Viscoelastic instability in an asymmetric geometry

Viscoelastic instability in an asymmetric geometry
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非对称几何结构中的粘弹性不稳定性

DOI:
10.1140/epjs/s11734-022-00657-9
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发表时间:
2022
期刊:
The European Physical Journal Special Topics
影响因子:
--
通讯作者:
Ardekani, Arezoo M.
Ardekani, Arezoo M.
中科院分区:
--
文献类型:
--
作者:
Kumar, Manish;Ardekani, Arezoo M.

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通过多孔介质的粘弹性流动在诸如提高石油采收率(EOR)、微生物开采和地下水修复的工业应用中是重要的。它也与生物过程有关,例如药物递送、感染性生物膜形成以及呼吸和受精期间的运输。多孔介质是高度无序的,粘弹性不稳定性引起的孔隙尺度的流动状态调节着多孔介质中的输运。在本研究中,我们系统地探讨了孔隙尺度粘弹性不稳定性的几何不对称性的影响。在本研究中使用的不对称的几何形状包括两个气缸内的通道,其中前气缸位于通道的中心线上,后气缸位于偏离中心的通道。几何不对称性促进了两个圆柱体周围的不对称流动。涡流也出现在中间韦森伯格数,其中韦森伯格数表征粘弹性流动中的弹性和粘性力的相对重要性的气缸之间的区域。我们进一步探讨了几何不对称性的强度和流体流变特性对流动不对称性和涡流形成的影响。
Viscoelastic flow through porous media is important in industrial applications such as enhanced oil recovery (EOR), microbial mining, and groundwater remediation. It is also relevant in biological processes such as drug delivery, infectious biofilm formation, and transport during respiration and fertilization. The porous medium is highly disordered and viscoelastic instability-induced flow states at the pore-scale regulate the transport in porous media. In the present study, we systematically explore the effect of geometrical asymmetry on pore-scale viscoelastic instability. The asymmetric geometry used in the present study consists of two cylinders confined inside a channel, where the front cylinder is located on the centerline of the channel and the rear cylinder is situated off-center of the channel. The geometrical asymmetry facilitates asymmetric flow around both cylinders. An eddy also appears in the region between the cylinders at intermediate Weissenberg numbers, where the Weissenberg number characterizes the relative importance of elastic and viscous forces in viscoelastic flows. We further explore the effect of the strength of geometrical asymmetry and fluid rheological properties on flow asymmetry and eddy formation.
DOI: 10.1063/5.0008783
发表时间: 2020-05
期刊: Physics of Fluids
影响因子: 4.6
作者:
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通讯作者: S. Varchanis;Cameron C. Hopkins;A. Shen;J. Tsamopoulos;S. Haward
微流体圆柱体周围的粘弹性流动和不稳定性
DOI: --
发表时间: 2019
期刊:
影响因子: --
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DOI: 10.1021/nn402753y
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期刊: ACS NANO
影响因子: 17.1
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DOI: 10.1103/physrevfluids.6.033304
发表时间: 2021-03-25
影响因子: 2.7
作者:
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两个障碍物之间蠕动流中的弹性尾流不稳定性
DOI: --
发表时间: 2017
期刊:
影响因子: --
作者:
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通讯作者: V. Steinberg