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2 International Journal of Applied Mechanics and Engineering

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Effect of wall conductance on MHD Couette flow and heat transfer in a rotating system

100%

Guria M. , Jana R. N. , Ghosh S. K.

2008

tom Vol. 13, no 1

75-90

The effect of wall conductance on the hydromagnetic Couette flow and heat transfer between two parallel plates in a rotating frame of reference in the presence of an applied uniform transverse magnetic field is studied. An exact solution of the goveming equations has been obtained. It is found that both the primary and the secondary velocities decrease with an increase in wall conduetance parameter. It is also found that the induced magnetic field components increase with an increase in wall conduetance parameter. The shear stresses at the lower plate decrease with an increase in wall conductivity. The heat transfer characteristic has also been studied on taking viscous and Joule dissipation into account.

Unsteady Hartmann flow in a rotating channel with perfectly conducting walls

67%

Seth G. S. , Ansari M. S. , Nandkeolyar R.

2011

tom Vol. 16, no 4

1129-1146

An unsteady Hartmann flow of a viscous incompressible electrically conducting fluid in a rotating channel with perfectly conducting walls under the action of a periodic pressure gradient is studied. An exact solution of the governing equations for the fully developed flow is obtained in a closed form. The expression for the shear stress at the upper plate is also derived. The solutions valid for vanishing and small finite magnetic Prandtl number are derived from the general solution. The asymptotic behavior of these solutions is analyzed, for large values of the frequency parameter […], to gain some physical insight into the flow pattern. It is found that a magnetic field tends to retard the fluid flow in both the primary and secondary flow directions whereas oscillations and rotation tend to accelerate it in both the directions. The magnetic field reduces primary and secondary induced magnetic fields whereas oscillations and rotation have reverse effect on it. The magnetic field reduces the primary as well as secondary shear stress at the upper plate […] whereas oscillations and rotation tend to increase it.