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@ARTICLE{Rode:858245,
      author       = {Rode, Sebastian and Elgeti, Jens and Gompper, Gerhard},
      title        = {{S}perm motility in modulated microchannels},
      journal      = {New journal of physics},
      volume       = {21},
      issn         = {1367-2630},
      address      = {[London]},
      publisher    = {IOP73379},
      reportid     = {FZJ-2018-07145},
      pages        = {013016},
      year         = {2019},
      abstract     = {Sperm cells swim through the fluid by a periodic wave-like
                      beating $of\
$ their flagellum. At low Reynolds numbers
                      and in confinement, the directed $motion\
$ of sperm and
                      other microswimmers is strongly influenced by steric and
                      $hydrodynamic\
$ wall interactions. We model sperm
                      motility in mesoscale hydrodynamics $simulations\
$ by
                      imposing a planar traveling bending wave along the
                      flagellum. Sperm are $simulated\
$ swimming in curved,
                      straight, shallow and zigzag-shaped microchannels. Changes
                      $in\
$ the sidewall modulations and the imposed beat
                      pattern allow the identification of $a\
$ strong
                      dependence of the surface attraction on the beat-shape
                      envelope of the $sperm\
$ cell. For swimming in zigzag
                      microchannels, the deflection-angle distribution at
                      $sharp\
$ corners is calculated and found to be in good
                      agreement with recent $microfluidic\
$ experiments. The
                      simulations reveal a strong dependence of the deflection
                      $angle\
$ on the orientation of the beat plane with
                      respect to the channel sidewall, and $thus\
$ deepen the
                      understanding of sperm navigation under strong confinement.
                      $Detachment\
$ of sperm, while swimming along curved
                      walls, is dominated by the change of $beat-\
$ plane
                      orientation. Therefore, either the emergence of a nonplanar
                      component of $the\
$ flagellar beat with increasing
                      wavelength or the strong confinement in shallow
                      $channels\
$ drastically increases wall attraction. Our
                      simulation results reveal a consistent $picture\
$ of
                      passive sperm guidance that is dominated by the steric
                      interactions of the $beat\
$ pattern with the nearby
                      surfaces.},
      cin          = {ICS-2 / JARA-HPC},
      ddc          = {530},
      cid          = {I:(DE-Juel1)ICS-2-20110106 / $I:(DE-82)080012_20140620$},
      pnm          = {553 - Physical Basis of Diseases (POF3-553) / Hydrodynamics
                      of Active Biological Systems $(jiff26_20110501)$},
      pid          = {G:(DE-HGF)POF3-553 / $G:(DE-Juel1)jiff26_20110501$},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000456276000007},
      doi          = {10.1088/1367-2630/aaf544},
      url          = {https://juser.fz-juelich.de/record/858245},
}