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Laboratory studies on the coupled oscillations between an internal density interface and a shear layer

Chua, Lloyd H. and Shuy, E.B. 2008, Laboratory studies on the coupled oscillations between an internal density interface and a shear layer, Journal of engineering mechanics, vol. 134, no. 4, pp. 348-352, doi: 10.1061/(ASCE)0733-9399(2008)134:4(348).

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Title Laboratory studies on the coupled oscillations between an internal density interface and a shear layer
Author(s) Chua, Lloyd H.ORCID iD for Chua, Lloyd H. orcid.org/0000-0003-2523-3735
Shuy, E.B.
Journal name Journal of engineering mechanics
Volume number 134
Issue number 4
Start page 348
End page 352
Total pages 5
Publisher American Society of Civil Engineers
Place of publication Reston, Va.
Publication date 2008
ISSN 1943-7889
Keyword(s) feedback control
oscillations
laboratory tests
fluid flow
water storage
reynolds number
Summary The results from experiments conducted in a 2m high flow compartment at large Reynolds numbers are reported in this paper. Flow entered the compartment through an opening at the base on one side of the compartment and exited from an opening at the bottom of the opposite wall of the compartment. A shear layer is formed at the boundary between the incoming flow and the ambient fluid in the compartment. The impingement of the shear layer on the opposite wall of the compartment gives rise to periodic vortex formation and highly organized oscillations in the shear layer. When a density interface is present inside the compartment, resonance conditions were set up when the oscillations of the internal standing waves were “locked in” with the shear layer oscillations. Under resonance conditions, internal standing waves with amplitudes of up to 0.1m were observed. The formation of the internal standing waves is linked to the shear layer oscillations. Resonance conditions result when the shear layer is oscillating close to the natural frequency of the stratified fluid system in the compartment. The results of this investigation are applicable for fresh water storage in floating bottom-opened tanks in the sea, where under resonance conditions, entrainment rates could be significantly increased.
Language eng
DOI 10.1061/(ASCE)0733-9399(2008)134:4(348)
Field of Research 099999 Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C2.1 Other contribution to refereed journal
Copyright notice ©2008, American Society of Civil Engineers
Persistent URL http://hdl.handle.net/10536/DRO/DU:30063753

Document type: Journal Article
Collection: School of Engineering
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