The contribution presents a mathematical and numerical investigation of the Atmospheric Boundary Layer (ABL) flow over the real configuration given by a brown coal mine and coal depot in North Bohemia. The influence of various types of protective
obstacles (as forest blocks, tree-line, walls) on the reduction of dustiness has been studied.
The mathematical models are based on the system of Reynolds Averaged Navier-Stokes (RANS) equations for a viscous incompressible flow. The full system of RANS equations in conservative form was solved using finite-volume explicit scheme and artificial compressibility method. A simple algebraic turbulent model was used for the closure of the basic system of equations. Additional transport equation for passive pollutant has been considered in order to study the pollution dispersion over the
complex 3D topography. The forest stand is simulated using the additional source term in the momentum equations which depends on the local velocity magnitude, the characteristic area of the obstacle and on the drag coefficient. and Obsahuje seznam literatury
The paper deals with a flow validation study performed using our in-house 3D-computer-code which implements mathematical and numerical model capable to simulate the atmospheric boundary layer flow in general. The validation study is related to a neutrally stratified boundary layer 2D-flow over an isolated hill with a rough wall including pollution dspersion according to Castro [1].
Our mathematical model is based on the system of RANS equations closed by two-equation high-Reynolds number k-ε turbulence model together with wall functions. The finite volume method and the explicit Runge-Kutta time integration method are utilized for the numerics. and Obsahuje seznam literatury