000014646 001__ 14646
000014646 005__ 20161115100157.0
000014646 04107 $$aeng
000014646 046__ $$k2016-08-21
000014646 100__ $$aArdekani, Arezoo
000014646 24500 $$aCollective motion of microorganisms in complex fluids (INVITED)

000014646 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000014646 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000014646 506__ $$arestricted
000014646 520__ $$2eng$$aSuspensions of microorganisms are characterized by large scale correlated flow structures, enhanced diffusion of passive tracers, and enhanced fluid mixing. Most previous studies on the collective motion of microorganisms have been limited to Newtonian fluids. The nonNewtonian fluid properties, such as viscoelasticity and shear-dependent viscosity in biological flows, such as saliva, mucus and biofilm, significantly affect the swimming dynamics of a single swimmer. However, the role of fluid rheology on the collective motion of microorganisms is poorly understood. In this work, we use direct numerical simulations to investigate the effects of fluid properties on the collective motion of rod-like microswimmers in a low Reynolds number regime. For both pushers and pullers, we find that the viscoelasticity does not qualitatively alter the collective motion of microorganisms. The average speed and spatial correlations in a suspension of pushers decrease with Deborah number, but they are less affected for pullers.

000014646 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000014646 653__ $$a

000014646 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000014646 720__ $$aArdekani, Arezoo
000014646 8560_ $$ffischerc@itam.cas.cz
000014646 8564_ $$s210360$$uhttps://invenio.itam.cas.cz/record/14646/files/TS.FM10-3.01.pdf$$yOriginal version of the author's contribution as presented on CD,  page 1162, code TS.FM10-3.01
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000014646 962__ $$r13812
000014646 980__ $$aPAPER