Flow and heat transfer over a permeable moving wedge in a hybrid nanofluid with activation energy and binary chemical reaction

Abstract

Purpose The analysis of boundary layers is needed to reflect the behaviour of fluid flows in current industrial processes and to improve the efficacy of products. Hence, this study aims to analyse the flow and heat transfer performance of hybrid alumina-copper/water (Al2O3-Cu/H2O) nanofluid with the inclusion of activation energy and binary chemical reaction effect towards a moving wedge. Design/methodology/approach The multivariable differential equations with partial derivatives are converted into a specific type of ordinary differential equations by using valid similarity transformations. The reduced mathematical model is elucidated in the MATLAB system by using the bvp4c procedure. This solution method is competent in delivering multiple solutions once appropriate assumptions are supplied. Findings The results of multiple control parameters have been studied, and the findings are verified to provide more than one solution. The coefficient of skin friction was discovered to be increased by adding nanoparticles volume fraction from 0% to 0.5% and 1%, by almost 1.6% and 3.2%. Besides, increasing the nanoparticles volume fraction improves heat transfer efficiency gradually. The inclusion of the activation energy factor displays a downward trend in the mass transfer rates, consequently reducing the concentration profile. In contrast, the increment of the binary reaction rate greatly facilitates the augmentation of mass transfer rates. There is a significant enhancement in the heat transfer rate, approximately 13.2%, when the suction effect dominates about 10% in the boundary layer flow. Additionally, the results revealed that as the activation energy rises, the temperature and concentration profiles rise as well. It is proved that the activation energy parameter boosts the concentration of chemical species in the boundary layer. A similar pattern emerges as the wedge angle parameter increases. The current effort aims to improve the thermal analysis process, particularly in real-world applications such as geothermal reservoirs, chemical engineering and food processing, which often encountered mass transfer phenomenon followed by chemical reactions with activation energy. Originality/value The present results are original and new for the study of flow and heat transfer over a permeable moving wedge in a hybrid nanofluid with activation energy and binary chemical reaction.

Thermal transport in nanofluid across a radiated permeable sheet with irreversible effects based on the shape of the particles

“…They reported that the rate of heat transfer increased with an increase in the volume fraction of nanoparticles. Zainal et al (2021) considered transport phenomena in an alumina-copper/water hybrid nanofluid and observed that an increase in the activation energy causes an increase in the temperature and concentration profiles. They proved that the concentration of chemical species increased with an increase in the parameter activation energy.…”

Significance of the inclined magnetic field on the water-based hybrid nanofluid flow over a nonlinear stretching sheet

“…Alqaeni et al [32] examined mathematically the flow of Casson fluid on a spinning disk using activation energy effects. Zainal et al [33] discussed the impact of activation energy on hybrid nanofluid flow over a moving wedge and exposed that with augmentation in activation energy factor there has been decline in mass transportation.…”

A numerical investigation of cross‐diffusion on magnetohydrodynamic Cu‐Al2O3/H2O hybrid nanofluid flow over a stretching sheet with chemical reaction

“…A HNF flow in a 3D rotating sheet due to a radially amalgamated reaction was examined by Ayub et al 29 Hossainy and Eid 30 experimentally studied the chemical reaction in thin films of HNF flow using the RKF method of order fourth to fifth. Authors in another research [31][32][33][34] have explored the impact of reaction and activation energy on HNFs with or without Darcy-Forchheimer flow. Their investigations highlight significant aspects related to aircraft technology, solar hybrid nanomaterial systems, and more.…”