On the decay of a turbulent vortex ring
The spatiotemporal evolution of a turbulent vortex ring with an initial Reynolds number of 7500 is experimentally investigated using the technique of digital particle image velocimetry. The flow is initially characterized by the laminar/turbulent transition via azimuthal bending instabilities. After transition, the shedding of vorticity from peripheral regions of the ring is found to be responsible for the formation of a wake region. This shedding process results in the staircase‐like decay of the circulation and propagation speed of the vortex ring.
© 1994 American Institute of Physics. Received 9 May 1994; accepted 16 August 1994. This work has been supported by the Office of Naval Research (ONR-URI Grant No. N00014-92-J-1610) under the program management of Dr. Edwin Rood.
Published - PhysFluids_6_3806.pdf