Intermittent dynamics in transient polymer networks under shear: signs of self-organized criticality.
In this paper we demonstrate an unusual behavior in the shear-banded flow of a viscoelastic fluid. We report large and patterned fluctuations in the shear stress in an apparently fluid material undergoing steady shear, which we interpret as an intermittent and microscopic fracture and self-healing process. The statistical pattern of the fluctuations is indicative of self-organized criticality, and their magnitude can be directly related to the constitutive instability that underlies the shear banding.
Sprakel
Joris
J
Laboratory of Physical Chemistry and Colloid Science, Wageningen University, Dreijenplein 6, 6703 HB Wageningen, The Netherlands. joris.sprakel@wur.nl
Spruijt
Evan
E
Stuart
Martien A Cohen
MA
Michels
Matthias A J
MA
van der Gucht
Jasper
J