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1

Three dimensional MHD Casson fluid flow over a stretching surface with variable thermal conductivity

Ganga B., Charles S., Abdul Hakeem A. K., Nadeem S.

Journal of Applied Mathematics and Computational Mechanics

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2021

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Vol. 20, nr 1

25--36

EN

The three-dimensional magnetohydrodynamic (MHD) boundary layer flow of a Casson fluid over a stretching surface set into a porous medium with variable thermal conductivity and heat generation/absorption has been researched. Conservation laws of mass, momentum and energy are changed into ordinary differential equations, which are numerically dealt with by applying the fourth order Runge-Kutta integration scheme in relationship with shooting procedure. The dimensionless velocity, temperature, skin friction coefficient and the local Nusselt number inside the boundary layer are processed and examined through tables and illustrations for various physical parameters. The numerical outcomes obtained for the specific case are sensible in great concurrence with the existing results. Results indicate that momentum boundary layer reduces for the Hartman number and Casson fluid parameter. Temperature is found as an enlightened function for the heat generation and thermal conductivity parameter.

2

Elastic deformation and inclined magnetic field on entropy generation forwalter’s liquid B fluid over a stretching sheet

Ragavan C., Munirathinam S., Govindaraju M., Abdul-Hakeem A. K., Ganga B.

Journal of Applied Mathematics and Computational Mechanics

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2019

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Vol. 18, nr 2

85--98

EN

An analytical solution is presented for entropy generation on MHD Walter’s liquid B fluid over a stretching sheet with elastic deformation. The governing expressions of PDEs are converted into ODEs by suitable transformation which is solved by a hypergeometric function. Plots for velocity, heat transfer, entropy generation and a Bejan number are examined and their behavior is deliberated for several physical parameters. It is noticed that the entropy generation is minimized for an Eckert number and enhanced for an elastic deformation parameter. Moreover, these two parameters on the Bejan number profile have reverse effects.

3

MHD nonlinear flow and heat transfer over a stretching porous surface of constant heat flux

Anjali Devi S. P., Ganga B.

Computer Assisted Mechanics and Engineering Sciences

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2008

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Vol. 15, No. 1

15-22

EN

MHD nonlinear steady flow and heat transfer over a porous surface stretching with a power-law velocity and of constant heat flux is investigated. The governing nonlinear partial differential equations are reduced to nonlinear ordinary differential equations by using similarity transformation. As the presented solution method requires the magnetic field to vary in space in a specific manner, a special form for the variable magnetic field is chosen. Resulting equations are numerically solved by Runge–Kutta shooting method. Values of skin-friction and rate of heat transfer are obtained. The effect of magnetic field, stretching parameter, magnetic interaction parameter, suction parameter and Prandtl number over a flow field and other physical quantities have been discussed in detail.