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The industrial sector has shown a growing interest in hybrid nanofluids affected by magnetohydrodynamics (MHD) owing to their wide range of applications, including photovoltaic water heaters and scraped surface heat exchangers. The main purpose of this study is to look at how entropy is created in a hybrid nanofluid of |${\rm{A{{l}_2}{{O}_3}{-}Cu}}$| mixed with |${\rm{{{H}_2}O}}$| at a non-axisymmetric stagnation point flow with Joule heating and viscous dissipation. By using appropriate non-similarity transformations, the partial differential equations (PDEs) governing the boundary layer region of this issue are transformed into a set of non-linear PDEs. The BVP4c MATLAB program, which uses local non-similarity and additional truncation, may fix the problem. The velocity profiles in both directions grow when the values of |${{\phi }_2},\ M,\lambda $|⁠ , and A parameters increase. The temperature profile rises as the values of A and |$Ec$| grow and lowers as |${{\phi }_2}$| and M increase. The obtained numerical findings demonstrate significant impacts on both the heat transfer rate and fluid flow parameters of the hybrid nanofluid. When the concentration of nanoparticles and the magnetic parameter are heightened, there is an enhancement seen in the skin friction coefficient and decline in heat transfer rate. In addition, the entropy production profile shows an increasing tendency as a function of the parameters |${{\phi }_2},\ M,$| and |$Br,$| while demonstrating a decreasing tendency of function of the parameter |$\alpha $|⁠. The Bejan number profile has a positive correlation with the parameter |$\alpha $| but shows a negative correlation with the variables |${{\phi }_2},\ M,$| and |$Br$|⁠. [ABSTRACT FROM AUTHOR]

The fluids flow containing nano size particles is essential in industrial applications, especially in nuclear cooling system and nuclear reactor to increase the energy performance. In connection to this, a trihybrid Ellis rotating nanofluid flow through a stretching surface for increasing the heat transportation is presented. By suspending three different types of nano size particles the trihybrid nanofluid is formed with distinct chemical and physical connection into base liquid. In this article, the nano size particles TiO2,MgO${\mathrm{Ti}}{{{\mathrm{O}}}_{\mathrm{2}}}{\mathrm{,}}\,{\mathrm{MgO}}$, and CoFe2O4${\mathrm{CoF}}{{{\mathrm{e}}}_{\mathrm{2}}}{{{\mathrm{O}}}_{\mathrm{4}}}$ are mixed in H2O${{{\mathrm{H}}}_{\mathrm{2}}}{\mathrm{O}}$ (water). This type of mixture helps in degradation of noxious substances, cleaning environmental and many other appliances that requires the cooling effect. In addition, the linear thermal radiation is also considered. The governing equations of the flow and fluid temperature are minimized to ordinary differential equations and these equations are solved by Runge Kutta order fourth (RK45) approach. The approximate results are analyzed via graphs and the results reveal that thermal conductivity of trihybrid nano type fluid is more valuable as compared to hybrid and single nanofluid. Higher values of magnetic and rotational parameter have aggrandized the fluid temperature and opposite trend has observed for Ellis and thermal stratification parameter. Moreover, the results are compared with previous literature and found an excellent agreement. [ABSTRACT FROM AUTHOR]