평판사이 사각 실린더 주위의 난류 유동

초록

Large-Eddy Simulation of turbulent flow past a rectangular cylinder confined in channel was carried out to investigate the effects of cylinder aspect ratio on the flow characteristics. It turns out that the key flow statistics such as turbulence intensity, separation point, wall friction and frequency of vortex shedding were significantly affected by the aspect ratio, indicating a possibility of utilizing the large-scale vortices shed from the cylinder to control heat transfer on the channel walls. The present LES results are in good agreement with the experimental results by Nakagawa etal.(1999).