Effect of thermal radiation on an unsteady MHD flow over an impulse vertical infinite plate with variant temperature in existence of Hall current

In this study, we investigate the heat and mass transfer in MHD convective flow past an infinite plate, through a porous media in presence of radiation, diffusion-thermo effect, and heat sink. A uniform magnetic field is applied transversely in the fluid region. The novelty of the present work is to analyze the diffusion-thermo effect on the flow phenomena in the presence of heat sink and thermal radiation. The governing equations are solved by perturbation technique to get expressions for velocity, temperature, and concentration fields. The influence of various physical quantities on the flow domain is studied graphically and in tabular form. It has been found that when heat flux is generated due to temperature gradient, the fluid velocity increases whereas the fluid temperature falls due to the diffusion-thermo effect. The current results have been compared with the existing results in some cases and it has been found that the findings of the present study are consistent with earlier findings.

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Diffusion‐thermo effect on MHD dissipative flow past a porous vertical plate through porous media

Choudhury

Agarwalla²,

Ahmed

2022

“…Omamoke et al 31 explore the effects of radiation, viscous dissipation, and heat source on the magneto‐hydrodynamic free convection flow of a viscous incompressible fluid over an inclined porous plate. Appidi et al 32 studied about effect of thermal radiation on an unsteady MHD flow over an impulse vertical infinite plate with variant temperatures in the existence of hall current. Mixed convection flow with micropolar fluid in the presence of a magnetic field is addressed by Patel and Patel 33 .…”

Section: Introductionmentioning

confidence: 99%

Effects of chemical reaction and thermal radiation on MHD free convective flow of micro polar fluid past an infinite moving vertical porous plate with viscous dissipation

Appidi¹,

Kumar²,

Matta³

et al. 2023

Self Cite

This article discusses the impact of chemical reaction and radiation on an unstable two‐dimensional laminar flow around a viscous fluid over a semi‐infinite, vertical absorbent surface that moves progressively. The governing classification of partial differentiation was converted into an ordinary differentiation system in this case. To get numerical solutions, the Galerkin finite element technique is applied to nondimensional velocity, micro‐rotation, temperature, and concentration profiles. The consequences of skin friction, the combined pressure quantity, the mass, and heat assignments at the boundary are formed using different fluid properties and flow conditions. Physical quantities and their effects Graphs depict the radiation parameter R, thermal conductivity k, Eckert number Ec, and other velocities, micro‐rotation, temperature, and concentration factors. The main findings of this current problem is showing the chemical reaction effects on velocity and concentration. It is observed that both the velocity and concentration of the fluid decrease when Kr increases.

“…Khalili et al 25 examined the impact of radiation and chemical reaction on the flow of MHD through an exponential stretched sheet incorporating heat sink. Appidi et al 26 have inspected the impact of thermal radiation on the incompressible, viscous, electrically conducting unsteady MHD flow through an upright plate that is oscillating suddenly. Ahmed et al 27 and Ahmed 28 investigated the consequences of heat sink and chemical reaction on MHD flow.…”

Section: Introductionmentioning

confidence: 99%

MHD dissipative flow past a permeable vertical plate in a porous medium in the presence of constant heat, mass flux, and diffusion‐thermo effect

Khanam,

Ahmed

2023

An analytical study of heat and mass transport in magnetohydrodynamic convective flow over an indefinitely long porous plate, which is vertically immersed in the porous medium, is investigated when heat sink, diffusion‐thermo, and thermal radiation are present. A magnetic field with uniform strength has been applied transversely directed into the fluid region. Analysis of diffusion‐thermo impact within the flow problem with constant heat and constant mass flux in the presence of thermal radiation and heat sink is the novelty of the current work. By using the Eckert number E as the perturbation parameter, the regular perturbation approach is used to solve nondimensional governing equations. On the flow and transport characteristics, the effects of Prandtl number, Grashof number, Eckert number, Dufour number, Schmidt number, radiation, magnetic field, and heat sink parameter have been investigated graphically and in tabular form, respectively. The innovative aspect of the current study is the inclusion of the Dufour effect, in addition to constant heat and mass flux at the plate. The Dufour effect can be utilized to improve separation processes, such as distillation, extraction, and chromatography. When the Dufour number and radiation parameter increase, the fluid velocity increases, and while the heat sink parameter increases, it decreases. As dissipation increases, the velocity of the fluid also increases. The concentration of the fluid is enhanced as mass diffusivity increases. When the heat absorption sink grows, the temperature of the fluid decreases.