title: Shear-induced undulation of smectic-A: Molecular Dynamics simulations vs. analytical theory.
abstract: Experiments on a variety of systems have shown that layered liquids are unstable under shear even if the liquid layers are planes of constant velocity. We investigate the stability of smectic- A like liquids under shear using Molecular Dynamics simulations and a macroscopic hydrodynamic theory (including the layer normal and the director as independent variables). Both methods show an instability of the layers, which sets in above a critical shear rate. We find a remarkable qualitative and reasonable quantitative agreement between both methods for the spatial homogeneous state and the onset of the instability.
authors.affiliation: Max-Planck-Institut für Polymerforschung, 55021 Mainz, Germany. Thomas.Soddemann@rzg.mpg.de
authors.forename: Th
authors.initials: T
authors.lastname: Soddemann
authors.forename: G K
authors.initials: GK
authors.lastname: Auernhammer
authors.forename: H
authors.initials: H
authors.lastname: Guo
authors.forename: B
authors.initials: B
authors.lastname: Dünweg
authors.forename: K
authors.initials: K
authors.lastname: Kremer
mesh_terms: D003198:Computer Simulation; D046911:Macromolecular Substances; D015233:Models, Statistical; D008962:Models, Theoretical; D055585:Physical Phenomena; D010825:Physics; D011108:Polymers / Q000737:chemistry; D013314:Stress, Mechanical; D013816:Thermodynamics; D013997:Time Factors
chemical_list: D046911:Macromolecular Substances; D011108:Polymers; C422409:liquid crystal polymer