Rheology of Inelastic Hard Spheres at Finite Density and Shear Rate.

Rheology of Inelastic Hard Spheres at Finite Density and Shear Rate.
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有限密度和剪切速率下非弹性硬球的流变学。

DOI:
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发表时间:
2017
影响因子:
8.6
通讯作者:
M. Sperl
M. Sperl
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
W. T. Kranz;Fabian Frahsa;A. Zippelius;M. Fuchs;M. Sperl

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考虑非弹性光滑硬球的粒状流体,我们讨论了描述流变状态的条件,包括牛顿、巴尼奥尔、剪切稀化和剪切增稠行为。开发了一种在有限剪切速率和玻璃化转变密度附近的密度下有效的动力学理论,我们预测了控制参数实际相关值下的粘度和巴格诺德系数。将剪切应力 σ 与剪切速率 γ[超过 ˙] 相关的全流动曲线的确定以及屈服应力的预测完成了我们对源自第一原理的颗粒流变学的讨论。
Considering a granular fluid of inelastic smooth hard spheres, we discuss the conditions delineating the rheological regimes comprising Newtonian, Bagnoldian, shear thinning, and shear thickening behavior. Developing a kinetic theory, valid at finite shear rates and densities around the glass transition density, we predict the viscosity and Bagnold coefficient at practically relevant values of the control parameters. The determination of full flow curves relating the shear stress σ to the shear rate γ[over ˙] and predictions of the yield stress complete our discussion of granular rheology derived from first principles.
DOI: 10.1073/pnas.0905330106
发表时间: 2009-09-08
影响因子: 11.1
作者:
Brader, Joseph M.;Voigtmann, Thomas;Cates, Michael E.
通讯作者: Cates, Michael E.