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Boundary layers in pressure-driven flow in smectic a liquid crystals
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Metallernas gjutning.ORCID-id: 0000-0002-8318-1251
2015 (engelsk)Inngår i: SIAM Journal on Applied Mathematics, ISSN 0036-1399, E-ISSN 1095-712X, Vol. 75, nr 4, s. 1817-1851Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

This article examines the steady flow of a smectic A liquid crystal sample that is initially aligned in a classical "bookshelf" geometry confined between parallel plates and is then subjected to a lateral pressure gradient which is perpendicular to the initial local smectic layer arrangement. The nonlinear dynamic equations are derived. These equations can be linearized and solved exactly to reveal two characteristic length scales that can be identified in terms of the material parameters and reflect the boundary layer behavior of the velocity and the director and smectic layer normal orientations. The asymptotic properties of the nonlinear equations are then investigated to find that these length scales apparently manifest themselves in various aspects of the solutions to the nonlinear steady state equations, especially in the separation between the orientations of the director and smectic layer normal. Non-Newtonian plug-like flow occurs and the solutions for the director profile and smectic layer normal share features identified elsewhere in static liquid crystal configurations. Comparisons with numerical solutions of the nonlinear equations are also made.

sted, utgiver, år, opplag, sider
2015. Vol. 75, nr 4, s. 1817-1851
Emneord [en]
smectic A liquid crystals, flow dynamics, continuum theory, analytic solution
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-174006DOI: 10.1137/140983483ISI: 000360649400019Scopus ID: 2-s2.0-84940706112OAI: oai:DiVA.org:kth-174006DiVA, id: diva2:857783
Merknad

QC 20150930

Tilgjengelig fra: 2015-09-30 Laget: 2015-09-24 Sist oppdatert: 2017-12-01bibliografisk kontrollert

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