Counter-Gradient Term Applied to the Turbulence Parameterization in the BRAMS

Autor:	Saulo R. Freitas, Renata S. R. Ruiz, M. E. S. Welter, H.F. de Campos Velho
Rok vydání:	2017
Předmět:	Physics::Fluid Dynamics Flow (mathematics) Closure (computer programming) Turbulence Computer science Mesoscale meteorology Applied mathematics Statistical theory Numerical weather prediction Dynamical system Physics::Atmospheric and Oceanic Physics Term (time)
Zdroj:	Integral Methods in Science and Engineering, Volume 2 ISBN: 9783319593869
DOI:	10.1007/978-3-319-59387-6_29
Popis:	The numerical weather prediction is a routine in operational meteorological centers, where sophisticated computer models are executed. The atmospheric dynamics is simulated by solving the Navier-Stokes equations, considering several physical phenomena. One parameterization applied to this dynamical system is to represent the turbulence. A counter-gradient flow can be described for higher order closure turbulence approaches. Here, a first order parameterization for the turbulent flow is coupled with an explicit counter-gradient term. Both latter schemes are based on the Taylors statistical theory of turbulence. The parameterization schemes are applied to the BRAMS, a mesoscale meteorological model. The simulation is compared with experimental data measured in the Brazilian Amazon region.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::69a794eac7f05d920340a08bf766af45 https://doi.org/10.1007/978-3-319-59387-6_29 Zobrazit plný text záznamu