Dynamical Behaviour in the nonlinear rheology of surfactant solutions

Bandyopadhyay, Ranjini; Sood, A.K.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/4669

Full metadata record

DC Field	Value	Language
dc.contributor.author	Bandyopadhyay, Ranjini	-
dc.contributor.author	Sood, A.K.	-
dc.date.accessioned	2012-06-09T10:30:53Z	-
dc.date.available	2012-06-09T10:30:53Z	-
dc.date.issued	2000	-
dc.identifier.citation	Statitical Physics", AIP conference proceedings 519, 2000	en
dc.identifier.uri	http://hdl.handle.net/2289/4669	-
dc.description	Restricted Access.	en
dc.description.abstract	Several surfactant molecules self-assemble in solution to form long, flexible wormlike micelles which get entangled with each other, leading to viscoelastic gel phases. We discuss our recent work on the rheology of such a gel formed in the dilute aqueous solutions of a surfactant CTAT. In the linear rheology regime, the storage modulus $G^{\prime}(\omega)$ and loss modulus $G^{\prime\prime}(\omega)$ have been measured over a wide frequency range. In the nonlinear regime, the shear stress $\sigma$ shows a plateau as a function of the shear rate $\dot\gamma$ above a certain cutoff shear rate $\dot\gamma_c$. Under controlled shear rate conditions in the plateau regime, the shear stress and the first normal stress difference show oscillatory time-dependence. The analysis of the measured time series of shear stress and normal stress has been done using several methods incorporating state space reconstruction by embedding of time delay vectors.The analysis shows the existence of a finite correlation dimension and a positive Lyapunov exponent, unambiguously implying that the dynamics of the observed mechanical instability can be described by that of a dynamical system with a strange attractor of dimension varying from 2.4 to 2.9.	en
dc.language.iso	en	en
dc.publisher	IOP Science	en
dc.relation.uri	http://arxiv.org/abs/cond-mat/0008007	en
dc.relation.uri	http://dx.doi.org/10.1063/1.1291520	en
dc.rights	2000 Institute of Physics	en
dc.title	Dynamical Behaviour in the nonlinear rheology of surfactant solutions	en
dc.type	Article	en
Appears in Collections:	Research Papers (SCM)

Files in This Item:

File	Description	Size	Format
2000_Statistical Physics_Ed by Tokuyama and Stanley_p40.pdf Restricted Access	Restricted Access	814.25 kB	Adobe PDF	View/Open Request a copy

Show simple item record