Hosseinali Soltanipour - Urmia University of Technology(UUT), Urmia, Iran
Parisa choupani
Iraj Mirzaei

Counter rotating longitudinal vortices produced by a winglet pair in a channel are known to enhance heat transfer. In the present work the flow structure and heat-transfer enhancement by a rectangular winglet pair has been studied. A rectangular winglet pair type vortex generator is placed in laminar channel flow. Computations are done by solving the steady, three-dimensional, incompressible Navier–Strokes and energy equation using finite volume method. It is observed that as compared to a channel without winglets, local heat transfer is enhanced several times but the average heat transfer is enhanced by 38% when a winglet pair is employed. Effects of angle of attack of the winglets and Reynolds number on the heat transfer augmentation and pressure drop and compactness are presented.

Heat transfer, Vortex generator, Compactness, Fanning friction factor