加强非牛顿流体建模:横流曲线模型的新扩展

IF 2.4 3区 环境科学与生态学 Q2 ENGINEERING, CIVIL Journal of Hydro-environment Research Pub Date : 2024-08-18 DOI:10.1016/j.jher.2024.08.001
Keivan Kaveh , Andreas Malcherek
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引用次数: 0

摘要

许多粘度和流动曲线模型可用于对流体的非牛顿行为进行数值研究。虽然粒度、粒度分布和浓度在决定悬浮液和胶体系统的粘度和流动行为方面起着至关重要的作用,但几乎所有模型都忽略或间接考虑了它们。我们对广泛使用的 Cross 流动曲线模型进行了数学扩展,以考虑浓度和粒度对粘度和流动曲线建模的影响。特别是,这项研究考虑到了单位体积内可变的单个颗粒总数,而在其他模型中,这一总数被假定为常数。拟议的扩展使流动曲线能够模拟典型的剪切稀化悬浮液,但也可以是牛顿型悬浮液,或在不同剪切速率和浓度下的剪切增稠型悬浮液。这些考虑因素为研究和设计悬浮液、胶体系统和其他复杂的流固相互作用提供了启示。
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Enhancing non-newtonian fluid modeling: A novel extension of the cross flow curve model

A number of viscosity and flow curve models can be used to numerically investigate the non-Newtonian behavior of fluids. Although particle size, grain size distribution and concentration play a crucial role in determining the viscosity and flow behavior of suspensions and colloidal systems, they are either ignored or considered indirectly in almost all models. We present a mathematical extension of the widely used Cross flow curve model to account for the effect of concentration and particle size in modeling viscosity and flow curves. In particular, this study takes into account a variable total number of individual particles in unit volume, which is assumed to be constant in other models. The proposed extension allows the flow curve to model suspensions that are typically shear-thinning but can also be Newtonian, or shear-thickening for at different shear rates and concentrations. These considerations provide insight into studying and designing suspensions, colloidal systems, and other complex fluid–solid interactions.

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来源期刊
Journal of Hydro-environment Research
Journal of Hydro-environment Research ENGINEERING, CIVIL-ENVIRONMENTAL SCIENCES
CiteScore
5.80
自引率
0.00%
发文量
34
审稿时长
98 days
期刊介绍: The journal aims to provide an international platform for the dissemination of research and engineering applications related to water and hydraulic problems in the Asia-Pacific region. The journal provides a wide distribution at affordable subscription rate, as well as a rapid reviewing and publication time. The journal particularly encourages papers from young researchers. Papers that require extensive language editing, qualify for editorial assistance with American Journal Experts, a Language Editing Company that Elsevier recommends. Authors submitting to this journal are entitled to a 10% discount.
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