Acceleration statistics of light particles in turbulence

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

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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


Conference14th European Turbulence Conference, ETC 2013
Abbreviated titleETC


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