Numerical study of the atmospheric flow over a coastal cliff

Autor(es)

Pires, Luciana B. M. ^[1] ; de Souza, Leandro Franco ^[2] ; Fisch, Gilberto ^[3] ; Gielow, Ralf ^[4]

Afiliação do(s) autor(es)

^[1] Ctr Numer Weather Forecast & Climate Studies CPTE, Natl Inst Space Res INPE, BR-12227010 Sao Jose Dos Campos, SP - Brazil

^[2] Univ Sao Paulo, Dept Appl Math & Stat ICMC, Sao Carlos, SP - Brazil

^[3] Inst Aeronaut & Space IAE ACA, Aerosp Tech Ctr CTA, Sao Jose Dos Campos, SP - Brazil

^[4] Natl Inst Space Res INPE, Sao Jose Dos Campos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: International Journal for Numerical Methods in Fluids; v. 67, n. 5, p. 599-608, OCT 20 2011.
• Citações Web of Science: 1

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. (AU)

• Processo FAPESP: 08/00233-7 - Estudo de instabilidade secundaria em escoamentos de gortler atraves de simulacao numerica direta.
• Beneficiário: Leandro Franco de Souza
• Modalidade de apoio: Auxílio à Pesquisa - Regular