TY - CHAP
T1 - Pod study of a turbulent boundary layer over a rough forward-facing step
AU - Wu, Yanhua
AU - Tang, Hui
PY - 2014/1/1
Y1 - 2014/1/1
N2 - Large-scale fluctuating flow structures are studied using snapshot proper orthogonal decomposition (POD) in a turbulent boundary layer over a realistic rough forward-facing step (FFS) at Reh = 3,450 and d/h = 8. It was observed that large-scale Q2 event induced by hairpin vortex packet and largescale Q4 event are the dominant fluctuating flow structures that contribute significantly to the first POD mode for both smooth and rough steps. However, the flow structures close to the rough surface were affected differently by different roughness topographies.
AB - Large-scale fluctuating flow structures are studied using snapshot proper orthogonal decomposition (POD) in a turbulent boundary layer over a realistic rough forward-facing step (FFS) at Reh = 3,450 and d/h = 8. It was observed that large-scale Q2 event induced by hairpin vortex packet and largescale Q4 event are the dominant fluctuating flow structures that contribute significantly to the first POD mode for both smooth and rough steps. However, the flow structures close to the rough surface were affected differently by different roughness topographies.
KW - Forward-facing step flow
KW - Proper orthogonal decomposition
KW - Turbulence structures
KW - Turbulent boundary layer
UR - http://www.scopus.com/inward/record.url?scp=84951070020&partnerID=8YFLogxK
U2 - 10.1007/978-3-642-40371-2_11
DO - 10.1007/978-3-642-40371-2_11
M3 - Chapter in an edited book (as author)
T3 - Lecture Notes in Mechanical Engineering
SP - 83
EP - 88
BT - Lecture Notes in Mechanical Engineering
ER -