Decay of turbulence at high Reynolds numbers

Using the unique capabilities of the Variable Density Turbulence Tunnel at the Max Planck Institute for Dynamics and Self-Organization, we investigated virtually homogeneous and isotropic grid turbulence over a wide range of Reynolds numbers, $Re = UM/\nu$, between $10^4$ and $5\cdot 10^6$. The choice of pressurizable Sulfur Hexafluoride as a...