Modulation of near-wall turbulence structure with wall blowing and suction
Chung, Yongmann M., Sung, Hyung Jin and Krogstad, P.-A.. (2002) Modulation of near-wall turbulence structure with wall blowing and suction. AIAA JOURNAL, 40 (8). pp. 1529-1535. ISSN 0001-1452Full text not available from this repository.
Official URL: http://www.aiaa.org/content.cfm?pageid=318&pubid=2
The effects of wall blowing and suction on a fully developed, equilibrium turbulent channel flow are studied numerically. Direct numerical simulation data are analyzed to investigate the. modulation of near-wall turbulence anisotropy after the sudden application of wall blowing and suction. The effects on. the near-wall turbulence structure are examined in terms of the asymptotic near-wall behavior of various turbulence quantities and the turbulence anisotropy. It is found that blowing makes the near-wall flow more isotropic and enhances the transverse (nu' and w') components of velocity fluctuations. A significant increase in the anisotropy of the near-wall region is found in the suction case. The anisotropy invariant map for the Reynolds stress anisotropy tensor indicates that the relaxation processes of the anisotropy of the near-wall turbulence are different for the blowing and suction cases, respectively. The response of the flow to the sudden application of wall blowing and suction occurs earlier. for blowing than for suction, although there is a delayed response in both cases.
|Item Type:||Journal Article|
|Subjects:||T Technology > TL Motor vehicles. Aeronautics. Astronautics|
|Divisions:||Faculty of Science > Engineering|
|Journal or Publication Title:||AIAA JOURNAL|
|Publisher:||American Institute of Aeronautics and Astronautics|
|Number of Pages:||7|
|Page Range:||pp. 1529-1535|
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