Cover Page PRL 2017 

Numerical Von Karman (VKN) : 

Movie VKN of the velocity	MovieVKN of the enstrophy
: S. Kreuzahler

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Penalisation of the Taylor-Green 1/2 :

Dynamo mode inside bounded velocity flow force by the Taylor-Green 1/2

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 G.O Robert Dynamo :
 
GO Roberts Flow ( Average in time Enstrophy  k=1,  k=2 ,  snapshoot enstrophy, Dynamo mode (movie)  )

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Taylor-Green Dynamo

Mean flow of the Taylor-Green                    Dynamo TG modes                  Average in time  TG dynamo mode

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Sub Critical Dynamo in the Taylor-Green
   
  Cover Page PRL                                   Hysteresis cycle and magnetic mode associated    

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Intermittance On-Off in the ABC Dynamo

min max ABC flow                                            ABC dynamo mode                                                                 On Off ABC dynamo modes

 
          Magnetic energy On Off intermittency                                       Magnetic energy On Off intermittency  (log)