Advances in the Rheological Characterization of Slurries of Elongated Particles

IF 2.6 4区 材料科学 Q3 ENGINEERING, CHEMICAL
Saif Shaikh, Scott Strednak, Jason E. Butler
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引用次数: 2

Abstract

Inherent challenges regarding the rheological characterization of slurries of elongated particles have necessitated the development of alternatives to standardized rheometers. These methods of measurement, and the associated advances in the quantification of shear and normal stress measurements, are described. Also, recent advances in modeling and predictive capabilities are summarized. During shearing flows, confinement substantially influences the orientation distribution of the particles; this change in the microstructure impacts the rheology, even as the smallest confining dimension exceeds seven particle lengths. The slow development of the orientation distributions renders additional difficulties in evaluating the rheology. Achievements of the measurement methods include a universal shear viscosity as a function of concentration for a wide range of particle lengths to diameters (aspect ratios). The jamming limit (divergence of the viscosity with concentration) of the suspensions has been also shown to scale differently than for spheres. More general dynamics of the suspensions and the additional needs for measurement improvements are discussed.
细长颗粒浆料流变特性研究进展
关于细长颗粒浆料流变特性的固有挑战,需要开发标准化流变仪的替代品。描述了这些测量方法,以及在剪应力和正应力测量的量化方面的相关进展。此外,还总结了建模和预测能力方面的最新进展。在剪切流动过程中,约束极大地影响了颗粒的取向分布;这种微观结构的变化会影响流变性,即使最小的围合尺寸超过7个颗粒长度。取向分布的缓慢发展给评价流变学带来了额外的困难。测量方法的成就包括一个普遍的剪切粘度,作为一个广泛的颗粒长度到直径(长径比)的浓度函数。悬浮液的干扰极限(粘度随浓度的发散)也显示出与球体不同的尺度。讨论了悬架更一般的动力学和测量改进的额外需求。
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来源期刊
KONA Powder and Particle Journal
KONA Powder and Particle Journal 工程技术-材料科学:综合
CiteScore
8.40
自引率
4.90%
发文量
35
审稿时长
>12 weeks
期刊介绍: KONA publishes papers in the broad field of powder science and technology, ranging from fundamental principles to practical applications. Papers describing technological experience and critical reviews of existing knowledge in special areas are also welcome.
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