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首页> 外文期刊>International Journal of Nanodimension >CFD analysis of natural convection heat transfer in a square cavity with partitions utilizing Al2O3 nanofluid
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CFD analysis of natural convection heat transfer in a square cavity with partitions utilizing Al2O3 nanofluid

机译：利用Al2O3纳米流体对带有分隔壁的方腔内自然对流换热进行CFD分析

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摘要

In the present study, natural convective heat transfer in a partitioned square cavity utilizing nanofluids is studied. The vertical left and right walls are considered as the hot and cold walls, respectively and the partitions assumed to be adiabatic. The nanofluid used in this study is Al2O3 with the volume fraction of 20%. It is assumed that nanofluid is a single phase fluid. FLUENT 6.3.26 is used to simulate the problem. The influence of different parameters such as Rayleigh number (Ra=105 and 107), height of partition (h=0.1, 0.3, 0.5H) at a fixed distance from the walls (d=0.3H) are studied. According to the results, Rayleigh number and height of the partition are important factors that extremely affect the streamlines and isotherms. At Ra=107, the flow is confined in the distance between walls and partitions. Furthermore, at high partitions, the isotherms are horizontal between two partitions. For a fixed amount of the partition height, Nusselt number increases as the Rayleigh number rises. On the other hand, for a fixed Rayleigh, with the increasing partition height, Nusselt number decreases along the hot wall.
机译：在本研究中，研究了利用纳米流体在分隔的方腔中的自然对流换热。垂直的左壁和右壁分别被视为热壁和冷壁，并且隔板被认为是绝热的。在这项研究中使用的纳米流体是Al2O3，其体积分数为20％。假设纳米流体是单相流体。 FLUENT 6.3.26用于模拟问题。研究了不同参数的影响，例如瑞利数（Ra = 105和107），距墙一定距离（d = 0.3H）的分隔高度（h = 0.1、0.3、0.5H）。根据结果​​，分隔壁的瑞利数和高度是影响流线和等温线的重要因素。在Ra = 107时，流量被限制在墙和隔板之间的距离内。此外，在高分区中，等温线在两个分区之间是水平的。对于固定的分隔高度，随着瑞利数的增加，努塞尔数会增加。另一方面，对于固定瑞利，随着分隔高度的增加，努塞尔特数沿热壁减小。

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