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DTSTAMP:20260426T212709Z
UID:64fac8743e6bc306324915@ist.ac.at
DTSTART:20231102T110000
DTEND:20231102T120000
DESCRIPTION:Speaker: Stephane Guillet\nhosted by Jérémie Palacci\nAbstrac
 t: Confined flows are encountered at all scales in nature\, whether it's i
 n our blood vessels or in fluids like oil flowing through underground rock
 s. The emergence of microfluidics as a lab-on-a-chip technology has paved 
 the way for studying these flows\, moving away from the constraints of in-
 situ measurements.In this talk\, I investigate two fundamental questions a
 bout the dynamics of confined fluids. In the first part\, through a combin
 ation of model experiments\, numerical simulations\, and analytical work\,
  I explain how the curvature of space alters the typical plug flows of con
 fined fluids in homogeneous environments. After establishing the impact of
  isotropic curvature heterogeneity\, I demonstrate how local curvature ani
 sotropies act as singular perturbations. By drawing an analogy with the la
 ws of electrostatics in two dimensions\, I illustrate that these results a
 re not limited to confined flows but also encompass the entire range of La
 placian problems to which they belong\, from diffusive transport in soluti
 ons to Ohmic transport in 2D materials.In a second part\, I show how the c
 ompetition between hydrodynamic and potential interactions results in the 
 melting of crystalline emulsions even when forced far from equilibrium in 
 a homogeneous manner. I demonstrate in particular how hydrodynamic interac
 tions propel dislocations upstream of the forcing to form statistically st
 ationary but perpetually rearranging polycrystals.
LOCATION:Moonstone Bldg / Ground floor / Seminar Room F (I24.EG.030f)\, IST
 A
ORGANIZER:cpetz@ist.ac.at
SUMMARY:Stephane Guillet: Confined viscous flows: flowing in curved space a
 nd hydrodynamic interactions
URL:https://talks-calendar.ista.ac.at/events/4507
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