2007/08/29 by Haitao Xu, Nicholas T. Ouellette, Dario Vincenzi +1 · 1 citation
Earth and Planetary Sciences · Engineering · Physics and Astronomy · #Aeolian processes and effects #Fluid Dynamics and Turbulent Flows #Particle Dynamics in Fluid Flows #physics.flu-dyn
paper · pdf · doi:10.1103/physrevlett.99.204501
published as Phys. Rev. Lett. 99, 204501 (2007) · 5 pages, 3 figures
arxiv created 2007/08/29 · openalex publication_date 2007/11/14 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present measurements of fluid particle accelerations in turbulent water flow between counterrotating disks using three-dimensional Lagrangian particle tracking. By simultaneously following multiple particles with sub-Kolmogorov-time-scale temporal resolution, we measured the spatial correlation of fluid particle acceleration at Taylor microscale Reynolds numbers between 200 and 690. We also obtained indirect, nonintrusive measurements of the Eulerian pressure structure functions by integrating the acceleration correlations. Our measurements are in good agreement with the theoretical predictions of the acceleration correlations and the pressure structure function in isotropic high-Reynolds number turbulence by Obukhov and Yaglom in 1951 [Prikl. Mat. Mekh. 15, 3 (1951)]. The measured pressure structure functions display K41 scaling in the inertial range.