Abstract
The flow visualization technique has the advantage of displaying the whole flow field at one time whether steady or unsteady. In this study, Kármán vortex flow past a circular cylinder at Re=100 is made visible by means of tracer method in order to obtain instantaneous velocity vector distributions. A large number of tracer paths on photographs are processed by the use of a digitizing tablet whose output signals are put into the micro computer system. The computer calculates mesh point velocity vectors as well as stream function, vorticity, and pressure values after the method used in numerical experiments. All the results are presented on the CRT display in the form of contour lines. Some consideration is made as to vortex development and dissipation behind a cylinder.
