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논문 기본 정보

자료유형
학술저널
저자정보
Cao, Shuyang (State Key Lab for Disaster Reduction in Civil Engineering, Tongji University) Zhang, Enzhen (School of Civil Engineering, Tongji University) Sun, Liming (Tongji Architectural Design [Group] Co. Ltd.) Cao, Jinxin (State Key Lab for Disaster Reduction in Civil Engineering, Tongji University)
저널정보
테크노프레스 Wind & structures Wind & structures 제21권 제3호
발행연도
2015.1
수록면
289 - 309 (21page)

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Vertical profiles of mean and fluctuating wind velocities over water waves were studied, by performing Large-Eddy Simulations (LES) on a fully developed turbulent boundary layer over simplified water waves. The water waves were simplified to two-dimensional, periodic and non-evolving. Different wave steepness defined by $a/{\lambda}$ (a : wave amplitude; ${\lambda}$ : wavelength) and wave age defined by $c/U_b$ (c: phase velocity of the wave; $U_b$ : bulk velocity of the air) were considered, in order to elaborate the characteristics of mean and fluctuating wind profiles. Results shows that, compared to a static wave, a moving wave plays a lesser aerodynamic role as roughness as it moves downstream slower or a little faster than air, and plays more aerodynamic roles when it moves downstream much faster than air or moves in the opposite direction to air. The changes of gradient height, power law index, roughness length and friction velocity with wave age and wave amplitude are presented, which shed light on the wind characteristics over real sea surfaces for wind engineering applications.

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