BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Interaction between fast tides and convection - Caroline Terquem (
 University of Oxford)
DTSTART:20240116T143000Z
DTEND:20240116T151500Z
UID:TALK208522@talks.cam.ac.uk
DESCRIPTION:All the studies of the interaction between tides and a convect
 ive flow assume that the large-scale tides can be described as a mean she
 ar flow that is damped by small-scale fluctuating convective eddies. The
  convective Reynolds stress is calculated using mixing length theory\, acc
 ounting for a sharp suppression of dissipation when the turnover time-scal
 e is larger than the tidal period. This yields tidal dissipation rates sev
 eral orders of magnitude too small to account for observations. We have re
 cently argued that the above description is inconsistent\, and that the st
 andard picture should be reversed\, with the fluctuations being the tidal
  oscillations and the mean shear flow provided by the largest convective 
 eddies.&nbsp\; This yields an energy exchange rate between the oscillation
  and &nbsp\;the convective flow that couples the Reynolds stress of the o
 scillation with the convective velocity gradient.&nbsp\; Assuming local di
 ssipation of the tides\, this new formalism gives good agreement with obse
 rvations.&nbsp\; However\, so far\, the formalism does not rule out the po
 ssibility that the tides extract energy from convection\, instead of being
  dissipated.&nbsp\;
LOCATION:Seminar Room 1\, Newton Institute
END:VEVENT
END:VCALENDAR