Rheological study of polymer flow past rough surfaces with slip boundary conditions

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dc.creatorNiavarani, Anoosheh
dc.creatorPriezjev, Nikolai V.
dc.date2008-01-24
dc.date2008-08-11
dc.date.accessioned2026-07-07T10:09:43Z
dc.date.available2026-07-07T10:09:43Z
dc.descriptionThe slip phenomena in thin polymer films confined by either flat or periodically corrugated surfaces are investigated by molecular dynamics and continuum simulations. For atomically flat surfaces and weak wall-fluid interactions, the shear rate dependence of the slip length has a distinct local minimum which is followed by a rapid increase at higher shear rates. For corrugated surfaces with wavelength larger than the radius of gyration of polymer chains, the effective slip length decays monotonically with increasing corrugation amplitude. At small amplitudes, this decay is reproduced accurately by the numerical solution of the Stokes equation with constant and rate-dependent local slip length. When the corrugation wavelength is comparable to the radius of gyration, the continuum predictions overestimate the effective slip length obtained from molecular dynamics simulations. The analysis of the conformational properties indicates that polymer chains tend to stretch in the direction of shear flow above the crests of the wavy surface.
dc.description22 pages, 11 figures; Web reference added for animations: http://www.egr.msu.edu/~priezjev/roughness/text.htm
dc.identifierhttps://arxiv.org/abs/0801.3828
dc.identifierhttp://arxiv.org/abs/0801.3828
dc.identifierJ. Chem. Phys. 129, 144902 (2008)
dc.identifierdoi:10.1063/1.2988496
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/171407
dc.subjectSoft Condensed Matter
dc.subjectMaterials Science
dc.subjectFluid Dynamics
dc.titleRheological study of polymer flow past rough surfaces with slip boundary conditions
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