| |
 |
UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:52 |
 |
|
|
|
Conference: Bucharest University Faculty of Physics 2005 Meeting
Section: Polymer Physics
Title:
Marangoni-Driven Finger Formation
at a Two Fluid Interface
Authors:
L.Georgescu,C.Miron,V.Barna
Affiliation:
University of Bucharest, Faculty of Physics
E-mail
barna_emil@yahoo.com
Keywords:
surface tension,Marangoni phenomena
Abstract:
Marangoni phenomena are driven by gradients in surface
tension on the interface of a fluid. The gradients in surface tension can arise from an uneven distribution of surfactant molecules on the surface of the fluid or from
temperature gradients along the interface.
Gradients in surface tension induce the flow of fluid
on the interface from areas of low surface tension to areas of high surface tension, or equivalently, fluid will flow from areas of high temperature to areas of low temperature on the interface. Marangoni phenomena are believed to be the cause of the formation of finger-like structures during some interfacial polymerizations. Perturbation of the interface can lead to an instability causing the finger-like formation that is observed. This report presents the results of a linear stability analysis of the formation of “fingers” on a simplified two-fluid
system.
|
|
|
|