Abstract
The POD (Proper Orthogonal Decomposition) method was used to investigate the near-wake behind an elliptic cylinder located under a free surface. For two different depths of cylinder submergence, the first four eigenmodes of the flow field were calculated and their structures were analyzed. The first four eigenmodes reveal the details about the global mean flow structure, with the large-scale structure being mainly related to the most energetic flow motion. The convergence of accumulated eigenvalues shows a slight dependence on the number of instantaneous velocity fields used in POD analysis.
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References
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Daichin (Dai Qin): He received his MSc from Inner Mongolia University (China) and his Ph.D. in Offshore Engineering from Dalian University of Technology, China in 1998. He worked as a post-doctoral researcher at the Institute of Fluid Mechanics, BUAA (Beijing University of Aeronautics and Astronautics) from 1998 to 2000. Since then he has worked as a post-doctoral researcher at the Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH). His research interests include flow visualization, the PIV technique, and bluff-body hydro/aero dynamics.
Sang Joon Lee: He received his MSc and Ph.D. in Mechanical Engineering from KAIST (Korea Advanced Institute of Science and Tech.) in 1982 and 1986, respectively. In 1986 he worked as a senior researcher at KIMM. He joined the Department of Mechanical Engineering at POSTECH as an Assistant Professor in 1987, and in 1999 he became a full professor. His research interests include quantitative flow visualization (PIV, PTV, LIF, and Holography), experimental fluid mechanics, bluff body aerodynamics, microfluidics and flow control.
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Daichin, Lee, S.J. POD analysis of near-wake structures of an elliptic cylinder adjacent to a free surface. J Vis 7, 179–186 (2004). https://doi.org/10.1007/BF03181632
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DOI: https://doi.org/10.1007/BF03181632