Numerical simulation of low-Reynolds number flows past two tandem cylinders of different diameters  

作　　者：Yong-tao WANG Zhong-min YAN Hui-min WANG 

机构地区：[1]College of Environmental Science and Engineering,Suzhou University of Science and Technology [2]College of Water Conservancy and Hydropower Engineering,Hohai University [3]College of Environment,Hohai University

出　　处：《Water Science and Engineering》2013年第4期433-445,共13页水科学与水工程（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.40871050)

摘　　要：The flow past two tandem circular cylinders of different diameters was simulated using the finite volume method. The diameter of the downstream main cylinder （D） was kept constant, and the diameter of the upstream control cylinder （d） varied from 0.1D to D. The studied Reynolds numbers based on the diameter of the downstream main cylinder were 100 and 150. The gap between the control cylinder and the main cylinder （G） ranged from 0.1D to 4D. It is concluded that the gap-to-diameter ratio （G/D） and the diameter ratio between the two cylinders （d/D） have important effects on the drag and lift coefficients, pressure distributions around the cylinders, vortex shedding frequencies from the two cylinders, and flow characteristics.The flow past two tandem circular cylinders of different diameters was simulated using the finite volume method. The diameter of the downstream main cylinder （D） was kept constant, and the diameter of the upstream control cylinder （d） varied from 0.1D to D. The studied Reynolds numbers based on the diameter of the downstream main cylinder were 100 and 150. The gap between the control cylinder and the main cylinder （G） ranged from 0.1D to 4D. It is concluded that the gap-to-diameter ratio （G/D） and the diameter ratio between the two cylinders （d/D） have important effects on the drag and lift coefficients, pressure distributions around the cylinders, vortex shedding frequencies from the two cylinders, and flow characteristics.

关 键 词：two tandem cylinders vortex shedding drag force lift force numerical simulation 

分 类 号：TK401[动力工程及工程热物理—动力机械及工程]