Slip role for unsteady MHD mixed convection of nanofluid over stretching sheet with thermal radiation and electric field

• Published in: Indian journal of physics Vol. 94; no. 2; pp. 195 - 207
• Main Authors: Daniel, Yahaya Shagaiya, Aziz, Zainal Abdul, Ismail, Zuhaila, Bahar, Arifah, Salah, Faisal
• Format: Journal Article
• Language: English
• Published: New Delhi Springer India 01.02.2020; Springer Nature B.V
• Subjects: Astrophysics and Astroparticles; Chemical reactions; Computational fluid dynamics; Convection currents; Electric fields; Electrical resistivity; Energy dissipation; Finite difference method; Fluid flow; Heat transfer; Magnetic fields; Magnetic permeability; Magnetohydrodynamics; Mathematical models; Nanofluids; Nonlinear equations; Nonlinear systems; Ordinary differential equations; Organic chemistry; Original Paper; Partial differential equations; Physics; Physics and Astronomy; Radiative heat transfer; Slip; Stretching; Thermal conductivity; Thermal radiation; Two dimensional flow; Viscosity; Permeable/impermeable sheet; Electric field; Thermal radiation; Chemical reaction; 47.15.G; Magnetic nanofluid; 44.05.+e; 47.45.Gx; 47.10.ad; 81.16.Ta; 47.65.-d
• ISSN: 0973-1458; 0974-9845
• DOI: 10.1007/s12648-019-01474-y

This paper mainly focuses on the impacts of slip conditions on the two-dimensional unsteady mixed convection flow of electrical magnetohydrodynamic nanofluid over a stretching sheet in the presence of thermal radiation, viscous dissipation, and chemical reaction. The synchronized impacts of electric and magnetic fields on the momentum and energy fields using Buongiorno nanofluid model were introduced to enhance thermal conductivity and hence create more pathways to heat transfer performance of nanofluid. The highly nonlinear couple systems of partial differential equations were modeled as a set of nonlinear ordinary differential equations by using suitably defined transformations which are then solved by implicit finite difference scheme known as Keller box method. It was established that velocity has a direct opposite relationship with electric and magnetic fields. The velocity, temperature, and concentration profiles caused intense decay to velocity slip, thermal slip, and solutal slip, with permeability condition. Magnetic field enhances the nanofluid temperature intensely with impermeable medium resulting in a decrease in heat transfer rate from the surface. The heat convection current is strengthened by viscous dissipation and radiative heat transfer prevailing impermeability, which leads to a reduction in heat transfer rate. Comparisons with previously published works seen in the literature were made, and the result was found to be in excellent agreement.