Effects of hydromagnetic and chemical reaction over a stagnation point flow of horizontal stretching/shrinking cylinder in Ag-CuO/water hybrid nanofluid

Abstract

Purpose This paper aims to explore on stagnation point flow of Ag-CuO/water over a horizontal stretching/shrinking cylinder by adding the effect of chemical reaction, B together with the magnetic field, M. Design/methodology/approach A set of reduced ordinary differential equations from the governing equations of partial differential equations is obtained through similarities requirements. The resulting equations are solved using bvp4c in MATLAB2019a. The impact of various physical parameters such as curvature parameter, ϒ, chemical reaction rate, B, magnetic field, M and Schmidt numbers, Sc on shear stress, f′′0 local heat flux, -θ′(0) and mass transfer, -∅′(0) also for velocity, f′(η), temperature, θ(η) and concentration, ∅(η) profiles have been plotted and briefly discussed. In this work, some vital characteristics such as local skin friction, Cf, local Nusselt number, Nux and local Sherwood number, Shx are chosen for physical and numerical analysis. Findings The findings expose that the duality of solutions appears in a shrinking region ( ε < 0). The value of skin friction, heat transfer rate and mass transfer rate reduction for existing of M, but in contrary result obtain for larger ϒ, B and Sc. Furthermore, the hybrid nanofluid demonstrates better heat transfer compared to nanofluid. Practical implications The hybrid nanofluid has widened its applications such as in electronic cooling, manufacturing, automotive, heat exchanger, solar energy, heat pipes and biomedical, as their efficiency in the heat transfer field is better compared to nanofluid. Originality/value The findings on stagnation point flow of Ag-CuO/water over a horizontal stretching/shrinking cylinder with the effect of chemical reaction, B and magnetic field, M is new and the originality is preserved for the benefits of future researchers.

Stagnation Point Flow and Heat transfer of Hybrid Nanofluid over a Stretching/Shrinking Cylinder with Suction/Injection Effects

“…The numerical results are presented in both table and figures. Table 3 shows the relative values of reduced skin friction coefficient, 𝑓′′(0) when 𝜑 1 = 𝜑 2 = 0 and 𝑀 = 0 with several values of 𝜀, 𝛾 and 𝑃𝑟 = 6.2, which indicates a good correlation between the current results and the results obtained from the previous studies by Najib et al, [30] and Aladdin and Bachok [20]. Thus, it is assured that the present numerical method can be used confidently to solve the fluid flow and heat transfer of the current problem.…”

“…One of the previous studies, as mentioned, is Hayat and Nadeem [28] as the reference for the thermophysical properties of nanoparticles. The range of parameters is taken from the main reference for this study Aladdin and Bachok [20] the required (Ag-CuO/water) hybrid nanofluid with various volume fractions 𝜑 1 = 𝜑 2 = 0.1 is applied to achieve the objectives of this work. Therefore, the nanoparticles volume fraction 𝜑 values are in the range of 0 ≤ 𝜑 ≤ 0.3.…”

“…Numerical computation for 𝑓′′(0) when 𝜑 1 = 𝜑 2 = 𝑀 = 0 with several values of 𝜀, 𝛾 and 𝑃𝑟 = 6.2 Najib et al, [30] Aladdin and Bachok [20] Current Figures 2 and 3 show the effect of the volume fraction of nanoparticle, on reduced skin friction 𝑓′′(0) and reduced heat transfer −𝜃′(0). Both figures portray the result for three different types of fluid, which are viscous fluid (𝜑 1 = 𝜑 2 = 0), Ag/water nanofluid (𝜑 1 = 0.01, 𝜑 2 = 0) and Ag-CuO/water hybrid nanofluid (𝜑 1 = 𝜑 2 = 0.01).…”

“…It is widely used in various engineering applications such as wider absorption range, low pressure drops, generator cooling, nuclear system cooling, good thermal conductivity and heat exchangers. Aladdin and Bachok [20] investigated the silver-copper oxide/water stagnation point flow in the presence of effects of chemical reaction and magnetic field. Due to the decision to improve thermal efficiency, the exclusive behavior of hybrid nanofluids is actively emphasized.…”

Double diffusive MHD squeezing copper water nanofluid flow between parallel plates filled with porous medium and chemical reaction

“…In the literature survey presented here, more attention has been set on Porous medium and chemical reaction exposing the problems concerned to porous media that uses the Darcy's relation and chemical reaction. The mass transference influences on MHD oscillatory movement in a porous medium with radiation and chemical reaction were explored by many researchers, as in Ibrahim et al (2015), Sivasankaran et al (2017), Niranjan et al (2016, Adomian (1990), He (2006), He (2003) and Aladdin and Bachok (2022). The effect of magnetic parameter on the unsteady stagnation-point flow and the stability analysis of rear stagnation-point flow of a hybrid nanofluid are analysed by Zainal et al (2022a) and found that the efficiency of heat transfer is significantly impacted by the magnetic factor.…”