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  • articleNo Access

    Radiative Heat Transfer and Thermo-Diffusion Effects in Chemically Reactive Magnetized Mixed Convective Flow of Gold Nanofluid

    Nano11 Feb 2025

    In this work, chemically reactive and mixed convective magnetized AuNF flow in a saturated porous medium inclined channel due to radiative heat transfer and thermo-diffusion/Soret effects is investigated. The prototype is designed and nondimensional partial differential equations are formulated and solved systematically. Also, the heat transfer rate for cylindrical-shaped gold nanoparticles (AuNPs) is evaluated and comparative analysis is done with other shapes (platelet, brick and blade) and previous studies. It is evaluated that the cylindrical shape of AuNPs within base fluid kerosene (C12H26C15H32) enhances the heat transfer capacity of conventional fluids. The transient velocity and concentration profile of AuNF also increased due to a rise in the thermo-diffusion effect, whereas an increase in magnetic field, volume fraction, inclination angle and chemical reaction suppressed the AuNF velocity profile. The elucidated prototype and found results are prominently useful in engineering applications, such as microchannel heat exchangers, advanced cooling in electronic devices, solar thermal systems, aerospace applications and various chemical processes in chemical industries.

  • articleNo Access

    The impact of slip mechanisms on the flow of hybrid nanofluid past a wedge subjected to thermal and solutal stratification

    This investigation aims to inspect the flow and thermal characteristics of hybrid nanoparticles under the effect of thermophoresis and Brownian motion. The hybrid nanofluid is formed by dispersing the silver nanoparticles into the base fluid composed of tungsten oxide and water. The resulting hybrid nanofluid is assumed to flow over a moving wedge. The wedge is a geometry that can be commonly seen in many manufacturing industries, moulding industries, etc., where friction creates more heat and cooling becomes a necessary process. This study currently focuses on such areas of the industries. In this regard, the flow expressions in the form of Partial Differential Equations (PDEs) are obtained by incorporating the modified Buongiorno’s model and using boundary layer approximations. The modified Buongiorno model helps us analyze the impact of volume fraction along with the slip mechanisms. Suitable transformations are used to achieve the nondimensional form of governing equations, and further, it transforms the PDE to Ordinary Differential Equation (ODE). The RKF-45 is used to solve the obtained ODE and the boundary conditions. Furthermore, graphic analysis of the solutions for fluid velocity, energy distributions and dimensionless concentration is provided. It was noted that the behavior of the Nusselt and Sherwood numbers was determined by analyzing numerous parameters. The conclusions show that they decrease with greater values of the stratification factors. Additionally, with higher values of the wedge parameter, the magnitude of the velocity field and the thermal boundary layer diminish.

  • articleNo Access

    Brownian motions and thermophoresis effects in a vertically stretching sheet with micropolar nanofluid flow

    This work is about the investigation of the flow of a micropolar nanoliquid over a stretching surface, taking into account the effects of thermal radiation, thermophoresis, and Brownian motion. The study focuses on the impact of these factors on heat and mass transfer rates, with the assumption that the Newtonian heat impact dominates. The homotropy approach is used to generate non-dimensional transformational parameters, which are then used to create a system of nonlinear differential equations. The study includes charts and tables that define transfer rates based on various parameters, and the results suggest that increased radiance levels and Nb parameters lead to improvements in heat and mass convection. The graphics used in the study are accurate and consistent with previous research in the field. Overall, this research provides insights into the complex dynamics of micropolar nanoliquid flow and the factors that impact heat and mass transfer in this system.