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首页> 外文期刊>International journal of numerical methods for heat & fluid flow >Natural convection heat transfer augmentation in a partially heated and partially cooled square cavity utilizing nanofluids
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Natural convection heat transfer augmentation in a partially heated and partially cooled square cavity utilizing nanofluids

机译：利用纳米流体在部分加热和部分冷却的方腔中自然对流传热的增加

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Purpose - The purpose of this paper is to investigate the behaviour of nanofluids numerically insiderna partially heated and partially cooled square cavity to gain insight into heat transfer and flowrnprocesses induced by a nanofluid.rnDesign/methodology/approach - A model is developed to analyze the behaviour of nanofluidsrntaking into account the solid volume fraction x. The transport equations are solved numerically withrnfinite volume approach using SIMPLEC algorithm.rnFindings - Comparisons with previously published work on the basis of special cases are performedrnand found to be in excellent agreement. Five different relative positions of the active zones arernconsidered.While circulation depend strongly on the total exit length. Governing parameters werern10~3 < Gr < 10~7 but due to space constraints the results for 10~4 < Gr < 10~7 are presented. It is foundrnthat both the Grashof number and solid volume fraction x affect the fluid flow and heat transfer inrnthe cavity. CopperWater nanofluid is used with Pr = 6.2 and solid volume fraction is varied as 0, 4, 8,rn12, 16 and 20 per cent. Detailed results are presented for flow pattern and heat transfer curves.rnOriginality/value - The present study focusses on the analysis of several parameters on the heatrntransfer characteristics of nanofluids within the enclosure.
机译：目的-本文的目的是从数值上研究部分加热和部分冷却的方腔内部的纳米流体的行为，以了解由纳米流体引起的传热和流动过程.rn设计/方法/方法-建立了一个模型来分析行为考虑到固体体积分数x。使用SIMPLEC算法以有限体积法对输运方程进行数值求解。研究发现-在特殊情况下与先前发表的工作进行了比较，发现它们之间具有极好的一致性。考虑了活动区的五个不同相对位置。而循环在很大程度上取决于总出口长度。控制参数为rn10〜3

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