Nature’s Microfluidic Transporter: Rotational Cytoplasmic Streaming at High Péclet Numbers

作     者：Jan-Willem van de Meent Idan Tuval Raymond E. Goldstein 

作者机构：Department of Applied Mathematics and Theoretical Physics Centre for Mathematical Sciences University of Cambridge Wilberforce Road Cambridge CB3 0WA United Kingdom Cambridge Computational Biology Institute Centre for Mathematical Sciences University of Cambridge Wilberforce Road Cambridge CB3 0WA United Kingdom 

出 版 物：《Physical Review Letters》 (Phys Rev Lett)

年 卷 期：2008年第101卷第17期

页      面：178102-178102页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：EPSRC University of Leiden Human Frontier Science Program DOE [DE-AC02-06CH11357] Leverhulme Trust Schlumberger Chair Fund 

主　　题：Reynolds number 

摘      要：Cytoplasmic streaming circulates the contents of large eukaryotic cells, often with complex flow geometries. A largely unanswered question is the significance of these flows for molecular transport and mixing. Motivated by “rotational streaming in Characean algae, we solve the advection-diffusion dynamics of flow in a cylinder with bidirectional helical forcing at the wall. A circulatory flow transverse to the cylinder’s long axis, akin to Dean vortices at finite Reynolds numbers, arises from the chiral geometry. Strongly enhanced lateral transport and longitudinal homogenization occur if the transverse Péclet number is sufficiently large, with scaling laws arising from boundary layers.