Thixotropy in yield stress fluids as a limit of viscoelasticity

Thixotropy in yield stress fluids as a limit of viscoelasticity
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屈服应力流体中的触变性作为粘弹性的极限

DOI:
10.1093/imamat/hxw031
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发表时间:
2016
影响因子:
1.2
通讯作者:
Renardy, Yuriko
Renardy, Yuriko
中科院分区:
数学4区
文献类型:
--
作者:
Renardy, Michael;Renardy, Yuriko

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触变屈服应力流体的屈服应力和粘度随着流体经历结构变化而随时间缓慢变化。本文回顾了最近的工作,该工作表明当弛豫时间变大时,这种行为如何作为粘弹性流的极限而出现。大弛豫时间引入了一个小参数,可以用作奇异扰动研究的基础。将使用粘弹性模型的简单原型来说明分析。我们回顾了剪切流、振荡剪切流和拉伸流启动时的行为,并确定了未来研究的潜在方向。
Thixotropic yield stress fluids have a yield stress and viscosity which change slowly over time as the fluid undergoes structural changes. This article reviews recent work which shows how such behaviour can arise as a limit of viscoelastic flow when a relaxation time becomes large. The large relaxation time introduces a small parameter which can be used as a basis for singular perturbation studies. A simple prototype for a viscoelastic model will be used to illustrate the analysis. We review the behaviour in startup of shear flow, oscillatory shear flow and elongational flow and identify potential directions for future research.
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