Mathematical Modeling of a Turbulent Flow in a Centrifugal Separator

Abstract

The numerical results of mathematical modeling of a two-phase axisymmetric swirling turbulent flow in a separation zone of a centrifugal separator are presented. The motion of the carrier gas flow is described by the Reynolds-averaged Navier-Stokes equations. A system of equations is enclosed by the Spalart-Allmaras turbulence model. The study is based on the obtained fields of averaged velocities of the carrier medium, with account for turbulent diffusion. Numerical solution to the problem is implemented using the semi-implicit method for pressure linked equations (SIMPLE). The results obtained when the solid phase effect on the air flow dynamics is taken into account are compared with those obtained when the effect is left out of account. The numerical calculations are validated using the experimental data.

Mathematical modelling of heat and hydraulic processes in a solar air heater with a concave air duct absorber

“…To match the pressure with the velocities, the computational grid was placed in a checkerboard pattern. Velocity correction through pressure was carried out using the SIMPLE procedure [22]. The graphs presented above were calculated by analytical processing of the results obtained on the basis of experimental studies obtained under different conditions in the solar air heater collector.…”

“…Turbulence is modelled using the Spalart-Allmaras (SA) model. The single equation model is given by the following equation [22].…”

Numerical study of the efficiency of single and group centrifugal cyclones

“…To numerically study the problem posed, a system of Reynolds-averaged Navier-Stokes equations is used [11][12][13]. Thus, for mathematical modeling of the processes of transfer of dust particles and aerosols in dust collectors, it is sufficient to take into account the centrifugal, gravitational G, FA and Stokes force F.…”

Aerodynamic study of the characteristics of the nest one skyscraper under wind load

“…It is an extension of the k-ε and k-ω models, and is generally considered more accurate and realistic for a variety of problems. To date, these models have been used to obtain numerical solutions to many important practical problems [7][8][9][10][11]. The purpose of this article is to study the influence of wind flow on the NEST ONE skyscraper based on computer modeling Comsol Multiphysics.…”