Accelerations of large inertial particles ...
Document type :
Compte-rendu et recension critique d'ouvrage
DOI :
Title :
Accelerations of large inertial particles in turbulence
Author(s) :
Fan, Yaning [Auteur]
Tsinghua University [Beijing] [THU]
Wang, Cheng [Auteur]
Tsinghua University [Beijing] [THU]
Jiang, Linfeng [Auteur]
Tsinghua University [Beijing] [THU]
Sun, Chao [Auteur]
Tsinghua University [Beijing] [THU]
Calzavarini (Admin), Enrico [Auteur]
Unité de Mécanique de Lille - ULR 7512 [UML]
Tsinghua University [Beijing] [THU]
Wang, Cheng [Auteur]
Tsinghua University [Beijing] [THU]
Jiang, Linfeng [Auteur]
Tsinghua University [Beijing] [THU]
Sun, Chao [Auteur]
Tsinghua University [Beijing] [THU]
Calzavarini (Admin), Enrico [Auteur]
Unité de Mécanique de Lille - ULR 7512 [UML]
Journal title :
EPL - Europhysics Letters
Pages :
43001
Publisher :
European Physical Society / EDP Sciences / Società Italiana di Fisica / IOP Publishing
Publication date :
2024-02-26
ISSN :
0295-5075
HAL domain(s) :
Physique [physics]/Physique [physics]/Dynamique des Fluides [physics.flu-dyn]
English abstract : [en]
Understanding the dynamics of material objects advected by turbulent flows is a long standing question in fluid dynamics. In this perspective article we focus on the characterization of the statistical properties of ...
Show more >Understanding the dynamics of material objects advected by turbulent flows is a long standing question in fluid dynamics. In this perspective article we focus on the characterization of the statistical properties of non-interacting finite-sized massive spherical particles advected by a vigorous turbulent flow. We study the fluctuations and temporal correlations of particle accelerations and explore their behaviours with respect to both the particle size and the particle mass density by means of fully-resolved numerical simulations. We observe that the measured trends can not be interpreted as the simple multiplicative combination of the two dominant effects: the spatial filtering of fluid accelerations and the added-mass-adjusted fluid-to-particle density ratio. We argue that other hydrodynamical forces or effects (e.g. preferential flow sampling) have still a significant role even at the largest particle sizes, which are here of the order of the integral scale of turbulence.Show less >
Show more >Understanding the dynamics of material objects advected by turbulent flows is a long standing question in fluid dynamics. In this perspective article we focus on the characterization of the statistical properties of non-interacting finite-sized massive spherical particles advected by a vigorous turbulent flow. We study the fluctuations and temporal correlations of particle accelerations and explore their behaviours with respect to both the particle size and the particle mass density by means of fully-resolved numerical simulations. We observe that the measured trends can not be interpreted as the simple multiplicative combination of the two dominant effects: the spatial filtering of fluid accelerations and the added-mass-adjusted fluid-to-particle density ratio. We argue that other hydrodynamical forces or effects (e.g. preferential flow sampling) have still a significant role even at the largest particle sizes, which are here of the order of the integral scale of turbulence.Show less >
Language :
Anglais
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Non
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