Results 261 to 270 of about 233,669 (326)

Experimental study on the measurement criteria for measuring surface tension in oil/refrigerant mixtures by maximum bubble pressure method

open access: closedColloids and Surfaces A: Physicochemical and Engineering Aspects
Wannarat Rakpakdee   +4 more
semanticscholar   +3 more sources

Surface tension measurement of oil/refrigerant mixture by maximum bubble pressure method

International Journal of Refrigeration, 2017
Abstract Lubrication oil used in refrigerant compressors forms oil mist in the compressor shell. Some of the oil mist is discharged into a refrigeration cycle with refrigerant and causes degradation of heat transfer in heat exchangers. Since the generation of the oil mist is related to the Weber number, it is necessary to measure the surface tension ...
Mitsuhiro Fukuta   +3 more
openaire   +2 more sources

The maximum bubble pressure method of measuring surface tension, revisited

Colloids and Surfaces, 1990
Abstract The maximum bubble pressure method can give precise and accurate values of the equilibrium surface tension as well as of the dynamic surface tension at clearly defined bubble ages as given by the bubble intervals. Each bubble samples a fresh, substantially clean surface and the sensitivity can be mdyn cm−1.
K. J. Mysels
openaire   +2 more sources

The measurement of dynamic surface tension by the maximum bubble pressure method

Colloid & Polymer Science, 1994
The principle of maximum pressure in a bubble for measurements of dynamic surface tension is realized in a fully automatically operating apparatus. The set-up yields data in the time interval from 1 ms up to several seconds and can be temperature controlled from 5° to 80°C.
Fainerman, V., Miller, R., Joos, P.
openaire   +3 more sources

Dynamic Surface Tension of Micellar Triton X-100 Solutions by the Maximum-Bubble-Pressure Method

Journal of Colloid and Interface Science, 1994
Abstract The dynamic maximum-bubble-pressure method was used to measure the dynamic surface tension of Triton X-100 solutions (at the CMC and at concentrations above the CMC). Measurements were performed at 30.0, 40.0, 50.0, and 60.0°C. The results at 30.0°C are in excellent agreement with the data obtained through other methods (oscillating jet and ...
Makievski, A.V.   +2 more
openaire   +3 more sources

Dynamic surface tension of micellar solutions studied by the maximum bubble pressure method. 1. Experiment

Colloid & Polymer Science, 1992
The effect of the micelles on the dynamic surface tension of micellar surfactant solutions is studied experimentally by means of the maximum bubble pressure method. Different frequencies of bubbling ranging approximately between 1 and 30 s−1 are applied. The time dependence of the surface tension is calculated using a dead time correction.
Tz. H. Iliev, C. D. Dushkin
openaire   +2 more sources

The measurement of dynamic surface tensions of highly viscous liquids by the maximum bubble pressure method

Colloids and Surfaces A: Physicochemical and Engineering Aspects, 1993
Abstract A newly designed apparatus based on the principle of maximum bubble pressure can be used for measuring the dynamic surface tension in a time interval from 1 ms to 10 s. The surface tension values for pure liquids obtained at small lifetimes are influenced by hydrodynamic effects.
Fainerman, V., Makievski, A., Miller, R.
openaire   +3 more sources

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