Extended Data Fig. 5: Steady and unsteady wake behind porous disks and pappi.
From: A separated vortex ring underlies the flight of the dandelion
Video snapshots are shown. a–d, The flow visualization behind a solid disk, with a steady wake (a) and an unsteady wake at three time points within one period of vortex shedding (b–d). e–h, The flow around a porous disk (ε = 0.75) with a steady wake (e) and an unsteady wake at three time points within one period of vortex shedding (f–h). i–l, The wake behind a dandelion sample with a steady SVR (i) and at three time points within one period of vortex shedding (j–l).
