Fluid‐fluid interactions and hydrodynamics in agitated dispersions: A simulation model

A model which accounts for complex fluid-fluid interactions and hydrodynamic effects in a fully baffled turbulently agitated dispersed phase system for batch, semi-batch, or continuous operation is developed. Both micromixing and macromixing effects on particle size distributions are taken into account. Coalescence and breakage functions are developed and examples are given of the normalized number and/or volume size distributions for various vessel regions. Calculated distributions are compared with experimental data to estimate values of coalescence and breakage parameters. Effects of coalescence, breakage, and system parameters on transient and steady state distributions are determined. On a mis au point un modele qui tient compte des actions reciproques et complexes de deux fluides dans un systeme a phase dispersee, completement en chicane et agite d'une maniere turbulente; ce modele a ete employe pour des operations continues, semi-continues et discontinues. On a considere a la fois les effets du micro-melange et du macro-melange sur la distribution des dimensions des particules. Des fonctions de coalescence et de fragmentation ont pris naissance et l'on donne des exemples du nombre normalise et/ou de la distribution des dimensions des particules en volume pour diverses regions du recipient. On a compare les distribution calculees avec les resultats experimentaux pour evalner les parametres de coalescence et de fragmentation. On a determine les effets des parametres de coalescence et de fragmentation ainsi que ceux du systeme sur la distribution des regimes transitoires et permanents.

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