This title appears in the Scientific Report :
2015
Please use the identifier:
http://dx.doi.org/10.1039/C5SM01678A in citations.
Please use the identifier: http://hdl.handle.net/2128/22841 in citations.
Modelling the mechanics and hydrodynamics of swimming E. coli
Modelling the mechanics and hydrodynamics of swimming E. coli
The swimming properties of an E. coli-type model bacterium are investigated by mesoscale hydrodynamic simulations, combining molecular dynamics simulations of the bacterium with the multiparticle particle collision dynamics method for the embedding fluid. The bacterium is composed of a spherocylindr...
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Personal Name(s): | Hu, Jinglei |
---|---|
Yang, Mingcheng / Gompper, Gerhard (Corresponding author) / Winkler, Roland G. | |
Contributing Institute: |
Theorie der Weichen Materie und Biophysik; IAS-2 Theorie der Weichen Materie und Biophysik; ICS-2 |
Published in: | Soft matter, 11 (2015) 40, S. 7867 - 7876 |
Imprint: |
London
Royal Soc. of Chemistry
2015
|
PubMed ID: |
26256240 |
DOI: |
10.1039/C5SM01678A |
Document Type: |
Journal Article |
Research Program: |
Physical Basis of Diseases |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/22841 in citations.
The swimming properties of an E. coli-type model bacterium are investigated by mesoscale hydrodynamic simulations, combining molecular dynamics simulations of the bacterium with the multiparticle particle collision dynamics method for the embedding fluid. The bacterium is composed of a spherocylindrical body with attached helical flagella, built up from discrete particles for an efficient coupling with the fluid. We measure the hydrodynamic friction coefficients of the bacterium and find quantitative agreement with experimental results of swimming E. coli. The flow field of the bacterium shows a force-dipole-like pattern in the swimming plane and two vortices perpendicular to its swimming direction arising from counterrotation of the cell body and the flagella. By comparison with the flow field of a force dipole and rotlet dipole, we extract the force-dipole and rotlet-dipole strengths for the bacterium and find that counterrotation of the cell body and the flagella is essential for describing the near-field hydrodynamics of the bacterium. |