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MHD flow of a visco-elastic fluid through a porous medium between infinite parallel plates with time dependent suction

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Abstract

This work provides a comprehensive theoretical analysis of MHD unsteady free convection viscoelastic fluid flow through a porous medium. The medium is treated as incompressible and optically transparent. The flow of the fluid is initiated by shearing action of the moving wall with time dependent suction. Radiative heat flow is considered in temperature equation. The coupled non-linear problem has been solved asymptotically. Approximate solutions have been obtained for the mean velocity, mean temperature using multi parameter perturbation technique. The originality of the present study is to investigate the effect of viscoelastic property of the fluid (Walters B′ model) on the flow and heat transfer phenomena when the flow is permeated through a porous medium with uniform porous matrix subject to transverse magnetic field and time dependent fluctuative suction at the boundary surface. The case of viscous flow has been discussed as a particular case on comparison with the result reported earlier and it is in good agreement. Flow reversal is indicated incase of viscoelastic fluid with high heat capacity in the presence of magnetic field. The higher cooling of the plate in case of viscoelastic flow also causes a flow reversal.

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Correspondence to S. Baag.

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Biography: BAAG S. (1976-), Female, Ph. D., Assistant Professor

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Baag, S., Acharya, M.R., Dash, G.C. et al. MHD flow of a visco-elastic fluid through a porous medium between infinite parallel plates with time dependent suction. J Hydrodyn 27, 738–747 (2015). https://doi.org/10.1016/S1001-6058(15)60536-4

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  • DOI: https://doi.org/10.1016/S1001-6058(15)60536-4

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