Discrete vortex simulation for flow around a circular cylinder with a splitter plate: Fid-Bau Portal

Discrete vortex simulation for flow around a circular cylinder with a splitter plate

Kawai, H.

AbstractA discrete vortex model was developed to investigate unsteady flow in a wake of a circular cylinder with a splitter plate. In the model the splitter plate was expressed by a series of sources such as to cancel out the flow across it. Various flow features which had been observed experimentally by many researchers were successfully reproduced in the simulation. The vortices suddenly rolled up between the cylinder and the plate when the distance between them was beyond the critical value. The critical distance was hardly affected by the size of the plate when the plate was along the flow, on the other hand it increased proportionally to the size of the plate when the plate was normal to the flow. The critical distance was about a half of the experimental results at Reynold number 10⁴–2×10⁴, because the length of the vortex formation region in the simulation was shorter than in the experiments. It was also clarified that the various physical quantities such as the base pressure coefficient, the fluctuating lift coefficient, the Strouhal number and the position of the separation point, etc., were systematically varied according to the change of the flow pattern.