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SUMMARY:A Numerical Investigation of the Fluid Mechanical Sewing Machine
DTSTART:20120217T110000
DTSTAMP:20260916T005332Z
UID:d7b8d541dd34317e2b8801b37185b89952483a5aa19e91361cacc46c
CATEGORIES:Conferences - Seminars
DESCRIPTION:By Pierre-Thomas Brun\, Univ. Paris-Sud\nA thin thread of visc
 ous fluid falling onto a moving belt generates a surprising variety of pa
 tterns depending on the belt speed\, fall height\, flow rate\, and fluid
  properties.\n\nTo understand the rich nonlinear dynamics of this system\,
  we have developed a new numerical code for simulating unsteady viscous th
 reads\, based on a discrete description of the geometry and a variational 
 formulation for the viscous stresses.\n\nThe code successfully reproduces 
 all major features of the experimental state diagram of Morris et al. (Phy
 s. Rev. E 2008). Fourier analysis of the motion of the thread's contact po
 int with the belt suggests a new classification of the observed patterns\,
  and reveals that the system behaves as a nonlinear oscillator coupling th
 e pendulum modes of the thread.
LOCATION:MEB331
STATUS:CONFIRMED
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