New Methods of Measuring the Surface-tension of Liquids
Author: Thomas Proctor Hall
Publisher:
Published: 1893
Total Pages: 29
ISBN-13:
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Author: Thomas Proctor Hall
Publisher:
Published: 1893
Total Pages: 29
ISBN-13:
DOWNLOAD EBOOKAuthor: S. J. Kennedy
Publisher:
Published: 1932
Total Pages:
ISBN-13:
DOWNLOAD EBOOKAuthor: Noah Ernest Dorsey
Publisher:
Published: 1926
Total Pages: 40
ISBN-13:
DOWNLOAD EBOOKAuthor:
Publisher:
Published: 1994
Total Pages: 58
ISBN-13:
DOWNLOAD EBOOKA simple and accurate technique has been developed for measuring dynamic surface tension. The new technique is based on growing a drop at the end of a fine capillary into another immiscible fluid and can follow the changes in tension at a freshly formed interface during its entire period of evolution. When the relative importance of the surface tension force is large compared to gravitational and viscous forces, shapes of growing drops are sections of spheres and the difference in pressure between the interior and the exterior of the drop {triangle}p is related to the surface tension [sigma] and the radius of curvature R by the static Young-Laplace formula {triangle}p = 2[sigma]/R. In contrast to related work, the new technique can determine the surface tension of an interface with a surface age of a few to tens of milliseconds by measuring transient drop shapes and pressures in 1/6 to 1 millisecond. The capabilities of the new method are demonstrated by performing tension measurements on liquid systems that do not exhibit dynamic surface tension as well as ones that exhibit significant dynamic tension effects. Tension measurements made with surfactant-laden solutions show that variation of surface tension is nonmonotonic in time. In such systems, the dynamic behavior of surface tension is shown to depend upon both the rate of interfacial dilatation and that of surfactant transport. A maximum in the surface tension is attained when the lowering of the surfactant concentration on the drop interface due to its dilatation is balanced by the addition of fresh surfactant to the interface by convection and diffusion.
Author: Lowell Clemens Warner
Publisher:
Published: 1934
Total Pages: 52
ISBN-13:
DOWNLOAD EBOOKAuthor: Edward Chapman Converse
Publisher: Forgotten Books
Published: 2017-10-21
Total Pages: 58
ISBN-13: 9780282775858
DOWNLOAD EBOOKExcerpt from An Experimental Determination of the Surface Tension of Liquid Air The frame must be raised several centimeters above the surface of the liquid before the true films form. It was found that the force required to raise the frame increased with the distance, up to a certain point, then decreased again. The pull at this point is known as the maximum weight and serves as a'basis for another method of measuring surface tension. This method can be used to advantage upon liquids whose films are too delicate to hold long enough for direct measurement of their tension. The excess of weight over the tension of films is due chiefly to the weight of the liquid held between them, Corrections must'hs applied for this and for buoyancy, pull upon the sides of the frame due to surface tension, etc. Otherwise the method is the same as above. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: R. S. Burdon
Publisher: Cambridge University Press
Published: 2014-06-12
Total Pages: 113
ISBN-13: 1107666570
DOWNLOAD EBOOKFirst published in 1949, this book assesses the phenomena of surface tension and spreading for various liquids.
Author: David Wyeth Hoffman
Publisher:
Published: 1959
Total Pages: 164
ISBN-13:
DOWNLOAD EBOOKAuthor: H. W. Fox
Publisher:
Published: 1951
Total Pages: 10
ISBN-13:
DOWNLOAD EBOOKAuthor: Can Cinbis
Publisher:
Published: 1992
Total Pages: 382
ISBN-13:
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