Comparison of particle-resolved DNS (PR-DNS) and non-resolved DEM/CFD simulations of flow through homogenous ensembles of fixed spherical and non-spherical particles

被引：38

作者：

Kravets, B. ^{[1
]}

Schulz, D. ^{[1
]}

Jasevicius, R. ^{[2
]}

Reinecke, S. R. ^{[1
]}

Rosemann, T. ^{[1
]}

Kruggel-Emden, H. ^{[1
]}

机构：

[1] Tech Univ Berlin, Chair Mech Proc Engn & Solids Proc MVTA, Ernst Reuter Pl 1, D-10587 Berlin, Germany

[2] Vilnius Gediminas Tech Univ, Inst Mech Sci, J Basanavicius Str 28, LT-03224 Vilnius, Lithuania

来源：

ADVANCED POWDER TECHNOLOGY | 2021年 / 32卷 / 04期

关键词：

Direct numerical simulation (DNS); Lattice-Boltzmann method (LBM); Discrete element method (DEM); Computational fluid dynamics (CFD); Drag force; lift force and heat transfer; DIRECT NUMERICAL-SIMULATION; LATTICE-BOLTZMANN SIMULATIONS; SOLID HEAT-TRANSFER; SIMPLE CORRELATION FORMULA; DRAG FORCE CORRELATION; REYNOLDS-NUMBER; RANDOM ARRAYS; MASS-TRANSFER; FLUID-FLOW; PACKED-BEDS;

D O I：

10.1016/j.apt.2021.02.016

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Particle-unresolved Eulerian/Lagrangian simulations (DEM/CFD) of static homogenous particle ensembles are compared to direct numerical simulations (DNS) performed with the Lattice-Boltzmann method (LBM). Eliminating particles' motion, the accuracy of the CFD can be examined in a targeted way. Local quantities at the particle scale such as drag, lift and Nusselt numbers are thus evaluated in detail. In particular, the influence of particles' shape on numerical accuracy of the non-resolved DEM/CFD utilizing different correlations is studied. As particle shapes spheres, cylinders and cubes are examined applying the widely used multi-sphere method (MSM) for particle approximation. The simulations are conducted for two different exemplary voidages of epsilon = 0.6 and epsilon = 0.8 in the Reynolds number range of Re-p = 10 300 and the Prandtl number Pr = 1. The study reveals issues related to non-resolved DEM/CFD simulations especially in the case of non-spherical particles and provides important details for general DEM/CFD applications as well as for future closure derivations. (C) 2021 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.

引用

页码：1170 / 1195

页数：26

共 122 条

[21] THE VOIDAGE FUNCTION FOR FLUID PARTICLE INTERACTION SYSTEMS [J].