Acceleration statistics of light particles in turbulence

Vivek N. Prakash, Yoshiyuki Tagawa, Enrico Calzavarini, Julián Martínez Mercado, Federico Toschi, Detlef Lohse, Chao Sun

Research output: Contribution to conferencePaperAcademicpeer-review

Abstract

We report results from the first systematic Lagrangian experimental investigation in the previously unexplored regime of light (air bubbles in water, and rigid hollow spheres) and large particles (D/η >> 1) in turbulence [1]. Using a traversing camera setup and particle tracking, we study the Lagrangian acceleration statistics of ∼3 mm diameter (D) bubbles in a water tunnel with nearly homogeneous and isotropic turbulence generated by an active-grid. The Reynolds number (Reλ) is varied from 145 to 230, resulting in size ratios, D/η in the range of 7.3-12.5, where η is the Kolmogorov length scale. The experimental results are closely matched by numerical simulations of finite-size bubbles with the Faxén corrections. We also report preliminary results on light rigid spheres in turbulence.

Original languageEnglish
Publication statusPublished - 1 Jan 2020
Event14th European Turbulence Conference, ETC 2013 - Lyon, France
Duration: 1 Sep 20134 Sep 2013
Conference number: 14

Conference

Conference14th European Turbulence Conference, ETC 2013
Abbreviated titleETC
CountryFrance
CityLyon
Period1/09/134/09/13

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