Three-dimensional Numerical Simulation Of The Wind Flow Past Two Circular Cylinders

Desertification is a fatal environmental problem within allover of world, it not only causes huge economic losses, also damages the global ecological environment. How to manage desertification is a worldwide research topic, among them, planting Shelter forest, planting sand-fixation plants on the dunes surface are important measures on stopping dunes mobile and controlling the development of the wind flow. At present, the numerical simulation research on the role of the Shelter forest is not very enough. With the frequent region of desertification and sandstorms on China's northwest, the research on the role of the Shelter forest in this paper has a realistic significance.In this paper, a Numerical model is carried out on the viscous flow past two tandem circular cylinders and two circular cylinders in side by side. The wind field is numerical investigated through the CFD Numerical simulation and Realizable k-εmodel. The wind field characteristics of 9 different spacing on tandem circular cylinders and 5 different spacing on circular cylinders side by side are calculated. We summarizes the different effects on the wind flow by two tandem circular cylinders and circular cylinders side by side and provide theoretical basis for the problem of planting Shelter forest.The Result shows that, setting too much space between two tandem circular cylinders is unfavorable, for the wind flow will recovery in this space. Meanwhile, we can't set the space too narrow between two circular cylinders side by side, for it will cause complex wind field behind the cylinders, which will Cause the cylinders damaged.