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An analytical framework for rapid estimate of rain rate during tropical cyclones

Snaiki Reda et Wu Teng. (2018). An analytical framework for rapid estimate of rain rate during tropical cyclones. Journal of Wind Engineering and Industrial Aerodynamics, 174, p. 50-60.

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URL officielle: http://dx.doi.org/doi:10.1016/j.jweia.2017.12.014

Résumé

An analytical framework for rapid estimate of rain rate during a translating tropical cyclone was proposed in this study. The efficient analysis framework for rain field is based on the observation that rain-induced momentum flux at Earth's surface cannot be ignored. The total surface stress results mainly from momentum flux contributions of wind and rain. A height-resolving wind field was utilized during the model construction leading to a linear, analytical solution of the surface rain rate. The obtained rain rate model explicitly depends on parameters for a typical tropical cyclone wind field simulation, namely storm location, approach angle, translation speed, radius of maximum wind, pressure profile, surface drag coefficient, and turbulent diffusivity. Hence, it could be readily implemented into state-of-the-art tropical cyclone risk assessment using the Monte Carlo technique. The rainbands in the proposed methodology were simulated using a local perturbation scheme. Sensitivity analysis of the rainfall field to the abovementioned parameters was comprehensively conducted. The results generated by the present analytical framework for rapid estimate of rain rate during tropical cyclones are consistent with field measurements.

Type de document:Article publié dans une revue avec comité d'évaluation
Volume:174
Pages:p. 50-60
Version évaluée par les pairs:Oui
Date:1 Mars 2018
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, rain rate, wind field simulation, rain-induced stress, cyclone tropical, taux de pluie, simulation de champ de vent, stress induit par la pluie
Déposé le:03 févr. 2021 21:11
Dernière modification:03 févr. 2021 21:11
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