Experimental observations on the relationship between stagnation region flow oscillations and eddy shedding for circular cylinder

Measurements indicate a direct coupling between the dominant frequencies of flow oscillations at the leading-edge stagnation region, laminar-separation unsteadiness, and the vortex shedding. An array of surface mounted, micro-thin hot-films were used to simultaneously determine the state of the boundary layer along the surfaced of a circular cylinder, and vortex shedding was monitored by a hot wire placed in its wake.