Discrete map reduction of bursting flows in periodically driven cylindrical cavities

A. Meseguer, F. Marques and C. Panades

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Movie 1. Figure 1a Movie 2. Figure 1b
Animation of B1. Animation of B2.
Translucent isosurfaces of streamfunction show the axisymmetric rollers of the base state B0. Solid isosurfaces of helicity show the braid structures associated with three-dimensional instabilities of the rollers. Red (yellow) isosurfaces correspond to positive (negative) helicity values.
Movie 3. Figure 4 Movie 4. Figure 6
Animation of the axial vorticity contours at the horizontal section z=-1/2, of the Burst solution at (St,Re)= (17,407.82). Animation of the axial vorticity contours at the horizontal section z=-1/2, of the IC solution at (St,Re)= (17,407.8074).
Solid (dashed) contours are positive (negative); red and yellow colors correspond to positive and negative axial vorticity.