Stress Components and Shear Thickening of Concentrated Hard Sphere Suspensions
Stress Components and Shear Thickening of Concentrated Hard Sphere Suspensions
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DOI：
10.1021/la000050h
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发表时间：
2000-09
期刊：
影响因子：
3.9
通讯作者：
Vincent T. O'Brien and;M. Mackay
中科院分区：
文献类型：
--
作者：
Vincent T. O'Brien and;M. Mackay
The elastic-like and viscous-like viscosity components of model, Brownian hard sphere suspensions were determined. The elastic-like component, sometimes called the thermodynamic component, is due to Brownian motion while the viscous-like component, sometimes called the hydrodynamic component, is due to hydrodynamic interaction between and drag on the particles. The three volume fractions tested were found to be above the glass transition volume fraction due to the absence of a zero shear viscosity. The hydrodynamic viscosity component was approximately independent of shear rate, yet the suspension demonstrated a large amount of shear thinning which was due to the elastic-like component. The measured stress components associated with shear thickening were distinctly different in each sample. Continuous shear thickening was measured for the sample with 0.54 volume fraction while the samples with volume fractions 0.59 and 0.63 showed discontinuous shear thickening. Shear thickening in these concentrated susp...
