Title

Cross-Stream Migration in Dilute Solutions of Rigid Polymers undergoing Rectilinear Flow near a Wall

Abstract

Kinetic theory is used to investigate cross-stream migration of a rigid polymer undergoing rectilinear flow in the vicinity of a wall. Hydrodynamic interactions between the polymers and the boundary result in a cross-stream migration. In simple shear flow, polymers migrate away from the wall, creating a depletion layer in the vicinity of the wall which thickens as the flow strength increases relative to the Brownian force. In pressure-driven flow, an off-center maximum in the center-of-mass distribution occurs due to a competition between hydrodynamic interactions with the wall and the anisotropic diffusivity induced by the inhomogeneous flow field.

Department(s)

Chemical and Biochemical Engineering

Keywords and Phrases

Flow Fields; Hydrodynamics; Polymer Matrix; Surface Diffusion; Wall Flow; Depletion Layers; Dilute Solutions; Hydrodynamic Interactions; Rectilinear Flow; Kinetic Theory

International Standard Serial Number (ISSN)

1539-3755; 1550-2376

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2007 American Physical Society (APS), All rights reserved.

PubMed ID

17994926

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