论文标题
在不均匀流下的密集悬浮液中建模微观结构和应力
Modelling the Microstructure and Stress in Dense Suspensions Under Inhomogeneous Flow
论文作者
论文摘要
在不均匀的流动下，密集的悬浮液表现出复杂的行为，违反了常规的同质流变学。具体而言，人们发现宏观摩擦系数低于屈服标准的流动区域，并且在干扰标准上方的体积分数。我们通过将剪切速率波动纳入微观结构和应力的最近提出的张量模型，并将模型应用于不均匀的流动问题来证明基本物理。模型预测与基于粒子的模拟定性一致。
Under inhomogeneous flow, dense suspensions exhibit complex behaviour that violates the conventional homogenous rheology. Specifically, one finds flowing regions with a macroscopic friction coefficient below the yielding criterion, and volume fraction above the jamming criterion. We demonstrate the underlying physics by incorporating shear rate fluctuations into a recently proposed tensor model for the microstructure and stress, and applying the model to an inhomogeneous flow problem. The model predictions agree qualitatively with particle-based simulations.
