TY  - JOUR
AU  - Mousavi, Mahdiyeh
AU  - Gompper, Gerhard
AU  - Winkler, Roland G.
TI  - Wall entrapment of peritrichous bacteria: a mesoscale hydrodynamics simulation study
JO  - Soft matter
VL  - 16
IS  - 20
SN  - 1744-6848
CY  - London
PB  - Royal Soc. of Chemistry
M1  - FZJ-2020-02118
SP  - 4866 - 4875
PY  - 2020
AB  - Microswimmers such as E. coli bacteria accumulate and exhibit an intriguing dynamics near walls, governed by hydrodynamic and steric interactions. Insight into the underlying mechanisms and predominant interactions demand a detailed characterization of the entrapment process. We employ a mesoscale hydrodynamics simulation approach to study entrapment of an E. coli-type cell at a no-slip wall. The cell is modeled by a spherocylindrical body with several explicit helical flagella. Three stages of the entrapment process can be distinguished: the approaching regime, where a cell swims toward a wall on a nearly straight trajectory; a scattering regime, where the cell touches the wall and reorients; and a surface-swimming regime. Our simulations show that steric interactions may dominate the entrapment process, yet, hydrodynamic interactions slow down the adsorption dynamics close to the boundary and imply a circular motion on the wall. The locomotion of the cell is characterized by a strong wobbling dynamics, with cells preferentially pointing toward the wall during surface swimming.
LB  - PUB:(DE-HGF)16
C6  - pmid:32424390
UR  - <Go to ISI:>//WOS:000537135300013
DO  - DOI:10.1039/D0SM00571A
UR  - https://juser.fz-juelich.de/record/877302
ER  -