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Time-variation of particle size distributions during coalescence, dispersion and ultrasonic emulsification

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Summary

The note briefly surveys the recent studies on the time variation of particle sizes during such processes as coalescence, heterocoagulation, electrification of aerosols, breakage of particles and emulsification. The general equations for the change of size distributions during coalescence are solved in some cases. A simple model is given for the variation of the mean size when both dispersion and coalescence are present. The results are compared with the experimental data and the stability factor, the limiting size of particles in grinding and emulsification, etc. are quantitatively discussed.

Zusammenfassung

Die vorliegende Arbeit gibt einen überblick über neue Betrachtungen zur zeitlichen Variation der Teilchengrö\en wÄhrend des Ablaufs von Prozessen wie Koaleszenz, Heterokoagulation, Elektrokoagulation von Aerosol, Zerkleinerung, Mahlung von Teilchen und Emulgierung. Die allgemeinen Gleichungen für die Änderung der Teilchengrö\en-Verteilung wÄhrend der Koaleszenz werden für einige FÄlle gelöst. Ein einfaches Modell wird für die Änderung des Mittelwerts der Teilchengrö\en gegeben, wenn beides, Dispersion und Koaleszenz, ablaufen. Die Resultate werden mit experimentellen Daten verglichen, und der StabilitÄtsfaktor, die Endgrö\e der Teilchen bei Mahlung und Emulsion usw. werden quantitativ diskutiert.

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  1. Department of Physics, Indian Institute of Science, Bangalore-12, India

    E. S. Rajagopal

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Rajagopal, E.S. Time-variation of particle size distributions during coalescence, dispersion and ultrasonic emulsification. Kolloid-Zeitschrift 167, 17–23 (1959). https://doi.org/10.1007/BF01810115

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