Thermo-solutal stratification and chemical reaction effects on radiative magnetized nanofluid flow along an exponentially stretching sensor plate: Computational analysis

Abstract

Motivated by emerging technologies in nanofluid electromagnetic sensor systems, a mathematical model is developed for free convective chemically reacting magnetized Buongiorno nanofluid flow along a stretching exponential Riga plate with dual (thermal and solutal) stratification. Additionally, the effects of radiative heat flux and thermal sink/generation are included. The non-dimensional boundary layer conservation equations are solved with the associated boundary constraints using the Keller Box finite difference scheme, and authentication with earlier studies is conducted. With increasing magnetization parameter, velocity is elevated whereas temperature is suppressed. Increasing Grashof number enhances velocity strongly near the sensor surface region but reduces it further towards the free stream. The heat transfer is depleted throughout the boundary layer regime with greater Grashof numbers. The thermal distribution is substantially boosted with increment in radiative flux, heat source, thermophoresis and Brownian motion parameters, whereas it is strongly decreased with increment in Prandtl numbers and thermal stratification. The nanoparticle concentration is markedly reduced with rising nanoparticle solutal stratification, Brownian motion parameter, reacting species term and Schmidt number. However, there is a considerable increment in nanoparticle concentration with high thermophoresis values. An increase magnetization parameter also elevates the drag force and wall heat transfer rate whereas it reduces the species gradient at the wall. With increasing chemical reaction, a weak rise in the wall friction and temperature gradient is noticed, but a significant rise is computed in Sherwood number.