应用数学和力学2017，Vol.38Issue(10)：1103-1111,9.DOI:10.21656/1000-0887.370314
水平来流对扰动成长和对流周期性的影响
Effects of Horizontal Flow on Perturbation Growth and Convection Periodicity
摘要
Abstract
Numerical simulation of the 2D fully hydrodynamic equations for the pure fluid in a rectangular channel with horizontal flow for Prandtl number Pr = 0.0272 was conducted. Growth and spatiotemporal evolution of the 1D traveling wave patterns in the Rayleigh-Benard convec-tion of the pure fluid were investigated. It is found that the convective growth process can be di-vided into 3 stages:the development stage, the exponential growth stage and the periodic varia-tion stage. Through analysis on the variation of the maximum vertical velocity field with time for different relative Rayleigh numbers Rar in the exponential growth stage, a formula of variation of linear growth rateγm was obtained with respect to Rar . Furthermore, the traveling wave con-vection periodicity and its dependence on the horizontal flow Reynolds number were revealed.关键词
Rayleigh-Benard对流/成长率/时空斑图/周期性Key words
Rayleigh-Benard convection/growth rate/spatiotemporal pattern/periodicity分类
数理科学引用本文复制引用
胡彪,宁利中,宁碧波,田伟利,吴昊,宁景昊..水平来流对扰动成长和对流周期性的影响[J].应用数学和力学,2017,38(10):1103-1111,9.基金项目
国家自然科学基金(10872164) （10872164）
陕西省重点学科建设专项资金资助项目(00X901) The National Natural Science Foundation of China(10872164) （00X901）
