Tumbling of Inertial Fibers in Turbulence

Anisotropic particles play a major role in many environmental and industrial turbulent flows. The modeling of their rotation dynamics is a fundamental challenge which has some important consequences in industrial processes, such as in the paper making industry. This study investigates the rotation r...

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Published in:Physical review letters 2018-09, Vol.121 (12), p.124502-124502, Article 124502
Main Authors: Bounoua, S, Bouchet, G, Verhille, G
Format: Article
Language:English
Subjects:
Computational fluid dynamics
Fluid mechanics
Mechanics
Physics
Rotation
Stokes number
Tumbling
Turbulence
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description Anisotropic particles play a major role in many environmental and industrial turbulent flows. The modeling of their rotation dynamics is a fundamental challenge which has some important consequences in industrial processes, such as in the paper making industry. This study investigates the rotation rate of neutrally buoyant fibers longer than the Kolmogorov length η_{K}. We show that the fiber inertia is at the origin of a decrease of the rotation rate. We propose a model which describes this phenomenon. We introduce also a new Stokes number which defines the limit of validity of the classical slender body approximation.
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source American Physical Society:Jisc Collections:APS Read and Publish 2023-2025 (reading list)
subjects Computational fluid dynamics
Fluid mechanics
Mechanics
Physics
Rotation
Stokes number
Tumbling
Turbulence
title Tumbling of Inertial Fibers in Turbulence
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