ArticleRheologica acta2014
Effect of solid boundaries on swimming dynamics of microorganisms in a viscoelastic fluid.
Article in Rheologica acta, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
5 citing papers in PubMed.
- Densitaxis: Active particle motion in density gradients.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
- Reduced surface accumulation of swimming bacteria in viscoelastic polymer fluids.Proceedings of the National Academy of Sciences of the United States of America · 2022Article
- Hotspots of boundary accumulation: dynamics and statistics of micro-swimmers in flowing films.Journal of the Royal Society, Interface · 2016Article
- Biogenic mixing induced by intermediate Reynolds number swimming in stratified fluids.Scientific reports · 2015Article
- Interplay of physical mechanisms and biofilm processes: review of microfluidic methods.Lab on a chip · 2015Review
Corrections and comments
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Authors and funding
3 authors.
Funding
Abstract
We numerically study the effect of solid boundaries on the swimming behavior of a motile microorganism in viscoelastic media. Understanding the swimmer-wall hydrodynamic interactions is crucial to elucidate the adhesion of bacterial cells to nearby substrates which is precursor to the formation of the microbial biofilms. The microorganism is simulated using a squirmer model that captures the major swimming mechanisms of potential, extensile, and contractile types of swimmers, while neglecting the biological complexities. A Giesekus constitutive equation is utilized to describe both viscoelasticity and shear-thinning behavior of the background fluid. We found that the viscoelasticity strongly affects the near-wall motion of a squirmer by generating an opposing polymeric torque which impedes the rotation of the swimmer away from the wall. In particular, the time a neutral squirmer spends at the close proximity of the wall is shown to increase with polymer relaxation time and reaches a maximum at Weissenberg number of unity. The shear-thinning effect is found to weaken the solvent stress and therefore, increases the swimmer-wall contact time. For a puller swimmer, the polymer stretching mainly occurs around its lateral sides, leading to reduced elastic resistance against its locomotion. The neutral and puller swimmers eventually escape the wall attraction effect due to a releasing force generated by the Newtonian viscous stress. In contrast, the pusher is found to be perpetually trapped near the wall as a result of the formation of a highly stretched region behind its body. It is shown that the shear-thinning property of the fluid weakens the wall-trapping effect for the pusher squirmer.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.