Wake-Induced Oscillatory Paths of Bodies Freely Rising or Falling in Fluids: Supplemental Video 2b

A supplemental video from the 2012 review by Patricia Ern, Frédéric Risso, David Fabre, and Jacques Magnaudet, "Wake-Induced Oscillatory Paths of Bodies Freely Rising or Falling in Fluids," from the Annual Review of Fluid Mechanics.

Path and wake (illustrated with streamwise vorticity isosurfaces) of an oblate spheroidal bubble with χ = 2.5 and Ar = 138. Note the two transitions, first from a straight vertical path to a planar zigzag and much later from this zigzag to a helical path, and the associated changes in the wake structure. From a DNS by Mougin & Magnaudet (2002b).