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- W321673430 abstract "A systematic analysis is made of suboptimal control for drag reduction. The influence of the amplitude of actuation (A) and the time scale of actuation (t(sub)a(sup)+) is evaluated. Two wall sensing variables are employed (∂w/∂y│(sub)w and ∂p/∂z│(sub)w) with two wall actuations (and ). To test the suboptimal control, direct numerical simulations of turbulent channel flow at Re(sub)=100 are performed in a spectral domain. It is found that the effect of A and t(sub)a(sup)+∼1. The near-wall behaviors of flow structure are analyzed to characterize the drag reduction. The size effect of the sensor/actuator is examined." @default.
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- W321673430 date "2001-01-01" @default.
- W321673430 modified "2023-09-25" @default.
- W321673430 title "Evaluation of Suboptimal Control in Turbulent Channel Flow" @default.
- W321673430 doi "https://doi.org/10.22634/ksme-b.2001.25.9.1227" @default.
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