NUMERICAL SIMULATION OF FLOW DURING THE INTERACTION OF WIND WITH A FLAT ROUGH SURFACE

Abstract

Studies have been carried out on the role of various methodological factors in the numerical simulation of flow during the interaction of wind with a rough surface. These factors include the eddy viscosity model and various types of boundary conditions. The formulation of the problem took into account the possibility of using the results in problems of transporting a dust cloud of explosions in deep mining quarries It is shown that a forced decrease in eddy viscosity with decreasing distance to the surface significantly improves the results of numerical simulations near the surface. The continuous supply of a constant vertically stratified air flow across the boundary of the computational domain creates atmospheric disturbances in the process of modifying the inflowing flow by a numerical model. It is shown that these disturbances initiate the propagation in the atmosphere of time-stable harmonic air oscillations downstream with a wavelength of ~ 2000 m.