ON THE PERIODIC MOTION OF A CIRCULAR-CYLINDER THROUGH A LINEARLY STRATIFIED FLUID

Citation
Pa. Davies et al., ON THE PERIODIC MOTION OF A CIRCULAR-CYLINDER THROUGH A LINEARLY STRATIFIED FLUID, Philosophical transactions-Royal Society of London. Physical sciences and engineering, 346(1680), 1994, pp. 353-386
Citations number
34
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Multidisciplinary Sciences
ISSN journal
0962-8428
Volume
346
Issue
1680
Year of publication
1994
Pages
353 - 386
Database
ISI
SICI code
0962-8428(1994)346:1680<353:OTPMOA>2.0.ZU;2-#
Abstract
The results of a series of experiments on the periodic motion of a hor izontal circular cylinder through a linearly stratified fluid are desc ribed. For cases in which the motion is composed of a uniform horizont al translation and a superimposed sinusoidal variation in horizontal v elocity, a number of different flow types are identified, and regime d iagrams delineating the boundaries between the flow types are presente d. Conditions for forward overshooting of wake fluid are discussed, an d suitable scaling criteria are derived for the occurrence of the over shooting phenomenon. Comparisons are made between the unsteady flow da ta and those pertaining to steady flow counterparts having the same in stantaneous parameter values, and the conditions for the generation of flow phenomena associated solely with the periodic nature of the moti on are discussed. Quantitative data are presented on the dependence of typical wake region dimensions on the controlling dimensionless param eters.