By using the trapping microphotographical technique

the drop size distribution of the aviation kerosene and carbon tetrachloride mixture-deionized water system has been measured in three stirred tanks of 184

287 and 494 mm in diameter with impellers of the frame-plate type. Based upon the mechanism of dispersion

model relations have been proposed and the model parameters determined by experiments. So a relation of the variation of drop size distribution with equipment geometry

operation parameters and phase ratio has been given. According to this relation

some relevant scale-up criteria have been obtained.