Numerical Investigation of Grooved Obstacle on Heat Transfer Inside A Heated Duct

Flow and heat transfer are simulated numerically in a 2-dimensional centerline- ribbed square duct for different values of the rib height to the duct height (Blocking ratio BR). The blocking ratio of these rectangular obstacles 0, 0.5 and 0.75 are examined. Three values of velocity (0.1, 1 and 4m/s) as inlet working conditions were used. The top and bottom face of the duct are subjected to 1000 W/m2 heat flux. The heat transfer and flow structure with Ansys-Fluent inside a square duct in the presence of rotating vortex generators were studied and the influence of the blocking ratio (BR) on both heat transfer and fluid flow are examined. Numerical simulation was performed by using Ansys-Fluent 18. . In general, the enhancement raticon of heat transfer could reach 54%.