关键词: 大气表面层, 风沙, 模拟, 相似参数

Abstract: The 2D stable incompressible turbulence equations are the starting point for the analysis.The scale dimensional analysis method,a special dimensionless process is used in this paper,A group of inherent referential parameters of the atmospheric surface layer is selected.Then the equations is made dimensionless form and the similarity parameter in each item is made to be able to represent the quantitative order of that item.So that the relative value of each item in the equations can be estimated quantitavely.It should be pointed out that it is both impossible and unnecessary to simulate the flow Reynolds number Re when the atmospheric surface layer is simulated in wind tunnel.In fact the critical similarity parameters are the logarithmic wind profile,the roughness boundary condition of the earth^s surface,turbulence Reynold number Rek and the turbulence level.

Key words: Atmospheric surface layer, Drift sand, Simulation, Similarity parameters