Simulation and validation of nonplanar nematorheology
作者:
W. H. Han,
A. D. Rey,
期刊:
Journal of Rheology
(AIP Available online 1994)
卷期:
Volume 38,
issue 5
页码: 1317-1334
ISSN:0148-6055
年代: 1994
DOI:10.1122/1.550546
出版商: The Society of Rheology
关键词: NEMATIC CRYSTALS;LIQUID CRYSTALS;ORIENTATION;SHEAR FLOW;VISCOELASTICITY;RHEOLOGY;SIMULATION;TORQUE
数据来源: AIP
摘要:
This paper presents an analysis of the fundamental role of nonplanar orientation on the complex rheological behavior of uniaxial rodlike nematic fluids. Evidence of flow‐induced nonplanar orientation is captured by three‐dimensional nonuniform orientation simulations, using the Leslie–Ericksen equations, and by scientific visualization. Unique and direct correlations between rheological material functions and the underlying nonplanar microstructure are identified and characterized. The first direct semiquantitative rheological comparisons between simulations and actual experiments, for a series of representative shear flow histories at moderate Ericksen numbers, are given. Very good agreement is found between the theoretical predictions and experimental measurements for start‐up, reversal, and cessation of isothermal, shear flows.
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