Abstract The objective of this paper is to examine the natural convection of the ventilation cavity filled with the Cu − Al2O3 − H2O hybrid nanofluid influenced by the effects of the magnetic field. The vertical heated baffle is fixed at the center of the ventilation cavity. The cavity walls are insulted. The opening ports are positioned diagonally at the vertical walls. The finite difference method is employed to solve the governing Navier stokes equations numerically. The computations are done with the Rayleigh number (104 − 106), Reynolds number (20,200,400), Hartmann number (0,20,50), nanoparticle solid volume fraction (0.0,0.03,0.06) and the width of the openings (0.10,0.20,0.30). The computed results are explained in the form of streamlines, isotherms and Nusselt numbers. The results show that the augmentation percentage of the hybrid nanofluid solid volume fraction enhances the heat transfer rate inside the cavity. Although, its performance depends on the other parameters too.

中文翻译：

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洛伦兹力对中心放置加热挡板的通风腔的影响，该挡板填充有 Cu - Al2O3 - H2O 混合纳米流体

摘要 本文的目的是研究填充有 Cu - Al2O3 - H2O 混合纳米流体的通风腔的自然对流受磁场影响的影响。垂直加热挡板固定在通风腔的中心。腔壁受到侮辱。开口位于垂直壁对角线上。采用有限差分法数值求解控制Navier stokes方程。计算使用瑞利数 (104 − 106)、雷诺数 (20,200,400)、哈特曼数 (0,20,50)、纳米粒子固体体积分数 (0.0,0.03,0.06) 和开口宽度 (0.10, 0.20,0.30）。计算结果以流线、等温线和努塞尔数的形式进行解释。结果表明，混合纳米流体固体体积分数的增加百分比提高了腔内的传热速率。虽然，它的性能也取决于其他参数。