Thermal investigation of a moving longitudinal porous fin immersed in trihybrid nanofluid and exposed to a magnetic field: an adomian decomposition sumudu transform method approach

The present research investigates the convective and radiative heat transfer characteristics of a moving longitudinal porous fin. The study incorporates the influence of a magnetic field as a driving force for enhancing heat transfer in the system. To optimize heat transfer efficiency, a novel ternary hybrid nanofluid consisting of Ag, MgO and Au nanoparticles dispersed in water is utilized. The analysis employs the Adomian decomposition sumudo transfer method (ADSTM) as the semi-analytical approach, complemented by the numerical method of Runge–Kutta Fehlberg 4–5th (RKF-45) order for comparative analysis. Moreover, the application of fractional order ADSTM is explored to address non-dimensionalized ordinary differential equations (ODEs), and the findings are visually represented through graphical plots, showcasing the impact of various parameters on heat transfer performance and the superiority of the proposed ADSTM technique. The results show that trihybrid nanofluid outperforms both single-component and binary hybrid nanofluids in terms of temperature distribution and thermal efficiency. Importantly, the use of trihybrid nanofluid leads to a significant enhancement in the fin performance. The current findings indicate that a 400% increase in the Peclet number (Pe) leads to a 1.67% rise in the temperature from the base to the tip. Additionally, increasing the Hartmann number (\(H\)) by 400% results in a 16.34% decrease in the temperature from the base to the tip. This study holds significance for various engineering applications, enabling more efficient heat transfer in porous fin systems with potential for future advancements in the field.