The performance of bilateral inclined solid and porous fins in natural convection within an H-shaped cavity with a hot bottom wall, cold vertical walls, and insulated horizontal walls are numerically investigated in this work. The key factors, namely Rayleigh number (Ra = 10³ − 10⁵), the porosity of fins (ε = 0 − 1), Darcy number (Da = 10⁻¹⁰ − 10⁻²), inclination angle of fins (α = 68^o,90^o,112^o), and the aspect ratio of the cavity (AR = 0.1, 0.2) are analyzed comprehensively in 180 cases. Porous zone governing equation and buoyancy force within the cavity are implemented by volume-average theory and Boussinesq approximation, respectively. A 60% enhancement in mean Nusselt number is observed in the presence of porous fins compared to the solid fins. The maximum Nusselt number is obtained by the perpendicular fins (α = 90^o) and the aspect ratio of (AR = 0.2). In addition, the fins with the Darcy numbers (Da < 10⁻⁶) behave like solid fins. Finally, two correlations between the significant parameters and average Nusselt number are presented.

在这项工作中，通过数值研究了在热底壁，垂直冷壁和水平隔热壁的H形腔内，自然对流中双侧倾斜的固体和多孔翅片的性能。关键因素，即瑞利数（镭 = 10 ³  - 10 ⁵），翼片的孔隙率（ε= 0 - 1），达西数（沓 = 10 ^-10  - 10 ^-2），翅片的倾斜角（α= 68 ^o，90 ^o，112 ^o）和腔体的纵横比（AR = 0.1，0.2）在180个案例中进行了综合分析。分别通过体积平均理论和Boussinesq逼近来实现多孔区域控制方程和空腔内的浮力。与固态散热片相比，在多孔散热片的存在下，平均努塞尔数提高了60％。最大Nusselt数由垂直鳍片（α= 90 ^o）和长宽比（AR  = 0.2）获得。另外，具有达西数（Da <10 ^-6）的鳍片的行为类似于实心鳍片。最后，给出了重要参数与平均努塞尔数之间的两个相关性。