Dynamics of finite-sized light spheres in turbulence

Varghese Mathai, Vivek Prakash, Jon Brons, Chao Sun, Detlef Lohse

Research output: Contribution to conferencePaper

Abstract

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 [1]. We also present preliminary results on the rotational dynamics of large light spheres in turbulence.

Original languageEnglish
Publication statusPublished - 1 Jan 2015
Event15th European Turbulence Conference, ETC 2015 - Delft, Netherlands
Duration: 25 Aug 201528 Aug 2015
Conference number: 15

Conference

Conference15th European Turbulence Conference, ETC 2015
Abbreviated titleETC 2015
CountryNetherlands
CityDelft
Period25/08/1528/08/15

Fingerprint Dive into the research topics of 'Dynamics of finite-sized light spheres in turbulence'. Together they form a unique fingerprint.

  • Cite this

    Mathai, V., Prakash, V., Brons, J., Sun, C., & Lohse, D. (2015). Dynamics of finite-sized light spheres in turbulence. Paper presented at 15th European Turbulence Conference, ETC 2015, Delft, Netherlands.