Wake-Induced Oscillatory Paths of Bodies Freely Rising or Falling in Fluids

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Paths and wakes of deformable nearly spheroidal rising bubbles close to the transition to path instability (2016, background): “This is actually a general characteristic of the zigzagging motion of axisymmetric bodies with aspect ratios not too far from unity [6,42], in contrast to the behavior of flat bodies.”
Falling styles of disks (2012, background): “Such tiny deviations are frequently reported in experiments but can hardly be characterized because the accuracy of the measurement systems is generally not sufficient to resolve them properly and also because it is extremely hard to get rid of small spurious fluctuating motions in the carrying flui”
Bubbly and Buoyant Particle–Laden Turbulent Flows (2020, background): “Note that the above definition for Ga, which is alternately referred to as the Archimedes number Ar is equivalent (Ern et al. 2012).”
Agitation, Mixing, and Transfers Induced by Bubbles (2018, background): “Freely rising or falling bodies are observed to follow oscillatory paths when their wake becomes unsteady (Ern et al. 2012).”