当前位置: X-MOL 学术Case Stud. Therm. Eng. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Mixed convective transport in inclined porous open arc-shaped enclosures saturated by nanofluids using a second-order Boussinesq approximation
Case Studies in Thermal Engineering ( IF 6.8 ) Pub Date : 2021-07-29 , DOI: 10.1016/j.csite.2021.101295
Sameh E. Ahmed 1, 2 , Z.A.S. Raizah 1 , Ali Chamkha 3
Affiliation  

Numerical simulations are performed for the mixed convective transport in an inclined open arc-shaped channel filled by isotropic porous media using nanofluids. The Darcy regime is considered and the non-linear Boussinesq approximation (NBA) is applied for the mixture density. The vorticity-stream function scheme based on the finite volume method in case of the non-orthogonal grids is conducted to solve the dimensionless governing system of equations. The local thermal equilibrium model between the mixture and the porous medium is taken into account and water is considered as a base fluid while the Al2O3 is assumed as nanoparticles. The computations are carried out for various values of the curvature parameter ε ranging from 0.1 to 0.5, the Darcy number Da ranging from 102 to 105, the Rayleigh number ranging from 104 to 107, the Reynolds number Re ranging from 10 to 5×102, the inclination angle γ ranging from 0 to π2, the nonlinear Boussinesq parameter ξ ranging from 0 to 3 and the nanoparticles volume fraction is varied from 0 % to 4 %. The results reveal that an increase in the nonlinear Boussinesq parameter enhances the average Nusselt number regardless of the values of the inclination angle.



中文翻译:

使用二阶 Boussinesq 近似的纳米流体饱和的倾斜多孔开放弧形外壳中的混合对流传输

使用纳米流体对由各向同性多孔介质填充的倾斜开放弧形通道中的混合对流传输进行了数值模拟。考虑了达西制度,并且非线性 Boussinesq 近似 (NBA) 应用于混合密度。在非正交网格情况下,采用基于有限体积法的涡流函数方案求解无量纲控制方程组。考虑了混合物和多孔介质之间的局部热平衡模型,水被视为基液,而Al 2 O 3被假设为纳米粒子。对曲率参数的各种值进行计算ε 范围从 0.1 到 0.5,达西数 D一种 范围从 10-210-5,瑞利数从 104107, 雷诺数 Re 范围从 10 到 5×102,倾角 γ 范围从 0 到 π2, 非线性 Boussinesq 参数 ξ范围从 0 到 3,纳米颗粒的体积分数从 0 % 到 4 % 不等。结果表明,无论倾斜角的值如何,非线性 Boussinesq 参数的增加都会提高平均努塞尔数。

更新日期:2021-07-29
down
wechat
bug