COALESCENCE AND DISPERSON RATES IN AGITATED LIQUID-LIQUID SYSTEMS

摘要

In previous work at this Laboratory, the drop diameter at the impeller tip (also referred to as the minimum drop diameter) of a mixture of two immiscible liquids in a stirred tank has been found to be a function of Weber number and of a volume-fraction parameter.nThis study has aimed at determining the variables affecting the coalescence of droplets after they leave the impeller tip. The resulting correlation shows that the mean drop diameter at any position in a stirred tank can be expressed as the sum of the equilibrium drop di¬ameter and an incremental coalescence term which is a function of viscosities, densities, volume fraction, and Weber and Reynolds numbers.