HIGH-ORDER SIMULATION OF THE FLOW INSTABILITY OVER A NON-CIRCULAR ă STRUCTURE

• Main Authors: Minguez, Matthieu, Meliga, Philippe, Serre, Eric
• Other Authors: Modélisation et Simulation Numérique (en mécanique des fluides) (M2P2), Centre National de la Recherche Scientifique (CNRS)-Université de Provence - Aix-Marseille 1-Université Paul Cézanne - Aix-Marseille 3-Université de la Méditerranée - Aix-Marseille 2, Laboratoire Jean Alexandre Dieudonné (JAD), Université Nice Sophia Antipolis (. - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Mécanique, Modélisation et Procédés Propres (M2P2), Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU)
• Format: Conference Object
• Language: English
• Published: HAL CCSD 2013
• Subjects: [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering; [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]; Arctic
• Online Access: https://hal.archives-ouvertes.fr/hal-01464723

32nd ASME International Conference on Ocean, Offshore and Arctic ă Engineering, Nantes, FRANCE, JUN 09-14, 2013 International audience Bluff bodies can be prone to well-known self-excited instability such as ă galloping. Opposite to classical and well documented Vortex Induced ă Vibrations (VIV), oscillation amplitude is not bounded in such a way ă galloping-like instability can alter the integrity of the structure on ă short term. Although stability criteria exist in the literature [1], ă there is a real lack considering the cause and the way to inhibit such ă instability. ă It is consequently proposed in this paper to investigate the flow over ă the classical `non-circular' structure, i.e the square box body, by ă means of advanced Spectral Large Eddy Simulation (LES) solver, [16], ă [17] & [18]. The main objectives of this numerical analysis will be ă to provide an accurate solution to underline the possible mechanisms ă that trigger the instability as well as a base solution for future wake ă stability & control analysis, [6].