Assessment of numerical methods for fully resolved simulations of particle-laden turbulent flows 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Computers & Fluids
年/卷/期
2019 / 179 /
页码
1-14
ISSN号
0045-7930
作者单位
Univ Toulouse, IMFT, CNRS, Toulouse, France;Delft Univ Technol, Lab Aero & Hydrodynam, Delft, Netherlands;Univ Aberdeen, Sch Engn, Aberdeen, Scotland;Univ Delaware, Dept Mech Engn, Newark, DE 19716 USA;Univ Delaware, Dept Mech Engn, Newark, DE 19716 USA;Delft Univ Technol, Lab Aero & Hydrodynam, Delft, Netherlands;Univ Toulouse, IMFT, CNRS, Toulouse, France;Univ Paris Est Marne la Vallee, Lab Modelisat & Simulat Multi Echelle MSME, CNRS, Marne La Vallee, France;Univ Toulouse, IMFT, CNRS, Toulouse, France;Univ Toulouse, IMFT, CNRS, Toulouse, France;Univ Toulouse, CNRS, CALMIP, Toulouse, France;Univ Toulouse, CNRS, CALMIP, Toulouse, France;
作者
de Motta, J. C. Brandle;Costa, P.;Derksen, J. J.;Peng, C.;Wang, L-P;Breugem, W-P;Estivalezes, J. L.;Vincent, S.;Climent, E.;Fede, P.;Barbaresco, P.;Renon, N.;
摘要
During the last decade, many approaches for resolved-particle simulation (RPS) have been developed for numerical studies of finite-size particle-laden turbulent flows. In this paper, three RPS approaches are compared for a particle-laden decaying turbulence case. These methods are, the Volume-of-Fluid Lagrangian method, based on the viscosity penalty method (VoF-Lag); a direct forcing Immersed Boundary Method, based on a regularized delta function approach for the fluid/solid coupling (IBM); and the Bounce Back scheme developed for Lattice Boltzmann method (LBM-BB). The physics and the numerical performances of the methods are analyzed. Modulation of turbulence is observed for all the methods, with a faster decay of turbulent kinetic energy compared to the single-phase case. Lagrangian particle statistics, such as the velocity probability density function and the velocity autocorrelation function, show minor differences among the three methods. However, major differences between the codes are observed in the evolution of the particle kinetic energy. These differences are related to the treatment of the initial condition when the particles are inserted in an initially single-phase turbulence. The averaged particle/fluid slip velocity is also analyzed, showing similar behavior as compared to the results referred in the literature. The computational performances of the different methods differ significantly. The VoF-Lag method appears to be computationally most expensive. Indeed, this method is not adapted to turbulent cases. The IBM and LBM-BB implementations show very good scaling. (C) 2018 Elsevier Ltd. All rights reserved.
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关键词/主题词
Particle-laden flows;Finite-size particles;Turbulence;Direct numerical simulations;
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