Mechanism of Soret‐Dufour, magnetohydrodynamics, heat and mass transfer flow with buoyancy force, and viscous dissipation effects

Abstract

This paper examined the mechanism of both positive and negative effects of Soret‐Dufour with heat and mass transfer processes over an accelerating permeable surface. The partial differential flow equations were simplified using similarity variables, and the resulting equations were solved numerically using the spectral homotopy analysis method (SHAM). The SHAM is used in separating nonlinear equations into linear and nonlinear. The physics of each pertinent flow parameters was used to examine their influence on velocity, temperature, and concentration fields. The effect of Soret‐Dufour was examined separately, and its negative effect was used to determine its influence on velocity, temperature, and concentration fields. The result revealed that positive Soret‐Dufour enhances the boundary layer, whereas negative Soret‐Dufour parameter decreases the boundary layer. The result presented in this paper is in good agreement with existing works in literature.

Soret–Dufour mechanism on an electrically conducting nanofluid flow past a semi‐infinite porous plate with buoyancy force and chemical reaction influence

“…In another study considered by Idowu and Falodun [29], influence of Soret–Dufour with variable viscosity and thermal conductivity was extensively discussed in a hot environment. Also, Ahmed et al [30] explored mechanism of Soret–Dufour with MHD on heat and mass transport flow. Falodun et al [31] examined MHD motion of Casson fluid with Soret–Dufour influence.…”

Comments on “Mechanism of Soret‐Dufour, magnetohydrodynamics, heat and mass transfer flow with buoyancy force, and viscous dissipation effects‏‏”

“…Ahmed et al 1 studied mechanism of magnetohydrodynamics, Soret‐Dufour, mass and heat transfer flow with viscous dissipation, and buoyancy force effects. In this paper, Ahmed et al 1 mentioned that the units of the mass expansion coefficient ( β c ) are K −1 .…”

“…Ahmed et al 1 studied mechanism of magnetohydrodynamics, Soret‐Dufour, mass and heat transfer flow with viscous dissipation, and buoyancy force effects. In this paper, Ahmed et al 1 mentioned that the units of the mass expansion coefficient ( β c ) are K −1 . This is incorrect because the correct units of the mass expansion coefficient ( β c ) are m 3 /mol (ie, the inverse of the concentration [ C ] units) so that the product β c ( C − C ∞ ) is dimensionless in the momentum equation.…”

“…Also, Ahmed et al 1 mentioned that the units of the magnetic field strength ( B 0 ) are Gauss meter. This is incorrect because the correct units of the magnetic field strength ( B 0 ) are Tesla, which can be written too as (Awad 2,3 ): …”

“…In addition, Ahmed et al 1 mentioned that the units of the dynamic viscosity ( μ ) are m 2 /s. This is incorrect because the correct units of the dynamic viscosity ( μ ) are kg/m·s.…”