Acceleration statistics of light particles in turbulence

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

Acceleration statistics of light particles in turbulence

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

Physics of Fluids

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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 (Re_λ) 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 language	English
Publication status	Published - 1 Jan 2020
Event	14th European Turbulence Conference, ETC 2013 - Lyon, France Duration: 1 Sept 2013 → 4 Sept 2013 Conference number: 14

Conference

Conference	14th European Turbulence Conference, ETC 2013
Abbreviated title	ETC
Country/Territory	France
City	Lyon
Period	1/09/13 → 4/09/13

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http://etc14.ens-lyon.fr/etc-14-proceedings/accepted-talks/

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title = "Acceleration statistics of light particles in turbulence",

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 Fax{\'e}n corrections. We also report preliminary results on light rigid spheres in turbulence.",

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T1 - Acceleration statistics of light particles in turbulence

AU - Prakash, Vivek N.

AU - Tagawa, Yoshiyuki

AU - Calzavarini, Enrico

AU - Mercado, Julián Martínez

AU - Toschi, Federico

AU - Lohse, Detlef

AU - Sun, Chao

N1 - Conference code: 14

PY - 2020/1/1

Y1 - 2020/1/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85081087385&partnerID=8YFLogxK

M3 - Paper

T2 - 14th European Turbulence Conference, ETC 2013

Y2 - 1 September 2013 through 4 September 2013

ER -

Acceleration statistics of light particles in turbulence

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Conference

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