Granek Rony, Diamant Haim
The Stella and Avram Goren-Goldstein Department of Biotechnology Engineering, Ben-Gurion University of The Negev, 84105, Beer Sheva, Israel.
Raymond & Beverly Sackler School of Chemistry, Tel Aviv University, 69978, Tel Aviv, Israel.
Eur Phys J E Soft Matter. 2018 Jan 5;41(1):1. doi: 10.1140/epje/i2018-11607-x.
The dynamics of membrane undulations inside a viscous solvent is governed by distinctive, anomalous, power laws. Inside a viscoelastic continuous medium these universal behaviors are modified by the specific bulk viscoelastic spectrum. Yet, in structured fluids the continuum limit is reached only beyond a characteristic correlation length. We study the crossover to this asymptotic bulk dynamics. The analysis relies on a recent generalization of the hydrodynamic interaction in structured fluids, which shows a slow spatial decay of the interaction toward the bulk limit. For membranes which are weakly coupled to the structured medium we find a wide crossover regime characterized by different, universal, dynamic power laws. We discuss various systems for which this behavior is relevant, and delineate the time regime over which it may be observed.
粘性溶剂中膜波动的动力学受独特的、反常的幂律支配。在粘弹性连续介质中，这些普遍行为会因特定的体粘弹谱而改变。然而，在结构化流体中，只有超过特征关联长度才会达到连续极限。我们研究向这种渐近体动力学的转变。该分析依赖于最近对结构化流体中流体动力学相互作用的推广，这表明相互作用向体极限的空间衰减缓慢。对于与结构化介质弱耦合的膜，我们发现了一个广泛的转变区域，其特征是不同的、普遍的动态幂律。我们讨论了这种行为相关的各种系统，并描述了可能观察到这种行为的时间范围。
