Sastry, Murali ; Gole, Anand ; Banpurkar, A. G. ; Limaye, A. V. ; Ogale, S. B. (2001) Variation in viscous fingering pattern morphology due to surfactant-mediated interfacial recognition events Current Science, 81 (2). pp. 191-193. ISSN 0011-3891
|
PDF
- Publisher Version
77kB |
Official URL: http://www.ias.ac.in/currsci/jul252001/191.pdf
Abstract
The study of the formation of finger-like patterns during displacement of a viscous fluid by a less viscous one is of technological importance. The morphology of the viscous-finger patterns generated is a function of many parameters such as the flow rate, difference in viscosities of the two fluids and the interfacial tension. We demonstrate herein that the morphology of patterns formed during viscous fingering in a Hele-Shaw cell during displacement of paraffin oil by aqueous solutions of the surfactant sodium dodecyl sulphate (SDS), is extremely sensitive to interfacial tension variation brought about by complexation of divalent cations with the surfactant SDS. The variation in morphology of the patterns formed has been quantified by measuring the fractal dimensions of structures formed in a radial Hele-Shaw cell as well as the average finger width in a linear Hele-Shaw cell. This technique shows promise for studying other interfacial phenomena in chemistry such as biorecognition as well as dynamic processes occurring at interfaces.
Item Type: | Article |
---|---|
Source: | Copyright of this article belongs to Current Science Association. |
ID Code: | 47265 |
Deposited On: | 07 Jul 2011 05:38 |
Last Modified: | 18 May 2016 02:59 |
Repository Staff Only: item control page