TY - JOUR
T1 - Direct numerical simulation of turbulent flow in a square duct
T2 - Analysis of secondary flows
AU - Joung, Younghoon
AU - Choi, Sung Uk
AU - Choi, Jung Il
PY - 2007/2
Y1 - 2007/2
N2 - 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.
AB - 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.
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U2 - 10.1061/(ASCE)0733-9399(2007)133:2(213)
DO - 10.1061/(ASCE)0733-9399(2007)133:2(213)
M3 - Article
AN - SCOPUS:33846451753
SN - 0733-9399
VL - 133
SP - 213
EP - 221
JO - Journal of Engineering Mechanics - ASCE
JF - Journal of Engineering Mechanics - ASCE
IS - 2
ER -