Experimental studies on mass transfer in continuous and dispersed phases for single drops moving through liquid field at intermediate reynolds numbers

Abstract

Rates of the mass transfer in both continuous and dispersed phases were measured on single non-oscillating liquid drops moving through quiescent liquid field at Reynolds numbers ranging from 40 to 1200. The mass transfer experiments of both phases were performed on systems having high interfacial tension and iodine was used as the transferred material. For the mass transfer rate in the continuous phase, the experimental data are compared with analytical solutions obtained by use of the interfacial velocity of a drop proposed by Winnikow and Chao. For the mass transfer rate in the dispersed phase, the measured results are examined in the light of some theories proposed by other investigators. In both cases, the agreements between the experimental and the theoretical values are not satisfactory. Empirical equations for mass transfer coefficients in continuous and dispersed phases are obtained for the region of the intermediate Reynolds numbers. The drag coefficients of the drops were also measured. Although the experimental values are higher than predicted by Winnikow and Chao, the data show good agreement with the values from the literature. © 1977, The Society of Chemical Engineers, Japan. All rights reserved.