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KAMETANI YUKINORI
Department Undergraduate School , School of Science and Technology Position Senior Assistant Professor |
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| Language | English |
| Publication Date | 2015/10 |
| Type | Academic Journal |
| Peer Review | Peer reviewed |
| Title | Effect of uniform blowing/suction in a turbulent boundary layer at moderate Reynolds number |
| Contribution Type | Co-authored (first author) |
| Journal | International Journal of Heat and Fluid Flow |
| Journal Type | Another Country |
| Publisher | ELSEVIER SCIENCE INC |
| Volume, Issue, Page | 55,pp.132-142 |
| Author and coauthor | ◎Yukinori Kametani, Koji Fukagata, Ramis Örlü, Philipp Schlatter |
| Details | A number of well-resolved large-eddy simulations of a spatially evolving turbulent boundary layer with uniform blowing or suction is performed in order to investigate the effect on skin friction drag as well as turbulence statistics and spectral composition at moderate Reynolds numbers up to Reθ=2500. The amplitude of uniform blowing or suction is set to be 0.1% of the free-stream velocity with different streamwise ranges of the controlled region. The boundary layer is thickened by blowing and thinned by suction. The Reynolds shear and normal stresses are increased by blowing and decreased by suction. Through spectral analysis of the streamwise velocity and cross-spectra of the Reynolds shear stress, the enhancement and reduction of the fluctuation energy in the outer region by blowing and suction are found, respectively. It is found that a more effective skin friction drag reduction and control efficiency can be achieved with a wider control region. |
| DOI | 10.1016/j.ijheatfluidflow.2015.05.019 |
| ISSN | 0142-727X |