Drop Breakup in Stirred-Tank Contactors. Part III: Correlations for Mean Size and Drop Size Distribution.
Calabrese, Richard V.
Bryner, Nelson P.
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In Part II, the extent to which dispersed-phase viscosity and interfacial tension influence equilibrium mean drop size and drop size distribution was determined for dilute suspensions produced in baffled cylindrical tanks of standard geometry equipped with six-blade Rushton turbines. Low to moderate viscosity dispersed- phase systems behaved similarly in that Sauter mean diameter could be correlated using the mechanistic arguments of Part I, and drop sizes, normalized with respect to D_32, could be correlated by a normal distribution in volume. Limited moderate viscosity data were reported in Part I but were not used to develop the correlations of Part II. The objective of this study is to combine the low to moderate viscosity data of Parts I and II with those obtained by other investigators to obtain correlations of broader utility, and to extend these via mechanistic arguments so that they apply to nondilute systems.