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Article Dans Une Revue Journal of Atmospheric and Oceanic Technology Année : 2004

Experimental and numerical study of the turbulence characteristics of air flow around a research vessel

Résumé

Airow distortion by research vessels has been shown to signicantly affect micro-meteorological measurements. This study uses an efficient time-dependent Large Eddy Simulation numerical technique to investigate the effect of the research vessel Tangaroa on both the mean and turbulent characteristics of airflow. Detailed comparison is given between the numerical results and an extensive experimental dataset. The study is performed for the whole range of relative wind directions and for instruments located in regions of high and low flow distortion. The experimental data show that both the normalised wind speed and normalised standard deviation are only weakly dependent on wind speed, ship speed, ship motion and sea state, but strongly dependent on relative wind direction. Very good agreement is obtained between the experimental and numerical data for the mean flow, standard deviation and turbulence spectra, even in areas of strong turbulence.

Domaines

Océanographie
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Dates et versions

hal-01445435 , version 1 (24-01-2017)

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S. Popinet, M. Smith, C. Stevens. Experimental and numerical study of the turbulence characteristics of air flow around a research vessel. Journal of Atmospheric and Oceanic Technology, 2004, 21 (10), pp.1574-1589. ⟨10.1175/1520-0426(2004)021<1575:EANSOT>2.0.CO;2⟩. ⟨hal-01445435⟩
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