Numerical simulation of the effects of non-Newtonian property of the solvent on particle suspension rheology

IF 1.9 4区工程技术 Q3 ENGINEERING, MECHANICAL

Advances in Mechanical Engineering Pub Date : 2023-09-01 DOI:10.1177/16878132231198338

Naoki Masuyama, Tomohiro Fukui

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Abstract

To investigate the effects of the non-Newtonian properties of solvents on particle suspension rheology (non-Newtonian property and viscosity), we analyzed suspension flows with different solvent characteristics. We used the power-law model to express the non-Newtonian properties of solvents. The power-law index of the suspension was denoted as n sus. and that of the solvent as [Formula: see text] to distinguish between their non-Newtonian properties. Besides, to evaluate the non-Newtonian property of the particle suspension, we estimated its power-law index [Formula: see text] by comparing its particle velocity with the velocity profile of a power-law fluid. As a result, regardless of the different area fraction, the power-law index of the particle suspension was lower than that of the solvent for [Formula: see text], 0.8, and 1.0. On the other hand, for [Formula: see text] and [Formula: see text], the power-law index of the particle suspension was higher than that of the solvent. Regarding the particle position, particles for [Formula: see text] were more concentrated on the wall side than those of the suspensions with [Formula: see text], 0.8, and 1.0. Thus, this study confirms that a change in the non-Newtonian property of a suspension due to interactions between particles and power-law fluids is an essential factor when discussing the rheology of suspensions.

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溶剂非牛顿性质对颗粒悬浮流变性影响的数值模拟

为了研究溶剂的非牛顿性质对颗粒悬浮液流变性的影响(非牛顿性质和粘度)，我们分析了不同溶剂特性下的悬浮液流动。我们用幂律模型来表示溶剂的非牛顿性质。将悬架的幂律指数记为n sus。和溶剂的[公式:见正文]来区分它们的非牛顿性质。此外，为了评估颗粒悬浮液的非牛顿性质，我们通过将其颗粒速度与幂律流体的速度剖面进行比较来估计其幂律指数[公式:见文]。因此，无论面积分数如何，颗粒悬浮液在[公式:见文]、0.8和1.0时的幂律指数均低于溶剂。另一方面，对于[公式:见文]和[公式:见文]，颗粒悬浮液的幂律指数高于溶剂的幂律指数。在颗粒位置上，[公式:见文]的颗粒比[公式:见文]、0.8和1.0的颗粒更集中在壁面。因此，这项研究证实，在讨论悬浮液的流变性时，由于粒子和幂律流体之间的相互作用而导致的悬浮液的非牛顿性质的变化是一个必不可少的因素。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advances in Mechanical Engineering 工程技术-机械工程

CiteScore

3.60

自引率

4.80%

发文量

353

审稿时长

6-12 weeks

期刊介绍： Advances in Mechanical Engineering (AIME) is a JCR Ranked, peer-reviewed, open access journal which publishes a wide range of original research and review articles. The journal Editorial Board welcomes manuscripts in both fundamental and applied research areas, and encourages submissions which contribute novel and innovative insights to the field of mechanical engineering