A computational fluid dynamics (CFD) model is carried out to describe the wire-plate electrostatic precipitator (ESP) in high temperature conditions

aiming to study the effects of high temperature on the electro- hydrodynamic (EHD) characteristics. In the model

the complex interactions at high temperatures between the electric field

fluid dynamics and the particulate flow are taken into account. We apply different numerical methods for different fields

including an electric field model

Euler-Lagrange particle-laden flows model

and particle charging model. The effects of high temperature on ionic wind

EHD characteristics and collection efficiency are investigated. The numerical results show high temperature causes more significant effects of the ionic wind on the gas secondary flow. High viscosity of gas at high temperature makes particles follow the gas flow pattern more closely. High temperature reduces the surface electric strength

so that the mean electric strength weakens the space charging. On the contrary

there is an increase in the diffusion charging at high temperature compared with at low temperature. High temperature increases the ratio of mean drag force over mean electrostatic force acting on the particles which may contribute to a decline of collection efficiency.