2024-03-29T07:37:02Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/53282020-11-10T08:21:19Zcom_10261_123com_10261_8col_10261_376
Cisneros-Aguirre, J.
Pelegrí, Josep Lluís
Sangrà, Pablo
2008-06-25T12:05:36Z
2008-06-25T12:05:36Z
2001-07
Scientia Marina 65(Suppl.1): 117-126 (2001)
0214-8358
http://hdl.handle.net/10261/5328
10.3989/scimar.2001.65s1117
1886-8134
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
eng
openAccess
Stratified shear flow
Kelvin-Helmholtz instability
Layer structure
Experiments on layer formation in stratified shear flow
artículo