Interfacial phenomena and mass transfer

✍ Scribed by C.A.P. Bakker; P.M. van Buytenen; W.J. Beek

• Publisher: Elsevier Science
• Year: 1966
• Tongue: English
• Weight: 656 KB
• Volume: 21
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(66)85099-6

✦ Synopsis

This paper contributes to the study of interfacial phenomena with respect to mass transfer in three ways:

(1) Solutes are classified quantitatively according to their ability to impede or promote movement of a free interface. Within this scheme the influence of concentration of the solute on the obstruction of movement can also be explained.

(2) Interfacial movement induced by differences in interfacial tension is divided into two categories: large scale and micro scale movement. The importance of this differentiation is stressed in a discussion on observations of growing droplets to which or from which a solute is transferred.

(3) A schlieren optical study of the microscale behaviour of the interface during extraction revealed that the mean cell size and the penetration depth are of the same order of magnitude. This fact could be made acceptable. From this the ratio of the rates of mass transfer with and without cells could be. estimated; the predicted values of this ratio, 2 to 3, are in accordance with published results.