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A bidimensional periodical fluid with strictly identical initial velocities and with a vertically shifted central obstacle and with display of velocity histograms [Un fluide bidimensionnel périodique avec des vitesses strictement identiques initialement et un obstacle central très légèrement décale verticalement, avec visualisation de l'histogramme des modules des vitesses].




A higly symmetrical system (a bidimensional periodical fluid with strictly identical initial velocities and with a vertically shifted central obstacle)can lost very fast the memory of its initial symmetry -with display of velocity histograms- See the 64 first time steps of this phenomenon.
A bidimensional periodical fluid with strictly identical initial velocities and with a vertically shifted central obstacle See the same phenomenon without the velocity histograms.
Tridimensional display of the particle density of a bidimensional periodical fluid with strictly identical initial velocities and with a vertically shifted central obstacle See a tridimensional display of the particle density of this phenomenon.


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