Numerical study of the atmospheric flow over a coastal cliff


Autoria(s): PIRES, Luciana B. M.; SOUZA, Leandro Franco de; FISCH, Gilberto; GIELOW, Ralf
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

20/10/2012

20/10/2012

2011

Resumo

This work presents a numerical method suitable for the study of the development of internal boundary layers (IBL) and their characteristics for flows over various types of coastal cliffs. The IBL is an important meteorological occurrence for flows with surface roughness and topographical step changes. A two-dimensional flow program was used for this study. The governing equations were written using the vorticity-velocity formulation. The spatial derivatives were discretized by high-order compact finite differences schemes. The time integration was performed with a low storage fourth-order Runge-Kutta scheme. The coastal cliff (step) was specified through an immersed boundary method. The validation of the code was done by comparison of the results with experimental and observational data. The numerical simulations were carried out for different coastal cliff heights and inclinations. The results show that the predominant factors for the height of the IBL and its characteristics are the upstream velocity, and the height and form (inclination) of the coastal cliff. Copyright (C) 2010 John Wiley & Sons, Ltd.

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

CNPq[302117/2004-0]

FAPESP[2008/00233-7]

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Identificador

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS, v.67, n.5, p.599-608, 2011

0271-2091

http://producao.usp.br/handle/BDPI/28893

10.1002/fld.2377

http://dx.doi.org/10.1002/fld.2377

Idioma(s)

eng

Publicador

WILEY-BLACKWELL

Relação

International Journal for Numerical Methods in Fluids

Direitos

restrictedAccess

Copyright WILEY-BLACKWELL

Palavras-Chave #immersed boundary method #high-order schemes #wind profiles #vorticity fields #internal boundary layer #coastal cliffs #INTERNAL BOUNDARY-LAYER #TRANSITION #SIMULATION #RESOLUTION #ROUGHNESS #SCHEMES #HEART #Computer Science, Interdisciplinary Applications #Mathematics, Interdisciplinary Applications #Mechanics #Physics, Fluids & Plasmas
Tipo

article

original article

publishedVersion