A dual-eddy EMMS-based turbulence model for laminar-turbulent transition prediction

作     者：Shuyu Guo Limin Wang Shuyu Guo;Limin Wang

作者机构：State Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China Innovation Academy for Green ManufactureChinese Academy of SciencesBeijing 100190China 

出 版 物：《Particuology》 (颗粒学报（英文版）)

年 卷 期：2021年第19卷第5期

页      面：285-298页

核心收录：

学科分类：08[工学] 080103[工学-流体力学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：financially supported by the National Key R&D Program of China(No.2018YFB1500902) National Numerical Wind Tunnel Project of China(No.NNW2020ZT1-A20) National Natural Science Foundation of China(Nos.51776212,91434113) Chinese Academy of Sciences(No.QYZDB-SSW-SYS029). 

主　　题：Turbulent flows Laminar-turbulent transition EMMS Turbulence model Multiscale structure 

摘      要：Turbulence is a century-old physics problem,and the prediction of laminar-turbulent transition remains a major challenge in computational fluid dynamics(CFD).This paper proposes a new conceptual multiscale-structure flow system consisting of a nonturbulent part and two types of turbulent eddies with different properties.The stability criterion for turbulent transition flows,based on the principle of compromise-in-competition between viscosity and inertia,is used to obtain model closure.The multiscale-structure concept and stability criterion are the characteristics of the dual-eddy energy-minimization multiscale(EMMS)-based turbulence model.The solved heterogeneous structure parameters and energy dissipation rate are analyzed,which reveal the laminar-turbulent transition process.To validate the dual-eddy EMMS-based turbulence model,three benchmark problems,namely,the transitional flows over the flat plate boundary layer with zero pressure gradient,NACA0012,and Aerospatiale-A airfoils,were simulated.The simulation was performed by combining the optimized results from the proposed model with the equations of the well-known κ-ω shear stress transfer(SST)turbulence model.The numerical results show that the dual-eddy EMMS-based turbulence model improves the prediction in the laminar-turbulent transition process.This demonstrates the soundness of using the multiscale-structure concept in turbulent flows to establish the turbulence transition model by considering the principle of compromise-in-competition between viscosity and inertia.