Numerical study of heating transfer by natural convection in an inclined elliptical cylinder charged with nanofluid

Abstract

In this paper, thermal transfer with natural convection in a tilted annular cylinder with a Cu-water nanofluid has been numerically studied. The hot interior and cold exterior elliptical surfaces of the enclosure were maintained at constant temperatures Th and Tc , respectively. The governing equations were solved by the stream function-vorticity approach. The finite volume approach was utilized to discretise the controlling equations. The volume fraction range of the nanoparticles and the Rayleigh number was as follows: 0<ϕ<0.08 and 10^4

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带纳米流体的倾斜椭圆圆柱内自然对流换热的数值研究

本文对含cu -水纳米流体的倾斜环形圆柱内的自然对流换热进行了数值研究。在恒温Th和恒温Tc条件下，保持壳体内椭圆表面的热态和外椭圆表面的冷态。控制方程采用流函数涡度法求解。采用有限体积法对控制方程进行离散化。纳米颗粒的体积分数范围和瑞利数分别为:0<ϕ<0.08和10^4<Ra<10^6。倾角分别为γ=30°、45°和60°。结果给出等温等高线、流线、平均和局部努塞尔数。结果表明，无论纳米颗粒的大小如何，热传导率随倾斜角度的增加而增加。瑞利数越大、对流越多，壁面倾角对换热速率的影响越大。

本文章由计算机程序翻译，如有差异，请以英文原文为准。