Affiliations: Dept. of Mechanical Engineering, Pohang University of
Science and Technology, Pohang, 790-784, Korea. E-mail:
[email protected]
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.