Accelerations of large inertial particles in turbulence

Fan, Yaning; Wang, Cheng; Jiang, Linfeng; Sun, Chao; Calzavarini (Admin), Enrico

Document type :

Compte-rendu et recension critique d'ouvrage

DOI :

10.1209/0295-5075/ad2d15

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]

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 >

Language :

Anglais

Popular science :

Non

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