Deformation of a flexible polymer in a random flow with long correlation time
Chaotic Dynamics
2012-07-30 v1
Abstract
The effects induced by long temporal correlations of the velocity gradients on the dynamics of a flexible polymer are investigated by means of theoretical and numerical analysis of the Hookean and FENE dumbbell models in a random renewing flow. For Hookean dumbbells, we show that long temporal correlations strongly suppress the Weissenberg-number dependence of the power-law tail characterising the probability density function (PDF) of the elongation. For the FENE model, the PDF becomes bimodal, and the coil-stretch transition occurs through the simultaneous drop and rise of the two peaks associated with the coiled and stretched configurations, respectively.
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Cite
@article{arxiv.1012.1978,
title = {Deformation of a flexible polymer in a random flow with long correlation time},
author = {Stefano Musacchio and Dario Vincenzi},
journal= {arXiv preprint arXiv:1012.1978},
year = {2012}
}
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10 pages