Free convection enhancement in an annulus between horizontal confocal elliptical cylinders using hybrid nanofluids
Free convection enhancement in an annulus between horizontal confocal elliptical cylinders using hybrid nanofluids
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DOI：
10.1080/10407782.2016.1230423
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发表时间：
2016-01-01
影响因子：
2
通讯作者：
Chamkha, Ali J.
中科院分区：
文献类型：
--
作者：
Tayebi, Tahar;Chamkha, Ali J.
本文对两个共焦椭圆柱之间填充Cu-Al_2 O_3/水混合纳米流体的环形空间内的自然对流进行了数值研究。内筒在恒定的表面温度下加热，而外壁等温冷却。基本方程在椭圆坐标系中进行了推导，并采用无量纲形式的涡量-流函数方程对二维层流和不可压缩流进行了定常求解。控制方程离散使用有限体积法和解决的内部FORTRAN代码。对不同体积分数的纳米颗粒（0
In the present paper, natural convection in an annulus between two confocal elliptic cylinders filled with a Cu-Al2O3/water hybrid nanofluid is investigated numerically. The inner cylinder is heated at a constant surface temperature while the outer wall is isothermally cooled. The basic equations are formulated in elliptic coordinates and developed in terms of the vorticity-stream function formulation using the dimensionless form for 2D, laminar and incompressible flow under steady-state condition. The governing equations are discretized using the finite volume method and solved by an in-house FORTRAN code. Numerical simulations are performed for various volume fractions of nanoparticles (0