Wrinkling of vesicles during transient dynamics in elongational flow.
Wrinkling of vesicles during transient dynamics in elongational flow.
复制标题
拉伸流瞬态动力学过程中囊泡的起皱。
DOI：
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发表时间：
2007
影响因子：
8.6
通讯作者：
S. Vergeles
中科院分区：
文献类型：
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作者：
Konstantin Turitsyn;S. Vergeles
Kantsler等人最近的实验[Phys. Rev. Lett. 99，178102（2007）10.1103/PhysRevLett.99.178102]已经表明，囊泡在外部伸长流动中的松弛动力学伴随着膜上褶皱的形成。受这些实验的启发，我们提出了一个理论描述的动态褶皱膜。褶皱的形成与膜的负表面张力引起的动力学不稳定性有关。对于准球形囊泡，我们进行分析研究的褶皱结构动力学。我们推导出不稳定阈值的表达式，并确定三个阶段的动态。的标度律的时间演化的反射波长和表面张力的建立，数值证实，并与实验结果进行比较。
Recent experiments by Kantsler et al. [Phys. Rev. Lett. 99, 178102 (2007)10.1103/PhysRevLett.99.178102] have shown that the relaxational dynamics of a vesicle in external elongation flow is accompanied by the formation of wrinkles on a membrane. Motivated by these experiments we present a theory describing the dynamics of a wrinkled membrane. The formation of wrinkles is related to the dynamical instability induced by negative surface tension of the membrane. For quasispherical vesicles we perform analytical study of the wrinkle structure dynamics. We derive the expression for the instability threshold and identify three stages of the dynamics. The scaling laws for the temporal evolution of wrinkling wavelength and surface tension are established, confirmed numerically, and compared to experimental results.