Natural Convection in a Two-Dimensional Cell Filled with a Porous Medium: A Direct Numerical Simulation Study
Natural Convection in a Two-Dimensional Cell Filled with a Porous Medium: A Direct Numerical Simulation Study
复制标题
填充多孔介质的二维单元中的自然对流：直接数值模拟研究
DOI：
10.1080/01457632.2018.1432083
复制
发表时间：
2018
影响因子：
2.3
通讯作者：
Y. Jin
中科院分区：
文献类型：
--
作者：
P.U. Kränzien;Y. Jin
采用两种直接数值模拟方法对二维多孔介质单胞内的自然对流进行了研究。在下壁处加热池并在上壁处冷却池。浮力由Boussinesq近似建模。瑞利数的范围从50到20000。两种DNS方法的DNS结果表明Nu和Ra之间存在线性关系。然而，数值方法对小的流动结构有一定的影响。鱼骨结构清楚地确定了在靠近边界层的切片的温度的时空图。在鱼骨结构中可以观察到四种运动模式，分别为巨羽流和原羽流。根据DNS结果，研究了边界层中的特征长度、速度和温度尺度。
Natural convection in a two-dimensional cell filled with a porous medium was investigated using two direct numerical simulation (DNS) methods. The cell was heated at the lower wall and cooled at the upper wall. The buoyancy force was modeled by the Boussinesq approximation. The Rayleigh numbers ranged from 50 to 20, 000. The DNS results from both DNS methods indicate the linear relationship between Nu and Ra. However, the numerical methods have some effects on the small flow structures. The fish bone structures are clearly identified by the space-time plots of the temperature in a slice close to the boundary layer. Four motion patterns showing mega-plumes and proto-plumes can be observed in the fish bone structures. The characteristic length, velocity, and temperature scales in the boundary layer were studied based on the DNS results.
登录
查看更多内容
影响因子：
3.7
作者：
D. Hewitt;J. Neufeld;J. Lister
通讯作者：
J. Lister
DOI：
10.1080/15567030802087403
发表时间：
2009
期刊：
Energy Sources, Part A: Recovery, Utilization, and Environmental Effects
影响因子：
--
作者：
B. Basbug;F. Gumrah
通讯作者：
F. Gumrah
影响因子：
8.6
作者：
D. Hewitt;J. Neufeld;J. Lister
通讯作者：
D. Hewitt;J. Neufeld;J. Lister
影响因子：
4.6
作者：
M. Paoli;F. Zonta;A. Soldati
通讯作者：
M. Paoli;F. Zonta;A. Soldati
影响因子：
--
作者：
Daniel J. Keene;R. J. Goldstein
通讯作者：
Daniel J. Keene;R. J. Goldstein