Computational fluid dynamics evaluation of the effect of different city designs on the wind environment of a downwind natural heritage site (SCI)

CORC > 寒区旱区环境与工程研究所 > 中科院寒区旱区环境与工程研究所（未分类） > 期刊论文

	Computational fluid dynamics evaluation of the effect of different city designs on the wind environment of a downwind natural heritage site (SCI)
	Liu B. L. ; Qu J. J. ; Niu Q. H. ; Wang J. Z. ; Zhang K. C.
刊名	Journal of Arid Land
	2014
卷号	6 期号:1 页码:69-79
英文摘要	Disturbance in wind regime and sand erosion deposition balance may lead to burial and eventual vanishing of a site. This study conducted 3D computational fluid dynamics (CFD) simulations to evaluate the effect of a proposed city design on the wind environment of the Crescent Spring, a downwind natural heritage site located in Dunhuang, Northwestern China. Satellite terrain data from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Digital Elevation Model (DEM) were used to construct the solid surface model. Steady-state Reynolds Averaged Navier-Stokes equations (RANS) with shear stress transport (SST) k-omega turbulence model were then applied to solve the flow field problems. Land-use changes were modeled implicitly by dividing the underlying surface into different areas and by applying corresponding aerodynamic roughness lengths. Simulations were performed by using cases with different city areas and building heights. Results show that the selected model could capture the surface roughness changes and could adjust wind profile over a large area. Wind profiles varied over the greenfield to the north and over the Gobi land to the east of the spring. Therefore, different wind speed reduction effects were observed from various city construction scenarios. The current city design would lead to about 2 m/s of wind speed reduction at the downwind city edge and about 1 m/s of wind speed reduction at the north of the spring at 35-m height. Reducing the city height in the north greenfield area could efficiently eliminate the negative effects of wind spee. By contrast, restricting the city area worked better in the eastern Gobi area compared with other parts of the study area. Wind speed reduction in areas near the spring could be limited to 0.1 m/s by combining these two abatement strategies. The CFD method could be applied to simulate the wind environment affected by other land-use changes over a large terrain.
收录类别	SCI
公开日期	2015-12-24
内容类型	期刊论文
源URL	[http://ir.casnw.net/handle/362004/24785]
专题	寒区旱区环境与工程研究所_中科院寒区旱区环境与工程研究所（未分类）_期刊论文
推荐引用方式 GB/T 7714	Liu B. L.,Qu J. J.,Niu Q. H.,et al. Computational fluid dynamics evaluation of the effect of different city designs on the wind environment of a downwind natural heritage site (SCI)[J]. Journal of Arid Land,2014,6(1):69-79.
APA	Liu B. L.,Qu J. J.,Niu Q. H.,Wang J. Z.,&Zhang K. C..(2014).Computational fluid dynamics evaluation of the effect of different city designs on the wind environment of a downwind natural heritage site (SCI).Journal of Arid Land,6(1),69-79.
MLA	Liu B. L.,et al."Computational fluid dynamics evaluation of the effect of different city designs on the wind environment of a downwind natural heritage site (SCI)".Journal of Arid Land 6.1(2014):69-79.