首页|Discrete Boltzmann model with split collision for nonequilibrium reactive flows

Discrete Boltzmann model with split collision for nonequilibrium reactive flows

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
A multi-relaxation-time discrete Boltzmann model(DBM)with split collision is proposed for both subsonic and supersonic compressible reacting flows,where chemical reactions take place among various components.The physical model is based on a unified set of discrete Boltzmann equations that describes the evolution of each chemical species with adjustable acceleration,specific heat ratio,and Prandtl number.On the right-hand side of discrete Boltzmann equations,the collision,force,and reaction terms denote the change rates of distribution functions due to self-and cross-collisions,external forces,and chemical reactions,respectively.The source terms can be calculated in three ways,among which the matrix inversion method possesses the highest physical accuracy and computational efficiency.Through Chapman-Enskog analysis,it is proved that the DBM is consistent with the reactive Navier-Stokes equations,Fick's law and the Stefan-Maxwell diffusion equation in the hydrodynamic limit.Compared with the one-step-relaxation model,the split collision model offers a detailed and precise description of hydrodynamic,thermodynamic,and chemical nonequilibrium effects.Finally,the model is validated by six benchmarks,including multicomponent diffusion,mixture in the force field,Kelvin-Helmholtz instability,flame at constant pressure,opposing chemical reaction,and steady detonation.

discrete Boltzmann methodreactive flowdetonationnonequilibrium effect

Chuandong Lin、Kai H Luo、Huilin Lai

展开 >

Sino-French Institute of Nuclear Engineering and Technology,Sun Yat-sen University,Zhuhai 519082,China

Key Laboratory for Thermal Science and Power Engineering of Ministry of Education,Department of Energy and Power Engineering,Tsinghua University,Beijing 100084,China

Department of Mechanical Engineering,National University of Singapore,10 Kent Ridge Crescent,119260,Singapore

Department of Mechanical Engineering,University College London,Torrington Place,London WC1E 7JE,United Kingdom

School of Mathematics and Statistics,Key Laboratory of Analytical Mathematics and Applications(Ministry of Education),Fujian Key Laboratory of Analytical Mathematics and Applications(FJKLAMA),Center for Applied Mathematics of Fujian Province(FJNU),Fujian Normal University,350117 Fuzhou,China

展开 >

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaGuangdong Basic and Applied Basic Research FoundationGuangdong Basic and Applied Basic Research FoundationNatural Science Foundation of Fujian ProvinceNatural Science Foundation of Fujian ProvinceChina Scholarship CouncilOpen Research Fund of Key Laboratory of Analytical Mathematics and Applications(Fujian Normal University)Ministry of Education,ChinaUK Engineering and Physical Sciences Research Council under the project

U224221451806116914411202022A15150121162024A15150109272021J016522021J01655202306380288EP/X035875/1

2024

10.1088/1572-9494/ad4a36

理论物理通讯(英文版)
中国科学院理论物理研究所 中国物理学会

理论物理通讯(英文版)

CSTPCD
影响因子：0.333
ISSN：0253-6102
年,卷(期)：2024.76(8)