Geometrical statistics of the vorticity vector and the strain rate tensor in rotating turbulence

摘要: We report results on the geometrical statistics of vorticity vector obtained from experiments in electromagnetically forced rotating turbulence. A range rotation rates Ω is considered, non-rotating to rapidly turbulence with a maximum background rate = 5 rad/s (with Rossby number much smaller than unity). Typically, Taylor-scale Reynolds our around Reλ ≈ 100. The measurement volume located centre fluid container above bottom boundary layer, where turbulent flow can be considered locally statistically isotropic and horizontally homogeneous for case, see L.J.A. van Bokhoven, H.J.H. Clercx, G.J.F. Heijst, R.R. Trieling, Experiments flows, Phys. Fluids 21 (2009) 096601. Based full set velocity derivatives, measured Lagrangian way by three-dimensional (3D) particle tracking velocimetry, we have been able quantify effect system rot...