Kantsler Vasiliy, Steinberg Victor
Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot, 76100 Israel.
Phys Rev Lett. 2006 Jan 27;96(3):036001. doi: 10.1103/PhysRevLett.96.036001. Epub 2006 Jan 24.
Experimental results on the tank-treading-tumbling transition in the dynamics of a vesicle subjected to a shear flow as a function of a vesicle excess area, viscosity contrast, and the normalized shear rate are presented. Good agreement on the transition curve and scaling behavior with theory and numerical simulations was found. A new type of unsteady motion at a large degree of vesicle deformability was discovered and described as follows: a vesicle trembles around the flow direction, while the vesicle shape strongly oscillates.
本文给出了囊泡在剪切流作用下，其动力学中坦克履带式翻滚转变的实验结果，该转变是囊泡过剩面积、粘度对比和归一化剪切率的函数。研究发现，转变曲线和标度行为与理论及数值模拟结果吻合良好。还发现并描述了一种在囊泡高度可变形情况下的新型非定常运动：囊泡围绕流动方向颤抖，同时囊泡形状强烈振荡。
