Tropfenbewegung und Stofftransport in technischen Flüssig/flüssig-Systemen. Teil 2: Auswirkung von Grenzflächeneffekten und Verunreinigungen

The design of a liquid/liquid contact apparatus necessitates the knowledge of fluid dynamics and mass transfer in the dispersion. Prediction of process parameters is challenging due to swarm and interfacial effects. Single drop investigations are suitable to enable a sophisticated dimensioning based on few simple experiments combined with published theories and correlations. In the first part of this article, the fundamentals of fluid dynamics and mass transfer in absence of interfacial effects were explained. Here, an overview of relevant interfacial phenomena and the influence of different substances typically occurring in technical applications as impurities or accompanying components is given.     

Tropfenbewegung und Stofftransport in technischen Flüssig/flüssig-Systemen. Teil 1: Einzeltropfensedimentation ohne Grenzflächeneffekte

The design of a liquid-liquid contact apparatus necessitates the knowledge of fluid dynamics and mass transfer in the dispersion. Since swarm effects and interfacial phenomena induce complex interactions the prediction of process parameters is a challenging task. Single-drop investigations are suited to enable a sophisticated dimensioning based on few simple experiments in combination with published theories and correlations available from literature. This two-part article deals with the fundamentals of fluid dynamics and mass transfer of single droplets and evaluates occurrence and impact of interfacial effects as well as impurities typical for technical applications.