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首页> 外文期刊>The Journal of Chemical Physics >Flow curves of dense colloidal dispersions:Schematic model analysis of the shear-dependent viscosity near the colloidal glass transition
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Flow curves of dense colloidal dispersions:Schematic model analysis of the shear-dependent viscosity near the colloidal glass transition

机译：稠密胶体分散体的流动曲线：胶体玻璃化转变附近剪切相关粘度的示意图模型分析

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摘要

A recently proposed schematic model for the nonlinear rheology of dense colloidal dispersions is compared to flow curves measured in suspensions that consist of thermosensitive particles.The volume fraction of this purely repulsive model system can be adjusted by changing temperature.Hence,high volume fractions(phi<=0.63)can be achieved in a reproducible manner.The quantitative analysis of the flow curves suggests that the theoretical approach captures the increase of the low shear viscosity with increasing density,the shear thinning for increasing shear rate,and the yielding of a soft glassy solid.Variations of the high shear viscosity can be traced back to hydrodynamic interactions which are not contained in the present approach but can be incorporated into the data analysis by an appropriate rescaling.
机译：将最近提出的稠密胶体分散体非线性流变性的示意性模型与由热敏颗粒组成的悬浮液中测得的流动曲线进行了比较。可以通过改变温度来调节这种纯排斥模型系统的体积分数。因此，高体积分数（phi <= 0.63）是可以重现的。流动曲线的定量分析表明，理论方法可以捕捉到低剪切粘度随密度的增加而增加，剪切稀化以提高剪切速率以及软屈服的情况。高剪切粘度的变化可以追溯到本发明方法中未包含的流体动力学相互作用，但是可以通过适当的重新定标将其纳入数据分析中。

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