MODELS OF FLOW TURBULATION BY NUMERICAL MODELING
Turbulization of the flow is a complex motion of a liquid or gas, consisting in the formation of a set of vortices with different thermodynamic characteristics. In most chemical-technological processes, turbulent motion of the medium arises, which requires a more complex description than with laminar flows. To study flow turbulence, numerical simulation by means of a computer is used, based on the calculation of the Navier-Stokes equation. The main types of models for describing the motion of fluid and gas flows in the turbulent regime are considered. Areas of application, advantages and disadvantages of each of the applied models are described. It has been established that the most promising method for modeling turbulent flows is the use of several models and the use of the hybrid RANS-LES method based on the Reynolds Averaged Navier-Stokes model and the Large Eddy Simulation model of large eddies.