Undulatory swimming in shear-thinning fluids: experiments with Caenorhabditis elegans
نویسندگان
چکیده
منابع مشابه
Undulatory swimming in shear-thinning fluids: Experiments with C. elegans
The swimming behaviour of microorganisms can be strongly influenced by the rhe ology of their fluid environment. In this manuscript, we experimentally investigate the effects of shear-thinning viscosity on the swimming behaviour of an undula tory swimmer, the nematode Caenorhabditis elegans. Tracking methods are used to measure the swimmer’s kinematic data (including propulsion speed) and vel...
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The effects of fluid elasticity on the swimming behavior of the nematode Caenorhabditis elegans are experimentally investigated by tracking the nematode's motion and measuring the corresponding velocity fields. We find that fluid elasticity hinders self-propulsion. Compared to Newtonian solutions, fluid elasticity leads to up to 35% slower propulsion. Furthermore, self-propulsion decreases as e...
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Direct numerical simulation of the weakly turbulent flow of non-Newtonian fluids is undertaken for two different generalised Newtonian rheology models using a spectral element-Fourier method. Results for a power law (shear-thinning) rheology agree well with experimentally determined logarithmic layer correlations and with other previously published experimental work. As the flow index becomes s...
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The locomotory behavior of the nematode Caenorhabditis elegans is often characterized by two distinct gaits-swimming when in fluids and crawling when on surfaces. Swimming is characterized by about a twice greater wavelength and about four time greater frequency of undulatory waves, compared with the crawling gait. These mechanisms which generate these gaits are not well-understood but have bee...
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ژورنال
عنوان ژورنال: Journal of Fluid Mechanics
سال: 2014
ISSN: 0022-1120,1469-7645
DOI: 10.1017/jfm.2014.539