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首页> 外文期刊>Heat Transfer Research >MIXED CONVECTION AND ENTROPY GENERATION IN A LID-DRIVEN CAVITY FILLED WITH A HYBRID NANOFLUID AND HEATED BY A TRIANGULAR SOLID
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MIXED CONVECTION AND ENTROPY GENERATION IN A LID-DRIVEN CAVITY FILLED WITH A HYBRID NANOFLUID AND HEATED BY A TRIANGULAR SOLID

机译：混合对流和熵生成在盖子驱动的腔内，填充有杂交纳米流体并被三角固体加热

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摘要

The use of a hybrid nanofluid is a new strategy of heat transfer enhancement. It is composed of more than one type of nanoparticles suspended in a base fluid. The present study investigates the mixed convection and entropy generation of a Cu-Al2O3-water hybrid nanofluid inside a lid-driven cavity heated by a triangular solid and cooled isothermally from the right vertical wall. The top wall moves in aiding or opposing directions. The studied pertinent parameters are: the thermal conductivity ratio of the triangular solid wall to the base fluid (Kr = 0.44, 1, 23.8), the Richardson number (Ri = 0.01, 1, 10), and the volume fraction of the hybrid and familiar nanofluids (phi, phi(Cu), phi Al2O3= 0.0-5%). The Prandtl number is fixed at 6.26, and the thickness of the solid wall, at 0.5. A uniform up-wind scheme finite difference method is used for numerical solution. The results have shown that the hybrid nanofluid strategy promises in improvement of the economic aspect by reducing the quantity of high thermal conductivity nanoparticles, which usually are more expensive.
机译：杂交纳米流体的使用是一种新的传热增强策略。它由悬浮在基础液中的一种以上的纳米颗粒组成。本研究研究了Cu-Al2O3-水杂化纳米流体内的混合对流和熵产生在通过三角形固体加热的盖子驱动的腔内内的Cu-Al2O3-水杂交纳米流体并从右垂直壁上冷却等温。顶壁在辅助或反对方向上移动。所研究的相关参数是：三角形实心壁与基础流体的导热率比（KR = 0.44,13.8），Richardson号（RI = 0.01,10）和杂种的体积分数和熟悉的纳米流体（PHI，PHI（Cu），PHI Al2O3 = 0.0-5％）。 Prandtl号码在6.26处固定，固体壁的厚度为0.5。一种统一的上风方案有限差分方法用于数值溶液。结果表明，杂交纳米流体策略通过减少通常更昂贵的高导热纳米颗粒的量来改善经济方面。

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