Experimental measurements of velocity and concentration profiles were carried out to study transport of non‐colloidal suspension in bifurcating micro channels for both diverging and converging flow conditions using a combination of mirco‐particle image velocimetry and particle tracking velocimetry techniques. Migration of particles across the streamline was observed and symmetric velocity and concentration profile in the inlet branch becomes asymmetric in the daughter branches. Further migration of particles toward the center of the channel in the outlet branch make the profiles again symmetric. The evolution of velocity and concentration profiles was observed to be different in the symmetric and asymmetric bifurcation channels. The comparison of the streamlines for the fluid and the particles showed significant deviation near the bifurcation region. This may explain why there is unequal flow and particle partitioning during flow of suspension in asymmetric bifurcating channels as reported in many previous studies. © 2018 American Institute of Chemical Engineers AIChE J, 64: 2293–2307, 2018

中文翻译：

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通过分叉微通道的悬浮液中颗粒迁移的实验研究

进行了速度和浓度分布的实验测量，以结合微粒子图像测速和粒子跟踪测速技术研究分流和收敛流动条件下分叉微通道中非胶体悬浮液的运输。观察到颗粒跨流线迁移，并且入口分支中对称的速度和浓度分布在子分支中变得不对称。粒子进一步向出口分支中通道的中心迁移，使轮廓再次对称。在对称和非对称分叉通道中观察到速度和浓度分布的变化是不同的。流体和颗粒流线的比较显示在分叉区域附近有明显的偏差。正如先前的许多研究报道，这可以解释为什么在不对称分叉通道中的悬浮液流动过程中，流动和颗粒分配不相等。©2018美国化学工程师学会AIChE J，64：2293–2307，2018年