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CATEGORIES:Isaac Newton Institute Seminar Series
SUMMARY:Investigating Pure Quantum Turbulence in Superflui
 d 3He and a Means of Directly Inferring the Turbul
 ent Energy Content - Pickett\, G (Lancaster Univer
 sity)
DTSTART;TZID=Europe/London:20121204T155000
DTEND;TZID=Europe/London:20121204T161000
UID:TALK41820AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/41820
DESCRIPTION:The lack of a general solution to the governing Na
 vier-Stokes equations means that there is no funda
 mental theory of turbulence. Simpler pure quantum 
 turbulence\, the tangle of identical singly-quanti
 zed vortices in superfluids at T~0 may provide a d
 eeper understanding of turbulence in general. In t
 he present context this is especially relevant to 
 the measurement of the turbulent energy. While the
  well-known Kolmogorov theory predicts the energy 
 distribution of turbulence and how it decays\, in 
 normal systems the turbulent energy is generally o
 nly a small perturbation on the total thermal ener
 gy of the supporting medium. In quantum turbulence
 \, however\, the turbulent energy is accessible. A
  stationary condensate is necessarily in its groun
 d state with zero enthalpy. Thus any added quantum
  turbulence accounts for the entire free energy of
  the superfluid and there are no other contributio
 ns. \n\nIn superfluid 3He we can generated and det
 ect quantum turbulence and how it evolves with tim
 e\, and using bolometric methods\, we can measure 
 the energy released as previously-generated turbul
 ence decays\, which seems to be unique to these sy
 stems. \n
LOCATION:Seminar Room 1\, Newton Institute
CONTACT:Mustapha Amrani
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