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The effect of steady-state natural convection in undulation wall is presented. The two-dimensional numerical analysis is carried out with a method called CVFEM thermally coupled. Incompressible flow formulation written in terms of primitive variables ,this method uses the interpolation equal order velocity-pressure to the resolution of the Navier-Stokes equations, and is applied to the laminar flow problems in natural convection in a vertical channel heated symmetrically, one case is for a single undulation, the other case with several undulations. The thermal boundaries conditions used are uniform wall temperature. The profiles of the local and average Nusselt number are presented for all the studied cases. FORTRAN code is elaborated in this paper.

The Effect of Undulated Wall on Natural Convection Heat Transfer in Vertical Channels