NUMERICAL STUDY OF NATURAL CONVECTION IN AN INCLINED CAVITY WITH PARTIALLY ACTIVE SIDE WALLS FILLED WITH CU-WATER NANOFLUID
NUMERICAL STUDY OF NATURAL CONVECTION IN AN INCLINED CAVITY WITH PARTIALLY ACTIVE SIDE WALLS FILLED WITH CU-WATER NANOFLUID
复制标题
部分活性侧壁填充铜水纳米流体的倾斜腔内自然对流的数值研究
DOI：
10.5829/idosi.ije.2011.24.03b.08
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
R. Abdollahi
中科院分区：
文献类型：
--
作者：
G. Sheikhzadeh;A. Arefmanesh;M. Kheirkhah;R. Abdollahi
采用数值模拟方法，研究了浮力驱动下，具有部分主动侧壁的方腔内Cu-水纳米流体的流动与换热。腔的左侧壁和右侧壁的有源部分分别保持在温度Th和Tc，其中Th>Tc。外壳的顶壁和底壁以及其侧壁的非活动部分保持绝缘。采用有限体积法和混合格式对控制方程进行离散。使用开发的代码，进行了参数化研究和瑞利数的影响，侧壁的活动部分的位置，纳米颗粒的体积分数，和空腔的倾斜角度上的流体流动和换热的空腔内进行了调查。结果表明，纳米颗粒的平均努塞尔数随瑞利数和体积分数的增加而增加。此外，最大的平均努塞尔数发生在中间位置的热活性部分。
The buoyancy-driven fluid flow and heat transfer in a square cavity with partially active side walls filled with Cu-water nanofluid is investigated numerically. The active parts of the left and the right side-walls of the cavity are maintained at temperatures Th and Tc, respectively, with Th>Tc. The enclosure’s top and bottom walls, as well as, the inactive parts of its side walls are kept insulated. The governing equations are discretized using the finite volume method and the hybrid scheme. Using the developed code, a parametric study is undertaken and the effects of the Rayleigh number, the locations of the active parts of the side walls, the volume fraction of nanoparticles, and inclination angle of cavity on the fluid flow and heat transfer inside the cavity are investigated. It is observed from the results that the average Nusselt number increases with increasing both the Rayleigh number and the volume fraction of the nanoparticles. Moreover, the maximum average Nusselt number occurs for the middle-middle location of the thermally active parts.