APPLICATION OF ke-MODEL FOR THE DESCRIPTION OF AN ATMOSPHERIC SURFACE LAYER

M.G. Anuchin, V.E. Neuvazhayev, I.E. Parshukov
VANT. Ser.: Mat. Mod. Fiz. Proc 2001. Вып.2. С. 11-27.

The problem on determination of non-dimensional characteristics of turbulent flow in atmospheric surface layer is considered within ke-model. ke-equations and their singular points are investigated. A mathematical program for calculating characteristics of turbulent flow in the surface atmospheric layer is developed. From the set of integral curves those are chosen which correspond to the solution of a formulated task and ensure the satisfactory experiments description. Here the basic model constants are chosen according to the conventional criteria. At the same time it is shown that the parameter C_q corresponding to convection source term of an e-equation should be chosen depending on stability conditions. The best agreement with experimental results is reached if C_q = 0 for steady stratification and C_q 0 for unstable stratification. By a numerical choice of value C_q and factor of turbulent diffusion the quite satisfactory description of experimental observations known as analytical interpolational dependencies is received.