Ramping Wall Boundary Analysis of Buoyant-Driven Convection Magnetohydrodynamics (MHD) Flow of B–H2O and Al2O3–H2O Nanofluid Past Vertical Edge in a Porous Zone

Abstract

An analysis is explored to study ramping wall velocity, temperature and concentration as well as isothermal case of a nanofluid flow, suspended boron and aluminium oxide nanoparticles in the seawater at 20°celcius influenced by magnetic and gravitational forces in a semi-infinite flow region using integral transform method. Thermal radiation and heat injection/suction are also investigated. Rosseland’s approximation is used for radiative heat flow in the energy equation, whereas Bousinessq’s approach is used in the momentum equation. Fluid temperature, species concentration, and transport are solved using Heaviside, exponential and complementary error functions; friction drag, heat and mass transfer rates are solved using Gaussian error functions. Temperature, transport and species concentration are graphically exhibited while the numerical calculations have been carried out for friction drag, rate of heat transmission and Sherwood number are performed for both the ramped wall and isothermal cases, and the effects of emerging parameters are tabulated and discussed. Higher radiation parameters lead to an increase in fluid temperature. The velocity boundary layer is lowered by the magnetic field and porous media parameters. The Nusselt number drops as Prandtl number, radiation parameter and volume fraction grows for both ramping and isothermal situations, whereas increases when time and heat source parameter increases.