The application of POD to the study of the flow field around oscillating rectangular cylinders

Abstract

The rectangular cylinders are bluff for the flow field, and the aerodynamic phenomena relate to various vortices, such as Karman vortex and one-shear-layer related vortex. Therefore, the rectangular cylinders, whose side ratio is 4, relate the multiple aerodynamic vibrations. In this study, the Proper Orthogonal Decomposition (POD) is applied to the unsteady pressure around oscillating rectangular cylinders, and the structure of flow field around oscillating rectangular cylinders are investigated. Moreover, it is shown that the mode shapes, which are given by POD, show the instantaneous pressure coefficient.