Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/365
Título: Experiments on layer formation in stratified shear flow
Autores/as: Cisneros Aguirre, Jesús 
Pelegrí Llopart, José Luis 
Sangrá Inciarte, Pablo 
Clasificación UNESCO: 2510 Oceanografía
Palabras clave: Capa límite (Dinámica de fluidos)
Stratified shear flow
Kelvin-Helmholtz instablility
Layer structure
Fecha de publicación: 2001
Publicación seriada: Scientia Marina 
Conferencia: Workshop and Conference on Oceanography
Resumen: We discuss the experimental methodology and present the results of several experiments on the onset and growth of instabilities in stratified shear flow. Our results include the assessment of the effective diffusivity prior to the development of the Kelvin-Helmholtz (K-H) type instability and the measurement of the velocity field. This allows us to determine that the onset of the instability takes place when the Richardson number is close to 0.25, this value slightly decreasing with increasing initial interface thickness. The formation of a fine layered structure at the interface is suggested by density profiles taken immediately after the generation of K-H billows, but the size of the full interface as well as the layers themselves decrease in the following few seconds. We hypothesize that the time scale of the K-H billows in our laboratory experiments is so short that there is no time for added mixing to further distribute and smoothen the initial layer structure.
URI: http://hdl.handle.net/10553/365
ISSN: 0214-8358
Fuente: Scientia Marina [ISSN ISSN 0214-8358], v. 65, (S1), p. 117-126, (Septiembre 2001)
Colección:Artículos
miniatura
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