OBSERVATION OF FLOW AROUND A VERTICAL CYLINDER IN A PARALLEL CHANNEL

Abstract

Three dimensional flow around a cylinder settled vertically between walls in a parallel channel was studied using pearl pigment as flow visualization additive in water flow. Horseshoe vortex around the cylinder was observed, and a new periodical vortex system was found at high Reynolds number. Downstream the cylinder, alternating vortexes were found, but this vortex shedding Reynolds number was higher by 2 decades than well-known Karman vortex.