Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/365
Title: Experiments on layer formation in stratified shear flow
Authors: Cisneros Aguirre, Jesús 
Pelegrí Llopart,José Luis 
Sangrá Inciarte, Pablo 
UNESCO Clasification: 2510 Oceanografía
Keywords: Capa límite (Dinámica de fluidos)
Issue Date: 2001
Journal: Scientia Marina 
Conference: Workshop and Conference on Oceanography
Abstract: 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
Source: Scientia Marina [ISSN ISSN 0214-8358], v. 65, suplemento 1, pp. 117-126.
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