Abstract
The behavior of the horseshoe vortex and the wake vortex around a square plate standing vertically on the flat plate where the laminar boundary layer was developing was examined by visualization technique. The pattern of the wake vortex could be classified into three group according. to both the Reynolds number Reh and the plate height to boundary layer thickness h/δ in the range of Re h<3700 and h/δ<3. The horseshoe vortex around the square plate showed the characteristic behavior corresponding with the pattern of the wake vortex respectively.
