Sangam: A Confluence of Knowledge Streams

Stability of the vortex motion in oscillating flow.

Show simple item record

dc.contributor Sarpkaya, T.
dc.contributor Naval Postgraduate School (U.S.)
dc.contributor Mechanical Engineering
dc.creator McCoy, William T.
dc.date December 1986
dc.date 2012-11-27T00:18:17Z
dc.date 2012-11-27T00:18:17Z
dc.date 1986-12
dc.date.accessioned 2022-05-19T07:34:52Z
dc.date.available 2022-05-19T07:34:52Z
dc.identifier http://hdl.handle.net/10945/22118
dc.identifier.uri http://localhost:8080/xmlui/handle/CUHPOERS/100057
dc.description Previous experimental investigations have shown that the characteristics of flow about a circular cylinder immersed in a time-dependent flow exhibit cycle-to-cycle variations. These variations have been attributed to the variations in the spanwise coherence, aspect ratio, nonuniformity of the flow, and random disturbances in the ambient flow. A theoretical investigation was undertaken to examine the stability of the flow characteristics in terms of the initial state of the vortices. An idealized model has been devised and the position of the vortex was varied systematically. The results have shown that finite-precision information about the characteristics of the flow does not lead to finite-precision information at a later stage. In fact the advection of the vortices can give rise to chaotic behavior in the calculated lift and drag forces and in the velocity field. It is concluded that the cycle-to-cycle variations are not entirely due to lack of spanwise coherence and that they are mostly a consequence of the chaotic motion which can result from the advection of the vortices in a time-dependent flow.
dc.description http://archive.org/details/stabilityofvorte00mcco
dc.description Lieutenant, United States Navy
dc.description Approved for public release; distribution is unlimited.
dc.format 110 p.
dc.format application/pdf
dc.language en_US
dc.rights This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
dc.subject Mechanical engineering
dc.subject vortex advection
dc.subject chaos
dc.subject vortices
dc.subject vortex motion
dc.subject coherence length
dc.subject aspect ratio
dc.title Stability of the vortex motion in oscillating flow.
dc.type Thesis


Files in this item

Files Size Format View
stabilityofvorte00mcco.pdf 5.387Mb application/pdf View/Open

This item appears in the following Collection(s)

Show simple item record

Search DSpace


Advanced Search

Browse