Detailed analysis of single drop coalescence—Influence of ions on film drainage and coalescence time

Mass Transfer During Droplet Formation – A Measuring Technique Study

“…In respect to this breakage can be easily linked to the energy input and correlations prove to be reliable. This is in contrast to the coalescence probability, which is highly depending on the physical properties, process conditions, and the used apparatus geometry are difficult to predict [2]. Furthermore, the direction of mass transfer is not negligible as, according to Schmidt et al [9], mass transfer from continuous to dispersed phase leads to destabilization of the interface whereas the opposite mass transfer direction leads to a stabilization of the interface.…”

“…In that respect the design of liquid-liquid extraction columns is a rather sophisticated task and preliminary pilot plant tests are necessary for reliable design [1]. The process efficiency and product quality in technical separation processes are substantially influenced by the specific interfacial area, which depends on droplet formation and the mutual effects of droplet breakage and coalescence [2,3]. Thus, the correct prediction of droplet phenomena, respectively, a detailed knowledge of the droplet size distribution (DSD) in space and time is a vital requirement for precise process design.…”

Electrocoalescence of water in oil emulsions: a DPD simulation study and a novel application of electroporation theory

“…This threshold can be used as a coalescence criterion aer the hydrodynamic draining of the oil lm is completed. 24 The predicted pore formation time delays from electroporation theory compared well to DPD simulation results.…”

“…The formation frequency of unstable pores in a lipid bilayer is 4 n c ¼ n 0 V m e Àfm/kT , (24) and the bilayer lifetime is then of the order of 1/n c . Here, n 0 is a characteristic frequency per volume, V m ¼ hA t is the total lm volume in the emulsion, with A t the total contact area between droplets, and h the characteristic lm thickness.…”

Interaction times of homogeneous and heterogeneous droplets in gases

“…No experimental data or calculations based on modeling of collision times for droplet bounce, separation, or disruption have been published so far. According to studies [14][15][16][17][18], these times are short and cannot differ significantly in such collision behaviors. Experimental data on the quantity and size of liquid fragments formed due to collisions is also scarce.…”