Direct numerical simulations of vortex rings at ReΓ = 7500
We present direct numerical simulations of the turbulent decay of vortex rings with ReΓ = 7500. We analyse the vortex dynamics during the nonlinear stage of the instability along with the structure of the vortex wake during the turbulent stage. These simulations enable the quantification of vorticity dynamics and their correlation with structures from dye visualization and the observations of circulation decay that have been reported in related experimental works. Movies are available with the online version of the paper.
© Cambridge University Press 2007. Reprinted with permission. (Received 11 October 2006 and in revised form 16 March 2007). Published online 22 May 2007.