transport processes

transport of passive and active matter in complex fluidic environments

Locomotion of self-propelled particles such as motile bacteria or phoretic swimmers often takes place in the presence of applied flows and confining boundaries. Interactions of these active swimmers with the flow environment and the boundaries are important for the understanding of many biological processes, including infection by motile bacteria, the formation of biofilms, and the design of micro and nanomotors for biomedical applications.

The transport behavior of active matter results from the interplay of a multitude of factors including swimming, confinement, and hydrodynamics. Because the transport of biological active matter often occurs in complex domains, our current work focuses on geometries including turtuous domains, fluctuating channels, and random porous media.

Transport of active particles in Poiseuille flow (left), in a periodic channel (center), and in a time-fluctuating channel (right).



  1. AI-aided geometric design of anti-infection catheters
    Tingtao Zhou, Xuan Wan, Daniel Zhengyu Huang, and 6 more authors
    Science Advances, Jan 2024


  1. Activity-induced propulsion of a vesicle
    Zhiwei Peng, Tingtao Zhou, and John F. Brady
    Journal of Fluid Mechanics, May 2022


  1. Upstream swimming and Taylor dispersion of active Brownian particles
    Zhiwei Peng, and John F. Brady
    Physical Review Fluids, Jul 2020