TY - JOUR
T1 - Suboptimal control of turbulent channel flow for drag reduction
AU - Lee, Changhoon
AU - Kim, John
AU - Choi, Haecheon
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 1998/3/10
Y1 - 1998/3/10
N2 - Two simple feedback control laws for drag reduction are derived by applying a suboptimal control theory to a turbulent channel flow. These new feedback control laws require pressure or shear-stress information only at the wall, and when applied to a turbulent channel flow at Reτ = 110, they result in 16-22% reduction in the skin-friction drag. More practical control laws requiring only the local distribution of the wall pressure or one component of the wall shear stress are also derived and are shown to work equally well.
AB - Two simple feedback control laws for drag reduction are derived by applying a suboptimal control theory to a turbulent channel flow. These new feedback control laws require pressure or shear-stress information only at the wall, and when applied to a turbulent channel flow at Reτ = 110, they result in 16-22% reduction in the skin-friction drag. More practical control laws requiring only the local distribution of the wall pressure or one component of the wall shear stress are also derived and are shown to work equally well.
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U2 - 10.1017/S002211209700815X
DO - 10.1017/S002211209700815X
M3 - Article
AN - SCOPUS:0032026642
VL - 358
SP - 245
EP - 258
JO - Journal of Fluid Mechanics
JF - Journal of Fluid Mechanics
SN - 0022-1120
ER -