On the modelling of the electro-hydrodynamic flow field in electrostatic precipitators (Q1610402)

Electro-hydrodynamic flows (EHD) in the electrostatic precipitator channel are examined numerically. The numerical calculations were performed for two parallel conducting flat metallic plates connected with ground potential and a row high voltage discharges electrodes. The Poisson equations that is containing the ionic space charge and the particle space charge and Navier-Stokes equations are used for studying the problem. For calculation turbulent flows the Reynolds -- averaged Navier-Stokes equations that are included the electric body force and the standard \(k-\varepsilon\) model of turbulence are taken. The electric body force is considered as the source of a perturbation of a fully developed channel flow. Streamlines of secondary flow with and without applied volume force for different flow models including the standard \(k-\varepsilon\) model of turbulence are presented. Profiles of eddy diffusivity at various positions in mean flow direction with and without applied volume force using the standard \(k-\varepsilon\) model of turbulence are given. Unfortunately, the comparison of numerical results with experiments and selections of constants \((C_\mu, C_{\varepsilon 1}, C_{\varepsilon 2},C_1,C_2,C_s)\) for the \(k-\varepsilon\) model of turbulence are not examined. Constants for the \(k-\varepsilon\) model of turbulence in EHD flows could differ from pure gas turbulent flow.