Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 245-258 |
| Number of pages | 14 |
| Journal | Journal of Fluid Mechanics |
| Volume | 358 |
| DOIs | |
| Publication status | Published - 1998 Mar 10 |
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All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
Cite this
}
Suboptimal control of turbulent channel flow for drag reduction. / Lee, Changhoon; Kim, John; Choi, Haecheon.
In: Journal of Fluid Mechanics, Vol. 358, 10.03.1998, p. 245-258.Research output: Contribution to journal › Article
TY - JOUR
T1 - Suboptimal control of turbulent channel flow for drag reduction
AU - Lee, Changhoon
AU - Kim, John
AU - Choi, Haecheon
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.
UR - http://www.scopus.com/inward/record.url?scp=0032026642&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0032026642&partnerID=8YFLogxK
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 -