The effect of temperature dependent variable viscosity on magnetohydrodynamic (MHD) natural convection flow of viscous\r\nincompressible fluid along a uniformly heated vertical wavy surface has been investigated. The governing boundary layer equations\r\nare first transformed into a nondimensional form using suitable set of dimensionless variables. The resulting nonlinear system\r\nof partial differential equations are mapped into the domain of a vertical flat plate and then solved numerically employing the\r\nimplicit finite difference method, known as Keller-box scheme. The numerical results of the surface shear stress in terms of skin\r\nfriction coefficient and the rate of heat transfer in terms of local Nusselt number, the stream lines and the isotherms are shown\r\ngraphically for a selection of parameters set consisting of viscosity parameter (e), magnetic parameter (M), and Prandtl number\r\n(Pr). Numerical results of the local skin friction coefficient and the rate of heat transfer for different values are also presented in\r\ntabular form.
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