重力变调作用对Rayleigh-Benard对流的影响  

Influence of gravity modulation on Rayleigh-Benard convection

作　　者：张淑芸[1] 宁利中[1] 周倩[1] 李国栋[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：《水资源与水工程学报》2011年第2期40-43,共4页Journal of Water Resources and Water Engineering

基　　金：国家自然科学基金项目(10872164);陕西省重点学科建设专项资金;陕西省教育厅专项计划(09JK643)资助

摘　　要：Rayle igh-Benard对流是研究非平衡对流的斑图(pattern)及非线性动力学特性的典型模型之一。本文通过流体力学基本方程组的数值模拟研究了二维矩形腔体中重力变调作用对RB对流中的行进波的影响,进一步研究了对流斑图结构及其非线性特性。结果表明:对流参数的变化周期依赖于重力变调作用的周期。The Rayleigh-Benard flow is one of typical models for studying the patterns and nonlinear dynamics of nonequilibrium convection.By using a two-dimensional numerical simulation of the fully hydrodynamics equations,Rayleigh-Benard convection under gravity modulation in a rectangular channel was studied Further,pattern formations and nonlinear characteristics were discussed.The results indicated that the change period of convection characteristic parameters depend on the cycle of gravity modulation.

关 键 词：RAYLEIGH-BENARD对流 重力变调 斑图 

分 类 号：TV131[水利工程—水力学及河流动力学] O357[理学—流体力学]