VKN Dynamo cover pageCover Page PRL 2017

Numerical Von Karman (VKN) : 

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

 

Penalisation of the Taylor-Green 1/2 :


Penalisation

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

G.O Robert Dynamo :


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

Taylor-Green Dynamo


mean flow Taylor-GreenMean flow of the Taylor-Green TG dynamo modesDynamo TG modesaverage in time TG dynamo modeAverage in time TG dynamo mode

Sub Critical Dynamo in the Taylor-Green


vover pageCover Page PRL   Sub dynamo modeHysteresis cycle and magnetic mode associatedSub dynamo mode

Intermittance On-Off in the ABC Dynamo


min max ABC flowmin max ABC flowABC dynamoABC dynamo modeON OFF dynamo modesOn Off ABC dynamo modes


On Off EnergyMagnetic energy On Off intermittency  On Off Energy in logMagnetic energy On Off intermittency (log)