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Transitions to chaos in the wake of an axisymmetric bluff body

Bury, Yannick and Jardin, Thierry Transitions to chaos in the wake of an axisymmetric bluff body. (2012) Physics Letters A, 376 (45). 3219-3222. ISSN 0375-9601

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Official URL: http://dx.doi.org/10.1016/j.physleta.2012.09.011


This letter aims at understanding the dynamical process that leads to the onset of chaos in the flow past a blunt-based axisymmetric bluff body. On the basis of direct numerical simulations, conducted for Reynolds numbers ranging from 100 to 900, we show that the flow undergoes multiple transitions, successively giving rise to the SS, RSPa, RSPb, RSPc and RSB wake states. In particular, the RSPc state, revealed in this work via long-term computations, is characterized by intermittent vortex stretching denoting the onset of chaos before the symmetry breaking and the occurence of the RSB state.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Electrochimica Acta website: http://www.sciencedirect.com/science/article/pii/S0375960112009851
HAL Id:hal-00781680
Audience (journal):International peer-reviewed journal
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Institution:Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
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Deposited On:11 Oct 2012 12:20

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