University Proceedings. Volga Region. Physical and Mathematical Sciences

Abstract

Background. Flows of electrically charged gas suspensions occur both in the processes of spraying electrically charged powder coatings and in the processes of electrical filtration of dusty media. In such flows, dispersed inclusions move under the influence of both the Coulomb force and gas-dynamic forces. This work examines the influence of particle material density on the dynamics of gas suspensions in an aerodynamic and electric field. Materials and methods. The mathematical model implemented a continuum approach to modeling the dynamics of inhomogeneous media; the model took into account the interaction between the carrier and dispersed phases of the mixture. The carrier medium was described as a viscous, compressible, heat-conducting gas. Results. The process of propagation of a low-intensity shock wave from a homogeneous gas into an electrically charged gas suspension was numerically simulated. At the same time, the parameters of the flows of electrically charged gas suspensions were compared with the surface and mass densities of the electric charge. Materials of the dispersed phase of gas suspension with different physical densities were considered. It was revealed that for the mass model of charge density there is an increase in the Coulomb force acting per unit volume of a gas suspension with increasing density of the particle material. For surface charge density, the material density of the particles does not affect the specific Coulomb force acting on the particles. In this case, both in electrically neutral and electrically charged gas suspensions with a surface electric charge density, an increase in the density of the dispersed phase material affects the flow parameters of the carrier and dispersed phases. Conclusions. For the mass model of electric charge density, as the density of the particle material increases, the influence of the electric field on the dynamics of the dispersed phase increases and, through interphase interaction, on the dynamics of the carrier medium.

Keywords

• multiphase media
• gas suspensions
• electrohydrodynamics
• interphase interaction
• numerical modeling