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首页> 外文期刊>Computational thermal sciences >ENHANCED MIXED CONVECTION AND HEAT TRANSFER BY NANOFLUID IN VENTILATED SQUARE ENCLOSURE INCLUDING TWO HEAT SOURCES
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ENHANCED MIXED CONVECTION AND HEAT TRANSFER BY NANOFLUID IN VENTILATED SQUARE ENCLOSURE INCLUDING TWO HEAT SOURCES

机译：包括两个热源的通风正方形外壳中纳米流体增强的混合对流和传热

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摘要

In the present study, enhanced mixed convection and heat transfer by nanofluid in a ventilated square enclosure including two heat sources was investigated numerically. The governing equations are solved using a second-order accurate finite volume approach with a staggered grid system. The classical projection method is used to handle the velocity-pressure coupling. The effects of monitoring parameters, namely, Richardson number, Reynolds number, and solid volume fraction on the streamline and isotherm contours as well as average Nusselt number along the two heat sources are carried out and discussed in based range for Reynolds number 10 ≤ Re ≤ 500, Richardson numbers 0.1 ≤ Ri ≤ 10, and the solid volume fraction 0 ≤ φ ≤ 0.1. The results show that by adding the nanoparticles to base fluid and increasing both Reynolds and Richardson number the heat transfer rate is enhanced. It is also found that, regardless of the Richardson number, Reynolds number, and the solid volume fraction of nanoparticles, the highest heat transfer enhancement occurs at the left heat source surface.
机译：在本研究中，在包括两个热源的通风方形外壳中，通过纳米流体增强了混合对流和传热的数值研究。控制方程使用交错网格系统的二阶精确有限体积法求解。经典投影方法用于处理速度-压力耦合。沿两个热源进行了监测参数（理查森数，雷诺数和固体体积分数）对流线和等温线轮廓以及平均努塞尔数的影响，并讨论了雷诺数10≤Re≤的基准范围500，理查森数0.1≤Ri≤10，固体成分分数0≤φ≤0.1。结果表明，通过将纳米粒子添加到基础流体中并同时增加雷诺数和理查森数，传热速率得以提高。还发现，不管理查森数，雷诺数和纳米颗粒的固体体积分数如何，最高的传热增强发生在左热源表面。

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