Double-Diffusion MHD Free Convective Flow along a Sphere in the Presence of a Homogeneous Chemical Reaction and Soret and Dufour Effects

Chamkha, Ali J.

doi:10.11648/j.acm.20170601.12

Cited by 9 publications

(3 citation statements)

References 27 publications

(27 reference statements)

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“…In this study, they analyzed the effects of the chemical reaction, buoyancy parameter, Schmidt and Prandtl number. Double-diffusion MHD free convective flow along a sphere in the presence of a homogeneous chemical reaction and Soret and Dufour effects were studied by Chamkha et al [11]. The effect of thermal radiation, Soret and Dufour were reported in this study.…”

Section: Introductionmentioning

confidence: 59%

Natural Convection MHD Radiative Flow on a Sphere Through Porous Medium Considering Ohmic Dissipation

Ayano¹,

Otegbeye²,

Goqo³

2019

IJHT

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In this study, the problem of an electrically conducting and steady incompressible micropolar fluid with a natural convection boundary layer flow in a sphere in the presence of a strong magnetic field has been considered. This type of flow has many engineering applications, such as drying processes, electronic cooling, ceramic processing, heat exchanger devices and many more. The effect of radiation, chemical reaction, magnetic source; permeability and heat source/sink on the velocity, temperature and concentration profiles of the fluid flow in the medium are investigated. The governing equations describing the problem are transformed into non-dimensional partial differential equations. The equations are solved with the recently introduced multi-domain spectral quasilinearization method. The method involves the use of quasilinearization in linearizing nonlinear functions, a domain splitting approach to split the time interval into several sub-intervals and the Chebyshev spectral collocation method in solving the system. The results obtained suggest that the various parameters tested have a significant impact on various flow profiles. While the velocity and temperature of the fluid increases with an increase in the heat source parameter, the concentration of the fluid are observed to increase with an increase in the radiation and permeability parameters, respectively. Increase in the chemical reaction parameter leads to a decrease in the fluid velocity around the boundary layer. The analysis performed suggests that the multidomain spectral quasilinearization method is efficient in solving fluid flow problems of similar dynamics.

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Section: Introductionmentioning

confidence: 59%

Natural Convection MHD Radiative Flow on a Sphere Through Porous Medium Considering Ohmic Dissipation

Ayano¹,

Otegbeye²,

Goqo³

2019

IJHT

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“…Due to its vast applications, many researchers have worked on the double diffusion combined convection flow past various geometries such as sphere, exponential stretching sheet, vertical cone, slender cylinder, moving plate, etc. [2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Mixed Convective Flow over a Moving Yawed Cylinder Driven by Buoyancy

2021

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The fluid flow over a yawed cylinder is useful in understanding practical significance for undersea applications, for example, managing transference and/or separation of the boundary layer above submerged blocks and in suppressing recirculating bubbles. The present analysis examines nonlinear mixed convection flow past a moving yawed cylinder with diffusion of liquid hydrogen. The coupled nonlinear control relations and the border restrictions pertinent to the present flow problem are nondimensionalized by using nonsimilar reduction. Further, implicit finite difference schemes and Quasilinearization methods are employed to solve the nondimensional governing equations. Impact of several nondimensional parameters of the analysis on the dimensionless velocity, temperature and species concentration patterns and also on Nusselt number, Sherwood number and friction parameter defined at the cylinder shell is analyzed through numerical results presented in various graphs. Velocity profiles can be enhanced, and the coefficients of friction at the surface can be reduced, for increasing values of velocity ratio parameters along chordwise as well as spanwise directions. Species concentration profile is reduced, while the Sherwood number is enhanced, for growth of the Schmidt number and yaw angles. Furthermore, for an increasing value of yaw angle, skin-friction coefficient in chordwise direction diminishes in opposing buoyancy flow case, whereas the results exhibit the opposite trend in assisting buoyancy flow case. Moreover, very importantly, for increasing magnitude of nonlinear convection characteristic, the liquid velocity and surface friction enhance in spanwise direction. Further, for increasing magnitude of combined convection characteristics, velocity profiles and coefficient of friction at the surface enhance in both spanwise and chordwise directions. Moreover, we have observed that there is no deviation for zero yaw angle in Nusselt number and Sherwood number.

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“…Gaffar et al [32], Rao et al [33], and Beg et al [34] have given their contributions to the study of fluid flow, heat-mass transfer for non-Newtonian fluids, such as viscoelastic Jeffrey fluid, tangent Hyperbolic fluid, and micropolar fluid, respectively, from a permeable isothermal sphere with the combined effects of Soret and Dufour. Recently, Chamkha et al [35] presented a numerical solution for the study of convective flow over a sphere in the presence of chemical reaction and Soret-Dufour effect.…”

Section: Introductionmentioning

confidence: 99%

Soret/Dufour Effects on Radiative Free Convection Flow and Mass Transfer over a Sphere with Velocity Slip and Thermal Jump

Jain¹,

BOHRA²

2018

Walailak J Sci & Tech

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In this paper, a steady free convective heat and mass transfer boundary layer flow of an electrically conducting viscous fluid from a sphere in a porous medium with thermal radiation is studied. Soret and Dufour effects, velocity slip, and thermal slip are considered at the boundary. The governing PDE is transformed into non-linear ODE using suitable similarity transformations and solved numerically using bvp4c solver of MATLAB. The effect of Schmidt number (Sc), concentration to thermal buoyancy ratio parameter (Nb), Dufour number (Du), Soret number (Sr), radiation parameter (N), permeability parameter (K), dimensionless velocity slip parameter (g), and dimensionless thermal jump parameter (j) on velocity, temperature and concentration fields, skin friction, and heat and mass transfer rates are analyzed and presented through graphs and tables.

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Double-Diffusion MHD Free Convective Flow along a Sphere in the Presence of a Homogeneous Chemical Reaction and Soret and Dufour Effects

Cited by 9 publications

References 27 publications

Natural Convection MHD Radiative Flow on a Sphere Through Porous Medium Considering Ohmic Dissipation

Natural Convection MHD Radiative Flow on a Sphere Through Porous Medium Considering Ohmic Dissipation

Nonlinear Mixed Convective Flow over a Moving Yawed Cylinder Driven by Buoyancy

Soret/Dufour Effects on Radiative Free Convection Flow and Mass Transfer over a Sphere with Velocity Slip and Thermal Jump

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