Unifying Suspension and Granular Rheology
Unifying Suspension and Granular Rheology
复制标题
DOI：
10.1103/physrevlett.107.188301
复制
发表时间：
2011-10-24
影响因子：
8.6
通讯作者：
Pouliquen, Olivier
中科院分区：
文献类型：
--
作者：
Boyer, Francois;Guazzelli, Elisabeth;Pouliquen, Olivier
使用一个原始的压力施加剪切单元，我们研究了稠密悬浮液的流变学。我们表明，他们表现出类似于颗粒介质的粘塑性行为成功地描述了摩擦流变学和充分的特征在于由摩擦系数μ和体积分数φ的演变与无量纲粘性数I（V）。因此，稠密悬浮体和颗粒介质统一在一个共同的框架下。这些结果被证明是兼容的经典经验模型的悬浮液流变学，并提供了一个明确的确定本构关系接近堵塞过渡。
Using an original pressure-imposed shear cell, we study the rheology of dense suspensions. We show that they exhibit a viscoplastic behavior similarly to granular media successfully described by a frictional rheology and fully characterized by the evolution of the friction coefficient mu and the volume fraction phi with a dimensionless viscous number I(v). Dense suspension and granular media are thus unified under a common framework. These results are shown to be compatible with classical empirical models of suspension rheology and provide a clear determination of constitutive laws close to the jamming transition.