BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Elliptical instability in planetary and stellar fluid interiors - 
 David Cébron (ETH Zürich)
DTSTART:20120213T160000Z
DTEND:20120213T170000Z
UID:TALK36009@talks.cam.ac.uk
CONTACT:Jérôme Guilet
DESCRIPTION:The elliptical instability is a generic instability which take
 s place in any rotating fluid whose streamlines are (even slightly) ellipt
 ically deformed. Its presence in an aeronautical context is well establish
 ed\, but its existence in geo- or astrophysical large scale flows raises m
 any issues. In this talk\, I present the first numerical simulations of th
 e elliptical instability in an ellipsoidal geometry\, relevant for planets
 . These simulations allow to quantify the influence of different natural g
 eophysical complexities (oblateness\, convective or stratified flows\, etc
 .)\, and to derive the scaling laws needed to bridge the gap between numer
 ics and planetary or stellar applications. Results on the magnetohydrodyna
 mic flows driven by the elliptical instability are then presented and vali
 dated numerically. Finally\, the obtained results are used to study the pr
 esence of the elliptical instability in known planets\, moons\, and stars.
  Telluric bodies are first considered\, and a stability analysis adapted t
 o this context shows that the instability can be expected in the Early Ear
 th\, the Early Moon\, Europa and three exoplanets (55CnCe\, CoRoT-7b et GJ
 1214b). To conclude\, the possible development of the instability in extra
 -solar Hot-Jupiters systems is considered\, showing its possible relevance
  for some of them\, such as the system of Tau-boo. 
LOCATION:MR14\,  Centre for Mathematical Sciences\, Wilberforce Road\, Cam
 bridge
END:VEVENT
END:VCALENDAR