Fully developed and transient concentration profiles of particulate suspensions sheared in a cylindrical Couette cell

Fully developed and transient concentration profiles of particulate suspensions sheared in a cylindrical Couette cell
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在圆柱形库埃特池中剪切的颗粒悬浮液的完全开发和瞬时浓度分布

DOI:
10.1017/jfm.2018.982
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发表时间:
2019
影响因子:
3.7
通讯作者:
Hormozi, Sarah
Hormozi, Sarah
中科院分区:
工程技术2区
文献类型:
--
作者:
Sarabian, Mohammad;Firouznia, Mohammadhossein;Metzger, Bloen;Hormozi, Sarah

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我们实验研究了在Taylor-Couette结构剪切和雷诺数消失极限下的非布朗悬浮中的粒子迁移。采用高分辨率指数匹配技术测量局部颗粒体积分数。在这种宽间隙Taylor-Couette构型中,我们发现,对于大范围的体积分数,,充分发育的浓度分布可以用Nott & Brady (J.流体力学)的悬浮平衡模型很好地预测。,第275卷,1994,第157-199页)。此外,我们提供了迁移应变尺度和迁移幅度的系统测量,这突出了悬浮平衡模型预测的局限性。
We experimentally investigate particle migration in a non-Brownian suspension sheared in a Taylor–Couette configuration and in the limit of vanishing Reynolds number. Highly resolved index-matching techniques are used to measure the local particulate volume fraction. In this wide-gap Taylor–Couette configuration, we find that for a large range of bulk volume fraction, , the fully developed concentration profiles are well predicted by the suspension balance model of Nott & Brady (J. Fluid Mech., vol. 275, 1994, pp. 157–199). Moreover, we provide systematic measurements of the migration strain scale and of the migration amplitude which highlight the limits of the suspension balance model predictions.
压力驱动的悬浮液流动接近堵塞。
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