Interaction network analysis in shear thickening suspensions
Interaction network analysis in shear thickening suspensions
复制标题
剪切增稠悬浮液中的相互作用网络分析
DOI：
10.1103/physrevfluids.5.034307
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发表时间：
2020
影响因子：
2.7
通讯作者：
Morris, Jeffrey F.
中科院分区：
文献类型：
--
作者：
Gameiro, Marcio;Singh, Abhinendra;Kondic, Lou;Mischaikow, Konstantin;Morris, Jeffrey F.
当固体填充分数增加到临界体积分数以上时，粘性液体中的致密摩擦颗粒悬浮液经历越来越强的连续剪切增稠，并且对于甚至更高的填充分数观察到不连续剪切增稠。最近的研究已经将剪切增稠与随着应力的增加从主要润滑接触到主要摩擦接触的转变相关联，其中该转变通过克服排斥力来确定。研究了剪切增稠悬浮液的流变学和摩擦力网络。这些分析使用网络的拓扑结构的措施，包括持久同源性的工具。我们观察到，在低应力下，摩擦相互作用网络主要是准线性沿着压缩轴。随着应力的增加，力网络变得更加各向同性，除了链状结构之外还形成环。Betti数和总持久性的拓扑测度提供了一种描述摩擦力网络平均性质的紧凑方法，并提供了宏观流变学和微观相互作用之间的联系。一个总的持久性措施描述的意义的循环的力网络结构，作为一个函数的应力和包装分数，表现出类似于相对粘度的行为，并显示附近的堵塞分数的比例律为二维和三维系统考虑。两个维度的总持久性措施被发现是非常相似的。
Dense frictional particulate suspensions in a viscous liquid undergo increasingly strong continuous shear thickening as the solid packing fraction,, increases above a critical volume fraction, and discontinuous shear thickening is observed for even higher packing fractions. Recent studies have related shear thickening to a transition from mostly lubricated to predominantly frictional contacts with the increase in stress, with the transition determined by overcoming a repulsive force. The rheology and networks of frictional forces from two- and three-dimensional simulations of shear-thickening suspensions are studied. These are analyzed using measures of the topology of the network, including tools of persistent homology. We observe that at low stress, the frictional interaction networks are predominantly quasilinear along the compression axis. With an increase in stress, the force networks become more isotropic, forming loops in addition to chainlike structures. The topological measures of Betti numbers and total persistence provide a compact means of describing the mean properties of the frictional force networks, and provide a link between macroscopic rheology and the microscopic interactions. A total persistence measure describing the significance of loops in the force network structure, as a function of stress and packing fraction, shows behavior similar to that of relative viscosity, and displays a scaling law near the jamming fraction for both two- and three-dimensional systems considered. The total persistence measures for both dimensions are found to be very similar.
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致密悬浮液中摩擦流变学的微观起源：力空间中的相关性。
影响因子：
8.6
作者：
Jetin E. Thomas;K. Ramola;Abhinendra Singh;R. Mari;J. Morris;B. Chakraborty
通讯作者：
B. Chakraborty
DOI：
--
发表时间：
2017
期刊：
影响因子：
--
作者：
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通讯作者：
M. Trulsson
影响因子：
2.4
作者：
Ryohei Seto;Abhinendra Singh;B. Chakraborty;M. Denn;J. Morris
通讯作者：
Ryohei Seto;Abhinendra Singh;B. Chakraborty;M. Denn;J. Morris
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DOI：
--
发表时间：
2009
期刊：
影响因子：
--
作者：
I. Bashkirtseva;A. Zubarev;L. Iskakova;L. Ryashko
通讯作者：
L. Ryashko
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影响因子：
2.4
作者：
L. Kondic;M. Kramár;L. Pugnaloni;C. M. Carlevaro;K. Mischaikow
通讯作者：
K. Mischaikow