摘要
采用格子Boltzmann方法对方腔内双扩散混合对流的非线性特性进行数值模拟.发热圆位于方腔中心,流体从方腔左侧底部流进,流出位置分别为顶部右侧、中间和左侧三种情况.结果表明,不同参数下的双扩散混合对流存在稳态定常解、周期性振荡解和非周期性振荡解,监测点速度相图分别表现为最终到达一个点、一个封闭环和没有规律的曲线.
Lattice Bohzmann method is adopted to numerically analyze nonlinear characteristics of double diffusive mixed convection in an enclosure. A heated cylinder is located at center of the enclosure. Fluid flows from an inlet at lower-left wall of enclosure and an outlet is at upper-right, upper-middle and upper-left wall respectively. Simulation results indicate that there are steady stationary solution, periodic and aperiodic oscillatory solutions in double diffusive mixed convection at different parameters. Phase path of velocity of monitoring point finally reaches a point, a closed loop and irregular curves, respectively.
出处
《计算物理》
CSCD
北大核心
2016年第2期156-162,共7页
Chinese Journal of Computational Physics
基金
国家自然科学基金(51276117)
上海市科委自然科学基金(12ZR1420900)资助项目
关键词
方腔
格子BOLTZMANN
双扩散混合对流
非线性
enclosure
lattice Boltzmann
double diffusive mixed convection
nonlinear characteristics
作者简介
李贝贝（1991-），女，河南，硕士研究生，主要从事传热传质及格子Boltzmann方法研究，E-mail：634451894@qq.com.
通讯作者：徐洪涛，副教授，E-mail：htxu@usst.edu．cn
