Analysis of turbulent heat transfer from sinusoidal profile finned dissipators

In the present work the effectiveness of thermal dissipators cooled by a fl uid in turbulent flow is studied by varying the fins spacing and shape. The profile of the fin is described by a sinusoidal function depending on two parameters that define its amplitude and number of oscillations. The veloci ty distribution in the fluid, and the temperature distribution in the dissi pator and in the fluid are determined with the help of a finite element met hod. The model allows to study the variations of the heat transfer coeffici ent due to the fluid dynamic conditions imposed by the fin profile. Lastly, a combination of geometrical parameters is proposed, which yields the best dissipator performance under particular conditions.