This paper examines the impact of hybrid nanoparticles on the stagnation point flow towards a curved surface. Silica (SiO₂) and alumina (Al₂O₃) nanoparticles are added into water to form SiO₂-Al₂O₃/water hybrid nanofluid. Both buoyancy-opposing and -assisting flows are considered. The governing partial differential equations are reduced to a set of ordinary differential equations, before being coded in MATLAB software to obtain the numerical solutions. Findings show that the solutions are not unique, where two solutions are obtained, for both buoyancy-assisting and -opposing flow cases. The local Nusselt number increases in the presence of the hybrid nanoparticles. The temporal stability analysis shows that only one of the solutions is stable over time.

中文翻译：

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在具有浮力效应的混合纳米流体中流向曲面的停滞区域

本文研究了混合纳米粒子对流向曲面的驻点流的影响。二氧化硅（SiO ₂）和氧化铝（Al ₂ O ₃）纳米颗粒加入水中形成SiO ₂ -Al ₂ O ₃/水混合纳米流体。浮力反流和浮力辅助流都被考虑。控制偏微分方程被简化为一组常微分方程，然后在MATLAB软件中编码以获得数值解。研究结果表明，对于浮力辅助和反流两种情况，这些解决方案并不是唯一的，其中获得了两个解决方案。在混合纳米粒子的存在下，局部努塞尔数增加。时间稳定性分析表明，只有一种解决方案随着时间的推移是稳定的。