A new rate-independent tensorial model for suspensions of noncolloidal rigid particles in Newtonian fluids
A new rate-independent tensorial model for suspensions of noncolloidal rigid particles in Newtonian fluids
复制标题
牛顿流体中非胶体刚性颗粒悬浮液的新型速率无关张量模型
DOI：
10.1122/1.4995817
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发表时间：
2018
影响因子：
3.3
通讯作者：
G. Chambon
中科院分区：
文献类型：
--
作者：
Olivier Ozenda;P. Saramito;G. Chambon
我们提出了一个新的，最小的张量模型试图清楚地代表微观结构的刚性颗粒的非胶体悬浮液的粘度的作用。定性，该模型证明能够再现几个主要的流变趋势所表现出的浓悬浮液：各向异性和前后不对称的微观结构，在简单的剪切和瞬态松弛的微观结构向其稳定状态。该模型只包括几个本构参数，具有明确的物理意义，可以通过与实验数据的比较来确定。因此，定量预测剪切反转后观察到的复杂的瞬态演变的表观粘度再现了大范围的体积分数。与微观结构数据的比较表明，不仅耗尽角，但对分布函数，以及预测。据我们所知，这是第一次，一个基于微观结构的流变学模型成功地比较了这样一个广泛的实验dataset.We提出了一个新的，最小张量模型试图清楚地代表微观结构的刚性颗粒的非胶体悬浮液的粘度的作用。定性，该模型证明能够再现几个主要的流变趋势所表现出的浓悬浮液：各向异性和前后不对称的微观结构，在简单的剪切和瞬态松弛的微观结构向其稳定状态。该模型只包括几个本构参数，具有明确的物理意义，可以通过与实验数据的比较来确定。因此，定量预测剪切反转后观察到的复杂的瞬态演变的表观粘度再现了大范围的体积分数。与微观结构数据的比较表明，不仅耗尽角，但对分布函数，以及预测。据我们所知，这是第一次，一个基于微观结构的流变模型成功地比较了这样一个广泛的…
We propose a new, minimal tensorial model attempting to clearly represent the role of microstructure on the viscosity of noncolloidal suspensions of rigid particles. Qualitatively, this model proves capable of reproducing several of the main rheological trends exhibited by concentrated suspensions: Anisotropic and fore-aft asymmetric microstructure in simple shear and transient relaxation of the microstructure toward its stationary state. The model includes only few constitutive parameters, with clear physical meaning, that can be identified from comparisons with experimental data. Hence, quantitative predictions of the complex transient evolution of apparent viscosity observed after shear reversals are reproduced for a large range of volume fractions. Comparisons with microstructural data show that not only the depletion angle, but the pair distribution function, are well predicted. To our knowledge, it is the first time that a microstructure-based rheological model is successfully compared to such a wide experimental dataset.We propose a new, minimal tensorial model attempting to clearly represent the role of microstructure on the viscosity of noncolloidal suspensions of rigid particles. Qualitatively, this model proves capable of reproducing several of the main rheological trends exhibited by concentrated suspensions: Anisotropic and fore-aft asymmetric microstructure in simple shear and transient relaxation of the microstructure toward its stationary state. The model includes only few constitutive parameters, with clear physical meaning, that can be identified from comparisons with experimental data. Hence, quantitative predictions of the complex transient evolution of apparent viscosity observed after shear reversals are reproduced for a large range of volume fractions. Comparisons with microstructural data show that not only the depletion angle, but the pair distribution function, are well predicted. To our knowledge, it is the first time that a microstructure-based rheological model is successfully compared to such a wid...