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SUMMARY:Jakub Cach
DTSTART:20250521T070000Z
DTEND:20250521T080000Z
DTSTAMP:20260422T122103Z
UID:MathMAC/37
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/MathMAC/37/"
 >Traction profiles of the Turek benchmark and their relation to bifurcatio
 ns for Navier Stokes fluids</a>\nby Jakub Cach as part of Modelling of mat
 erials - theory\, model reduction and efficient numerical methods (UNCE Ma
 thMAC)\n\n\nAbstract\nWe present a consistent numerical study on the stabi
 lity of the Navier-Stokes fluid in the confined flow around a cylinder. We
  performed the study within the Turek benchmark for Reynolds numbers up to
  1000. The key outcome is that changes in the nature of flow regimes are d
 riven by the upstream dynamics of the cylinder obstacle rather than by the
  downstream effect in the vortex wake. It turns out that the most sensitiv
 e indicator is the pointwise traction profile on the cylinder boundary. An
 other observation is in the case of laminar vortex shedding\, where the mu
 ltiple steady solutions differ from the global-in-time attractor\, which a
 ppears to be unique and robust across a large range of Reynolds numbers. A
 s an auxiliary contribution\, we also discuss a weak (variational) formula
 tion for traction computation\, which offers practical advantages.\n
LOCATION:https://researchseminars.org/talk/MathMAC/37/
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