Single fiber transport in a confined channel: Microfluidic experiments and numerical study
Single fiber transport in a confined channel: Microfluidic experiments and numerical study
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受限通道中的单纤维传输：微流体实验和数值研究
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
A. Lindner
中科院分区：
文献类型：
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作者：
H. Berthet;M. Fermigier;A. Lindner
我们提出了一个实验和数值研究的传输单纤维限制在一个微流体Hele-Shaw几何形状。该纤维具有正方形横截面和典型的10倍纵横比。我们解决的问题的纤维速度，因为它是自由运输的流量，特别是研究其依赖于纤维的方向和限制在通道中，定义为与通道高度的纤维高度的比率。实验和模拟都被设置为使得悬浮在通道高度中间的纤维不与横向流动边界相互作用。在低约束条件下，纤维速度与纤维取向无关，并且当约束趋于零时，纤维速度趋于流体的最大速度。光纤的速度随着约束的增加而减慢。我们发现，当约束达到约0.5时，取向会影响纤维速度：垂直于流动方向的纤维比平行于流动方向的纤维移动得更快。
We present an experimental and numerical study on the transport of a single fiber confined in a microfluidic Hele-Shaw geometry. The fiber has a square cross-section and a typical aspect ratio of ten. We address the question of the fiber velocity as it is freely transported by the flow, and study in particular its dependence on the fiber orientation and confinement in the channel, defined as the ratio of the fiber height with the channel height. Both experiments and simulations are set so that the fiber suspended in the middle of the channel height does not interact with the lateral flow boundaries. At low confinements, the fiber velocity is independent of the fiber orientation with the flow direction and tends to the maximal velocity of the fluid when the confinement tends to zero. The fiber slows down as the confinement increases. We find that as the confinement reaches approximately 0.5, the orientation affects the fiber velocity: a fiber perpendicular to the flow direction moves faster than a parallel...