We report experimental results on the Lagrangian dynamics of finite-size light particles in turbulence. Using an orthogonal camera setup and 3D particle tracking, we study the velocity and acceleration statistics of rigid light spheres in a water tunnel with nearly homogeneous and isotropic turbulence. The Reynolds number (Reλ) is varied from 180 to 300, and the study covers a range of size ratios (4 < Ξ < 16) for marginally light spheres. We find that the normalized acceleration PDF decreases in intermittency with increasing size ratio - in qualitative agreement with the predictions of the Faxén corrected model . We also present preliminary results on the rotational dynamics of large light spheres in turbulence.
|Publication status||Published - 1 Jan 2015|
|Event||15th European Turbulence Conference, ETC 2015 - Delft, Netherlands|
Duration: 25 Aug 2015 → 28 Aug 2015
Conference number: 15
|Conference||15th European Turbulence Conference, ETC 2015|
|Abbreviated title||ETC 2015|
|Period||25/08/15 → 28/08/15|