Heat transport in horizontally periodic and confined Rayleigh-Bénard convection with no-slip and free-slip plates  

作　　者：Maojing Huang Xiaozhou He 

机构地区：[1]School of Mechanical Engineering and Automation,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China

出　　处：《Theoretical & Applied Mechanics Letters》2022年第2期104-110,共7页力学快报（英文版）

基　　金：supported by the Natural Science Foundation of Guangdong Province(Grant No.2020A1515011094);the Science,Technology and Innovation Commission of Shenzhen Municipality(Grant No.KQJSCX20180328165817522).

摘　　要：We report the results of the direct numerical simulations of two-dimensional Rayleigh-Bénard convection(RBC)in order to study the influence of the periodic(PD)and confined(CF)samples on the heat transport Nu.The numerical study is conducted with the Rayleigh number(Ra)varied in the range 10^(6)≤Ra≤10^(9) at a fixed Prandtl number Pr=4.3 and aspect ratio Γ=2 with the no-slip(NS)and freeslip(FS)plates.There exists a zonal flow for Ra≥3×10^(6) with the free-slip plates in the periodic sample.In all the other cases,the flow is the closed large-scale circulation(closed LSC).The striking features are that the heat transport Nu is influenced and the temperature profiles do not be influenced when the flow pattern is zonal flow.

关 键 词：Rayleigh-Bénard convection Zonal flow Temperature profile TURBULENCE 

分 类 号：O35[理学—流体力学]