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SUMMARY:A Numerical Investigation of the Fluid Mechanical Sewing Machine
DTSTART:20120217T110000
DTSTAMP:20260427T223340Z
UID:c496e29922a97af0b1d576000c708e1f3a8df445342a269459c823a7
CATEGORIES:Conferences - Seminars
DESCRIPTION:Pierre-Thomas Brun\, Institut Jean le Rond d'Alembert/Lab. FAS
 T\, UPMC\, Univ Paris-Sud\, CNRS\nA thin thread of viscous fluid falling 
 onto a moving belt generates a surprising variety of patterns depending on
  the belt speed\, fall height\, flow rate\, and fluid properties. To und
 erstand the rich nonlinear dynamics of this system\, we have developed a n
 ew numerical code for simulating unsteady viscous threads\, based on a dis
 crete description of the geometry and a variational formulation for the vi
 scous stresses. The code successfully reproduces all major features of the
  experimental state diagram of Morris et al. (Phys. Rev. E 2008). Fourier 
 analysis of the motion of the thread's contact point with the belt suggest
 s a new classification of the observed patterns\, and reveals that the sys
 tem behaves as a nonlinear oscillator coupling the pendulum modes of the t
 hread.
LOCATION:MEB331
STATUS:CONFIRMED
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