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Modeling tropical cyclone boundary layer: Height-resolving pressure and wind fields

Snaiki Reda et Wu Teng. (2017). Modeling tropical cyclone boundary layer: Height-resolving pressure and wind fields. Journal of Wind Engineering and Industrial Aerodynamics, 170, p. 18-27.

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URL officielle: http://dx.doi.org/doi:10.1016/j.jweia.2017.08.005

Résumé

The high-accurate wind field of a tropical cyclone boundary layer, which is essentially governed by the Navier-Stokes equations, could be efficiently obtained by predefining the pressure field. Conventionally, the prescribed pressure filed is a 1-D function varying with the distance to the cyclone center (radius). In this study, the pressure field model has been extended to a 2-D function with respect to both radius and height. In addition, a number of field measurements in the tropical cyclone boundary layer indicate rapid variation of the thermodynamic temperature and moisture with time and space. Hence, their effects on the wind field were considered in terms of the virtual temperature, which was integrated in the modeling of pressure field. The analytical solutions of the wind field, as a sum of gradient and frictional wind components, were derived based on a height-resolving scheme using the updated pressure field. Since the tropical cyclone gradient wind and depth of boundary layer are mutually dependent, the iteration approach was utilized in the computation. The proposed height-resolving pressure and wind analytical models have been comprehensively validated with the global positioning system (GPS)-based dropsonde data. The significant importance to consider the height-varying pressure, thermodynamic temperature and moisture in the modeling of the wind field in the tropical cyclone boundary layer were also demonstrated.

Type de document:Article publié dans une revue avec comité d'évaluation
Volume:170
Pages:p. 18-27
Version évaluée par les pairs:Oui
Date:Novembre 2017
Sujets:Sciences naturelles et génie
Sciences naturelles et génie > Génie
Sciences naturelles et génie > Sciences appliquées
Département, module, service et unité de recherche:Départements et modules > Département des sciences appliquées
Mots-clés:Tropical cyclone, height-resolving model, boundary layer wind, pressure, temperature, moisture, cyclone tropical, modèle à résolution de hauteur, vent de la couche limite, pression, température, humidité
Déposé le:03 févr. 2021 18:47
Dernière modification:03 févr. 2021 18:47
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