The article says:
Max Planck researchers in Göttingen answer the decades-old question of how particles separate in turbulence.
This is the 3D-PTV system with the same principle as the system we use in ETH Zurich [link] for some time, but it's faster (something like 4 times faster) and it generates a huge amount of data. The group is very active, it moved from Cornell University, USA to Max Planck and now the "sky is the limit". We all will meet in Leiden in "Mixing and Stirring: the Langrangian approach" meeting and workshop [link]. Looking for a constructive and fruitful discussions.