Hybrid LES/URANS Simulation of Rayleigh-Bénard Convection Using BEM
作者机构：Faculty of Mechanical EngineeringUniversity of MariborSmetanova 17SI-2000 MariborSlovenia
出 版 物：《Computer Modeling in Engineering & Sciences》 (工程与科学中的计算机建模（英文）)
年 卷 期：2020年第123卷第4期
页 面：1-22页
核心收录：
学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）]
基 金：support from the Slovenian Research Agency(research core funding No.P2-0196)
主 题：Boundary-domain integral method hybrid LES-RANS turbulent fluid flow heat transfer Rayleigh-Bénard Convection
摘 要：In this paper,we develop and test a unified hybrid LES/URANS turbulence model with two different Large Eddy Simulation(LES)turbulence *** numerical algorithm is based on the Boundary Element *** the existing hybrid LES/URANS turbulence model we implemented a new Smagorinsky LES turbulence *** hybrid LES/URANS turbulence model is unified,which means that the LES/URANS interface is changed dynamically during simulation using a physical *** order to define the interface between LES and unsteady Reynolds Averaged Navier Stokes(URANS)zones during the simulation,we use the Reynolds number based on turbulent kinetic energy as a switching *** means that the flow characteristics define where the sub-grid scale or URANS effective viscosity and thermal conductivity are used in the governing equations in the next time *** unified hybrid turbulence models,only one set of governing equations is used for LES and URANS *** developed hybrid LES/URANS model was tested on non-isothermal,unsteady and turbulent Rayleigh-Bénard Convection and compared with an existing model,where LES is based on turbulent kinetic *** hybrid turbulence model was implemented within a numerical algorithm based on the Boundary-Domain Integral Method,where a single domain and sub-domain approaches were *** numerical algorithm uses governing equations written in a velocity-vorticity *** false transient time scheme is used for the kinematics equation.
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