Binary Correlation Method for 2D・PTDand its Application to Two Cylinder Interaction Flow

This study deals with fluctuating interaction flows around two circular cylinders arrayed in tandem arrangement. After the flows are visualized by a hydrogen bubble tracer technique，the two-dimensional particle tracking velocimetry (2D-PTV) based on binary correlation method is applied to measure the flow velocities of the whole field. Using the results of instantaneous and time mean velocity vectors，vorticity contours, streamlines and root mean square values of the fluctuating velocities，the analysis and discussions on the flow fields are made