耦合滑移和触变性来模拟高岭石悬浮液的瞬态流变行为

IF 2.3 3区 工程技术 Q2 MECHANICS
Jourdain H. Piette, Xiaohan Jia, Savvas G. Hatzikiriakos
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引用次数: 0

摘要

研究了半稀释高岭石粘土悬浮液的瞬态流变行为。具体来说,我们使用流动曲线滞后和阶跃剪切速率试验来研究高岭石悬浮液的剪切行为。我们发现,触变性和滑移之间的耦合效应主导了这种瞬态流变行为。体系中类似固体的滑移的发生似乎是壁面粗糙度和悬浮液颗粒与壁面之间界面现象的函数。通过使用砂纸、改变间隙和使用不同的几何形状,对滑移和触变性的耦合现象进行了研究。为了说明滑移在该系统中的重要性,我们提出了触变和滑移耦合(CTS)模型,该模型将触变结构参数模型(SPM)与现有的滑移模型耦合在一起。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Coupling slip and thixotropy to model the transient rheological behaviour of kaolinite suspensions

Coupling slip and thixotropy to model the transient rheological behaviour of kaolinite suspensions

Coupling slip and thixotropy to model the transient rheological behaviour of kaolinite suspensions

The transient rheological behaviour of semi-dilute kaolinite clay suspensions is investigated. Specifically, the flow curve hysteresis and step shear rate tests are used to investigate the shear behaviour of kaolinite suspensions. We found that there is a coupling effect between thixotropy and slip that dominates this transient rheological behaviour. It appears that the onset of solid-like slip in the system is a function of wall roughness and interfacial phenomena between the particles of the suspension and the wall. The coupled phenomena of slip and thixotropy are investigated using the application of sandpaper, varying the gap, and using different geometries. To illustrate the importance of slip in this system, we propose a Coupled Thixotropy and Slip (CTS) model that couples a thixotropic Structure Parameter Model (SPM) to an existing slip model.

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来源期刊
Rheologica Acta
Rheologica Acta 物理-力学
CiteScore
4.60
自引率
8.70%
发文量
55
审稿时长
3 months
期刊介绍: "Rheologica Acta is the official journal of The European Society of Rheology. The aim of the journal is to advance the science of rheology, by publishing high quality peer reviewed articles, invited reviews and peer reviewed short communications. The Scope of Rheologica Acta includes: - Advances in rheometrical and rheo-physical techniques, rheo-optics, microrheology - Rheology of soft matter systems, including polymer melts and solutions, colloidal dispersions, cement, ceramics, glasses, gels, emulsions, surfactant systems, liquid crystals, biomaterials and food. - Rheology of Solids, chemo-rheology - Electro and magnetorheology - Theory of rheology - Non-Newtonian fluid mechanics, complex fluids in microfluidic devices and flow instabilities - Interfacial rheology Rheologica Acta aims to publish papers which represent a substantial advance in the field, mere data reports or incremental work will not be considered. Priority will be given to papers that are methodological in nature and are beneficial to a wide range of material classes. It should also be noted that the list of topics given above is meant to be representative, not exhaustive. The editors welcome feedback on the journal and suggestions for reviews and comments."
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