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Symmetry-breaking phase transitions in highly concentrated semen

Creppy, Adama Kpatagnon and Plouraboué, Franck and Praud, Olivier and Druart, Xavier and Cazin, Sébastien and Yu, Hui and Degond, Pierre Symmetry-breaking phase transitions in highly concentrated semen. (2016) Journal of The Royal Society Interface, 13 (123). 1-12. ISSN 1742-5689

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Official URL: http://dx.doi.org/10.1098/rsif.2016.0575


New experimental evidence of self-motion of a confined active suspension is presented. Depositing fresh semen sample in an annular shaped microfluidic chip leads to a spontaneous vortex state of the fluid at sufficiently large sperm concentration. The rotation occurs unpredictably clockwise or counterclockwise and is robust and stable. Furthermore, for highly active and concentrated semen, richer dynamics can occur such as self-sustained or damped rotation oscillations. Experimental results obtained with systematic dilution provide a clear evidence of a phase transition towards collective motion associated with local alignment of spermatozoa akin to the Vicsek model. A macroscopic theory based on previously derived self-organized hydrodynamics models is adapted to this context and provides predictions consistent with the observed stationary motion.

Item Type:Article
Additional Information:©2016 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. Creppy A, Plouraboué F, Praud O, Druart X, Cazin S, Yu H, Degond P. 2016 Symmetry-breaking phase transitions in highly concentrated semen. J. R. Soc. Interface 13: 20160575. http://dx.doi.org/10.1098/rsif.2016.0575
HAL Id:hal-01380772
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Imperial College London (UNITED KINGDOM)
Laboratory name:
This work has been supported by the Agence Nationale pour la Recherche (ANR) under grant no. MOTIMO (ANR-11-MONU-009- 01), by the National Science Foundation (NSF) under grant RNMS11- 07444 (KI-Net), by the Engineering and Physical Sciences Research Counc
Deposited On:13 Oct 2016 11:43

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