TY - GEN A1 - Weiss, Stephan A1 - Schanz, Daniel A1 - Erdogdu, Ahmed Oguzhan A1 - Schröder, Andreas A1 - Bosbach, Johannes T1 - Investigation of turbulent superstructures in Rayleigh–Bénard convection by Lagrangian particle tracking of fluorescent microspheres T2 - Experiments in Fluids N2 - We present spatially and temporally resolved velocity and acceleration measurements of turbulent Rayleigh–Bénard convection (RBC) in the entire fluid sample of square horizontal cross section with length L=320 mm and height H=20 mm, resulting in an aspect ratio of Γ=H/L=16. The working fluid was water with a Prandtl number of Pr =7 and the Rayleigh number was set to Ra=1.1×106. In order to minimize surface reflections, we used fluorescent polyethylene microspheres as tracer particles that were imaged at a rate of 19 Hz by six cameras. From the images, the particle positions, velocities, and accelerations were determined via the ‘Shake-The-Box’ (STB) Lagrangian particle tracking algorithm. With this approach, we could simultaneously track more than 300,000 particles and hence study the resulting turbulent structures in the Eulerian and Lagrangian frames while resolving the smallest spatial and temporal scales of the flow. KW - - KW - Engineering Y1 - 2023 U6 - https://doi.org/10.1007/s00348-023-03624-9 SN - 0723-4864 SN - 1432-1114 VL - 64 IS - 4 PB - Springer Berlin Heidelberg ER -