Simultaneous measurements of three-dimensional velocity components and free-surface elevations were carried out in the lagoon of Fogliano, to investigate the statistical characteristics of turbulence produced in the flow by the action of wind over the free surface. Measurements were made in typical spring–summer environmental conditions, characterized by a gentle sea-breeze wind. Two measurement points were chosen far from the only tidal channel of the lagoon to evidence the role of the wind in generating turbulence. The analysis of velocity data has proved: (1) the presence of a significant oscillatory motion due to wind waves, which affects the entire water column and interferes with the lagoon bottom; (2) an evident degree of anisotropy between larger horizontal and vertical turbulent scales; (3) the existence of a scaling range where the relative scaling exponents, calculated using the Extended Self Similarity, have a scale-independent behavior.

An experimental study of the turbulence statistics in a lagoon / Cioffi, Francesco; Gallerano, Francesco; G., Troiani. - In: JOURNAL OF HYDRAULIC RESEARCH. - ISSN 0022-1686. - STAMPA. - 44:2(2006), pp. 155-169. [10.1080/00221686.2006.9521672]

An experimental study of the turbulence statistics in a lagoon

CIOFFI, Francesco;GALLERANO, Francesco;
2006

Abstract

Simultaneous measurements of three-dimensional velocity components and free-surface elevations were carried out in the lagoon of Fogliano, to investigate the statistical characteristics of turbulence produced in the flow by the action of wind over the free surface. Measurements were made in typical spring–summer environmental conditions, characterized by a gentle sea-breeze wind. Two measurement points were chosen far from the only tidal channel of the lagoon to evidence the role of the wind in generating turbulence. The analysis of velocity data has proved: (1) the presence of a significant oscillatory motion due to wind waves, which affects the entire water column and interferes with the lagoon bottom; (2) an evident degree of anisotropy between larger horizontal and vertical turbulent scales; (3) the existence of a scaling range where the relative scaling exponents, calculated using the Extended Self Similarity, have a scale-independent behavior.
01 Pubblicazione su rivista::01a Articolo in rivista
An experimental study of the turbulence statistics in a lagoon / Cioffi, Francesco; Gallerano, Francesco; G., Troiani. - In: JOURNAL OF HYDRAULIC RESEARCH. - ISSN 0022-1686. - STAMPA. - 44:2(2006), pp. 155-169. [10.1080/00221686.2006.9521672]
File allegati a questo prodotto
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/358379
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 1
  • ???jsp.display-item.citation.isi??? 1
social impact