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Modelling particle deposition of non-spherical particle mixtures in a channel flow by a fully-resolved CFD-DEM method
Citation key 2022_walterstrybnyhinkelmann
Author Leonie Walter, Jann Strybny and Reinhard Hinkelmann
Title of Book IUTAM Symposium: From Stokesian suspension dynamics to particulate flows in turbulence
Year 2021
Journal IUTAM Symposium: From Stokesian suspension dynamics to particulate flows in turbulence
Month Oct
Note Proceddings 23rd Numerical Towing Tank Symposium, Mühlheim an der Ruhr, Germany, 11-13 October, 2021, conference paper and oral presentation
Publisher IUTAM
Abstract A variety of different fluid-particle systems occur in the field of mechanical engineering, reaching from environmental to industrial to medical applications. To gain more insights into the movement of single particles in deposition processes, a particle mixture in a channel flow is modelled with a particle-resolving CFD-DEM (Computational Fluid Dynamics - Discrete Element Method) approach. It consists in coupling conventional computational fluid dynamical calculations by OpenFOAM, accounting for the temporal evolution of the flow related fields, to the DEM algorithm LIGGGHTS, tracking individual particle motion as well as particle collisions by solving Newtons equations of motion for translation and rotation. Our algorithm for fully-resolved superquadric particles is based on the CFDEMcoupling approaches of Hager et al. [1] and Podlozhnyuk et al. [2], who apply a fictitous domain method, though differing in force and voidfraction field calculation. So far grain-resolving methods applied in particle deposition processes commonly assume a spherical particle shape for simplicity. We proof, however, that stability and therefore deposition characteristics of particle mixtures is strongly influenced by particle shape [3] by placing different particle mixtures with equivalent initial conditions and coinciding individual particle volumes in a channel flow. Indeed the amount of entrained particles in the spherical cases exceed the number of deposited superquadric particles (cf. fig. 1). Individual particle velocities are effected enourmously. Additionally the development of the scour around a cylinder is investigated. [1] Kloss, Christoph & Goniva, Christoph & Hager, Alice & Amberger, Stefan & Pirker, Stefan Models, algorithms and validation for opensource DEM and CFD-DEM., Progress in Computational Fluid Dynamics. 12, 140–152 (2012). [2] Podlozhnyuk, Alexander & Pirker, Stefan & Klass, Christoph Efficient implementation of superquadric particles in Discrete Element Method within an open-source framework., Comp. Part. Mech. 4, 101–118 (2017). [3] Walter, Leonie & Strybny, Jann & Hinkelmann, Reinhard Simulating the transport of suspended superquadric shapes with a fully-resolved CFD-DEM algorithm., Proceedings Numerical Towing Tank Symposium (NuTTs). (2021).
Bibtex Type of Publication C
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