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SUMMARY:The structure and origin of confined Holmboe waves - Adrien Lefauv
 e (DAMTP\, University of Cambridge)
DTSTART:20190221T113000Z
DTEND:20190221T123000Z
UID:TALK117331@talks.cam.ac.uk
CONTACT:Catherine Pearson
DESCRIPTION:We describe and elucidate the origin of confined Holmboe waves
 \, which are long-lived coherent structures found in sustained stratified 
 shear flows in the laboratory. We use a combination of (i) novel time-reso
 lved\, volumetric measurements of the three-component velocity and density
  fields simultaneously\; (ii) a linear stability analysis solving for thre
 e-dimensional perturbations about the two-dimensional streamwise-averaged 
 experimental flow. We show that the lateral confinement by the walls of th
 e experimental duct is an important ingredient of the confined Holmboe ins
 tability\, which gives rise to confined Holmboe waves\, with implications 
 for many inherently confined geophysical flows. 
LOCATION:Open Plan Area\, BP Institute\, Madingley Rise CB3 0EZ
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