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首页> 外文期刊>International journal of numerical methods for heat & fluid flow >Free convection in a triangular cavity filled with a porous medium saturated by a nanofluid Buongiorno's mathematical model
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Free convection in a triangular cavity filled with a porous medium saturated by a nanofluid Buongiorno's mathematical model

机译：在充满纳米流体Buongiorno数学模型饱和的多孔介质的三角形空腔中的自由对流

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摘要

Purpose - Steady-state free convection heat transfer in a right-angle triangular porous enclosure filled by a nanofluid using the mathematical nanofluid model proposed by Buongiorno has been numerically analyzed. The paper aims to discuss this issue. Design/methodology/approach - The nanofluid model takes into account the Brownian diffusion and thermophoresis effects. The governing equations formulated in terms of the vorticity-stream function variables were solved by finite difference method. Findings - It has been found that the average Nusselt number is an increasing function of the Rayleigh and Lewis numbers and a decreasing function of Brownian motion, buoyancy-ratio and thermophoresis parameters. At the same time the average Sherwood number is an increasing function of the Rayleigh and Lewis numbers, Brownian motion and thermophoresis parameters and a decreasing function of buoyancy-ratio parameter. Originality/value - The present results are new and original for the heat transfer and fluid flow in a right-angle triangular porous enclosure filled by a nanofluid using the mathematical nanofluid model proposed by Buongiorno. The results would benefit scientists and engineers to become familiar with the flow behaviour of such nanofluids, and the way to predict the properties of this flow for possibility of using nanofluids in advanced nuclear systems, in industrial sectors including transportation, power generation, chemical sectors, ventilation, air-conditioning, etc.
机译：目的-使用Buongiorno提出的数学纳米流体模型，对由纳米流体填充的直角三角形多孔外壳中的稳态自由对流传热进行了数值分析。本文旨在讨论这个问题。设计/方法/方法-纳米流体模型考虑了布朗扩散和热泳效应。用有限差分法求解了由涡流函数变量构成的控制方程。发现-平均努塞尔特数是瑞利和刘易斯数的增加函数，而布朗运动，浮力比和热泳参数的减少函数。同时，平均舍伍德数是瑞利和刘易斯数，布朗运动和热泳参数的增加函数，以及浮力比参数的减少函数。原创性/价值-使用Buongiorno提出的数学纳米流体模型，对于纳米流体填充的直角三角形多孔外壳中的传热和流体流动，目前的结果是全新的和新颖的。该结果将有利于科学家和工程师熟悉此类纳米流体的流动行为，以及预测这种流动特性的方式，从而有可能在先进的核系统，交通运输，发电，化工等工业部门中使用纳米流体，通风，空调等

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