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@article{Creppy:2016:10.1098/rsif.2016.0575,
author = {Creppy, A and Plouraboué, F and Praud, O and Druart, X and Cazin, S and Yu, H and Degond, PAA},
doi = {10.1098/rsif.2016.0575},
journal = {Journal of the Royal Society Interface},
title = {Symmetry-breaking phase-transitions in highly concentrated semen},
url = {http://dx.doi.org/10.1098/rsif.2016.0575},
volume = {13},
year = {2016}
}

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TY  - JOUR
AB  - New experimental evidence of self-motion of aconfined active suspension is presented. Depositingfresh semen sample in an annular shaped micro-fluidic chip leads to a spontaneous vortex state ofthe fluid at sufficiently large sperm concentration.The rotation occurs unpredictably clockwise orcounterclockwise and is robust and stable. Furthermore,for highly active and concentrated semen, richerdynamics can occur such as self-sustained or dampedrotation oscillations. Experimental results obtainedwith systematic dilution provide a clear evidence of aphase transition toward collective motion associatedwith local alignment of spermatozoa akin to theVicsek model. A macroscopic theory based onpreviously derived Self-Organized Hydrodynamics(SOH) models is adapted to this context and providespredictions consistent with the observed stationarymotion.
AU  - Creppy,A
AU  - Plouraboué,F
AU  - Praud,O
AU  - Druart,X
AU  - Cazin,S
AU  - Yu,H
AU  - Degond,PAA
DO  - 10.1098/rsif.2016.0575
PY  - 2016///
SN  - 1742-5689
TI  - Symmetry-breaking phase-transitions in highly concentrated semen
T2  - Journal of the Royal Society Interface
UR  - http://dx.doi.org/10.1098/rsif.2016.0575
UR  - http://hdl.handle.net/10044/1/40154
VL  - 13
ER  -

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