Experimental and numerical analyses of double diffusive natural convection heated and cooled from opposing vertical walls with an initial condition of a vertically linear concentration gradient
Experimental and numerical analyses of double diffusive natural convection heated and cooled from opposing vertical walls with an initial condition of a vertically linear concentration gradient
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在垂直线性浓度梯度初始条件下从相对垂直壁加热和冷却的双扩散自然对流的实验和数值分析
DOI：
10.1016/s0017-9310(05)80143-7
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发表时间：
1993
影响因子：
5.2
通讯作者：
H. Ozoe
中科院分区：
文献类型：
--
作者：
K. Kamakura;H. Ozoe
当具有垂直线性浓度梯度的溶液从垂直壁加热并从相对的垂直壁冷却时，观察到由几乎水平的尖锐界面分离的多层辊单元。采用Galerkin有限元法对这种双扩散对流进行了数值分析。计算了普朗特数Pr = 6，刘易斯数Le = 100，纵横比A = 4，瑞利数Ra = 106，浮力比N = 10或20。在数值模拟中，形成了具有尖锐且几乎水平界面的多层滚动单元，各层内的浓度变得几乎均匀。实验验证了数值结果。
When a solution having a vertically linear concentration gradient is heated from a vertical wall and cooled from an opposing vertical wall, multi-layered roll cells separated by almost-horizontal sharp interfaces are observed. A Galerkin finite element method was employed for the numerical analyses of this double diffusive convection. Computations were carried out for the Prandtl numberPr= 6, the Lewis numberLe= 100, an aspect ratioA= 4, the Rayleigh numberRa= 106and a buoyancy ratioN= 10 or 20. Multi-layered roll cells with sharp and almost-horizontal interfaces were formed in the numerical simulation and then the concentration in each layer became almost uniform. The experiment confirmed the numerical results.