An Effect of Orientation on Heat Transfer Characteristic from Triangular Cylinder by Using Winglets

A numerical simulation is performed to study the effect of geothermal orientation of heat transfer and fluid flow characteristic of a triangular cylinder by using two types of winglets (rectangular and curvature) with air flow at the Reynolds number range 10≤Re≤150 and the cylinder heated at a constant temperature. The numerical computations are carried out using FLUENT 6.1 and Navier- Stokes, continuity and energy equations are solved by using SIMPL method with appropriate boundary conditions. The results were agreed with the previous studies, also its shows that the heat transfer will be enhanced from the triangular cylinderby using winglets. Where heat transfer enhanced from triangular cylinder vertex facing the flow with using curvature winglet by 8-30 % and from triangular cylinder base facing the flow with using rectangular winglet by 6-25 %, also heat transfer increases with increasing Reynolds number.