BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Interfacial mixing by horizontal vortices and shear turbulence - J
 an-bert Flor\, LEGI Grenoble
DTSTART:20080926T083000Z
DTEND:20080926T093000Z
UID:TALK13778@talks.cam.ac.uk
CONTACT:Dr C. P.  Caulfield
DESCRIPTION:We consider various aspects of mixing by Taylor vortices at th
 e interface of a two-layer fluid in a Taylor-Couette flow. Experimental re
 sults show evidence of an increase in mixing efficiency at large Richardso
 n numbers:  for increasing buoyancy gradient the curve of buoyancy flux v
 ersus buoyancy gradient tends to be N-shaped. In relation to surface mixed
 -layer deepening in oceans and lakes\, we compare the entrainment rates by
  shear-generated turbulence and by Taylor vortices that can be considered 
 to represent a model for mixing by continuously driven horizontal vortices
  such as Langmuir circulation. The results suggest that above a critical R
 ichardson number coherent\, horizontal vortices are principally responsibl
 e for mixed-layer deepening. 
LOCATION:Open Plan Area\, BP Institute\, Madingley Rise CB3 0EZ
END:VEVENT
END:VCALENDAR