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Main Title: Squirmer rods as elongated microswimmers: flow fields and confinement
Author(s): Zantop, Arne W.
Stark, Holger
Type: Article
Language Code: en
Abstract: Microswimmers or active elements, such as bacteria and active filaments, have an elongated shape, which determines their individual and collective dynamics. There is still a need to identify what role long-range hydrodynamic interactions play in their fascinating dynamic structure formation. We construct rods of different aspect ratios using several spherical squirmer model swimmers. With the help of the mesoscale simulation method of multi-particle collision dynamics we analyze the flow fields of these squirmer rods both in a bulk fluid and in Hele-Shaw geometries of different slab widths. Based on the hydrodynamic multipole expansion either for bulk or confinement between two parallel plates, we categorize the different multipole contributions of neutral as well as pusher-type squirmer rods. We demonstrate how confinement alters the radial decay of the flow fields for a given force or source multipole moment compared to the bulk fluid.
Issue Date: 25-Jun-2020
Date Available: 14-Aug-2020
DDC Class: 530 Physik
Subject(s): microswimmers
spherical squirmer model swimmers
squirmer rod
flow fields
bulk fluid
Sponsor/Funder: DFG, 163436311, SFB 910: Kontrolle selbstorganisierender nichtlinearer Systeme: Theoretische Methoden und Anwendungskonzepte
TU Berlin, Open-Access-Mittel - 2020
Journal Title: Soft Matter
Publisher: Royal Society of Chemistry (RSC)
Publisher Place: Cambridge
Volume: 16
Issue: 27
Publisher DOI: 10.1039/D0SM00616E
Page Start: 6400
Page End: 6412
EISSN: 1744-6848
ISSN: 1744-683X
Appears in Collections:FG Statistische Physik weicher Materie und biologischer Systeme » Publications

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