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- W197675192 abstract "The oscillating-jet technique, used for some time to measure both the static and dynamic surface tension between a gas and a liquid, was extended to the measurement of the interfacial tension between two immiscible liquids. Both a theory and experimental techniques were developed. This work was undertaken in order to obtain a method of studying interfacial concentrations in liquid-liquid systems undergoing mass transfer. The mathematical derivation given is an extension of Bohr's theory for the gas-liquid case. However, since this theoretical treatment required as its input the velocity profile of the oscillating jet, an average profile was solved for in the case of a circular liquid-liquid jet. The extension of Bohr's mathematics with the incorporated velocity profile gave a mathematical expression that calculates the interfacial tension to within 25% of the actual value in most cases; a large part of the observed deviation is believed to be experimental. Data were taken on immiscible- liquid pairs whose interfacial tension ranges from 6 to 42 dyn/cm. Experimental techniques are described for preparing the elliptical nozzles, illuminating the jet properly, and measuring the wavelength of oscillation. It was found that the best methods for preparing nozzles for liquid-gas systems do not give themore » best nozzles for liquid-liquid systems. The lighting and measuring techniques are different from those used in liquid-gas systems, because of the different range of refractive-index ratio in two-liquid systems. (auth) mass transport and chemical reaction was performed, with rate constants for the carbon-carbon dioxide reaction taken from the literature. The results indicatc that extreme nonuniformity of reaction can exist even when the change in carbon dioxide concentration from the exterior of the sample to the interior is small. The results are similar to experimental determinations of nonuniformity of gasification, obtained by determining the porosity of reacted graphite samples as a function of depth from the reacting face. Experimentally nonuniformity of reaction was observed for gasification rates a hundredfold lower than the usual Thiele criteria would predict, probably because of carbon monoxide inhibition. (auth)« less" @default.
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- W197675192 date "1963-03-11" @default.
- W197675192 modified "2023-09-27" @default.
- W197675192 title "LIQUID-LIQUID INTERFACIAL-TENSION MEASUREMENT WITH AN OSCILLATING JET" @default.
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