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SUMMARY:Spinning rods\, microfluidics\, and propulsion by cilia in biologi
 cal systems
DTSTART:20150129T140000
DTEND:20150129T160000
DTSTAMP:20260527T190521Z
UID:dc0167a48b0a605dbcc0f8779cbd2bfbf5f2f4dc26a79e6de64b27bd
CATEGORIES:Conferences - Seminars
DESCRIPTION:Roberto Camassa\nAn important component in understanding and m
 odeling how human lungs function lies in the hydrodynamics of the mucus fl
 uid layers that coat lung airways. In healthy subjects\, the beating of ci
 lia is thought to be the primary mechanism for moving mucus. With the aim 
 of establishing a quantitative benchmark of how cilia motion propels the s
 urrounding fluid\, we study the idealized situation of a single rod spinni
 ng in a fluid obeying the Stokes approximation\, the appropriate limit for
  a Newtonian fluid with typical dimensions and time scales of cilia dynami
 cs. New approximate -- for cylindrical rods pinned to a flat plane boundar
 y\, and exact -- for ellipsoidal rods freely spinning around their center 
 -- solutions for the fluid motion will be presented and compared with the 
 experimental data collected with spinning magnetic nano-rods in water. In 
 order to assess the influence of Brownian perturbations in this micro-scal
 e experiment\, data from an experimental set-up scaled by dynamical simila
 rity to macroscopic (table-top) dimensions will also be presented and comp
 ared to the theoretical predictions.
LOCATION:BI A0 448 https://plan.epfl.ch/?room==BI%20A0%20448
STATUS:CONFIRMED
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