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Polymer margination in uniform shear flows

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Abstract

We address the issue of polymer margination (migration towards surfaces) in uniform shear flows through extensive LBMD (lattice-Boltzmann molecular dynamics) simulations. In particular we consider the effect of monomer size, a on the chain's overall margination tendency for chains of length N = 16, 32 monomers in flows at multiple shear rates [small gamma, Greek, dot above]. We observed higher margination of chains with larger radii monomers in comparison to smaller radii monomer chains of the same length N. We quantify this effect by considering various measures such as the distribution of the maximum extent of the chain into the channel bulk, zm, distribution of its center of mass in the direction normal to the surface, zc and the distributions of the chain's radius of gyration in directions parallel and perpendicular to the surface i.e. Rx, Ry and Rz respectively.

Graphical abstract: Polymer margination in uniform shear flows

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Publication details

The article was received on 13 Jul 2018, accepted on 30 Oct 2018 and first published on 01 Nov 2018


Article type: Paper
DOI: 10.1039/C8SM01445K
Citation: Soft Matter, 2018, Advance Article
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    Polymer margination in uniform shear flows

    V. Balasubramanian and C. Denniston, Soft Matter, 2018, Advance Article , DOI: 10.1039/C8SM01445K

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