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Journal of Porous Media
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ISSN Imprimer: 1091-028X
ISSN En ligne: 1934-0508

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Journal of Porous Media

DOI: 10.1615/JPorMedia.v18.i7.20
pages 665-678

MULTIPLE SLIP EFFECTS ON UNSTEADY MHD REAR STAGNATION POINT FLOW OF NANOFLUIDS IN A DARCIAN POROUS MEDIUM

Waqar Khan
Prince Mohammad Bin Fahd University
Mohammed Jashim Uddin
School of Mathematical Sciences, Universiti Sains Malaysia, Penang 11800, Malaysia; Department of Mathematics, American International University-Bangladesh, Banani, Dhaka 1213, Bangladesh
Ahmad I. Md. Ismail
School of Mathematical Sciences, Universiti Sains Malaysia, Penang 11800, Malaysia

RÉSUMÉ

The unsteady magnetohydrodynamic flow of a viscous incompressible fluid past a permeable vertical plate in a Darcian porous medium is investigated theoretically and numerically. A time-dependent magnetic field is applied normal to the plate. Cu-water nanofluid with different solid volume fraction of copper nanoparticles is considered. Using suitable similarity transformations, the governing partial differential equations are reduced to a system of nonlinear ordinary differential equations; linearized using a successive linearization method and then solved using a finite difference method. The effects of the controlling parameters on the dimensionless velocity, temperature, concentration, wall shear stress, heat and mass transfer rates are investigated. The numerical results are compared to published results and good agreement is observed.


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