具有水平流动的Rayleigh-Benard对流斑图  

Patterns of Rayleigh-Benard Convection with Horizontal Flow

作　　者：宁利中[1] 王永起[1] 周洋[1] 李开继 胡彪[1] 

机构地区：[1]西安理工大学水利水电学院,陕西西安710048

出　　处：《力学季刊》2016年第3期551-558,共8页Chinese Quarterly of Mechanics

基　　金：国家自然科学基金(10872164);陕西省重点学科建设专项资金项目(00X901)

摘　　要：本文利用数值模拟,探讨了普朗特数Pr=0.0272时有水平流动的Rayleigh-Benard对流结构.当水平流动强度Re=0时,发现定常对流的多重稳定性.当Re ≠0时,Rayleigh-Benard(RB)对流中存在三种对流斑图.它们的出现依赖于水平流动强度Re和相对瑞利数r.与Pr=6.99相比,在Pr=0.0272时的行波具有不同的动力学特性.Using a two-dimensional fluid mechanics numerical simulation, Rayleigh-Benard convection structure with horizontal flow at Prandtl number Pr =0.0272 is studied in this paper. For the horizontal flow Re =0, the multistability of the stationary overturning convection is found. Three types of convection patterns exist in Rayleigh-Benard（RB） convection with horizontal flow at Re ≠0. The appearance of the convection patterns depends on Re and reduced Rayleigh number r. The traveling waves at Pr =0.0272 have different dynamic characteristics when compared with those at Pr =6.99.

关 键 词：RAYLEIGH-BENARD对流 行波 局部行波 低普朗特数 波数 

分 类 号：O357[理学—流体力学]