Abstract
The purpose of this study is to understand the details of the vortex roll-up process in the wake of the flat plate. Instability analysis is well known, but the details of physical mechanism of vortex roll-up are not understood enough. Flow patterns in the wake of the each flat plate with different thickness of trailing-edge were observed in detail by various flow visualization techniques, and the ralations between flow pattern and vortex roll-up process were showed.
