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SUMMARY:Geokolloqium\, Prof. David C. Mays
UID:8d1a-1384-c57c-22038@www.gzn.nat.fau.de
DESCRIPTION:&#8211\; GEOWISSENSCHAFTLICHES KOLLOQUIUM &#8211\; Chaotic
  Advection in Porous Media: Dimensionality\, Scaling\, and Engineering
  Vortragender: Prof. David C. Mays University of Colorado Denver The g
 rowing body of literature exploring chaotic advection in porous media 
 has provided new insights into solute transport\, mixing\, and reactio
 n in two-dimensional (2D) and 3D geometries and spanning the micromete
 r scale of pores to the 10-meter scale of groundwater remediation fiel
 d sites. Chaotic advection refers to chaos in laminar flows manifestin
 g unpredictability from sensitive dependence on initial conditions\, p
 opularly known as the butterfly effect. This unpredictability results\
 , not from inertial terms in the Navier-Stokes equations nor from rand
 om heterogeneity in the porous media\, but from the nonlinear structur
 e of the dynamic system itself\, in which solute plumes are stretched 
 and folded\, popularly known as the baker&#8217\;s transformation. The
  analysis of such flows depends on Lagrangian tools including Lyapunov
  exponents to quantify the butterfly effect and Poincaré sections to 
 visualize the flow morphology. The literature features three principal
  applications to date\, namely (1) ubiquitous chaotic advection at the
  pore scale\, (2) naturally occurring chaotic advection at the Darcy s
 cale\, and (3) engineered chaotic advection\, a subset of engineered i
 njection and extraction (EIE). Among these applications\, EIE has attr
 acted the most attention so far\, including theoretical developments\,
  laboratory experiments\, and one field test\, with contributions from
  groups in Australia\, Canada\, Germany\, India\, Spain\, and the Unit
 ed States. Chaotic advection in porous media holds promise for underst
 anding natural processes\, such as carbon and nutrient cycling\, and e
 ngineered processes\, such as groundwater remediation and in situ leac
 h mining. If one accepts the premise that the rich complexity of bioge
 ochemistry in subsurface environments is often transp
DTSTART:20250716T150000Z
DTEND:20250716T160000Z
LOCATION:Übungsraum Geologie (00301.01.124)
DTSTAMP:20260411T180207Z
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