Migration of semiflexible polymers in microcapillary flow

被引：67

作者：

Chelakkot, Raghunath ^{[1
]}

Winkler, Roland G. ^{[1
]}

Gompper, Gerhard ^{[1
]}

机构：

[1] Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany

来源：

EPL | 2010年 / 91卷 / 01期

关键词：

MULTIPARTICLE COLLISION DYNAMICS; SHEAR-INDUCED MIGRATION; SIMULATION; CHAIN; HYDRODYNAMICS; TRANSPORT;

D O I：

10.1209/0295-5075/91/14001

中图分类号：

O4 [物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

The non-equilibrium structural and dynamical properties of a semiflexible polymer confined in a cylindrical microchannel and exposed to a Poiseuille flow is studied by mesoscale hydrodynamic simulations. For a polymer with a length half of its persistence length, large variations in orientation and conformations are found as a function of radial distance and flow strength. In particular, the polymer exhibits U-shaped conformations near the channel center. Hydrodynamic interactions lead to strong cross-streamline migration. Outward migration is governed by the polymer orientation and the corresponding anisotropy in its diffusivity. Strong tumbling motion is observed, with a tumbling time which exhibits the same dependence on Peclet number as a polymer in shear flow. Copyright (C) EPLA, 2010

引用

页数：6

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