2D experiments and numerical simulation of the oscillatory shallow flow in an open channel lateral cavity

Navas-Montilla, A. (Universidad de Zaragoza) ; Martínez-Aranda, S. (Universidad de Zaragoza) ; Lozano, A. ; García-Palacín, I. (Universidad de Zaragoza) ; García-Navarro, P. (Universidad de Zaragoza)

Resumen: Steady shallow flows past an open channel lateral cavity can induce the excitation of an eigenmode of a gravity standing wave inside the cavity, called seiche, which may be coupled with the shedding of vortices at the opening of the cavity. The presence of the seiche is of fundamental interest as it enhances the mass exchange between the main channel and the cavity. Measurements of the time evolution of the water surface are not often found in the literature for this type of flows. In this work, an experimental and numerical study of a shallow flow past a channel lateral cavity is carried out. The main novelty is the use of a pioneering non-intrusive experimental technique to measure the water surface at the channel-cavity region. This optical technique offers high resolution 2D data in time and space of the water surface evolution, allowing to determine the relevant features of the seiche oscillation. Such data are supplemented with Particle Image Velocimetry measurements. Furthermore, the experiments are numerically reproduced using a high-resolution depth-averaged URANS shallow water model, under the assumption that shallow water turbulence is mainly horizontal. The experimental and numerical results are analyzed in the frequency domain. High-resolution two-dimensional amplitude oscillation maps of the seiche phenomenon, as well as velocity fields, are presented. The high quality of the experimental data reported in this work makes this data set a suitable benchmark for numerical simulation models in order to evaluate their performance in the resolution of turbulent resonant shallow flows.

Idioma: Inglés

DOI: 10.1016/j.advwatres.2020.103836

Año: 2021

Publicado en: Advances in Water Resources 148 (2021), 103836 [18 pp]
ISSN: 0309-1708

Factor impacto JCR: 5.361 (2021)

Categ. JCR: WATER RESOURCES rank: 19 / 102 = 0.186 (2021) - Q1 - T1

Factor impacto CITESCORE: 9.0 - Environmental Science (Q1)

Factor impacto SCIMAGO: 1.304 - Water Science and Technology (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA-FEDER/Construyendo Europa desde Aragón
Financiación: info:eu-repo/grantAgreement/ES/DGA-FEDER/T32-20R
Financiación: info:eu-repo/grantAgreement/ES/DGA/T01-17R
Financiación: info:eu-repo/grantAgreement/ES/MICINN-FEDER/PGC2018-094341-B-I00

Tipo y forma: Artículo (PostPrint)

Área (Departamento): Área Mecánica de Fluidos (Dpto. Ciencia Tecnol.Mater.Fl.)