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 |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering