Phys.org  June 20, 2023 Material boundaries of the experimental apparatus developed to generate turbulence pose a challenge for understanding what the turbulence has been fed and how it would freely evolve. An international team of researchers (USA – University of Chicago, UC Santa Barbara, France) built and controlled a confined state of turbulence using vortex rings. The stationary and isolated blob of turbulence was sustained solely by vortex rings. Thus they assembled a full picture of its three-dimensional structure, onset, energy budget and tunability. The incoming vortex rings could be endowed with conserved quantities, such as helicity, which could be […]