Updating The Davenport Roughness Classification 16067 на сайте mdn-spb.ru
Based on the updated Davenport roughness classification (Wieringa, 1992), the aerodynamic roughness length (z0) of the surroundings, which is necessary as input for the CFD simulations, is determined as shown in Fig. To estimate roughness visually or from maps, Davenport (Am.Soc.Civ.Eng., 1960) classified all the then available well-exposed profile data for a wide range of terrain. A slightly reformulated Davenport roughness classification is presented. ABL flow over rough terrain classifies as fully rough because the roughness elements (obstacles) are so large that the laminar. Updating the Davenport roughness classification. Journal of Wind Engineering and Industrial. However, Davenport (A-2) and others (A-4) have shown that the ratio of the surface-to-gradient wind speed is relatively insensitive to both the latitude and the gradient wind speed and depends primarily on the upstream terrain roughness. Classification of Meteorological Systems. Name. Table 2: Roughness Lengths Derived from the Terrain Classification of Davenport. Wieringa, J. (1992) ''Updating the Davenport roughness classification''. Journal of Wind Engineering and Industrial Aerodynamics Vol.41, pp, 357-368. roughness length is determined based on the classification of terrain roughness by Davenport, updated by Wieringa (1992). Turbulent kinetic energy k is calculated from IU using k = 1.5(IUU)2. For z0.
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