A direct numerical simulation of turbulent flow in a square duct was performed for a Reynolds number based on bulk streamwise velocity and duct height equal to 4,440. The mechanism by which secondary flows are generated in a square duct was investigated. Two counterrotating secondary flows occur around the duct corner. These secondary flows were found to play a key role in momentum transfer between the corner and center of the duct. A conditional quadrant analysis was performed in the local maximum and minimum regions of the wall shear stress in order to characterize the pattern of the mean secondary flows.
|Number of pages||9|
|Journal||Journal of Engineering Mechanics|
|Publication status||Published - 2007 Feb|
All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering