Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session ZC02: Turbulence: Multiphase and Particle-Laden
12:50 PM–2:47 PM,
Tuesday, November 21, 2023
Room: Ballroom B
Chair: Federico Toschi, Eindhoven University of Technology
Abstract: ZC02.00006 : Multiscale analysis of inertial particle dynamics in turbulent flows using a tessellation-based method*
1:55 PM–2:08 PM
Presenter:
Thibault MAUREL OUJIA
(Institut de Mathematiques Marseille, Aix-Marseille University)
Authors:
Thibault MAUREL OUJIA
(Institut de Mathematiques Marseille, Aix-Marseille University)
Keigo Matsuda
(Japan Agency for Marine-Earth Science and Technology)
Kai Schneider
(Institut de Mathematiques Marseille, Aix-Marseille University)
We study three-dimensional direct numerical simulation data of isotropic turbulence with inertial particles considering seven different Stokes numbers and the influence of gravity. We apply a tessellation-based technique and thus assign a volume to each particle. The temporal rate of change of the volumes yields the divergence of the particle velocity (Maurel-Oujia et al., Â arXiv:2212.03580, 2023).
In addition, we perform a multiresolution analysis of the divergence on unstructured discrete particle positions (Matsuda et al., CTR Proc., 2022). The multiscale clustering dynamics can be assessed and the scales where the clustering formation and destruction are most active, can be determined depending on the Stokes number and the gravity.
*T. Maurel-Oujia acknowledges partial funding from JSPS, Short-Term Fellowship.K.Matsuda acknowledges partial financial support from JSPS KAKENHI Grant Numbers JP20K04298 and JP23K3686.T. Maurel-Oujia and K. Schneider acknowledge partial funding from the Agence Nationale de la Recherche, grant ANR-20-CE46-0010-01.
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