Streaming numerical simulation of cylinder pier laminar flow and control measure research on external concave rib

Zijian Wang^{1, 2}, Liming Wu³, Shengxie Xiao⁴

COMPUTER MODELLING & NEW TECHNOLOGIES 2014 18(12D) 331-335

¹Chongqing University of Science&Technology, Chongqing, China, 401331
²T.Y.Lin International Engineering Consulting (China) Co., Ltd, Chongqing 401121
³Chongqing Technology and Business Institute, Chongqing, China, 400052
⁴Chongqing Jiaotong University, Chongqing, China, 400074

This paper utilizes FIUENT Software to simulate the appearance, development and change of vortex shedding in cylinder streaming under low Reynolds number, calculates displacement of pressure coefficient and changing rules of lift and resistance coefficients on cylinder surface and introduces working conditions with 10 different rib heights on cylinder surface to do comparative calculation so as to acquire the control measures of concave rib streaming on cylinder surface. Calculation results show that the application of concave rib on cylinder surface could help effectively control vortex shedding of cylinder surface, reduce its resistance and restrain vibration. Calculation results of each parameter are consistent with those in literatures. When height of concave rib is 0.12D, effect of restraining streaming is the best. At this moment resistance coefficient of cylinder surface is 1.0849 which decreases about 39.609% comparing with its resistance coefficient without concave rib. Meanwhile lift coefficient reduces by 79.691%. The results above provide references for control measures of cylinder pier streaming.