Natural convection near 4°C in a water saturated porous layer heated from below
Natural convection near 4°C in a water saturated porous layer heated from below
复制标题
从下方加热的水饱和多孔层中温度接近 4°C 的自然对流
DOI：
10.1016/0017-9310(84)90094-2
复制
发表时间：
1984
影响因子：
5.2
通讯作者：
D. Poulikakos
中科院分区：
文献类型：
--
作者：
K. R. Blake;A. Bejan;D. Poulikakos
本文报告了从下方加热并充满冷水的水平多孔层中二维自然对流的数值研究。水的密度最大值在 3.98°C 和大气压力下出现在层内部，因为顶面保持在 0°C，底面温度在 4 至 8°C 之间变化。三个独立系列的数值模拟记录了瑞利数、底部表面温度和多孔层的水平长度对垂直穿过该层的总传热率的影响。这些数值实验的范围为 200 <Rap< 10000、0.167 <H/L< 1 和 °C<TH< 8°C，其中 Rap、H/LandT 是密度最大的流体的达西修正瑞利数、高度/长度的几何比和底壁温度。数值结果与已发表的有关对流开始的线性稳定性结果一致。
This paper reports a numerical study of two-dimensional natural convection in a horizontal porous layer heated from below and saturated with cold water. The density maximum of water at 3.98°C and atmospheric pressure occurs inside the layer, as the top surface is maintained at 0°C and the bottom surface is varied from 4 to 8°C. Three separate series of numerical simulations document the effect of Rayleigh number, bottom surface temperature, and horizontal length of the porous layer on the overall heat transfer rate vertically through the layer. The range of these numerical experiments is 200 <Rap< 10000, 0.167 <H/L< 1 and °C<TH< 8°C, whereRap,H/LandTHare the Darcy-modified Rayleigh number for a fluid with density maximum, the geometric ratio height/length, and the bottom wall temperature. The numerical results agree with published linear stability results regarding the onset of convection.