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SUMMARY:MechE Colloquium: Design of chiral coupling in fluids
DTSTART:20240924T120000
DTEND:20240924T130000
DTSTAMP:20260506T080606Z
UID:f85e8cf58c1f64b8e6f5e11748a5cdfda37c31acca6a25c024b72eb1
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Greg Voth\, Fluid Dynamics and Soft Condensed Matter Lab
 \, Wesleyan University\nAbstract: How can we design particle shapes to opt
 imize coupling of translation to rotation in fluid flow?  This chiral des
 ign problem has a rich history with connections to chiroptical response of
  molecules and metamaterials\, chiral phases in crystals and nematics\, an
 d many applications of particle motion in fluids including locomotion of m
 icro-organisms and robots. Experiments on sedimentation at low Reynolds nu
 mber provide a familiar and concrete context in which to unlearn some over
 simplifications about handedness as a binary or scalar property of particl
 es and replace them with adequate tools for quantifying translation-rotati
 on coupling.  The talk will particularly focus on helical ribbons which c
 an have very simple translation-rotation coupling in certain cases and can
  be modified to approach the maximum complexity of sedimenting particles b
 y changing their length and center of mass. In more complex flows\, partic
 les can be designed to optimize coupling to the velocity gradients in addi
 tion to the relative velocity.\n\nBiography: Greg Voth is professor of phy
 sics at Wesleyan University\, CT\, USA. He was a PhD student at Cornell Un
 iversity with Eberhard Bodenschatz using strip detectors to measure accele
 rations in turbulent flows\, and did a postdoc with Jerry Gollub at Haverf
 ord College studying chaotic mixing and granular flows. His group at Wesle
 yan has focused on development of new tools for measurements in turbulent 
 and/or multi-phase flows.   Recent work has involved measuring motion of
  particles with complex shapes seeking to understand the geometric design 
 problem of how to select shapes to achieve desired dynamics. His research 
 has been recognized by the Andreas Acrivos dissertation award\, a Sloan re
 search fellowship\, and an NSF faculty early career development award.
LOCATION:BM 5202 https://plan.epfl.ch/?room==BM%205202 https://epfl.zoom.u
 s/j/64267570786
STATUS:CONFIRMED
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