Abstract
Mass transfer rate in the dispersed phase was measured on single drops falling or rising with oscillation of oblate-prolate type through stationary liquid fields. The two-liquid systems used were water and aqueous glycerine solution drops in benzene and in carbon tetrachloride, and water drops in toluene. The iodine was used as the solute which transferred from the drops to the organic solvents. The moving behavior of the oscillating water drops during mass transfer was investigated in regard to frequencies, amplitudes and terminal velocities of the drops by use of a high-speed cine camera. Experimental dispersed-phase Sherwood number is correlated with the dispersed-phase Schmidt number and the modified Reynolds number which is defined by use of diameter, frequency and kinetic viscosity of the dispersed phase. The extraction efficiency obtained is also compared with the model of Angelo et al., and it is found that the experimental results were explained satisfactorily by use of their model. An empirical equation for the critical drop diameter of the oscillation onset is also obtained.
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