Mathematical Problems in Engineering
Volume 2006 (2006), Article ID 60560, 14 pages
doi:10.1155/MPE/2006/60560
Oscillatory motion of an electrically conducting viscoelastic fluid over a stretching sheet in a saturated porous medium with suction/blowing
1Department of Mechanical Engineering, JNTU College of Engineering, Jawaharlal Nehru Technological University, Anantpur, Andhrapradesh, India
2Department of Mathematics, Smt. V.G. College for Women, Gulbarga, Karnataka, India
3Department of Mechanical Engineering, P.D.A. College of Engineering, Gulbarga, Karnataka, India
Received 21 April 2004; Revised 21 February 2005; Accepted 19 May 2005
Copyright © 2006 K. Rajagopal et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
The effect of an oscillatory motion of a viscoelastic fluid over
an infinite stretching sheet through porous media in the presence
of magnetic field with applied suction has been studied. The
surface absorbs the fluid in a porous medium in the presence of
magnetic field and the velocity oscillates depending on the
stretching rate (b). Analytical expressions for the velocity and
the coefficient of skin friction have been studied, first by the
perturbation method and then by power series method. The effect of
viscoelastic parameter k1, porous parameter k2, magnetic parameter Mn, and the vertical distance x in the presence of
suction/blowing on the velocity and the flow characteristics are
discussed. The velocity of the viscoelastic fluid is found to
decrease in the presence of magnetic field and porous media, as
compared to the study of viscous fluid. It is also found that the
effect of unsteadiness in the wall velocity and skin friction are
found to be appreciable in the presence of suction/blowing
parameter.