Mesoscale simulations of polymer dynamics in microchannel flows

Details Mesoscale simulations of polymer dynamics in microchannel flows Mesoscale simulations of polymer dynamics in microchannel flows

2007-09-24

arxiv.org/abs/0709.3822v1

EPL, 83, 34007 (2008)

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

10.1209/0295-5075/83/34007

The non-equilibrium structural and dynamical properties of flexible polymers confined in a square microchannel and exposed to a Poiseuille flow are investigated by mesoscale simulations. The chain length and the flow strength are systematically varied. Two transport regimes are identified, corresponding to weak and strong confinement. For strong confinement, the transport properties are independent of polymer length. The analysis of the long-time tumbling dynamics of short polymers yields non-periodic motion with a sublinear dependence on the flow strength. We find distinct differences for conformational as well as dynamical properties from results obtained for simple shear flow.

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