Two-dimensional numerical analysis is carried out in a square cavity with extended surface with nanofluid foe heat transfer enhancement under natural convection in a laminar flow regime. Pure water, ethylene glycol (EG), Water/EG mixture (20%, 40%, 60% and 80%) with aluminium oxide concentration of 3% inside a square cavity for a given fin length, position and different Rayleigh number (10³, 10⁴, 10⁵, 10⁶) is considered. Numerical analysis is carried out in Ansys Fluent using homogenous heat transfer model. It is observed that as the conductivity ratio and Rayleigh number increased resulting in higher surface temperature leading to heat transfer enhancement. Moreover, a fin position of 0.5 m height and 0.75 m length has been found to be the most optimal position for better heat transfer enhancement. Furthermore, it has been observed that the higher the conductivity ratio of the fin, the better is the heat enhancement.

二维数值分析在具有扩展表面的方形腔中进行，纳米流体在层流状态下的自然对流下增强传热。对于给定的翅片长度、位置和不同瑞利数（10 ³ , 10 ⁴ , 10 ⁵ , 10 ⁶） 被认为。数值分析是在 Ansys Fluent 中使用均质传热模型进行的。据观察，随着电导率比和瑞利数的增加，导致更高的表面温度，从而导致传热增强。此外，已发现 0.5 m 高和 0.75 m 长的翅片位置是更好地增强传热的最佳位置。此外，已经观察到翅片的导电率越高，热增强越好。