著者

宮下 勝浩 新谷 賢司 河村 洋

出版者

日本流体力学会

雑誌

日本流体力学会年会講演論文集 (ISSN:13428004)

巻号頁・発行日

vol.2004, pp.400-401, 2004-08-09

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The direct numerical simulations (DNSs) of the turbulent Ekman boundary layer over a smooth surface are performed. The Reynolds number are set to be Re_f=400, 510, 600 and 775 where Re_f based on the Geostrophic wind velocity G, kinematic viscousity υ and Ekman depth D=√<2υ/f>. The large computational box and the long averaging time are employed in order to capture the turbulence structure. A unique turbulence structure is found in the region where the mean velocity reaches its maximum, while the well-known streak structures are discussed using the obtained instantaneous flow field and the two-point correlations.