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SUMMARY:Interacting plumes in a rotating environment: The special case of 
 a single plume and The dynamical system of mixing layers - Chris Howland (
 University of Cambridge)\, Jeremy Parker (University of Cambridge)
DTSTART:20190207T113000Z
DTEND:20190207T123000Z
UID:TALK117451@talks.cam.ac.uk
CONTACT:Catherine Pearson
DESCRIPTION:Interacting plumes in a rotating environment: The special case
  of a single plume\n \nTurbulent buoyant plumes are prolific in geophysica
 l and environmental flows\, and on the largest geophysical scales their de
 velopment can be affected by rotation. Previous studies have shown that cl
 assical plume models can predict the early-time development of rotating pl
 umes\, although their long term behaviour is less well understood. This ta
 lk will outline some of the difficulties involved in performing laboratory
  studies of plumes in rotating environments and will present results from 
 experiments performed during the WHOI Geophysical Fluid Dynamics Program. 
 These experiments highlight interesting features that arise when point sou
 rce wall plumes are generated in the presence of ambient rotation.\n\nThe 
 dynamical system of mixing layers - Jeremy Parker\n\nSituations in which a
  light fluid moves above a dense fluid are ubiquitous in the environment\,
  and are one of the classical examples of an instability in fluid dynamics
 . In particular\, they are thought to be responsible for much of the mixin
 g that occurs in the ocean\, with important consequences for the modelling
  of the global ocean circulation and understanding of climate change. An a
 bstract understanding of physical situations like these mixing layers\, th
 e so-called "dynamical systems picture" of fluid mechanics\, permits a hig
 h level understanding of the behaviour as a whole. Different computational
  strategies are discussed to understand mixing layers through the lens of 
 dynamical systems\, including Direct-Adjoint Looping\, an optimisation tec
 hnique\, and Newton-Krylov iteration to find exact coherent solutions to t
 he system.\n
LOCATION:Open Plan Area\, BP Institute\, Madingley Rise CB3 0EZ
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