Please use this identifier to cite or link to this item:
http://hdl.handle.net/11422/8838
Especie: | Artigo |
Título : | An inverse problem for the estimation of upstream velocity profiles in an incompressible turbulent boundary layer |
Autor(es)/Inventor(es): | Brasil, Wagner Machado Su, Jian Freire, Atila Pantaleão Silva |
Resumen: | Indisponível. |
Resumen: | An inverse problem is solved for the estimation of upstream velocity profiles in an incompressible turbulent boundary layer over a smooth flat plate. The inverse analysis is based on the boundary layer morphology, making use of the law of the wall and the law of the wake to estimate boundary layer parameters from measured velocity histories. The direct problem of the turbulent boundary layer equations is solved by using finite difference method with the Cebeci–Smith turbulence model. The numerical solution of the direct problem is validated by experimental data obtained through the hotwire anemometry in a low-speed wind tunnel. The friction velocity, Von Kármán constant, law of the wall constant, Coles’s wake-strength parameter and boundary layer thickness for the initial profile are determined as unknown parameters by the Levenberg–Marquardt algorithm. The estimated upstream velocity profiles compare favourably with hotwire anemometry measurements at the same location. |
Materia: | Turbulent boundary layer Inverse problem Hotwire anemometry Parameter estimation Levenberg–Marquardt algorithm |
Materia CNPq: | CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA::AREAS CLASSICAS DE FENOMENOLOGIA E SUAS APLICACOES::DINAMICA DOS FLUIDOS |
Unidade de producción: | Núcleo Interdisciplinar de Dinâmica dos Fluidos |
Editor: | Elsevier |
Es parte de: | International Journal of Heat and Mass Transfer |
Volumen: | 47 |
Número: | 6-7 |
Fecha de publicación: | 4-nov-2003 |
DOI: | 10.1016/j.ijheatmasstransfer.2003.09.012 |
País de edición : | Brasil |
Idioma de publicación: | eng |
Tipo de acceso : | Acesso Aberto |
ISSN: | 0017-9310 |
Aparece en las colecciones: | Engenharias |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
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2004_FREIRE_IJHMT47-min.pdf | 305.05 kB | Adobe PDF | Visualizar/Abrir |
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