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CATEGORIES:Engineering Fluids Group Seminar
SUMMARY:Controversial issues concerning the origin of the 
 Earth’s magnetic field - Professor Emmanuel Dormy\
 , ENS Paris
DTSTART;TZID=Europe/London:20200313T130000
DTEND;TZID=Europe/London:20200313T140000
UID:TALK138421AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/138421
DESCRIPTION:The origin of the Earth’s magnetic field is an app
 arently simple\, yet challenging problem. In terms
  of mathematical models\, dynamo action in a rotat
 ing spherical domain is the -now well established-
  model to account for the magnetic field of planet
 s and stars. Whereas the relevant equations are ea
 sily written\, the parameters regime relevant to t
 he Earth’s core is so extreme that a numerical sol
 ution with these parameters is out of reach of tod
 ay’s largest computers. This raises the daunting q
 uestion of the relevance of today’s state-of-the-a
 rt numerical models to the mechanisms at work with
 in our planet. Several issues\, on which researche
 rs often disagree\, naturally follow: What can we 
 learn by comparing models with observations? Can w
 e test numerical models against theoretical result
 s? Can the relevant forces balance in the Earth’s 
 core be approached in numerical models? Could the 
 unresolved small scale and rapidly varying flow be
  important? In this talk\, I will try to place the
  emphasis on open and controversial issues. 
LOCATION:LT6\, Baker Building\, CUED
CONTACT:Connor O'Pray
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