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Methodology for numerical simulations of ellipsoidal particle‐laden flows
Author(s) -
Lambert Baptiste,
Weynans Lisl,
Bergmann Michel
Publication year - 2020
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/fld.4809
Subject(s) - mechanics , ellipsoid , solver , particle (ecology) , range (aeronautics) , classical mechanics , torque , discrete element method , compressibility , physics , particle laden flows , lubrication , flow (mathematics) , stokes flow , suspension (topology) , two phase flow , mathematics , geology , aerospace engineering , engineering , mathematical optimization , oceanography , astronomy , thermodynamics , homotopy , pure mathematics
Summary Despite being relevant in many natural and industrial processes, suspensions of nonspherical particles have been largely underinvestigated compared with the extensive analyses made on the gravity‐driven motions of spherical particles. One of the main reasons for this disparity is the difficulty of accurately correcting the short‐range hydrodynamic forces and torques acting on complex particles. These effects, also known as lubrication, are essential to the suspension of the particles and are usually poorly captured by direct numerical simulation of particle‐laden flows. In this article, we propose a partitioned volume penalization‐discrete element method solver, which estimates the unresolved hydrodynamic forces and torques. Corrections are made locally on the surface of the interacting particles without any assumption on the particle global geometry. Numerical validations have been made using ellipsoidal particles immersed in an incompressible Navier‐Stokes flow.