Three-dimensional vesicles under shear flow: numerical study of dynamics and phase diagram.
Three-dimensional vesicles under shear flow: numerical study of dynamics and phase diagram.
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DOI：
10.1103/physreve.83.031921
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发表时间：
2011-03
期刊：
影响因子：
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通讯作者：
T. Biben;A. Farutin;C. Misbah
中科院分区：
文献类型：
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作者：
T. Biben;A. Farutin;C. Misbah
在流动下的囊泡，红细胞（RBC）的模型系统的研究，是理解红细胞在体内和体外表现出的各种复杂的动力学的一个重要步骤。流动下的囊泡的定量三维分析。确定了产生翻滚（TB）、坦克处理、摇摆呼吸（VB）甚至皮划艇（或旋转）模式的参数区域。发现了新的定性特征：（i）随着剪切速率γ的增加，参数空间中VB模式区域显著加宽;（ii）TB和VB的归一化周期随γ的变化具有鲁棒性。还提供分析支持。我们与现有的实验结果进行了比较。特别是，我们发现，相图的各种动力学依赖于三个无量纲的控制参数，而最近的实验工作报道，只有两个是足够的。
The study of vesicles under flow, a model system for red blood cells (RBCs), is an essential step in understanding various intricate dynamics exhibited by RBCs in vivo and in vitro. Quantitative three-dimensional analyses of vesicles under flow are presented. The regions of parameters to produce tumbling (TB), tank-treating, vacillating-breathing (VB), and even kayaking (or spinning) modes are determined. New qualitative features are found: (i) a significant widening of the VB mode region in parameter space upon increasing shear rate γ and (ii) a robustness of normalized period of TB and VB with γ. Analytical support is also provided. We make a comparison with existing experimental results. In particular, we find that the phase diagram of the various dynamics depends on three dimensionless control parameters, while a recent experimental work reported that only two are sufficient.