Experimental characterization of the near-wall turbulence in rough supercritical flows

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2014

Autores

Elsa Carvalho (Autor) FEUP; Rodrigo Maia (Autor) FEUP; Rui Aleixo (Autor) Outra; Rui Ferreira (Autor) Outra

Ata de Conferência Internacional

Título: River Flow 2014

Páginas: 111-118

River Flow 2014 - 7th International Conference on Fluvial Hydraulics

EPFL, Lausanne, Switzerland, 3 a 5 de Setembro de 2014

Indexação

ISI Web of Knowledge - 0 Citações

Scopus - 0 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia civil

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia civil > Engenharia hidraúlica

Outras Informações

ID Authenticus: P-009-S3X

Abstract (EN): Turbulence is a fundamental phenomenon in fluid mechanics and plays an important role in many fluvial processes. The key objective of this paper is the experimental characterization of the near-wall turbulence in supercritical open-channel flows. The work explores a laboratorial database of twocomponent instantaneous velocity series, collected in the vicinity of the bed, by means of Laser Doppler Anemometry. Different flow conditions were analyzed, with Reynolds number ranging from 10(4) to 4 x 10(4) and Froude numbers between 1.3 and 1.8. Turbulent flow variables were measured in order to analyze the behavior of the flow near the wall. The obtained data for the different flow conditions allowed for the quantification of turbulence through statistical moments, spectra and second and third-order structure functions. A comparison between the obtained and the literature values was also performed and discussed.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8