Excess Diffusion of a Driven Colloidal Particle in a Convection Array  

作　　者：Qingqing Yin Yunyun Li Fabio Marchesoni Debajyoti Debnath Pulak KGhosh 尹庆庆;李云云;Fabio Marchesoni;Debajyoti Debnath;Pulak KGhosh(Center for Phononics and Thermal Energy Science,Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology,School of Physics Science and Engineering,Tongji University,Shanghai 200092,China;Dipartimento di Fisica,Universitàdi Camerino,I-62032 Camerino,Italy;Department of Chemistry,Presidency University,Kolkata,India)

机构地区：[1]Center for Phononics and Thermal Energy Science,Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology,School of Physics Science and Engineering,Tongji University,Shanghai 200092,China [2]Dipartimento di Fisica,Universitàdi Camerino,I-62032 Camerino,Italy [3]Department of Chemistry,Presidency University,Kolkata,India

出　　处：《Chinese Physics Letters》2021年第4期17-21,共5页中国物理快报（英文版）

基　　金：the National Natural Science Foundation of China(Grant Nos.11875201 and 11935010);supported by SERB Start-up Research Grant(Young Scientist)(Grant No.YSS/2014/000853);the UGC-BSR Start-up(Grant No.F.30-92/2015)。

摘　　要：We numerically investigate the transport of a passive colloidal particle in a periodic array of planar counterrotating convection rolls,at high Peclet numbers.It is shown that an external bias,oriented parallel to the array,produces a huge excess diffusion peak,in cases where bias and advection drag become comparable.This effect is not restricted to one-dimensional convection geometries,and occurs independently of the array’s boundary conditions.

关 键 词：conditions. ROTATING DIFFUSION 

分 类 号：O552[理学—热学与物质分子运动论]