English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Swimming microbes, such as bacteria and algae, live in diverse habitatsincluding soil, ocean and human body which are characterized by structuralboundaries and heterogeneous fluid flows. Although much progress has been madein understanding the Brownian ratchet motions of microbes and theirhydrodynamic interactions with the wall over the last decades, the complexinterplay between the structural and fluidic environment and theself-propelling microbial motions still remains elusive. Here, we developed aLangevin model to simulate and investigate the transport and dispersion ofmicrobes in periodic pillar arrays. By tracing the spatial-temporal evolutionof microbial trajectories, we show that the no-slip pillar surface induceslocal fluid shear which redirects microbial movements. In the vicinity ofpillars, looping trajectories and slowly moving speed lead to the transientaccumulation and the sluggish transport of microbes. Comprehensive microscopicmotions including the swinging, zigzag and adhesive motions are observed. Inthe pillar array of asymmetric pillar arrangements, the adjacent downstreampillars provide geometric guidance such that the microbial population has adeterministic shift perpendicular to the flow direction. Moreover, effects ofthe topology of the pillar array, fluid flowing properties and microbialproperties on the microbial advection and dispersion in pillar arrays arequantitatively analyzed. These results highlight the importance of structuresand flows on the microbial transport and distribution which should be carefullyconsidered in the study of microbial processes.

Microbial transport and dispersion in heterogeneous flows created by pillar arrays