Vortex shedding from a circular cylinder near a moving wall |
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| Institution: | 1. Fluids Laboratory for Aeronautical and Industrial Research (FLAIR), Department of Mechanical and Aerospace Engineering, Monash University, Clayton, Victoria 3800, Australia;2. Division of Biological Engineering, Monash University, Clayton 3800, Australia;3. Department of Mathematics, Technical University of Denmark, Lyngby DK-2800, Denmark;4. IRPHE UMR 7342, CNRS, Aix-Marseille Université, 13384 Marseille, France;1. Department of Mechanical Engineering, National University of Singapore, 21 Lower Kent Ridge Road, Singapore 119077, Singapore;2. NUS Graduate School for Integrative Sciences and Engineering (NGS), 28 Medical Drive, Singapore 117456, Singapore;1. School of Civil and Environmental Engineering, Nanyang Technological University, Singapore;2. Centre for Offshore Research and Engineering, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore 117576, Singapore;1. Fluids Laboratory for Aeronautical and Industrial Research (FLAIR), Department of Mechanical and Aerospace Engineering, 17 College Walk, Monash University, Clayton 3800, VIC, Australia;2. Institut de Recherche sur les Phénomènes Hors Équilibre (IRPHÉ), UMR 7342, CNRS, Aix-Marseille Université, Centrale Marseille, 13384, Marseille, France |
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| Abstract: | Flow over a circular cylinder near a moving plane wall is simulated numerically. The influence of the moving wall on the vortex shedding from the cylinder is demonstrated and the corresponding mechanism is illustrated using instability theory. A critical gap ratio between the circular cylinder and the moving wall is defined, and a precise method for determining the critical gap ratio is proposed. The drag and lift forces and the pressure coefficient are presented as a function of the gap ratio. The scaling of the Strouhal number is discussed. |
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