Please use this identifier to cite or link to this item: http://hdl.handle.net/11400/5612
Title: Chaotic wakes in flow past an oscillating cylinder
Authors: Πέππα, Σοφία
Καϊκτσής, Λάμπρος
Τριανταφύλλου, Γιώργος Σ.
Item type: Conference publication
Conference Item Type: Full Paper
Keywords: Cylinder oscillating;Transverse frequency;Vibrations;Κύλινδρος ταλάντωσης;Εγκάρσια συχνότητα;Δονήσεις
Subjects: Marine engineering
Shipbuilding
Ναυτιλία
Ναυπηγική
Issue Date: 4-Feb-2015
Jun-2010
Abstract: In this paper we present computational results of the flow past a cylinder oscillating transversely and in-line to a uniform stream. The in-line oscillation has a frequency equal to twice the transverse frequency. The cylinder thus follows an eight-like trajectory, emulating the response of real structures undergoing vortex-induced vibrations. Here, the transverse oscillation frequency obtains values close to the natural frequency of the Kármán vortex street, while the corresponding oscillation amplitude is varied from zero to 0.6 times the cylinder diameter. We find that certain combinations of oscillation frequency and amplitude result in chaotic wakes, characterized by chaotic lift spectra. We attribute the chaotic flow behavior to the presence of cylinder oscillation in the in-line direction, which forces a symmetric mode; the competition between this mode and the staggered Kármán mode induces the observed chaotic states.
Language: English
Citation: Peppa, S., Kaiktsis, L. and Triantafyllou, G.S. (2010). Chaotic wakes in flow past an oscillating cylinder. 6th Conference on Bluff Body Wakes and Vortex Induced Vibrations, Capri Island Italy, 06/2010.
Conference: 6th Conference on Bluff Body Wakes and Vortex Induced Vibrations
Access scheme: Embargo
License: Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες
URI: http://hdl.handle.net/11400/5612
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