Abstract
The purpose of this paper is to conduct a numerical study of natural convection flow along an irregular semi-infinite triangular wavy horizontal surface. Coordinate transformation is introduced to transform the boundary layer equations into a form which is more suitable for numerical integration. Implicit finite difference iterative numerical scheme is employed to produce solutions of the problem. Effect of wave amplitude is studied in detail. Important features of the flow field are discussed graphically in terms of skin friction, heat transfer rate, streamlines and isotherms. Although amplitude of the wavy surface play its role in enhancement in the heat transfer rate but it is found difficult to accomplish numerical computations for a> 1.5. Thus, it is concluded that heat liberation is more effective in sinusoidal wavy surface than in triangular surface. (C) 2014 Elsevier Ltd. All rights reserved.