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Communication Dans Un Congrès Année : 2013

High-order simulation of the flow instability over a non-circular structure

Résumé

Bluff bodies can be prone to well-known self-excited instability such as galloping. Opposite to classical and well documented Vortex Induced Vibrations (VIV), oscillation amplitude is not bounded in such a way galloping-like instability can alter the integrity of the structure on short term. Although stability criteria exist in the literature [1], there is a real lack considering the cause and the way to inhibit such instability. It is consequently proposed in this paper to investigate the flow over the classical ‘non-circular’ structure, i.e. the square box body, by means of advanced Spectral Large Eddy Simulation (LES) solver, [16], [17] & [18]. The main objectives of this numerical analysis will be to provide an accurate solution to underline the possible mechanisms that trigger the instability as well as a base solution for future wake stability & control analysis, [6].
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hal-01309838 , version 1 (20-10-2020)

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Matthieu Minguez, Philippe Meliga, Eric Serre. High-order simulation of the flow instability over a non-circular structure. ASME 32nd International Conference on Ocean, Offshore and Arctic Engineering, OMAE, Jun 2013, Nantes, France. ⟨10.1115/OMAE2013-10200⟩. ⟨hal-01309838⟩
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