Lagrangian velocity and acceleration auto-correlations in rotating turbulence

L Del Castello, H J H Clercx
2011 Journal of Physics, Conference Series  
Rotating turbulence has often been studied by numerical simulations and analytical models. Experimental data is scarce and purely of Eulerian nature. In the present study, experiments on continuously forced turbulence subjected to background rotation are performed by means of 3D Particle Tracking Velocimetry. The data is processed in the Lagrangian as well as in the Eulerian frame. The background rotation is confirmed to induce two-dimensionalisation of the flow field, and the large-scales are
more » ... ominated by stable counter-rotating vertical tubes of vorticity. The auto-correlation coefficients along particle trajectories of velocity and acceleration components have been explored. We will discuss the effects of rotation on the Lagrangian temporal scales of the flow.
doi:10.1088/1742-6596/318/5/052028 fatcat:6qbbalrqg5d2tp7lorini7adya