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多孔介质期刊
影响因子: 1.49 5年影响因子: 1.159 SJR: 0.504 SNIP: 0.671 CiteScore™: 1.58

ISSN 打印: 1091-028X
ISSN 在线: 1934-0508

多孔介质期刊

DOI: 10.1615/JPorMedia.v12.i5.70
pages 477-488

Effects of Variable Properties on Magnetohydrodinamics Unsteady Mixed-Convection in non-Newtonian Fluid with Variable Surface Temperature

Nasser S. Elgazery
Department of Mathematics, Deanship of Educational Services, Qassim University, P. O. Box 6595, Al-Qassim, Buraidah: 51452 Saudi Arabia
Nader Y. Abd Elazem
Department of Mathematics, Faculty of Education, Ain Shams University, Roxy, Heliopolis, Cairo, Egypt

ABSTRACT

A mathematical model will be analyzed numerically in order to study the effects of a variable viscosity and thermal conductivity on unsteady heat and mass transfer in a non-Newtonian power-law fluid flow through a porous medium past a semi-infinite vertical plate with variable surface temperature in the presence of magnetic field and radiation. The fluid viscosity and thermal conductivity are assumed to vary linearly with temperature. The governing nonlinear partial differential equations are transformed into a linear algebraic system utilizing the Chebyshev collocation method in spatial and the Crank-Nicolson method in time. Numerical results for the velocity, temperature, and concentration profiles as well as for the local skin friction, Nusselt number, and Sherwood number are obtained and reported in tabular form and graphically for various parametric conditions to show interesting aspects of the solution.


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