Dynamics of Active Filaments in Porous Media

Physical Review Letters
Zahra Mokhtari, Annette Zippelius

Abstract

The motion of active polymers in a two-dimensional porous medium is shown to depend critically on flexibility, activity, and degree of polymerization. For a given Péclet number, we observe a transition from localization to diffusion as the stiffness of the chains is increased. Whereas stiff chains move almost unhindered through the porous medium, flexible ones spiral and get stuck. Their motion can be accounted for by the model of a continuous time random walk with a renewal process corresponding to unspiraling. The waiting time distribution is shown to develop heavy tails for decreasing stiffness, resulting in subdiffusive and ultimately caged behavior.

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Citations

Nov 22, 2019·Soft Matter·Tapomoy Bhattacharjee, Sujit S Datta
May 23, 2020·Physical Review Letters·A DeblaisD Bonn
Aug 22, 2020·Soft Matter·Ligesh TheeyancheriRajarshi Chakrabarti
Jun 6, 2020·Physical Review Letters·A DeblaisS Woutersen
Sep 23, 2020·Soft Matter·Jeffrey M MooreMeredith D Betterton
Oct 10, 2020·Physical Review Letters·Suvendu MandalHartmut Löwen
Nov 5, 2021·Soft Matter·Bingjie ZhangNanrong Zhao
Dec 8, 2021·Nature Communications·Christina KurzthalerHoward A Stone

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