Flow and heat transfer for MHD wall jet of hybrid nanofluids: theoretical and numerical solutions

• Published in: International journal of numerical methods for heat & fluid flow Vol. 33; no. 7; pp. 2649 - 2670
• Main Authors: Mahros, Amr M., Aly, Emad H., Merkin, John H., Pop, Ioan M.
• Format: Journal Article
• Language: English
• Published: Bradford Emerald Publishing Limited 19.05.2023; Emerald Group Publishing Limited
• Subjects: Biot number; Boundary conditions; Boundary layers; Boundary value problems; Chebyshev approximation; Differential equations; Fluid flow; Fluids; Heat conductivity; Heat transfer; Investigations; Magnetic field; Magnetic fields; Magnetohydrodynamics; Matrix methods; Nanofluids; Nanoparticles; Nonlinear differential equations; Ordinary differential equations; Partial differential equations; Suction; Thermal boundary layer; Velocity; Viscosity; Wall jets; Suction; Moving surface; MHD; Wall jet; Convective; Hybrid nanofluid
• ISSN: 0961-5539; 1758-6585; 0961-5539
• DOI: 10.1108/HFF-09-2022-0555

Purpose This paper aims to study the magnetohydrodynamic (MHD) wall jet of a hybrid nanofluid flow over a moving surface with a thermally convective surface, wall moving with suction/injection. Design/methodology/approach On using appropriate similarity transformations, the governing equations that describe the model are converted into a system of nonlinear ordinary differential equations. These equations are solved both analytically and numerically using standard two-point boundary-value problem solvers and Chebyshev pseudospectral differentiation matrix method, respectively. Findings These results show that the HNF is heating/cooling with growth of the positive/negative values of the parameter measuring the velocity of the moving surface. The temperature distributions increase, where the thermal boundary layer gets thicker, as the magnetic field strengthens and with an increase in the absolute value of the Biot number. Originality/value The current findings for the HNFs are new and original. They generalize successfully the problems investigated previously by different researchers for the cases of fluids and also nanofluids.