Koaleszenz in vertikalen dichtgepackten Dispersionen

Coalescence in vertical close packed dispersions . Models are presented for the description of growing, decomposing, and steady‐state dispersions. They contain the velocity of the dispersed phase V 0 , the initial drop diameter Φ 0 , the hold‐up ε , and the coalescence times between the drops τ and at the free interface, τ i . The height H of a steady‐state dispersion is calculated from the equation\documentclass{article}\pagestyle{empty}\begin{document}$$ H = \frac{{6V_0 \tau }}{{\bar \varepsilon }}\ln \frac{{3V_0 \tau _{\rm i} }}{{{\rm 2}\phi _{\rm 0} }}. $$\end{document} The values of τ and τ i were determined experimentally for two liquid/liquid systems with the use of a model of a steady‐state dispersion and used for predicting growth and decomposition rates in good agreement with experiment.