Abstract: The solid wall turbulent shear flow behind two-dimensional small obstacles placed onthe plane is numerically simulated using RNG K-ε model and standard K-ε model. The model ofsmall obstacles used in this study have nine types, such as plate, square and cylinder et al. A finitevolume method with the collocated variable arrangement employing orthogonal grids was used tosolve the equation system. The pressure and mean velocity, turbulent energy, dissipation rate ofturbulent energy are coupled by SIMPLE algori...