Boundary tension by pendant drops
WebDec 12, 2024 · Andreas J, Hauser E, Tucker W. Boundary tension by pendant drops 1. The Journal of Physical Chemistry. 1938; 42:1001-1019; 53. Stauffer CE. The measurement of surface tension by the pendant … WebBoundary tension tends to make a liquid drop hanging (pendant) from the tip of a capillary tube take the form of a sphere. In a gravitational field, the sphere is distorted into an elongated "tear drop" shape. This distortion increases with effective drop density and …
Boundary tension by pendant drops
Did you know?
WebThe calculations presented are an extension of the work of Bashforth & Adams (1883) to give the shapes of pendant drops of liquids for values of β from — 0.25 to — 0.6 at intervals of 0.025. The results have been used to calculate, to an accuracy of 0.001 to 0.01 %, the constants needed for measuring surface and interfacial tensions by the method … WebMay 23, 2024 · This paper introduces a new mathematical model that is used to compute either the interfacial tension of quiescent axisymmetric pendant/sessile drops and pendant/captive bubbles. This model consists of the Young–Laplace equation, that …
WebSep 15, 2015 · The pendant drop method is a powerful technique that can be used to accurately determine the interfacial tension. While the modern pendant drop computational routine was developed over three decades ago, [14] research into the methodology has … WebInterfacial Tension at Elevated Pressures and Temperatures. I. A. New and Improved Apparatus for Boundary- Tension Measurements by the Pendent Drop Method. The Journal of Physical and Colloid Chemistry 1948, 52 (7) , 1157-1165. …
WebSep 1, 2002 · This is analogous to the well-known improvement in determining surface tension with the pendant drop method when using larger drops. 43, 44 Another parameter that should be carefully chosen … WebAbout two years ago I was led to examine the forms of pendent drops of liquid by a method of great simplicity, which seems capable of being used with considerable accuracy for determining the value of the surface tension.
WebJun 15, 2024 · An in-house pendant drop tensiometer setup was created to measure air-liquid interfacial tension. A 22-gauge stainless steel needle (type 3, inner diameter ≈ 430 μ m, outer diameter ≈ 710 μ m) was connected to a rubber tube carrying working liquid from a syringe (BD Biocoat Disposable Syringe, Slip-Tip, volume = 10 ml) mounted on a syringe …
WebThe pendant drop techique has recently benefitted from a number of advan-cements both in terms of data acquisition and analysis. The simplest of these ... A block diagram of the experimental apparatus for boundary tension measure-ments appears in Figure 2. Fluid drops are formed at the tip of either a is chernobylite hardWebJun 17, 2024 · Abstract and Figures Modern pendant drop tensiometry relies on numerical solution of the Young-Laplace equation and allow to determine the surface tension from a single picture of a pendant... ruth volk cardosoWebJun 4, 1998 · In this study, axisymmetric forced oscillations of arbitrary amplitude of a viscous liquid drop of fixed volume which is pendant from or sessile on a rod with a fixed contact line and surrounded by an inviscid ambient gas are induced by moving the rod in the vertical direction sinusoidally in time. ruth virtuous womanWebDec 14, 2011 · 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. ruth virtuous woman in the bibleWebNov 15, 2016 · Furthermore, through a simulation study on pattern-pinned pendant drops, the vibration performance of the meniscus was revealed as a superposition of two vibration behaviors including a low-frequency vibration due to the inertia effects and a high-frequency vibration due to the surface tension gradient within the boundary region. is chernobylite goodWebPendant liquid drops have been investigated ex-tensively since the 18th century, however only in the late 20th century numerical solution techniques made it pos-sible to extract the surface tension from a single picture of a pendant drop with high precision. Before the … is chernobylite scaryWebOct 16, 2013 · I will discuss the variational approach to determining the stability of pendant liquid drops. The outline will include some theoretical aspects and questions which currently can only be answered numerically. ruth vleugels md boston mass