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The spatial inhomogeneity of rodlike polymeric systems subject to simple shear flow
Author(s) -
Ding Jiandong,
Yang Yuliang
Publication year - 1995
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19950960111
Subject(s) - simple shear , rheology , shear flow , brownian dynamics , shear (geology) , statistical physics , planar , gaussian , shear rate , brownian motion , mechanics , shear stress , materials science , flow (mathematics) , oscillation (cell signaling) , distribution function , classical mechanics , physics , thermodynamics , mathematics , chemistry , statistics , computer science , composite material , biochemistry , quantum mechanics , computer graphics (images)
A novel simulation approach has been developed by the combination of Brownian dynamics and Lebwohl‐Lasher nematogen potential, by which we have made preliminary investigation on the spatial inhomogeneity of nematic rodlike polymeric system with planar surface anchoring and subject to simple shear flow. Some rheological behaviors such as the damped oscillation of stresses with time or the negative first normal stress difference at moderate shear rate find good agreement with previous experimental observations reported in literature. The distribution function of rod orientation takes on “breathe‐like” time‐evolution and is verified not Gaussian‐featured. The layered director, order parameter, shear stress and first normal stress difference have also been calculated by statistics, and most importantly, all of these statistic quantities show spatial distribution in different layers and corresponding distribution functions are time‐dependent. Therefore, our simulation implies the complicated pattern formation and pattern evolution in this system. It is, hence, very meaningful to further study the spatial inhomogeneity of rodlike polymers under shear flow extensively both in theory and in experiment.