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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 21, Number 4
BKCSDE 21(4)
April 20, 2000

Title	Nonequilibrium Molecular Dynamics Simulation Study on the Shear-Induced Orientational Change of Rodlike Molecules
Author	Changjun Lee, Hoon-goo Sim, Woonchun Kim, Song Hi Lee, Hyungsuk Pak *
Keywords
Abstract	We present the results of computer simulation for the steady shear flows of rodlike molecules using nonequi-librium molecular dynamics simulation (NEMD) method. The model particle is a rigid rod composed of lin-early connected 6-sites and the Lennard-Jones 12-6 potential governs interactions between sites in different molecules. The system of rodlike molecules exhibits the change of orientational structure, that is, isotropic-nematic transition at high shear rates. We elucidate the nature of the ordered system developed from an isotro-pic phase by steady shear through an analysis of various quantities: orientational order parameters, orientational pair correlation functions, orientational distribution function, and snapshots of configurations. The effects of temperature and density on the shear rate dependence of orientational structure are described.
Page	434 - 440
Full Text	PDF

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