Yielding and large deviations in micellar gels: a model


Autoria(s): Nandi, Saroj Kumar; Chakraborty, Bulbul; Sood, AK; Ramaswamy, Sriram
Data(s)

2013

Resumo

We present a simple model that can be used to account for the rheological behaviour observed in recent experiments on micellar gels. The model combines attachment detachment kinetics with stretching due to shear, and shows well-defined jammed and flowing states. The large-deviation function (LDF) for the coarse-grained velocity becomes increasingly non-quadratic as the applied force F is increased, in a range near the yield threshold. The power fluctuations are found to obey a steady-state fluctuation relation (FR) at small F. However, the FR is violated when F is near the transition from the flowing to the jammed state although the LDF still exists; the antisymmetric part of the LDF is found to be nonlinear in its argument. Our approach suggests that large fluctuations and motion in a direction opposite to an imposed force are likely to occur in a wider class of systems near yielding.

Formato

application/pdf

Identificador

http://eprints.iisc.ernet.in/46403/1/jl_sta_mec_the_exp_p02027_2013.pdf

Nandi, Saroj Kumar and Chakraborty, Bulbul and Sood, AK and Ramaswamy, Sriram (2013) Yielding and large deviations in micellar gels: a model. In: JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT .

Publicador

IOP PUBLISHING LTD

Relação

http://dx.doi.org/10.1088/1742-5468/2013/02/P02027

http://eprints.iisc.ernet.in/46403/

Palavras-Chave #Physics
Tipo

Journal Article

PeerReviewed