Heat and mass transfer effect on an unsteady MHD radiative chemically reactive Casson fluid over a stretching sheet in porous medium

This study deals with the effect of electric force and magnetohydrodynamics (MHD) of the transient state on natural convection flow past an oscillating vertical plate. In addition to this, thermal radiation and porous media are also examined in the Casson fluid flow. The Poisson-Boltzmann equation is employed to show the electric potential character within the fluid region, which is put into a linear form by the implementation of Debye-Hückel linearization. It is possible to compute the precise solution to the governing equations using the Laplace transform approach. The expression of fluid velocity, fluid concentration, and temperature are exposed graphically, and numerical results for Nusselt and Sherwood numbers are also derived for vital pertinent flow constraints. Increasing electroosmosis parameters strongly boosts fluid velocity. The nonnegative values of the Helmholtz-Smoluchowski velocity highly induce the axial velocity and the negative value decelerates. With increasing radiation strength and Prandtl number, the fluid's temperature distribution diminishes. These more intricate electrokinetic rheological flows associated with electroosmotic separators, such as biomedical absorbers, are illuminated by these models.

Section: Validationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Impact of the electromagnetic flow of an MHD Casson fluid over an oscillating porous plate

Vijayaragavan

Bharathi²,

Prakash³

2022

“…The study of heat and mass transmission past a parabolic starting infinite vertical plate was discussed by Agrawal et al 1 Das et al 2 studied unsteady MHD chemically reactive double‐diffusive Casson fluid past a flat plate in a porous medium with heat and mass transfer. Heat and mass transfer effect on an unsteady MHD radiative chemically reactive Casson fluid over a stretching sheet in porous medium explained by Das et al 3 Kataria and Patel 4 investigated the influence of thermodiffusion and parabolic motion on MHD second‐grade fluid flow with ramped wall temperature and ramped surface concentration. Mahanta et al 5 analyzed effects on MHD Casson stagnation point flow with stability analysis over the stretching surface in the presence of slip velocity.…”

Section: Introductionmentioning

confidence: 99%

Aspects of parabolic motion of MHD fluid flow past a vertical porous plate with cross‐diffusion effects

Umamaheswar

Reddy

et al. 2022

In the presence of Soret and Dufour effects, a numerical analysis is performed for an unstable magnetohydrodynamics convective flow of parabolic motion with variable temperature and concentration.The finite-difference method is used to solve the set of nondimensional governing equations with boundary conditions numerically. Graphs are used to investigate the effect of various physical characteristics on flow quantities. Variations in skin friction, Nusselt number, and Sherwood number are also examined using tables for physical curiosity. This study is unique in that it takes into account changeable temperature as well as concentration with Soret and Dufour effects. The magnetic parameter, Prandtl number, heat source, radiation parameter, Schmidt number, and chemical reaction parameter show a significant increase in skin friction, whereas the Grashof number, modified Grashof number, permeability parameter, radiation absorption parameter, Dufour number, and Soret number show the opposite trend. As the Soret number rises, the concentration rises as well, whereas the opposite is true for the Schmidt number and the chemical reaction parameter. The current study is highly supported by previously published data that have been verified.

“…Alharbi et al 7 discussed the entropy generation of the MHD thermally radiative Eyring‐Powell fluid through an unstable oscillating porous stretchable surface. Das et al 8 examined the impact of Soret and variable heat absorption on unsteady chemically radiative MHD flows of the Casson fluid through a stretchable porous surface. Chamkha et al 9 investigated the entropy generation of the MHD mixed convective nanofluid flows in a gamma‐shaped porous cavity.…”

Section: Introductionmentioning

confidence: 99%

Mixed convection flows of tangent hyperbolic fluid past an isothermal wedge with entropy: A mathematical study

Reddy¹,

Gaffar²,

Khan

et al. 2020

The nonlinear, steady, and mixed convective boundary layer flow and heat transfer of an incompressible tangent hyperbolic non‐Newtonian fluid over an isothermal wedge in the presence of magnetic field are analyzed numerically using the implicit Keller‐Box finite‐difference technique. The entropy analysis due to MHD flow of a tangent hyperbolic fluid past an isothermal wedge and viscous dissipation is also included. The numerical code is validated with previous Newtonian studies available in the literature. Graphical and tabulated results are analyzed to study the behavior of the fluid velocity, temperature, concentration, shear stress, heat transfer rate, entropy generation number, and Bejan number for various emerging thermophysical parameters, namely Weissenberg number (We), power‐law index (n), mixed convection parameter (λ), pressure gradient parameter (m), Prandtl number (Pr), Biot number (γ), Hartmann number (Ha), Brinkmann number (Br), Reynolds number (Re), and temperature gradient (Π). It is observed that velocity, entropy, Bejan number, and surface heat transfer rate are reduced with the increase in the Weissenberg number, but temperature and local skin friction are increased. An increase in pressure gradient enhances velocity, entropy, local skin friction, and surface heat transfer rate, but reduces temperature and Bejan number. An increase in an isothermal power‐law index (n) is observed to increase velocity, Bejan number, and surface heat transfer rate, but it decreases temperature, entropy, and local skin friction. An increase in the magnetic parameter (Ha) is found to decrease temperature, entropy, surface heat transfer rate, and local skin friction, and it increases velocity and Bejan number. The research is applicable for coating materials in chemical engineering, for instance, robust paints, production of aerosol deposition, and water‐soluble solution thermal treatment.