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- W2112788913 abstract "Sperm traverse their microenvironment through viscous fluid by propagating flagellar waves; the waveform emerges as a consequence of elastic structure, internal active moments and low Reynolds number fluid dynamics. Engineered microchannels have recently been proposed as a method of sorting and manipulating motile cells; the interaction of cells with these artificial environments therefore warrants investigation. A numerical method is presented for large-amplitude elastohydrodynamic interaction of active swimmers with domain features. This method is employed to examine hydrodynamic scattering by a model microchannel backstep feature. Scattering is shown to depend on backstep height and the relative strength of viscous and elastic forces in the flagellum. In a ‘high viscosity’ parameter regime corresponding to human sperm in cervical mucus analogue, this hydrodynamic contribution to scattering is comparable in magnitude to recent data on contact effects, being of the order of 5°–10°. Scattering can be positive or negative depending on the relative strength of viscous and elastic effects, emphasizing the importance of viscosity on the interaction of sperm with their microenvironment. The modulation of scattering angle by viscosity is associated with variations in flagellar asymmetry induced by the elastohydrodynamic interaction with the boundary feature." @default.
- W2112788913 created "2016-06-24" @default.
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- W2112788913 date "2015-03-01" @default.
- W2112788913 modified "2023-09-23" @default.
- W2112788913 title "Spermatozoa scattering by a microchannel feature: an elastohydrodynamic model" @default.
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- W2112788913 doi "https://doi.org/10.1098/rsos.140475" @default.
- W2112788913 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4448824" @default.
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