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SUMMARY:MEchanics GAthering –MEGA- Seminar: Vortex dislocation in the ne
 ar wake of a span-wise varied cylinder
DTSTART:20240314T161500
DTEND:20240314T171500
DTSTAMP:20260508T194527Z
UID:e2835273ab98a8ee78d4e538691cae958ccc4f1fbbfe91d342f3370b
CATEGORIES:Conferences - Seminars
DESCRIPTION:Yefei Yang (UNFoLD\, EPFL)\nAbstract The shedding of vortices
  in the wake of cylindrical structures leads to structural vibrations\, si
 gnificant increases in drag forces\, and aeroacoustic noise issues.\nIntro
 ducing span-wise geometric disturbances to the nominally two-dimensional b
 ase form of a uniform cylinder is an effective method to control vortex sh
 edding. We focus on the vortex shedding patterns in the wake of these span
 -wise varied cylinders\, especially the dislocation phenomenon at the inte
 rfaces of vortices from different span-wise cells. The automatic identific
 ation and extraction of dislocation occurrences are achieved by several no
 vel approaches based on flow visualizations. We classify the extracted dis
 locations into different modes. The effects of different modes on vortex s
 hedding patterns are further analyzed based on the proper orthogonal decom
 position method and two-dimensional Fast Fourier Transform analysis. The r
 esearch holds significant promise for advancing our understanding of vorte
 x dislocations and enabling effective control strategies in potential engi
 neering applications.\n\nBio Yefei Yang is a visiting PhD student in the 
 Unsteady Flow Diagnostics Laboratory (UNFoLD) at EPFL\, since March 2023. 
 His research focuses on the wake dynamics of flow past cylindrical structu
 res. Yefei Yang obtained his master diploma in civil engineering from Harb
 in Institute of Technology in China and continued his PhD studies there.
LOCATION:MED 0 1418 https://plan.epfl.ch/?room==MED%200%201418 https://epf
 l.zoom.us/j/67041786969?pwd=a1lXa3lsVGpvL1VpN2RDR2l4clg0QT09
STATUS:CONFIRMED
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