidic device
Measurements of the ultralow interfacial tension and surfactant film bending rigidity for micron-sized heptane droplets in bis(2-ethylhexyl) sodium sulfosuccinate−NaCl aqueous solutions were performed in a microfluidic device through the analysis of thermally driven droplet interface fluctuations. The Fourier spectrum of the stochastic droplet interface displacement was measured through bright-...
متن کامل