论文标题
密集纤维悬浮液的流变学：屈服应力，剪切变薄和正常应力差异的起源
Rheology of dense fiber suspensions: Origin of yield stress, shear thinning and normal stress differences
论文作者
论文摘要
我们解释了刚性纤维悬浮液中屈服应力，剪切和正常应力差异的起源。我们研究了流体动力学，胶体吸引力和排斥性和纤维间接触相互作用之间的相互作用。从计算模型获得的剪切粘性粘度和有限的屈服应力与文献的体验结果符合定量一致。在这项研究中，我们表明有吸引力的相互作用会导致刚性纤维悬浮液中的屈服应力和剪切的流变学。鉴于关于纤维悬浮液的屈服应力起源的持续讨论，这是一个重要的发现。所提出的模型定量预测流变学的能力不仅限于剪切变薄和屈服应力，还可以扩展到正常应力。
We explain the origins of yield stress, shear-thinning, and normal stress differences in rigid fiber suspensions. We investigate the interplay between the hydrodynamic, colloidal attractive and repulsive, and inter-fiber contact interactions. The shear-thinning viscosity and finite yield stress obtained from the computational model are in quantitative agreement with experiential results from the literature. In this study, we show that attractive interactions result in yield stress and shear-thinning rheology in the suspensions of rigid fibers. This is an important finding, given the ongoing discussion regarding the origin of the yield stress for suspensions of fibers. The ability of the proposed model to quantitatively predict the rheology is not limited to only shear thinning and yield stress but also extends to normal stresses.
